应力三轴度及轧辊凸度对93钨合金板材轧制损伤的影响  

Effect of Roll Convexity and Stress Triaxiality on Rolling Damage of 93 Tungsten Alloy Sheet

作　　者：王卺 赵国群[1] 王广春[1] 袁君[2] 

机构地区：[1]山东大学材料液固结构演变与加工教育部重点实验室,济南250061 [2]中国兵器工业集团第五三研究所,济南250031

出　　处：《材料工程》2014年第10期27-33,共7页Journal of Materials Engineering

摘　　要：依据粉末烧结93钨合金板材轧制过程数值模拟模型，利用DEFORM有限元软件，分析了轧辊凸度对轧制钨板头部开裂的影响及开裂点处应力状态的变化情况。结果表明：随轧辊凸度数值的增加，轧制力和板材宽展呈上升趋势，等效应力和等效应变变化不明显；咬人阶段轧辊凸度绝对值增加使板材头部应力三轴度和开裂的趋势均增大，轧辊凸度取值范围应在—0.02～0.05mm。According to the numerical simulation model of the rolling process of powder sintered 93 tungsten alloy sheet and using the finite software DEFORM, the effect of roll convexity on head crack of the rolled sheet and the principal stress change in the crack point were analyzed. The results show that, with the increase of roll convexities, roll force and the rolled sheet width are on the rise, effec tive stress and effective strain change slightly, stress triaxiality and cracking tendency increase with the increasing of roll convexities absolute value, the selected range of roll convexities is —0.02-0.05mm.

关 键 词：93钨合金板材 轧制 数值模拟 损伤 轧辊凸度 应力三轴度 

分 类 号：TB31[一般工业技术—材料科学与工程]