Effect of Pre-strain on Low Temperature Gaseous Carburization for 304 Austenitic Stainless Steel
摘 要
采用拉伸试验机对304奥氏体不锈钢进行了不同程度的塑性预应变,然后利用新型低温气体渗碳工艺对其进行渗碳处理,最后通过残余应力仪、X射线衍射仪、铁素体测量仪等分析了预应变对304奥氏体不锈钢低温气体渗碳的影响。结果表明:预应变后304奥氏体不锈钢中发生了马氏体相变,马氏体转变量随着变形程度的增大而增多,当预应变超过15%后马氏体转变量的增加比较显著;预应变几乎不会影响其渗碳层的厚度,且渗碳层中的马氏体转变为扩张奥氏体(γC);预应变不影响304奥氏体不锈钢低温气体渗碳的表面强化效果。
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 (γC). The pre-strain did not affect the surface strengthening of low temperature gaseous carburization for 304 austenitic stainless steel.
中图分类号 TG156.8 DOI 10.11973/jxgccl201705002
所属栏目 试验研究
基金项目 国家自然科学基金资助项目(51475224);江苏省高校自然科学研究项目(14KJA47002)
收稿日期 2015/12/21
修改稿日期 2017/3/17
网络出版日期
作者单位点击查看
备注付明辉(1990-),男,江苏连云港人,硕士研究生.
引用该论文: FU Minghui,GONG Jianming,JIANG Yong,PENG Yawei. Effect of Pre-strain on Low Temperature Gaseous Carburization for 304 Austenitic Stainless Steel[J]. Materials for mechancial engineering, 2017, 41(5): 7~10
付明辉,巩建鸣,姜勇,彭亚伟. 预应变对304奥氏体不锈钢低温气体渗碳的影响[J]. 机械工程材料, 2017, 41(5): 7~10
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【3】赵程. AISI 316奥氏体不锈钢低温PC、PN和PC+PN表面硬化处理[J]. 青岛科技大学学报自然科学版, 2004, 25(4):328-331.
【4】CESCHINI L, MINAK G. Fatigue behaviour of low temperature carburised AISI316L austenitic stainless steel[J]. Surface and Coatings Technology, 2008, 202(9):1778-1784.
【5】高峰,巩建鸣,姜勇,等. 316L奥氏体不锈钢低温气体渗碳后的表面特性[J]. 金属热处理,2014,39(12):102-106.
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【8】FARRELL K, SPECHT E D, PANG J,et al. Characterization of a carburized surface layer on an austenitic stainless steel[J]. Journal of Nuclear Materials, 2005, 343:123-133.
【9】WILLIAMS P C, COLLINS S R. Mechanical design using low-temperature carburization[J]. Solid-State Phase Transformations, 2008,60:27-30.
【10】董伟南,王艳飞,巩建鸣. 塑性预变形对316L奥氏体不锈钢氢脆的影响[J]. 机械工程材料,2014,38(1):23-27.
【11】陈挺,王步美,徐涛,等.奥氏体不锈钢压力容器应变强化技术的发展及国外标准比较[J]. 机械工程材料,2012,36(3):1-4.
【12】李峰,巩建鸣,梁斌,等. 冷加工变形对1Cr18Ni9Ti不锈钢在含溴醋酸溶液中耐腐蚀性能的影响[J]. 机械工程材料,2006,30(9):13-16.
【13】荣冬松,巩建鸣,姜勇,等. 奥氏体金属低温超饱和气体渗碳表面强化试验装置:CN103323355A[P]. 2013.
【14】SAUNDERS F I,WAGONER R H. Forming of tailor-welded blanks[J]. Metallurgical and Materials Transactions A, 1996, 27(9):2605-2616.
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