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材料工程  2019, Vol. 47 Issue (6): 152-160    DOI: 10.11868/j.issn.1001-4381.2017.000993
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热处理温度对新型马氏体时效不锈钢微观组织和性能的影响
王飞云, 金建军, 江志华, 王晓震, 胡春文
中国航发北京航空材料研究院, 北京 100095
Effect of heat treatment temperature on microstructure and properties of new maraging stainless steel
WANG Fei-yun, JIN Jian-jun, JIANG Zhi-hua, WANG Xiao-zhen, HU Chun-wen
AECC Beijing Institute of Aeronautical Materials, Beijing 100095, China
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摘要 针对一种以Al作为主要强化元素的新型马氏体时效不锈钢,通过力学性能测试、光学显微镜观察和透射电子显微分析方法,研究不同的热处理温度对实验钢力学性能和微观组织的影响。结果表明:该实验钢的抗拉强度最高可达1876MPa,屈服强度可达1762MPa,具有良好的强韧性配合。固溶处理后形成了具有高密度位错的细小板条马氏体组织,在时效过程中,马氏体基体上弥散析出的NiAl相使其强度得到大幅度的提升。随着时效温度的提高,NiAl析出相颗粒逐渐长大粗化,从而使强度在到达峰值后迅速下降,出现了过时效现象。实验钢经过820℃固溶+(-70℃)冷处理+540℃时效处理后可获得良好的综合力学性能。
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王飞云
金建军
江志华
王晓震
胡春文
关键词 马氏体时效不锈钢Al元素强化NiAl析出相时效处理力学性能    
Abstract:The mechanical properties and microstructure of tested steel strengthened via Al at different solution and aging temperatures were studied by mechanical property test, optical microscope and transmission electron microscope. The results show that the tensile strength and yield strength of tested steel reach up to 1876MPa and 1762MPa respectively, with the higher strength and better match of toughness. Fine lath martensite with high-density dislocations is formed after solution and the precipitation of dispersive NiAl phase from matrix makes the strength greatly improved during the aging. The strength of tested steel decreases rapidly after reaching peak due to the coarsening of particles, namely, overaging phenomenon occurs. The optimum comprehensive mechanical properties of tested steel can be obtained after solution treatment at 820℃, cold treatment at -70℃ and aging treatment at 540℃.
Key wordsmaraging stainless steel    strengthening element Al    NiAl precipitated phase    aging treat-ment    mechanical property
收稿日期: 2017-08-03      出版日期: 2019-06-17
中图分类号:  TG142.1  
通讯作者: 金建军(1963-),男,硕士,研究员,从事高强度结构钢和不锈钢材料的研究工作,联系地址:北京市81信箱72分箱(100095),E-mail:jianjun.jin@biam.ac.cn     E-mail: jianjun.jin@biam.ac.cn
引用本文:   
王飞云, 金建军, 江志华, 王晓震, 胡春文. 热处理温度对新型马氏体时效不锈钢微观组织和性能的影响[J]. 材料工程, 2019, 47(6): 152-160.
WANG Fei-yun, JIN Jian-jun, JIANG Zhi-hua, WANG Xiao-zhen, HU Chun-wen. Effect of heat treatment temperature on microstructure and properties of new maraging stainless steel. Journal of Materials Engineering, 2019, 47(6): 152-160.
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http://jme.biam.ac.cn/CN/10.11868/j.issn.1001-4381.2017.000993      或      http://jme.biam.ac.cn/CN/Y2019/V47/I6/152
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