马氏体时效钢等温时效析出行为

doi:10.13251/j.issn.0254-6051.2022.10.003

金属热处理 ›› 2022, Vol. 47 ›› Issue (10): 15-18.DOI: 10.13251/j.issn.0254-6051.2022.10.003

马氏体时效钢等温时效析出行为

方慧亮¹, 呼陟宇¹, 吕萌¹, 伍健¹, 翟亭亭¹, 薛春江², 王海燕¹

1.内蒙古科技大学材料与冶金学院, 内蒙古包头 014010;
2.内蒙古科技大学工程训练中心, 内蒙古包头 014010

收稿日期:2022-05-06 修回日期:2022-08-04 出版日期:2022-10-25 发布日期:2022-12-15
通讯作者: 王海燕,教授,博士,E-mail:windflower126@163.com
作者简介:方慧亮(1998—),男,硕士研究生,主要研究方向为优势资源先进金属材料研究与开发,E-mail:1595768743@qq.com。
基金资助:
国家自然科学基金(51961030)

Isothermal aging precipitation behavior of maraging steel

Fang Huiliang¹, Hu Zhiyu¹, Lü Meng¹, Wu Jian¹, Zhai Tingting¹, Xue Chunjiang², Wang Haiyan¹

1. School of Materials and Metallurgy, Inner Mongolia University of Science and Technology, Baotou Inner Mongolia 014010, China;
2. Engineering Training Center, Inner Mongolia University of Science and Technology, Baotou Inner Mongolia 014010, China

Received:2022-05-06 Revised:2022-08-04 Online:2022-10-25 Published:2022-12-15

摘要/Abstract

摘要： 以马氏体时效钢为研究对象,将试验钢经900 ℃固溶后,再进行500 ℃等温时效处理,采用光学显微镜、扫描电镜及维氏硬度计表征了时效过程中其显微组织与析出相及硬度变化规律,在此基础上,分析了时效工艺对马氏体时效钢显微硬度变化的影响。结果表明,在时效初期,试验钢硬度增幅明显,并于12 h时达到峰值,为585 HV30。随着时效时间进一步延长,试验钢进入过时效状态,硬度开始缓慢下降。试验钢基体由板条马氏体与残留奥氏体组成,且基体分布着细小弥散的第二相颗粒。时效0.5 h时,析出相尺寸为5~10 nm,当时效达到12 h时,析出相缓慢长大至20~25 nm。

关键词: 马氏体时效钢, 时效, 析出, 硬化

Abstract: A maraging steel was solution treated at 900 ℃ and then isothermal aged at 500 ℃. The change of microstructure, precipitates and hardness of the tested steel during aging was characterized by means of optical microscope, scanning electron microscope and Vickers hardness tester. On this basis, the effect of aging process on hardening behavior of the tested steel was analyzed. The results show that the hardness of the tested steel increases obviously in the early stage of aging, and reaches the peak value of 585 HV30 when aging for 12 h. With the aging time further extended, the tested steel enters the over-aging state, and the hardness begins to decline slowly. The tested steel matrix is composed of lath martensite and retuined austenite, and the second phase particles are distributed in the matrix. When aging for 0.5 h, the precipitate size is about 5-10 nm; and when aging for 12 h, the precipitate grows slowly to 20-25 nm.

Key words: maraging steel, aging, precipitation, hardening

中图分类号:

TG142.1

方慧亮, 呼陟宇, 吕萌, 伍健, 翟亭亭, 薛春江, 王海燕. 马氏体时效钢等温时效析出行为[J]. 金属热处理, 2022, 47(10): 15-18.

Fang Huiliang, Hu Zhiyu, Lü Meng, Wu Jian, Zhai Tingting, Xue Chunjiang, Wang Haiyan. Isothermal aging precipitation behavior of maraging steel[J]. Heat Treatment of Metals, 2022, 47(10): 15-18.

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马氏体时效钢等温时效析出行为

Isothermal aging precipitation behavior of maraging steel

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