深冷处理后0Cr17Mn17Mo3NiN奥氏体不锈钢的低温冲击性能
Low-Temperature Impact Property of 0Cr17Mn17Mo3NiN Austenitic Stainless Steel after Cryogenic Treatment
摘 要
对深冷处理前后的0Cr17Mn17Mo3NiN奥氏体不锈钢分别进行了低温和常温冲击试验，研究了其冲击性能和断口形貌，分析了冲击断口附近的物相组成和显微组织。结果表明：试验钢的冲击功随着冲击试验温度的降低而减小，断裂方式由韧性断裂逐渐变为脆性断裂，韧脆转变温度约为-122℃；深冷处理能显著提高试验钢在20℃的冲击功，但深冷处理次数和保温时间对冲击韧性的影响不大；试验钢的低温组织稳定性好，低温冲击与深冷处理后均未发生马氏体相变或氮化物析出。
低温韧性
深冷处理
组织稳定性
0Cr17Mn17Mo3NiN austenitic stainless steel
low-temperature toughness
cryogenic treatment
microstructural stability
Abstract
Low-temperature and room temperature impact tests were conducted on 0Cr17Mn17Mo3NiN austenitic stainless steel before and after cryogenic treatment, respectively. The impact property and fracture morphology of the steel were studied and the phase composition and microstructure near the impact fracture were also analyzed. The results show that the impact energy of the tested steel decreased with the fall of impact test temperature, and the fracture mode changed from ductile fracture to brittle fracture. The ductile-brittle transition temperature was about -122℃. The impact energy at 20℃ of the tested steel was improved significantly by the cryogenic treatment, but the cryogenic times and holding time had little influence on the impact toughness. The low-temperature microstructural stability of the tested steel was good. No martensitic transformation and precipitation of nitride were observed after both low-temperature impact and cryogenic treatment.
中图分类号 TG142.2 DOI 10.11973/jxgccl201705006
所属栏目 试验研究
基金项目 国家高技术研究发展计划项目（2012AA03A501）；江苏省高端结构材料重点实验室开放基金资助项目（hsm1402）
收稿日期 2015/12/21
修改稿日期 2017/2/24
网络出版日期
作者单位点击查看
备注徐文慧(1991-),女,安徽滁州人,硕士研究生.
引用该论文: XU Wenhui,XU Guifang,LUO Rui,WU Xiaodong,CHENG Xiaonong. Low-Temperature Impact Property of 0Cr17Mn17Mo3NiN Austenitic Stainless Steel after Cryogenic Treatment[J]. Materials for mechancial engineering, 2017, 41(5): 27～31
徐文慧,徐桂芳,罗锐,吴晓东,程晓农. 深冷处理后0Cr17Mn17Mo3NiN奥氏体不锈钢的低温冲击性能[J]. 机械工程材料, 2017, 41(5): 27～31
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【5】MOON J, HA H Y, LEE T H. Corrosion behavior in high heat input welded heat-affected zone of Ni-free high-nitrogen Fe-18Cr-10Mn-N austenitic stainless steel[J]. Materials Characterization, 2013, 82:113-119.
【6】KARTIK B, VEERABABU R, SUNDARARAMAN M,et al. Effect of high temperature ageing on microstructure and mechanical properties of a nickel-free high nitrogen austenitic stainless steel[J].Materials Science and Engineering A, 2015, 642:288-296.
【7】DU D, FU R, LI Y,et al. Modification of the Hall-Petch equation for friction-stir-processing microstructures of high-nitrogen steel[J]. Materials Science and Engineering A, 2015, 640:190-194.
【8】程晓农, 戴起勋. 奥氏体钢设计与控制[M]. 北京:国防工业出版社,2005.
【9】吴浩. 新型高氮奥氏体不锈钢耐腐蚀性能研究[D]. 镇江:江苏大学,2015.
【10】戴起勋, 火树鹏. 含氮奥氏体钢的穿晶脆断[J]. 机械工程学报, 1994, 30(3):14-18.
【11】戴起勋,火树鹏,陈康敏.高锰奥氏体钢超低温拉伸特性[J].钢铁研究学报, 1995,7(4):40-44.
【12】DAI Q X, HUO S P. Deformation induced microstructure of high Mn austenitic steels[J]. J Mater Sci Tech, 1993,30(3):310-312.
【13】袁志钟, 戴起勋, 程晓农, 等. 高氮奥氏体钢的CVN低温冲击断裂研究[J]. 江苏大学学报(自然科学版), 2004, 25(3):247-251.
【14】彭菲菲,康凤,舒大禹,等. 深冷处理技术在不锈钢及铝合金中的应用[J]. 重庆理工大学学报(自然科学),2014,28(10):56-59.
【15】DAI Q X, WANG A D, CHENG X N,et al. Effect of alloying elements and temperature on strength of cryogenic austenitic steels[J]. Materials Science and Engineering A, 2001, 311(1/2):205-210.
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