基于摩擦-温度双修正的Maraging250钢热变形行为及热加工图

doi:10.13251/j.issn.0254-6051.2021.05.018

金属热处理 ›› 2021, Vol. 46 ›› Issue (5): 111-117.DOI: 10.13251/j.issn.0254-6051.2021.05.018

基于摩擦-温度双修正的Maraging250钢热变形行为及热加工图

尚丽梅¹, 王春旭¹, 韩顺¹, 厉勇¹, 庞学东², 李建新², 杨超³

1.钢铁研究总院特殊钢研究所, 北京 100081;
2.抚顺特殊钢股份有限公司技术中心, 辽宁抚顺 113001;
3.中国航发商用航空发动机有限责任公司, 上海 200241

收稿日期:2021-01-18 出版日期:2021-05-25 发布日期:2021-07-21
通讯作者: 王春旭,教授级高级工程师,博士,E-mail:wangchunxu@nercast.com
作者简介:尚丽梅(1995—),女,硕士研究生,主要研究方向为超高强度钢,E-mail:1539687174@qq.com。
基金资助:
国家重点研发计划(2016YFB0300104)

Hot deformation behavior and processing maps of Maraging250 steel based on friction and temperature double correction

Shang Limei¹, Wang Chunxu¹, Han Shun¹, Li Yong¹, Pang Xuedong², Li Jianxin², Yang Chao³

1. Institute of Special Steels, Central Iron and Steel Research Institute, Beijing 100081, China;
2. Technology Center, Fushun Special Steel Co., Ltd., Fushun Liaoning 113001, China;
3. AECC Commorcial Aircraft Engine Co., Ltd., Shanghai 200241, China

Received:2021-01-18 Online:2021-05-25 Published:2021-07-21

摘要/Abstract

摘要： 采用Gleeble-3800热模拟试验机,通过热压缩试验研究了变形温度900~1200 ℃、应变速率0.001~10.0 s^-1时,Maraging250钢的热变形行为,综合考虑摩擦效应和变形热效应,对流变应力曲线进行摩擦修正和温度修正,建立双修正条件下的Maraging250钢本构方程和热加工图,并针对真应变为1.2的热加工图分析了试验钢在不同变形条件下的微观组织变化。结果表明,在相同试验条件下,变形温度降低或应变速率升高,摩擦效应对试验钢流变应力影响越显著;变形热仅在低温、高应变速率条件下对流变应力有显著影响。由变形热引起的最大温升约80 ℃、流变应力最大变化约20 MPa。利用双修正的流变应力曲线计算出试验钢的热变形激活能为393.552 02 kJ/mol,并建立了Z参数方程和本构方程,绘制了真应变ε=0.4、0.8和1.2的热加工图。结合微观组织分析,Maraging250钢在1000～1125 ℃、0.001～1.0 s^-1范围内能获得均匀细小的动态再结晶组织,具有较佳的热加工性能。

关键词: Maraging250钢, 应力-应变曲线修正, 本构方程, 热加工图, 微观组织

Abstract: Hot deformation behavior of Maraging250 steel at deformation temperature of 900-1200 ℃ and strain rate of 0.001-10.0 s^-1 was studied by using Gleeble-3800 thermal simulation test machine. The flow stress curves were modified based on friction and temperature double correction, from which the constitutive equation and processing map of the Maraging250 steel were established. The microstructure change of the tested steel under different deformation conditions were analyzed according to the processing map at true strain of 1.2. The results show that, with the decrease of deformation temperature or the increase of strain rate under the same test conditions, the effect of friction on the flow stress of the tested steel is more significant. The deformation heat has a significant effect on the flow stress only under high strain rate and low temperature conditions, which leads to the maximum temperature rise and the maximum flow stress change, being about 80 ℃ and 20 MPa, respectively. Hot deformation activation energy of the tested steel is calculated to be 393.552 02 kJ/mol by using the double-corrected flow stress curves, and the Z parameter equation and constitutive equation are established, the processing maps at true strain ε=0.4, 0.8 and 1.2 are plotted. Combined with the microstructure analysis, it is proposed that the Maraging250 steel can obtain uniform and fine dynamic recrystallization microstructure in the range of 1000-1125 ℃, 0.001-1.0 s^-1, with better hot processing performance.

Key words: Maraging250 steel, stress-strain curve correction, constitutive equation, hot processing map, microstructure

中图分类号:

TG142.1

尚丽梅, 王春旭, 韩顺, 厉勇, 庞学东, 李建新, 杨超. 基于摩擦-温度双修正的Maraging250钢热变形行为及热加工图[J]. 金属热处理, 2021, 46(5): 111-117.

Shang Limei, Wang Chunxu, Han Shun, Li Yong, Pang Xuedong, Li Jianxin, Yang Chao. Hot deformation behavior and processing maps of Maraging250 steel based on friction and temperature double correction[J]. Heat Treatment of Metals, 2021, 46(5): 111-117.

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基于摩擦-温度双修正的Maraging250钢热变形行为及热加工图

Hot deformation behavior and processing maps of Maraging250 steel based on friction and temperature double correction

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