东北大学学报（自然科学版）

东北大学学报(自然科学版) ›› 2006, Vol. 27 ›› Issue (11): 1236-1239.DOI: -

• 论著 • 上一篇    下一篇

微量元素对304L不锈钢Hall-Petch关系式的影响

王立军;王凯;任海鹏;刘春明;   

  1. 东北大学材料与冶金学院;东北大学材料与冶金学院;东北大学材料与冶金学院;东北大学材料与冶金学院 辽宁沈阳110004;辽宁沈阳110004;辽宁沈阳110004;辽宁沈阳110004
  • 收稿日期:2013-06-23 修回日期:2013-06-23 出版日期:2006-11-15 发布日期:2013-06-23
  • 通讯作者: Wang, L.-J.
  • 作者简介:-
  • 基金资助:
    教育部博士点基金资助项目(20030145025);;

Effects of microalloying elements on hall-petch relations of 304L austenitic stainless steel

Wang, Li-Jun (1); Wang, Kai (1); Ren, Hai-Peng (1); Liu, Chun-Ming (1)   

  1. (1) School of Materials and Metallurgy, Northeastern University, Shenyang 110004, China
  • Received:2013-06-23 Revised:2013-06-23 Online:2006-11-15 Published:2013-06-23
  • Contact: Wang, L.-J.
  • About author:-
  • Supported by:
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摘要： 以304L奥氏体不锈钢为基础,熔炼了4种添加不同微量元素的实验钢·实验钢热轧板冷轧后进行不同温度的再结晶退火处理以使晶粒尺寸在一定范围内变化,然后进行不同温度的均一化热处理以消除前面热处理带来晶界偏聚量的差异,最后进行力学性能测试、显微组织观察和晶粒尺寸统计,将所得数据处理成Hall-Petch关系式·通过对不同成分和不同热处理制度的对比,研究了微量元素Nb,B,C,N对304L不锈钢Hall-Petch的影响规律·结果表明:微量C,N和B对奥氏体不锈钢的Hall-Petch关系式中的σ0影响不大,N和B可以提高细晶强化系数ky·微量Nb可以与部分C,N结合形成Nb(C,N),在700℃均一化...

关键词: 304L奥氏体不锈钢, Hall-Petch关系式, 细晶强化, 微量元素, Nb, B, N

Abstract: Four experimental specimens were prepared from molten 304 L austenitic stainless steel, with different trace elements added in it. After cold rolling and recrystallization annealing at different temperatures to cause grain size distribution change to a certain extent, those specimens were annealed again for homogeneity at different temperatures to eliminate the different grain boundary segregation resulting from different annealing temperatures. Then, their mechanical properties were tested with their microstructures observed for grain size statistics, thus getting the Hall-Petch relation through data processing. The effects of such microalloying elements as Nb, B, C and N on Hall-Petch relation were investigated by comparing the results of different specimens and heat-treatments. Conclusions are therefore drawn that: without Nb addition, the trace elements C, N and B have little influence on σ0 in Hall-Petch relation, but N or B can increase grain refinement strengthening coefficient ky. Once Nb is added in the austenitic stainless steel, it compounds with the elements C and N to form the carbonitride of Nb, which has no obvious influence on σ0 but increases ky when reannealing the specimens for homogeneity at 700°C. However, it decreases σ0 but increases ky at 500°C.

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