Effect of Cryogenic Treatment on Distribution of Residual Stress and Wear Resistance of AISI 316 and AISI 304 Stainless Steel

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Sarkarde, Rezvan | 2016

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Type of Document: M.Sc. Thesis
Language: Farsi
Document No: 48183 (08)
University: Sharif University of Technology
Department: Mechanical Engineering
Advisor(s): Farrahi, Gholamhossein
Abstract:
Various methods are used to improve the behavior of steel parts. Cryogenic treatment is one of the prevalent methods used for this purpose. It is not a substitute process but rather a supplement to conventional heat treatment process. In this Study the effect of the minimum temperature and the time of cryogenic treatment on wear resistance and residual stress of stainless steel AISI 316 and AISI 304 were studied. For this purpose conventional heat treatment, deep cryogenic treatment (24, 48 and 72 hours) and shallow cryogenic treatment (5, 10 and 15 hours) were performed on the samples. The wear resistance were measured by Pin-on-disk test according to the standard G99-95 (under the load of 15N, the distance of 500m and the speed of 0.14m/s). For measuring the residual stress, the hole drilling method was performed and also the residual stress was simulated using FE software. Wear resistance of samples were improve by DCT in 48 hours but no specific relationship between the holding time in minimum temperature and wear resistance was observed. The measured and simulated residual stress both show compressive stress on the surface of samples
Keywords:
316 Austenitic Stainless Steel ; Residual Stress ; 304 Austenitic Stainless Steel ; Wear Resistance ; Cryogenic Treatment

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