退火温度对ECAP变形高氮奥氏体不锈钢力学性能的影响

doi:10.13251/j.issn.0254-6051.2021.11.013

金属热处理 ›› 2021, Vol. 46 ›› Issue (11): 84-89.DOI: 10.13251/j.issn.0254-6051.2021.11.013

退火温度对ECAP变形高氮奥氏体不锈钢力学性能的影响

侯俊峰^1,2, 徐旺^1,2, 张明旭^1,2, 李涌泽³, 董福元^1,2

1.北方民族大学材料科学与工程学院, 宁夏银川 750021;
2.北方民族大学省部共建粉体材料与特种陶瓷重点实验室, 宁夏银川 750021;
3.辽宁鞍山鞍钢集团工程技术有限公司, 辽宁鞍山 114000

收稿日期:2021-06-06 出版日期:2021-11-25 发布日期:2021-12-08
通讯作者: 董福元,讲师,博士,E-mail:fydong@alum.imr.ac.cn
作者简介:侯俊峰(1978—),男,高级工程师,博士,主要研究方向为功能陶瓷、稀有高熔点合金,E-mail:hou8635@yeah.net
基金资助:
北方民族大学校级重点项目(KJ201901);宁夏自然科学基金(2020AAC03249);国家自然科学基金(51901002)

Effect of annealing temperature on mechanical properties of ECAP high-nitrogen austenitic stainless steel

Hou Junfeng^1,2, Xu Wang^1,2, Zhang Mingxu^1,2, Li Yongze³, Dong Fuyuan^1,2

1. School of Materials Science and Engineering, North Minzu University, Yinchuan Ningxia 750021, China;
2. Key Laboratory of Powders & Advanced Ceramics, North Minzu University, Yinchuan Ningxia 750021, China;
3. Anshan Steel Group Engineering Technology Co., Ltd., Anshan Liaoning 114000, China

Received:2021-06-06 Online:2021-11-25 Published:2021-12-08

摘要/Abstract

摘要： 为研究等通道转角挤压(ECAP)+退火对高氮钢力学行为的影响,室温条件下对高氮钢进行1道次ECAP变形,之后分别在700、800、850、900 ℃下对不同N含量的试验钢进行退火处理,分析其力学性能变化规律。结果表明:高氮钢随着退火温度的升高,屈服强度和抗拉强度整体上呈下降的趋势,塑性随退火温度的升高而上升;不同状态高氮钢的抗拉强度与均匀延伸率之间都呈现了传统的强塑性之间的矛盾关系,随N含量的增加,呈现强度和均匀延伸率同步提高的趋势;高氮钢ECAP+低温退火后的拉伸断口呈现沿晶断裂形貌,随N含量的升高,沿晶断裂倾向更加明显。

关键词: 高氮奥氏体不锈钢, 等通道转角挤压变形(ECAP), 退火温度, 力学性能

Abstract: In order to study the effect of equal channel angular pressing (ECAP)+ annealing process on mechanical behavior of the high-nitrogen steel, single pass ECAP deformation was performed on high-nitrogen steel at room temperature, and then the steel with different N contents was annealed at 700, 800, 850, 900 ℃, respectively, to analyze the change rules of mechanical properties. The results show that the yield strength and tensile strength of the high-nitrogen steel decrease on the whole with the increase of annealing temperature, while the plasticity increases. The tensile strength and uniform elongation of the high-nitrogen steel at different annealing temperatures show the traditional inverse relationship, and the strength and uniform elongation increase synchronously with the increase of N content. The tensile fracture morphology of high nitrogen steel ECAP + annealed at low temperatures is intergranular, and intergranular fracture tendency is more obvious with the increase of N content.

Key words: high-nitrogen austenitic stainless steel, equal channel angular pressing (ECAP), annealing temperature, mechanical properties

中图分类号:

侯俊峰, 徐旺, 张明旭, 李涌泽, 董福元. 退火温度对ECAP变形高氮奥氏体不锈钢力学性能的影响[J]. 金属热处理, 2021, 46(11): 84-89.

Hou Junfeng, Xu Wang, Zhang Mingxu, Li Yongze, Dong Fuyuan. Effect of annealing temperature on mechanical properties of ECAP high-nitrogen austenitic stainless steel[J]. Heat Treatment of Metals, 2021, 46(11): 84-89.

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退火温度对ECAP变形高氮奥氏体不锈钢力学性能的影响

Effect of annealing temperature on mechanical properties of ECAP high-nitrogen austenitic stainless steel

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