微合金化8630钢高温热压缩变形行为研究

刘忠煜1,陈雨琳1,柳志铖1,段修刚2,董治中1

钢铁研究学报 ›› 2023, Vol. 35 ›› Issue (12) : 1548-1559.

钢铁研究学报 ›› 2023, Vol. 35 ›› Issue (12) : 1548-1559. DOI: 10.13228/j.boyuan.issn1001-0963.20230006
材料研究

微合金化8630钢高温热压缩变形行为研究

  • 刘忠煜,陈雨琳,柳志铖,段修刚,董治中
作者信息 +

Research on high temperature hot compression deformation behavior of microalloyed 8630 steel for deepsea oil and gas wellhead forgings

  • LIU Zhongyu,CHEN Yulin,LIU Zhicheng,DUAN Xiugang,DONG Zhizhong
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摘要

摘要:在AISI8630钢基础上制备了一种微合金化8630钢。在变形温度为850~1200℃、应变速率为0.01~10s-1、压缩量为60%条件下,使用Gleeble-3500热模拟试验机进行单向热压缩试验。分析微合金化8630钢在不同条件下的应力应变曲线及组织变化,确立试验钢的热变形本构方程,并基于动态材料模型(DMM)模型建立热加工图。结果表明:在试验过程中,当材料变形程度一定时,流变应力随着变形温度的升高和应变速率的降低而减小。通过修正拟合,材料热激活能为409.036kJ/mol,预测理想变形条件温度为1125~1200℃,应变速率为0.01~0.1s-1。

Abstract

Abstract: A microalloyed 8630 steel was independently designed on the basis of AISI 8630 steel. Unidirectional hot compression tests were carried out using a Gleeble3500 thermal simulation tester at a deformation temperature of 850-1200℃, a strain rate of 0.01-10s-1, and the compression is 60%. The stressstrain curves and microstructural changes of microalloyed 8630 steel at different deformation temperatures and deformation rates were analyzed. The constitutive equation for thermal deformation of the experimental steel is established, and a thermal work diagram is built up based on the dynamic material model(DMM). The results show that during hot compression deformation, the flow stress decreases with increasing deformation temperature and decreasing deformation rate when the degree of deformation of the material is constant. The thermal activation energy of the material is 409.036kJ/mol, the predicted ideal deformation temperature is 1125-1200℃ and the deformation rate is 0.01-0.1s-1 by the modified fit.

关键词

关键词:微合金化8630钢 / 热变形 / 流变应力 / 本构方程 / 热加工图

Key words

Key words:microalloyed 8630 steel / thermal deformation / flow stress / constitutive equation / thermal processing

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刘忠煜1,陈雨琳1,柳志铖1,段修刚2,董治中1. 微合金化8630钢高温热压缩变形行为研究[J]. 钢铁研究学报, 2023, 35(12): 1548-1559 https://doi.org/10.13228/j.boyuan.issn1001-0963.20230006
LIU Zhongyu1,CHEN Yulin1,LIU Zhicheng1,DUAN Xiugang2,DONG Zhizhong1. Research on high temperature hot compression deformation behavior of microalloyed 8630 steel for deepsea oil and gas wellhead forgings[J]. Journal of Iron and Steel Research, 2023, 35(12): 1548-1559 https://doi.org/10.13228/j.boyuan.issn1001-0963.20230006

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