This paper examines how the initial austenite grain size in quench and partitioning (Q-P) processes influences the final mechanical properties of Q-P steels. Differences in austenite grain size distribution may result, for example, from uneven heating rates of semi-finished products prior to a forging process. In order to quantify this influence, a carefully defined heat treatment of a cylindrical specimen made of the Q-P-capable 42SiCr steel was performed in a dilatometer. Different austenite grain sizes were adjusted by a pre-treatment before the actual Q-P process. The resulting mechanical properties were determined using the upsetting test and the corresponding microstructures were analyzed by scanning electron microscopy (SEM). These investigations show that a larger austenite grain size prior to Q-P processing leads to a slightly lower strength as well as to a coarser martensitic microstructure in the Q-P-treated material.
| Identifer | oai:union.ndltd.org:DRESDEN/oai:qucosa:de:qucosa:34779 |
| Date | 31 July 2019 |
| Creators | Härtel, Sebastian, Awiszus, Birgit, Graf, Marcel, Nitsche, Alexander, Böhme, Marcus, Wagner, Martin F.-X., Jirkova, Hana, Masek, Bohuslav |
| Publisher | MDPI AG |
| Source Sets | Hochschulschriftenserver (HSSS) der SLUB Dresden |
| Language | English |
| Detected Language | English |
| Type | info:eu-repo/semantics/publishedVersion, doc-type:article, info:eu-repo/semantics/article, doc-type:Text |
| Rights | info:eu-repo/semantics/openAccess |
| Relation | 2075-4701, 577, 10.3390/met9050577, info:eu-repo/grantAgreement/Deutsche Forschungsgemeinschaft/Open Access Publizieren/392676956/ |
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