Bulk nanocrystalline 304L and 316L austenitic stainless steels (SS) were produced by equal channel angular pressing(ECAP) at elevated temperature. The average grain size achieved in 316L and 304 L SS is ~ 100 nm, and grain refinement occurs more rapid in 316 L SS than that in 304L. Also the structures are shown to retain a predominant austenite phase. Hardness increases by a factor of about 2.5 in both steels due largely to grain refinement and an introduction of a high density of dislocations. Tensile strength of nanocrystalline steels exceeds 1 GPa with good ductility in both systems. Mechanical properties of ECAPed 316L are also shown to have less dependence on strain rate than ECAPed 304L. ECAPed steels were shown to exhibit thermal stability up to 600oC as indicated by retention of high hardness in annealed specimens. Furthermore, there is an increased tolerance to radiation-induced hardening in the nanocrystalline equiaxed materials subjected to 100 keV He ions at an average dose of 3-4 displacement-per-atom level at room temperature. The large volume fraction of high angle grain boundaries may be vital for enhanced radiation tolerance. These nanocrystalline SSs show promise for further research in radiation resistant structural materials for next-generation nuclear reactor systems.

Materials used in thermal power plants have to resist creep deformation for time periods up to 30 years. Material evaluation is typically based on creep testing with a maximum duration of a few years. This information is used as input when empirically deriving models for creep. These kinds of models are of limited use when considering service conditions or compositions different from those in the experiments. In order to provide a more general model for creep, the mechanisms that give creep strength have to be identified and fundamentally described. By combining tools for thermodynamic modelling and modern dislocation theory the microstructure evolution during creep can be predicted and used as input in creep rate modelling. The model for creep has been utilised to clarify the influence of aluminium on creep strength as a part of the European COST538 action. The results show how AlN is formed at the expense of MX carbonitrides. The role of heat treatment during welding has been analysed. It has been shown that particles start to dissolve already at 800ºC, which is believed to be the main cause of Type IV cracking in commercial alloys. The creep strength of these steels relies on minor additions of alloying elements. Precipitates such as M23C6 carbides and MX carbonitrides give rise to the main strengthening, and remaining elements produce solid solution hardening. Particle growth, coarsening and dissolution have been evaluated. By considering dislocation climb it is possible to determine particle strengthening at high temperatures and long-term service. Transient creep is predicted by considering different types of dislocations. Through the generation and recovery of dislocation densities an increase in work hardening during primary creep is achieved. The role of substructure is included through the composite model. Cavity nucleation and growth are analysed in order to explain the intergranular fracture and to estimate the ductility. / QC20100616

L'utilisation de l'acier inoxydable duplex (DSS) pour des applications structurales est considérée comme l'un des progrès les plus notables et qui a le plus grand impact sur le secteur de la construction. Ceci est grâce à ses propriétés mécaniques élevées couplées avec des propriétés fonctionnelles intéressantes telles que la résistance à la corrosion, ou encore la faible conductivité thermique par rapport aux aciers au carbone. En raison de sa microstructure et l'interaction complexe entre les phases, DSS a un fort potentiel pour le développement des propriétés uniques. Une meilleure compréhension est nécessaire pour obtenir des propriétés exceptionnelles et fournir la possibilité de concevoir un DSS sur-mesure et architecturé pour des applications spécifiques. Dans ce travail, nous avons proposé une approche différente de celle utilisée jusqu'à présent pour comprendre le comportement du DSS. La stratégie adoptée dans ce travail était une stratégie dite top-down dans laquelle au moins deux métaux ayant un comportement et des propriétés bien connues sont mécaniquement assemblés par déformation plastique sévère (SPD). Cette stratégie proposée a pour objectifs: i) améliorer les propriétés par raffinement de microstructure jusqu’à une échelle sub-micrométrique ii) l'élaboration d'un matériau modèle permettant de comprendre le comportement DSS obtenu par les méthodes métallurgique conventionnelles. Le premier objectif de ce travail était, par conséquent, la mise en œuvre d'une méthodologie de fabrication en utilisant la technique SPD par co-tréfilage. Cette technique permettra l'obtention d'une microstructure ultrafine des composites 316L / 430LNb. L'un des défis rencontrés au cours de notre étude était l'inter-diffusion significative lors de traitement thermique susceptible de limiter un raffinement supplémentaire de la microstructure en question. Une étude d'optimisation a été effectuée pour tenir compte