金属热处理 ›› 2021, Vol. 46 ›› Issue (7): 43-46.DOI: 10.13251/j.issn.0254-6051.2021.07.008

• 组织与性能 • 上一篇    下一篇

1Cr18Ni11Si4AlTi双相不锈钢的固溶组织与性能

李荣之1, 杨艳芳2, 张全新1   

  1. 1.重庆钢铁研究所有限公司, 重庆 400084;
    2.重庆理工大学 材料科学与工程学院, 重庆 400054
  • 收稿日期:2021-02-25 出版日期:2021-07-25 发布日期:2021-12-10
  • 通讯作者: 张全新,高级工程师,E-mail:neuzqx_cn@sina.com
  • 作者简介:李荣之(1970—),男,高级工程师,硕士,主要研究方向为金属材料研究与应用,E-mail:35803684@qq.com。
  • 基金资助:
    重庆市技术创新与应用发展专项(CSTC2019JSCX-MBDXX0033)

Solution treated microstructure and properties of duplex stainless steel 1Cr18Ni11Si4AlTi

Li Rongzhi1, Yang Yanfang2, Zhang Quanxin1   

  1. 1. Chongqing Iron and Steel Research Institute Co., Ltd., Chongqing 400084, China;
    2. College of Materials Science and Engineering, Chongqing University of Technology, Chongqing 400054, China
  • Received:2021-02-25 Online:2021-07-25 Published:2021-12-10

摘要: 对1Cr18Ni11Si4AlTi双相不锈钢进行了不同温度的固溶热处理试验,对材料的组织和性能与固溶处理之间的关系和影响规律进行了研究。结果表明:随着固溶温度的升高,材料中的析出相逐渐溶解,铁素体含量增加,屈服强度随着铁素体含量增加而提高,材料硬度呈现先降后升的趋势,1050 ℃固溶处理时硬度最低,当固溶温度达到和超过1100 ℃时,其显微组织逐渐粗化,铁素体含量明显增加,材料的屈服强度明显提高。

关键词: 1Cr18Ni11Si4AlTi钢, 固溶, 组织, 铁素体, 力学性能

Abstract: Solution treatment experiments for 1Cr18Ni11Si4AlTi duplex stainless steel were carried out at different temperatures, and the relationship between the microstructure and properties of the steel and the solution treatment was studied. The results show that with the increase of solution treatment temperature, the precipitates in the steel gradually dissolve, the ferrite content increases, the yield strength increases with the increase of ferrite content, the hardness of the steel trends to decrease first and then increase, and reaches the lowest hardness at 1050 ℃. When the solution treatment temperature reaches or exceeds 1100 ℃,the microstructure is coarsened gradually, the ferrite content increases apparently, and the yield strength of the steel is obviously improved.

Key words: 1Cr18Ni11Si4AlTi steel, solid solution treatment, microstructure, ferrite, mechanical properties

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