冷轧压下量对2618合金拉伸及热稳定性能的影响  

Effect of cold rolling pressure on tensile and thermal stability of 2618 alloy

作　　者：王雨航 王芝秀 顾晓彤[1] 李海 WANG Yuhang;WANG Zhixiu;GU Xiaotong;LI Hai(School of Materials Science and Engineering,Changzhou University,Changzhou 213164,China;Jiangsu Key Laboratory of Materials Surface Science and Technology,Changzhou University,Changzhou 213164,China)

机构地区：[1]常州大学材料科学与工程学院,江苏常州213164 [2]材料表面科学与技术省高校重点实验室(常州大学),江苏常州213164

出　　处：《常州大学学报(自然科学版)》2025年第2期1-9,共9页Journal of Changzhou University:Natural Science Edition

基　　金：国家自然科学基金资助项目(52171029,51671038)。

摘　　要：采用拉伸测试、光学显微镜(OM)、X射线衍射(XRD)及透射电镜(TEM),研究了2618合金经530℃,2 h固溶处理,15%~60%压下量冷轧,180℃,4 h时效处理以及200~250℃,120 h热暴露后的拉伸性能。结果表明:合金经冷轧、时效处理后具有高强度及良好的延伸率;200℃热暴露时,合金稳定性能高于未变形合金,且抗拉强度显著提高,源于位错强化和析出强化;225,250℃热暴露时,合金热稳定性下降,15%~30%压下量热暴露合金抗拉强度高于未变形热暴露合金,位错强化增量高于析出强化的下降幅度。15%压下量冷轧、时效处理合金经200℃,120 h热暴露后的抗拉强度为500 MPa,屈服强度为438 MPa,延伸率为8.1%。The tensile properties of 530℃,2 h solid solution treatment,15%—60%pressure cold rolling,180℃,4 h aging treatment and 200—250℃,120 h heat exposure 2618 alloy were investigated by tensile test,optical microscopy(OM),X-ray diffraction(XRD)and transmission electron microscopy(TEM).The results show that the alloy has high strength and good elongation after cold rolling and aging;when 200℃heat exposed,the stability of the alloy is higher than that of the undeformed alloy,and the tensile strength is significantly increased,due to dislocation strengthening and precipitation strengthening;when 225,250℃heat exposed,the thermal stability of the alloy decreases,the tensile strength of 15%—30%pressure is higher than that of the undeformed thermal exposed alloy,and the increase in dislocation strengthening is higher than the decrease in precipitation strengthening.The tensile strength,yield strength and elongation of 15%pressed cold rolled after thermal exposure 200℃,120 h are 500 MPa,438 MPa and 8.1%,respectively.

关 键 词：2618合金 冷轧压下量 热暴露 拉伸性能 热稳定性 显微组织 

分 类 号：TG146.21[一般工业技术—材料科学与工程]