稀土Ce对4Cr5MoSiV1钢热变形行为的影响  

Effect of Rare Earth Ce on the hot deformation behavior of 4Cr5MoSiV1 steel

作　　者：夏明 赵莉萍[1] 杨礼林 陈朔 陈学敏 徐祺昊 XIA Ming;ZHAO Liping;YANG Lilin;CHEN Shuo;CHEN Xuemin;XU Qihao(Materials and Metallurgy School,Inner Mongolia University of Science and Technology,Baotou 014010,China)

机构地区：[1]内蒙古科技大学材料与冶金学院,内蒙古包头014010

出　　处：《内蒙古科技大学学报》2023年第3期243-247,共5页Journal of Inner Mongolia University of Science and Technology

基　　金：内蒙古自治区科技创新引导奖励资金资助项目(201/090262001);内蒙古科技大学创新基金资助项目(2019QDL⁃B05).

摘　　要：利用Gleeble⁃3800热模拟试验机对不含稀土和含稀土的4Cr5MoSiV1钢进行高温热变形模拟试验,变形温度为1100~1200℃,变形速率为0.1~3 s^(-1),总变形程度为60%.根据得到的真应力⁃应变数据,对比试验钢在应变量为30%时的变形抗力值,并分析变形后的显微组织.结果表明:4Cr5MoSiV1钢在研究的试验条件下均发生了动态再结晶;相同变形条件下,含稀土4Cr5MoSiV1钢的变形抗力比不含稀土4Cr5MoSiV1钢增大12~36 MPa;稀土Ce的添加细化了再结晶晶粒,提高了试验钢变形抗力,推迟了动态再结晶的发生.稀土含量为0.0120%的4Cr5MoSiV1钢适宜的热加工参数为变形温度1100℃,变形速率0.1 s^(-1).The high temperature thermal deformation simulation of 4Cr5MoSiV1 steel with or without Rare Earth was carried out by Gleeble⁃3800 thermal simulation test machine.The deformation temperature was 1100~1200℃,the deformation rate was 0.1~3 s^(-1),and the total deformation was 60%.According to the obtained true stress⁃strain data,the deformation resistance value of the test steel with the strain of 30%was compared,and the microstructure after deformation was analyzed.The results show that dy⁃namic recrystallization of 4Cr5MoSiV1 steel occurs under the experimental conditions of this study;Under the same deformation condi⁃tions,the deformation resistance of 4Cr5MoSiV1 steel containing Rare Earth is 12~36 MPa higher than that of 4Cr5MoSiV1 steel with⁃out Rare Earth;the addition of Rare Earth Ce refines the recrystallized grains,improves the deformation resistance of the test steel and delayed the occurrence of dynamic recrystallization.Deforming at 1000℃and at a rate of 0.1 s^(-1)has been determined as the best hot working parametevs for 4Cr5MoSiV1 steel with a Rare Earth content of 0.0120%.

关 键 词：稀土Ce 4CR5MOSIV1钢 热变形行为 显微组织 

分 类 号：TG142.1[一般工业技术—材料科学与工程]