星箭分离用00Ni18Co7Mo5Ti钢包带的热处理工艺

doi:10.13251/j.issn.0254-6051.2023.02.029

金属热处理 ›› 2023, Vol. 48 ›› Issue (2): 189-194.DOI: 10.13251/j.issn.0254-6051.2023.02.029

星箭分离用00Ni18Co7Mo5Ti钢包带的热处理工艺

王萍, 田少鲲, 朱宏伟, 杨堃, 金圆平, 王淑青, 黄艳军, 朱靖

首都航天机械有限公司, 北京 100076

收稿日期:2022-09-29 修回日期:2022-12-25 出版日期:2023-02-25 发布日期:2023-03-22
通讯作者: 田少鲲,硕士,E-mail:1530968210@qq.com
作者简介:王萍(1972—),女,工程师,主要研究方向为金属材料热处理,E-mail:wangzzf.1999@sohu.com。

Heat treatment process of 00Ni18Co7Mo5Ti steel for belting of star arrow relief lock

Wang Ping, Tian Shaokun, Zhu Hongwei, Yang Kun, Jin Yuanping, Wang Shuqing, Huang Yanjun, Zhu Jing

Capital Aerospace Machinery Co., Ltd., Beijing 100076, China

Received:2022-09-29 Revised:2022-12-25 Online:2023-02-25 Published:2023-03-22

摘要/Abstract

摘要： 以00Ni18Co7Mo5Ti马氏体时效硬化不锈钢为研究对象,通过万能试验机、洛氏硬度计研究了不同时效温度下,钢的强度及伸长率的变化规律。从机理上分析了钢的强度随时效温度升高而不断增加,并在500 ℃左右达到峰值的原因为Ni₃Ti、Ni₃Mo等弥散相的析出;随着时效温度继续提高,钢的强度逐渐降低、而伸长率逐渐提高的原因为逆转奥氏体含量的增多。同时,通过试验及机理分析,在保证钢的强度不会大幅降低的前提下,适当提高时效温度或延长时效时间,均可以通过增加逆转奥氏体的含量而提高钢的伸长率。此时,钢的显微组织主要为马氏体,同时存在少量的逆转奥氏体,主要强化相为Ni₃Ti、Ni₃Mo等弥散相。

关键词: 马氏体时效硬化不锈钢, 时效处理, 逆转奥氏体, 强度, 伸长率

Abstract: The strength and elongation of the 00Ni18Co7Mo5Ti maraging hardened stainless steel at different aging temperatures were studied by means of universal testing machine and Rockwell hardness tester. The analyses from mechanism show that the strength of the steel increases with the increase of aging temperature, and reaches the peak value at about 500 ℃ because of the precipitation of Ni₃Ti and Ni₃Mo dispersive phases. As the temperature continues to increase, the strength of the steel gradually decreases, while the elongation gradually increases due to the increase of reversed austenite. At the same time, the experiments and mechanism analysis show that on the premise that the strength of the steel does not be greatly reduced, appropriately increasing the aging temperature or prolonging the aging time can increase the elongation of the steel by increasing the content of reversed austenite, where the microstructure of the steel is mainly martensite and a small amount of reversed austenite, and the main strengthening phases are Ni₃Ti, Ni₃Mo and other dispersed phases.

Key words: maraging hardening stainless steel, aging treatment, reversed austenite, strength, elongation

中图分类号:

TG161

王萍, 田少鲲, 朱宏伟, 杨堃, 金圆平, 王淑青, 黄艳军, 朱靖. 星箭分离用00Ni18Co7Mo5Ti钢包带的热处理工艺[J]. 金属热处理, 2023, 48(2): 189-194.

Wang Ping, Tian Shaokun, Zhu Hongwei, Yang Kun, Jin Yuanping, Wang Shuqing, Huang Yanjun, Zhu Jing. Heat treatment process of 00Ni18Co7Mo5Ti steel for belting of star arrow relief lock[J]. Heat Treatment of Metals, 2023, 48(2): 189-194.

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星箭分离用00Ni18Co7Mo5Ti钢包带的热处理工艺

Heat treatment process of 00Ni18Co7Mo5Ti steel for belting of star arrow relief lock

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