du rôle de cette inter-diffusion pour un couple 316L / 430LNb. Ainsi, des micro-composites multi-échelles ont été obtenus. Dans ce travail, nous avons montré la limitation de ce processus en termes de raffinement de microstructure. Une rationalisation de ces limites a été donnée par une étude thermocinétiques sur les micro-composites et matériaux brut initialement utilisés. Parallèlement à l'évaluation de la microstructure, le comportement mécanique de ces nouveaux micro-composites a été examiné. Afin de fournir une explication plus approfondie sur le comportement plastique de nos composites, des essais de traction in situ par rayonnement X synchrotron à haute énergie ont été effectués. / The use of duplex stainless steel (DSS) grades for structural applications is considered as one of the most significant advances impacting the construction sector. This is because of their high mechanical properties coupled with interesting functional properties such as corrosion resistance or even the low thermal conductivity compared to carbon steels. Due to their complex microstructure and interaction between the phases, DSS have a significant potential for unique properties. A better understanding is needed to give the possibility to obtain break through properties and to provide the possibility to design tailor-made, architectured DSS for specific applications. In this work we proposed a different approach from that used until now to understand the behavior of DSS. The strategy adopted in this work was a top-down strategy in which at least two bulk metals with well known behavior and properties are mechanically alloyed by Severe Plastic Deformation (SPD). This proposed strategy served two main objectives: i) enhancing the properties by microstructure refining down to sub-micron scale ii) elaborating a material model for understanding the DSS behavior obtained by the conventional metallurgical methods. The first objective of this work was, therefore, the implementation of a methodology of manufacturing using SPD technique by co-drawing. This technique will allow obtaining an ultra-fine microstructure of 316L/430LNb composites. One of the challenges met during our study was the significant inter-diffusion during heat-treatment step necessary during processing preventing by consequence further refining. An optimization investigation was carried out to account the role of this inter-diffusion for 316L/430LNb couple. Multi-scale micro-composites have been then obtained. In this work, we showed the limitation of this process in terms of microstructure refining. A rationalization of these limits was given by studying the thermo-kinetics of both micro-composites and bulk materials. In parallel with the microstructural evaluation, the mechanical behavior of these new micr-composites was examined. In order to provide a more in-depth explanation of the plastic behavior of our composites, in situ tensile test using high energy X-ray synchrotron have been performed.

O desenvolvimento de componentes com geometrias complexas e funcionalidade superficial representa um grande desafio científico atual. O processo Metal Injection Molding (MIM) tem representado, nos últimos anos, uma grande alternativa para a produção de aços com estas características e elevada produtividade. Existe uma crescente demanda referente ao estudo e utilização de aços inoxidáveis MIM e a melhora de suas propriedades mecânicas e metalúrgicas superficiais. Com a aplicação de engenharia de superfície é possível obter aumento da microdureza superficial, da resistência ao desgaste, da vida em fadiga e da resistência à corrosão. Uma das características emblemáticas dos aços MIM é seu maior volume de porosidade, quando comparado aos aços obtidos pelos processos convencionais. Destaca-se que o volume de porosidade pode ter efeito negativo em relação à resistência mecânica e à corrosão nestes aços. O volume de porosidade também colabora para que componentes produzidos por este processo sejam fortemente influenciados, por efeitos de erosão de bordas, e dificuldade de difusão uniforme, em regiões com furação, inibindo a homogeneização das camadas de compostos e difusão. Neste trabalho objetivou-se desenvolver as ligas em aços inoxidáveis a partir de pós metálicos aglutinados com polímeros e pesquisar as propriedades metalúrgicas e mecânicas superficiais, obtidas a partir da aplicação de tratamento termoquímico de Oxinitrocarbonetação (QPQ), nos aços inoxidáveis MIM AISI 316L e 17-4 PH e o efeito do acabamento intermediário jateado na resistência a corrosão, que representa modificação deste processo. Os ciclos de difusão utilizados foram referendados a partir de tempos de 30, 60 e 120 minutos utilizando-se temperatura de nitrocarbonetação 570ºC e de oxidação 380ºC. As avaliações das propriedades das amostras oxinitrocarbonetadas foram realizadas em ensaios de microscopia óptica, microscopia eletrônica de varredura, microdureza Vickers, polarização potenciodinâmica anódica, difração de raios - X (para determinação das fases na camada de compostos) e difração de raios - X (para determinação de tensões residuais). Os resultados obtidos demonstraram efetivo aumento da microdureza superficial, formação de camada de compostos monofásica, melhora da resistência a corrosão e tensões residuais compressivas na superfície dos aços AISI 316 L e 17 4 PH MIM. / The development of components with complex geometries and surface functionality is a current scientific challenge. There is an increasing demand related to the study and use of stainless steel Metal Injection Molding (MIM) and the improvement of their surface mechanical and metallurgical properties. With the application surface engineering it is possible to obtain increased surface hardness, wear resistance, fatigue life and corrosion resistance. One of the iconic features of MIM steels is its largest volume of porosity, when compared to conventional steels. It is noteworthy that the volume of porosity may have a negative effect on the mechanical and corrosion resistance. The volume porosity also contributes to components produced by this process are strongly influenced by edge effects of erosion and uniform diffusion regions difficulty with drilling, inhibiting the mixing of compounds and diffusion layers. Other research has shown that high volumes of porosity may be associated with the presence of corrosive pitting progressively accentuate the deterioration of these materials. In this work we were researched surface metallurgical and mechanical properties of the thermochemical treatment application Oxinitrocarburizing- QPQ in stainless steel AISI 316L ME and 17 4 PH and the effect of the intermediate blasted finish on the corrosion resistance. Assessments of properties of the samples Oxinitrocarburizing by QPQ process were carried out in optical microscopy tests, scanning electron microscopy, Vickers hardness, anodic potentiodynamic polarization, diffraction X - ray (determination of the phases in the compound layer), and - ray diffraction x (residual stresses).The results demonstrated effective increase of the surface hardness, forming a single phase compound layer improves the corrosion resistance and compressive residual stresses on the surface of steels AISI 316 L and 17 4 PH MIM.

Os Aços Avançados de Alta Resistência ou AHSS (do inglês Advanced High Strength Steels) apresentam muitas vantagens mecânicas em relação aos aços convencionais. Seu uso crescente na indústria automotiva deve-se principalmente à sua capacidade de possibilitar a redução de peso e, ao mesmo tempo, o aumento da segurança aos ocupantes do veículo em caso de colisões. No entanto, apresentam maiores dificuldades no que se refere à conformabilidade (maiores níveis de solicitação e desgaste das ferramentas, menor deformabilidade plástica, etc). Assim, alguns testes para avaliar a conformabilidade destes materiais ganham maior importância. É o caso do Teste de Expansão de Furos, cuja propriedade medida é a Razão de Expansão de Furos (REF). Neste trabalho investiga-se o processo de expansão de furos para o aço avançado de alta resistência (AHSS) martensítico DOCOL 190M, sob as seguintes condições de processo: duas formas de obtenção do furo (jato d’água e usinagem); duas geometrias distintas de punções (cônico de 60º e elíptico); diversos diâmetros do furo inicial; com e sem o uso de lubrificante; com acabamento diferenciado da borda do furo; e expansão com deslocamento do punção em etapas. Os experimentos demonstram que a expansão de furos possui uma estreita relação com a geometria do punção utilizado para a expansão, bem como com o diâmetro do furo inicial, acabamento da borda e condições de lubrificação. A partir dos resultados experimentais de expansão de furos foi possível realizar a calibração de um software de simulação computacional em relação ao dano crítico do material no momento da fatura na borda do furo. / Advanced High Strength Steels (AHSS) offer many mechanical advantages over conventional steels. Its increasing use in the automotive industry is mainly due to its ability to reduce weight and, at the same time, increase occupant safety in the event of collisions. However, they present greater difficulties with respect to the formability (higher levels of solicitation and wear of the tools, lower plastic formability, etc). Thus, some tests to evaluate the formability of these materials come to have greater importance. This is the case of the Hole Expansion Test, whose measured property is the Hole Expansion Ratio (REF). This work investigates the hole expansion process for a martensitic advanced high-strength steel (AHSS), DOCOL 190M, under the following process conditions: two ways of obtaining the hole (water jet and machining); two different geometries of punctures (conical of 60º and elliptical); various diameters of the initial hole; with and without the use of lubricant; with differentiated finishing of the hole edge; and expansion with punch displacement in steps. The experiments demonstrate that the hole expansion has a close relationship with the geometry of the punch used for the expansion, as well as the initial hole diameter, edge finish and lubrication conditions. From the experimental hole expansion results it was possible to carry out the calibration of a computational simulation software in relation to the critical damage of the material at the moment of hole edge rupture.

