A dissertation submitted to the Faculty of Engineering, University of the
Witwatersrand, Johannesburg, in fulfilment of the requirements for the degree
of Master of Science in Engineering.
,Department of Metallurgy and Materials Engineering
University of the Witwatersrand
Johannesburg, 1990. / An instrumented hot deformation simulator was desLgned, cons'.:ructedand
commissioned at Iscor's Pilot Plant. A modified servohydraulic machine,
using plane strain compression, simulated industrial plate rolling
schedules. The simulation test included induction heating, multiple pass
plane strain compression and either air cooling or quenching. The
movement of the specimen between the different test stages was computer
controlled. Accurate control of specimen temperature, strain atrain rate
and interpass hold times was achieved by means of sophisticated data
acquds i+Lon equipment. A comput er programme was written to simulate the
hot. rolling of plate in t erms of roll sepa ratIng f.orces, ffiE.\tallurgical
changes during deformation as well as the final microstructure and
mechanical properties of SGa carbon manganese steel. Multiple linear
regression was pe.rformed on the results obtained from mUlti-pass plane
strain compression tests. It was found that themical composition, finish
temperature and finish strain were the most important process parameters
affecting yield strength and impact energy of air cooled place. A
computer model was developed to simulate the temperature distribution in
the deformation zone of a plane strain compressLon specimen at any point
during or after a mUlti-pass test.
| Identifer | oai:union.ndltd.org:netd.ac.za/oai:union.ndltd.org:wits/oai:wiredspace.wits.ac.za:10539/20455 |
| Date | 10 June 2016 |
| Creators | Banks, Kevin Mark |
| Source Sets | South African National ETD Portal |
| Language | English |
| Detected Language | English |
| Type | Thesis |
| Format | application/pdf |
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