金属热处理 ›› 2021, Vol. 46 ›› Issue (5): 171-174.DOI: 10.13251/j.issn.0254-6051.2021.05.028

• 工艺研究 • 上一篇    下一篇

含氮耐蚀模具钢TM420的组织与性能

陈建礼, 张晓琨, 楚宝帅, 张锦文   

  1. 山西太钢不锈钢股份有限公司技术中心, 山西 太原 030003
  • 收稿日期:2020-10-25 出版日期:2021-05-25 发布日期:2021-07-21
  • 作者简介:陈建礼(1968—),男,正高级工程师,学士,主要研究方向为工模具钢产品和生产工艺研发,E-mail:chenjl@tisco.com.cn。

Microstructure and properties of nitrogen-containing corrosion-resistant die steel TM420

Chen Jianli, Zhang Xiaokun, Chu Baoshuai, Zhang Jinwen   

  1. Technical Center of Shanxi Taigang Stainless Steel Co., Ltd., Taiyuan Shanxi 030003, China
  • Received:2020-10-25 Online:2021-05-25 Published:2021-07-21

摘要: 对含氮耐蚀模具钢TM420不同热处理状态下的硬度、晶粒度、显微组织、力学性能以及耐点蚀性能进行了研究。结果表明:含氮耐蚀模具钢TM420退火后组织主要为铁素体+碳化物,一般不含δ铁素体;相比传统耐蚀模具钢,TM420钢具有更好的淬硬性,预硬态试样具有更好的强韧性和耐点蚀性能;TM420钢具有较宽的淬火及回火区间,且具有较优的回火稳定性,推荐淬火温度区间为980~1060 ℃,预硬化回火温度区间为580~650 ℃。

关键词: 耐蚀模具钢, 淬火, 回火, 力学性能, 耐点蚀性能

Abstract: Hardness, grain size, microstructure, mechanical properties and pitting corrosion resistance of the nitrogen-containing corrosion-resistant die steel TM420 under different heat treatment conditions were studied. The results show that the microstructure of the TM420 steel after annealing is mainly ferrite+carbide, and generally does not contain δ ferrite. Compared with traditional corrosion-resistant die steel, the TM420 steel has better hardenability, and the pre-hardened specimen has better strength and toughness and pitting corrosion resistance. The TM420 steel has a wide quenching and tempering temperature range and excellent tempering stability, the recommended quenching temperature range is 980-1060 ℃, and the pre-hardening tempering temperature range is 580-650 ℃.

Key words: corrosion-resistant die steel, quenching, tempering, mechanical properties, pitting resistance

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