No description available.

La demande croissante en énergie nécessite l'exploration de pétrole et de gaz dans des conditions plus difficiles. Ces systèmes de production exigent l'utilisation d'équipements forgés faits de nuances d'acier de plus haute résistance, comme les aciers inoxydables austéno-ferritiques (duplex). Ces composants tendent à présenter une perte de ductilité et de performance mécanique générale provoquée par l'hydrogène produit par p. ex. des systèmes de protection cathodique et des processus de corrosion. Les composants en aciers inoxydables duplex présentent une longue histoire d’endommagement par l'hydrogène à basse température provenant de diverses sources. Bien qui ce type de endommagement soit assez récurrent, diverses informations connexes restent à élucider, en raison de l'interaction complexe de l'hydrogène avec la microstructure et le caractère localisé de la production et du transport de l'hydrogène dans le matériau.Le présent travail vise à améliorer la compréhension physique de l'interaction entre l'hydrogène et la microstructure ainsi que les effets de différentes procédures de chargement d'hydrogène sur les propriétés mécaniques des composants forgés en acier inoxydable super duplex UNS S32750.Le développement d'une telle compréhension implique l'évaluation des effets de l'hydrogène sur les propriétés mécaniques du matériau au moyen d'essais de traction dans différents environnements riches en hydrogène. Basé sur des résultats d'essais de traction à vitesse de déformation faible, une relation quantitative entre la fragilisation provoquée par l'hydrogène gazeux et cathodique est proposée, et les effets possibles de la fragilisation par l’hydrogène provoquée par dislocations sont discutés.Des descriptions quantitatives et qualitatives du transport de l'hydrogène, incluant l'analyse des effets des différentes microstructures et voies de diffusion, et de sa position dans le réseau et dans la microstructure (ségrégation de l'hydrogène aux pièges) sont proposées. Ces descriptions sont obtenues en considérant les résultats de différentes techniques expérimentales: essais de perméation, spectroscopie de désorption thermique, spectroscopie de masse d'ions secondaires à temps de vol et diffusion de neutrons. / The increasing demand for energy requires the exploration of oil and gas at deeper water locations and on more severe conditions. These production systems have demanded the use of forged equipments made of higher strength steel grades, such as austenitic-ferritic (duplex) stainless steels. These components are more prone to exhibit loss of ductility and general mechanical performance caused by hydrogen generated e.g. by cathodic protection. Duplex stainless stainless steels components present a vast history of hydrogen damage at low temperatures, due to hydrogen derived from various sources. Even being this kind of damage fairly recurring, various related information remains to be elucidated, due to the complex interaction of hydrogen with the microstructure and localized character of hydrogen generation and transportation in the material. The present work aims to improve the physical understanding of the interaction between hydrogen and the microstructure as well as the effects of different hydrogen charging procedures on the mechanical properties of forged components made of the super duplex stainless steel grade UNS S32750.The development of such understanding involves the evaluation of the effects of hydrogen on the mechanical properties of the material through tensile tests in different hydrogen-rich environments. Based on results of slow-strain rate tensile tests, a quantitative relationship between embrittlement caused by gas hydrogen and cathodic charging is proposed, and possible effects of dislocation-assisted hydrogen transportation and embrittlement are discussed. Quantitative and qualitative descriptions of the hydrogen transportation, including analysis of the effects of different microstructures and diffusion paths, and of its position in the lattice and in the microstructure (hydrogen segregation to traps) are proposed. These descriptions are achieved considering results of different testing techniques: permeation tests, thermal desorption spectroscopy, time-of-flight secondary ion mass spectroscopy and neutron scattering.

O desenvolvimento de componentes com geometrias complexas e funcionalidade superficial representa um grande desafio científico atual. O processo Metal Injection Molding (MIM) tem representado, nos últimos anos, uma grande alternativa para a produção de aços com estas características e elevada produtividade. Existe uma crescente demanda referente ao estudo e utilização de aços inoxidáveis MIM e a melhora de suas propriedades mecânicas e metalúrgicas superficiais. Com a aplicação de engenharia de superfície é possível obter aumento da microdureza superficial, da resistência ao desgaste, da vida em fadiga e da resistência à corrosão. Uma das características emblemáticas dos aços MIM é seu maior volume de porosidade, quando comparado aos aços obtidos pelos processos convencionais. Destaca-se que o volume de porosidade pode ter efeito negativo em relação à resistência mecânica e à corrosão nestes aços. O volume de porosidade também colabora para que componentes produzidos por este processo sejam fortemente influenciados, por efeitos de erosão de bordas, e dificuldade de difusão uniforme, em regiões com furação, inibindo a homogeneização das camadas de compostos e difusão. Neste trabalho objetivou-se desenvolver as ligas em aços inoxidáveis a partir de pós metálicos aglutinados com polímeros e pesquisar as propriedades metalúrgicas e mecânicas superficiais, obtidas a partir da aplicação de tratamento termoquímico de Oxinitrocarbonetação (QPQ), nos aços inoxidáveis MIM AISI 316L e 17-4 PH e o efeito do acabamento intermediário jateado na resistência a corrosão, que representa modificação deste processo. Os ciclos de difusão utilizados foram referendados a partir de tempos de 30, 60 e 120 minutos utilizando-se temperatura de nitrocarbonetação 570ºC e de oxidação 380ºC. As avaliações das propriedades das amostras oxinitrocarbonetadas foram realizadas em ensaios de microscopia óptica, microscopia eletrônica de varredura, microdureza Vickers, polarização potenciodinâmica anódica, difração de raios - X (para determinação das fases na camada de compostos) e difração de raios - X (para determinação de tensões residuais). Os resultados obtidos demonstraram efetivo aumento da microdureza superficial, formação de camada de compostos monofásica, melhora da resistência a corrosão e tensões residuais compressivas na superfície dos aços AISI 316 L e 17 4 PH MIM. / The development of components with complex geometries and surface functionality is a current scientific challenge. There is an increasing demand related to the study and use of stainless steel Metal Injection Molding (MIM) and the improvement of their surface mechanical and metallurgical properties. With the application surface engineering it is possible to obtain increased surface hardness, wear resistance, fatigue life and corrosion resistance. One of the iconic features of MIM steels is its largest volume of porosity, when compared to conventional steels. It is noteworthy that the volume of porosity may have a negative effect on the mechanical and corrosion resistance. The volume porosity also contributes to components produced by this process are strongly influenced by edge effects of erosion and uniform diffusion regions difficulty with drilling, inhibiting the mixing of compounds and diffusion layers. Other research has shown that high volumes of porosity may be associated with the presence of corrosive pitting progressively accentuate the deterioration of these materials. In this work we were researched surface metallurgical and mechanical properties of the thermochemical treatment application Oxinitrocarburizing- QPQ in stainless steel AISI 316L ME and 17 4 PH and the effect of the intermediate blasted finish on the corrosion resistance. Assessments of properties of the samples Oxinitrocarburizing by QPQ process were carried out in optical microscopy tests, scanning electron microscopy, Vickers hardness, anodic potentiodynamic polarization, diffraction X - ray (determination of the phases in the compound layer), and - ray diffraction x (residual stresses).The results demonstrated effective increase of the surface hardness, forming a single phase compound layer improves the corrosion resistance and compressive residual stresses on the surface of steels AISI 316 L and 17 4 PH MIM.

