金属热处理 ›› 2020, Vol. 45 ›› Issue (12): 97-101.DOI: 10.13251/j.issn.0254-6051.2020.12.018

• 工艺研究 • 上一篇    下一篇

固溶及时效温度对沉淀硬化模具钢10Cr3Mo3NiCuAl硬度及组织的影响

楚宝帅1, 吴小艳2, 王海军3, 张锦文1, 陈建礼1   

  1. 1.山西太钢不锈钢股份有限公司 技术中心, 山西 太原 030003;
    2.山西太钢工程技术有限公司, 山西 太原 030009;
    3.安徽工业大学 冶金工程学院, 安徽 马鞍山 243032
  • 收稿日期:2020-07-03 出版日期:2020-12-25 发布日期:2021-01-14
  • 作者简介:楚宝帅(1991—),男,工程师,硕士,主要研究方向为模具钢产品开发及质量管理,E-mail:chubs@tisco.com.cn

Effects of solution treatment and aging temperature on hardness and microstructure of precipitation hardening die steel 10Cr3Mo3NiCuAl

Chu Baoshuai1, Wu Xiaoyan2, Wang Haijun3, Zhang Jinwen1, Chen Jianli1   

  1. 1. Technology Center, Shanxi Taigang Stainless Steel Co., Ltd., Taiyuan Shanxi 030003, China;
    2. Shanxi Taigang Engineering Technology Co., Ltd., Taiyuan Shanxi 030009, China;
    3. School of Metallurgical Engineering, Anhui University of Technology, Ma'anshan Anhui 243032, Chian
  • Received:2020-07-03 Online:2020-12-25 Published:2021-01-14

摘要: 通过热力学分析计算,结合硬度测试、光学和扫描电镜观察研究了固溶温度及时效温度对10Cr3Mo3NiCuAl钢组织和硬度的影响。结果表明:试验钢在950 ℃固溶时,组织均匀细小,主要为板条马氏体+少量残留奥氏体,碳化物基本溶于基体,此时硬度较高,随固溶温度升高,马氏体板条出现粗化现象;试验钢在520~540 ℃时效处理时,基体中析出大量金属间化合物Ni3Al,起到了沉淀强化作用,硬度较高,随时效温度升高,组织中出现回火索氏体,导致硬度快速下降。推荐最佳固溶温度为950 ℃,最佳时效温度为520~540 ℃。

关键词: 沉淀硬化, 塑料模具钢, 固溶处理, 时效, 组织, 硬度

Abstract: Effects of solution treatment and aging temperature on the microstructure and hardness of 10Cr3Mo3NiCuAl steel were studied by thermodynamic calculation, hardness test, metallography and scanning electron microscopy observation. The results show that when solution treated at 950 ℃, the tested steel is of uniform and fine microstructure with relative high hardness, mainly consisting of lath martensite and a small amount of retained austenite, and the carbides are basically dissolved in the matrix. With the increase of solution treatment temperature, the martensite lath coarsens. During aging at 520-540 ℃, a large amount of intermetallic compound Ni3Al is precipitated from the matrix acting for precipitation strengthening, and the hardness reaches a higher level. With the increase of aging temperature, tempered sorbite appears in the microstructure, resulting in a rapid decrease in hardness. It is recommended that the optimal solution treatment temperature is 950 ℃ and the optimal aging temperature range is 520-540 ℃.

Key words: precipitation hardening, plastic die steel, solution treatment, aging, microstructure, hardness

中图分类号: