Effect of Pre-strain on Low Temperature Gaseous Carburization for 304 Austenitic Stainless Steel

FU Minghui; GONG Jianming; JIANG Yong; PENG Yawei

doi:10.11973/jxgccl201705002

Materials and Mechanical Engineering > 2017 > 41(5): 7-10,16. > DOI: 10.11973/jxgccl201705002

FU Minghui, GONG Jianming, JIANG Yong, PENG Yawei. Effect of Pre-strain on Low Temperature Gaseous Carburization for 304 Austenitic Stainless Steel[J]. Materials and Mechanical Engineering, 2017, 41(5): 7-10,16. DOI: 10.11973/jxgccl201705002

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Effect of Pre-strain on Low Temperature Gaseous Carburization for 304 Austenitic Stainless Steel

School of Mechanical and Power Engineering, Nanjing Tech University, Nanjing 211816, China

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Received Date: December 20, 2015
Revised Date: March 16, 2017

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Abstract

Plastic pre-strain test was carried out on servo hydraulic tensile testing machine for 304 austenitic stainless steel, then a new low temperature gaseous carburizing process for austenitic stainless steel was used. The residual stress analyzer, X-ray diffraction and ferrite measuring instrument were used to investigate the effect of pre-strain on low temperature gaseous carburization of 304 austenitic stainless steel. The results indicate that martensite transformation was present in 304 austenitic stainless steel after tensile deformation. The volume fraction of martensite increased with increase of deformation degree and it rised obviously when the pre-strain was more than 15%. The thickness of carburized layer was the same regardless of the deformation degree and martensite in carburized layer changed into expansion austenite (γ_C). The pre-strain did not affect the surface strengthening of low temperature gaseous carburization for 304 austenitic stainless steel.
- 304 austenitic stainless steel,
- pre-strain,
- martensite,
- low temperature gaseous carburization

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