Em determinadas rotas de manufatura de componentes automotivos, principalmente de produtos do segmento rodoviário pesado, são muito comuns processos de desempeno a quente, assim como outros procedimentos como arqueamento e alinhamento de longarinas. O presente trabalho tem por objetivo traçar os principais impactos destes processos sobre os materiais ASTM A570 GR36-C e o aço de alta resistência e baixa liga norma DIN EN 10149 S700MC em uma rota de fabricação de produtos automotivos com interferência de um procedimento a quente. Esses materiais, quando submetidos a determinados ciclos térmicos para alinhamento a quente, através do aquecimento de algumas regiões pontuais e do posterior resfriamento ao ar calmo têm suas propriedades mecânicas alteradas. Para investigar estas modificações, foram reproduzidas as condições do processo atual para mapeamento de dados de temperatura para os subsequentes ensaios de laboratório. Comparando as amostras submetidas ao ciclo térmico, com as produzidas com a mesma matéria prima sem aquecimento, pode-se verificar o impacto causado pelo processo de alinhamento a quente utilizado sobre as propriedades mecânicas do material. Os resultados mostram que o aço ASTM A570 GR36-C não tem suas propriedades alteradas a ponto de inviabilizar o uso do material. Para o aço DIN EN 10149 S700MC as alterações são expressivas em todos os ciclos térmicos realizados. Com isso, ocorrem modificações na microestrutura pelo tratamento térmico ocasionando a diminuição de algumas propriedades mecânicas importantes, como tensão de escoamento, microdureza e limite de resistência à fadiga. Essas últimas variáveis foram correlacionadas e mostraram o mesmo comportamento. / In certain manufacturing routes of automotive components, especially of heavy road segment products are very common straightening processes hot, as well as other procedures such as bending and alignment of rails. This paper aims to draw the main impacts of these processes on ASTM A570 GR36-C materials and high strength low alloy steel DIN EN 10149 S700MC on a route manufacturing of automotive products with interference from a hot procedure. These materials, when subjected to certain thermal cycles to hot alignment by heating of certain individual regions and the subsequent cooling the still air have changed their mechanical properties. In order to investigate this, they were reproduced the conditions of the current process for temperature mapping data for subsequent laboratory tests. Comparing the samples subjected to thermal cycling with produced with the same raw material unheated, one can ascertain the impact caused by hot alignment process used on the mechanical properties of the material. The results show that the steel ASTM A570 GR36-C does not have its properties changed as to make the use of the material. To DIN EN 10149 S700MC Steel changes are significant in all thermal cycles performed. Thus, changes occur in the microstructure by heat treatment causing a reduction of some important mechanical properties such as yield strength, hardness and fatigue strength limit. The latter variables were correlated and showed the same behavior.

A utilização de aços ferramenta fabricados com tecnologia da metalurgia do pó, bem como seu uso em aplicações que requerem resistência ao desgaste dos materiais em conformação mecânica de ligas, tem sido alvo de estudo e desenvolvimento pela indústria metalmecânica. Através dessa motivação o principal objetivo do trabalho é caracterizar os mecanismos de desgaste em aços ferramenta produzidos por metalurgia do pó (M/P), utilizados em matrizes de estampagem a frio, relacionando a resistência ao desgaste com a microestrutura temperada e revenida dos aços, tratados pelo processo de têmpera a vácuo. Para tanto, foram realizados experimentos utilizando um Forno a vácuo com capacidade de resfriamento de 12 bar, para realizar o processo de tratamento térmico de têmpera e revenimento em amostras dos aços DIN 1.2767, Vanadis® 4, Vanadis® 10, BOHLER S390 e Vancron® 40. As amostras dos aços foram submetidas a ensaios tribológicos para quantificar a resistência ao desgaste em 20N; ensaio de impacto Charpy, ensaio de dureza e a caracterização microestrutural em MEV. Os principais resultados mostraram que o parâmetro de desgaste (W) mostrou melhor desempenho para o aço S390 V, e pior desempenho para os aço DIN 1.2767 nos diferentes acabamentos ensaiados retificados e polidos. Os resultados de caracterização superficial em MEV mostraram o perfil de desgaste da trilha dos aços com melhor e pior desempenho e quais possíveis depósitos superficiais nos materiais após ensaio. As conclusões previas mostraram menor parâmetro (W) de desgaste para o aço ferramenta BOHLER S390 entre os materiais e maior (W) para o aço DIN 1.2767 nas condições de acabamento ensaiadas. / The use of tool steel fabricated with powder metallurgy technology, as well as its use in applications that require resistance to the wear of materials in mechanical alloying, has been studied and developed by the metalworking industry. Through this motivation the main objective of the work is to characterize the wear mechanisms in powder metallurgy (M / P) tool steel used in cold stamping dies, relating the wear resistance with the tempered and annealed microstructure of the steels, Treated by the vacuum quenching process. For this, experiments were carried out using a vacuum furnace with a cooling capacity of 12 bar to perform the tempering and tempering process in samples of DIN 1.2767, Vanadis® 4, Vanadis® 10, BOHLER S390 and Vancron® 40 steels. Samples Of the steels were subjected to tribological tests to quantify the wear resistance in 20N, Charpy impact test, hardness test and microstructural characterization in SEM. The main results showed that the wear parameter W showed better performance for S390 V steel, and worse performance for DIN 1.2767 steel in the different honed and polished tested finishes. The results of surface characterization in SEM showed the wear profile of the track of the steels with better and worse performance and what possible surface deposits in the materials after the test. The previous conclusions showed lower wear parameter W for tool steel BOHLER S390 between materials and higher W for steel DIN 1.2767 in the finishing conditions tested.