激光表面重熔对退火70Mn态钢拉伸性能的影响  

Effect of Laser Surface Remelting on the Tensile Properties of Annealed 7oMn Steel

作　　者：张有为 龙日升 张义民[1] 孙伏文 ZHANG You-wei;LONG Ri-sheng;ZHANG Yi-min;SUN Fu-wen(Institute of Equipment Reliability,Shenyang University of Chemical Technology,Liaoning Shenyang 110142,China)

机构地区：[1]沈阳化工大学装备可靠性研究所,辽宁沈阳110142

出　　处：《机械设计与制造》2023年第8期122-125,共4页Machinery Design & Manufacture

基　　金：NSFC-辽宁联合基金重点项目(U1708254);辽宁省自然科学基金面上项目(2019-MS-258);辽宁省教育厅科技项目(LJ2019003)。

摘　　要：为了探究激光表面重熔对退火态70Mn钢拉伸性能的影响,在扫描速率10mm/s、功率400W和氩气保护的条件下,制备了“条纹型”“网格型”和“混合型”图样的重熔拉伸试件;获得了激光重熔区的显微组织、不同图样试件的拉伸性能及其断口微观形貌。试验结果表明“条纹型”和“混合型”重熔图样未对退火态70Mn钢的抗拉强度产生明显影响,而“网格型”重熔图样试件的抗拉强度降低了8.4%;不同重熔图样对屈服强度无明显影响;与光滑试件相比“条纹型”图样对伸长率几乎无影响“网格型”试件的伸长率降低了16.96%“混合型”试件的伸长率降低了9.11%。To study the inluence of laser surface remelting on the tensile properties of annealed 70Mn,three kinds of remeled pat-tern:“stripe”,"grid"and"mixed",were produced using the fllving parameters ie.scanning rate,10mm/s.laser pouver。400W and opening argon gas.The microstrucure,the tensile properties and fracture morphology of samples wvere researched.The resuls show that"stripe"and"mixed"remelted patterns have no significant efct on the tensile strength,while"grid"patterns can decrease the tensile strength by 8.4%.The ff of all remelted patterns on yield strength is not obrious.Compared with the smooth one,the"stripe"pattern has litle efe on the elongation,the elongation of"grid"is reduced by 16.96%,and the elongation of"mixed"is descended by 9.11%.

关 键 词：70Mn 激光表面重熔 拉伸性能 显微组织 断口形貌 

分 类 号：TH16[机械工程—机械制造及自动化] TH133.3[自动化与计算机技术—计算机应用技术] TP391.9[自动化与计算机技术—计算机科学与技术]