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粉末冶金材料科学与工程  2018, Vol. 23 Issue (5): 475-481    
  工艺技术 本期目录 | 过刊浏览 | 高级检索 |
再结晶分布对316L不锈钢力学性能的影响
卢嘉欣, 陈查坤, 方铁辉
湖南大学 材料科学与工程学院,长沙 410082
Effects of distribution of recrystalline grains on mechanical properties of 316L stainless steel
LU Jiaxin, CHEN Zhakun, FANG Tiehui
College of Materials Science and Engineering, Hunan University, Changsha 410082, China
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摘要 对大应变量冷轧316L不锈钢分别进行电阻炉等时退火和电磁感应加热处理,获得2种不同的再结晶分布,观察与测试等时退火与电磁感应加热后合金的组织与力学性能,研究再结晶分布对316L不锈钢力学性能的影响。结果表明,等时退火后的合金,再结晶总体上随机均匀分布;而电磁感应加热获得了再结晶由表及里逐渐减少的梯度分布。这两类退火结构具有相同的再结晶体积分数和类似的强塑性匹配,再结晶的分布对316L不锈钢的强塑性没有显著影响。退火后316L不锈钢中的再结晶和纳米孪晶形成的应变传递网络是拉伸塑性的主要来源。该网络协调塑性变形的能力对再结晶的分布不敏感,从而消除再结晶分布对合金性能的影响。
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卢嘉欣
陈查坤
方铁辉
关键词 再结晶分布力学性能316L不锈钢反向梯度纳米结构电磁感应加热    
Abstract:Two different distributions of recrystalline grains were obtained on a cold-rolled 316L stainless steel through isochronal annealing (IA) and electromagnetic induction heating (EMIH), respectively. The microstructure and mechanical properties of the alloys after isothermal annealing and electromagnetic induction heating were observed and tested. The effects of recrystallization distribution on the mechanical properties of 316L stainless steel were studied. The results show that, the recrystalline grains are uniformly distributed in the IA sample. While a gradient distribution is obtained in the EMIH sample where the volume fraction and grain size of recrystalline grains are declined with depths increased. There are same volume fraction of recrystalline grains and similar strength-ductility synergy in the IA and EMIH samples. The difference in the distribution of recrystalline grains has no significant effects on the mechanical properties of 316L stainless steel. The tensile ductility of the annealed 316L stainless steel is mainly depended on the network formed by the recrystallization and nanotwins. The deformation ability of the network is insensitive to the distribution of the recrystalline grains. Therefore, the effects of the recrystallization distribution on the mechanical properties are suppressed in 316L stainless steel.
Key wordsrecrystallization distribution    mechanical property    316L stainless steel    inverse gradient nanograined structure    electromagnetic induction heating
收稿日期: 2018-02-16      出版日期: 2019-07-12
ZTFLH:  TG142.1/2  
基金资助:国家青年科学基金项目(751229107); 中央高校基本科研业务费资助项目(531107040867)
通讯作者: 方铁辉,助理教授,博士。电话:13755078105;E-mail: thfang@hnu.edu.cn   
引用本文:   
卢嘉欣, 陈查坤, 方铁辉. 再结晶分布对316L不锈钢力学性能的影响[J]. 粉末冶金材料科学与工程, 2018, 23(5): 475-481.
LU Jiaxin, CHEN Zhakun, FANG Tiehui. Effects of distribution of recrystalline grains on mechanical properties of 316L stainless steel. Materials Science and Engineering of Powder Metallurgy, 2018, 23(5): 475-481.
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