钛合金剪切旋压残余应力分布规律研究  

Study on Distribution of Residual Stress to Aluminum Alloy by Shear Spinning

作　　者：杨志[1,2] 侯红亮[3] 周文龙[2] 

机构地区：[1]辽宁工程技术大学材料科学与工程学院,辽宁阜新123000 [2]大连理工大学材料科学与工程学院,辽宁大连116024 [3]北京航空制造工程研究所,北京100024

出　　处：《锻压装备与制造技术》2008年第5期99-101,共3页China Metalforming Equipment & Manufacturing Technology

摘　　要：应用X射线法测定了TC4钛合金残余应力分布,研究了剪切旋压变形温度、进给率和半锥角对残余应力分布的影响规律。试验结果表明,随着旋压进给比的增大,TC4钛合金工件表面残余压应力也随之增大;旋压变形温度对TC4合金表面残余应力的影响不显著,但当温度超过750℃,由于材料屈服强度的显著降低而导致坯料沿壁厚截面的变形不均,使残余应力急剧升高;合适的半锥角有利于降低工件的残余应力,半锥角过小或过大均会导致残余应力的急剧增大。从降低残余应力的角度,TC4合金旋压变形温度范围应控制在600℃～700℃,半锥角在30°～45°,并宜选用较低的进给比。The residual stress distribution of TC4 titanium alloy has been determined by using X-ray spinning. The impact law to distribution of the residual stress has been studied from heating temperature, the feed rate and half-cone in shear spinning process. The results show that with the increase of spinning feed ratio,TC4 titanium surface residual stress also increase. The impact of spinning deformation temperature on the TC4 alloy residual stress is not obvious, but when the temperature exceeds 750℃, as the significant reduction of yield strength resulting in the uneven deformation along cross-section of wall, the residual stress has been dramatically increased. The appropriate semi-cone angle is good for the work piece to reduce the residual stress. Whether semi-cone angle is too small or too large would cause the residual stress increases rapidly. In order to reduce the residual stress, TC4 alloy spinning deformation temperature should be controlled at 600℃-700℃, and the semi-cone angle is between 30°-45°, which also needs the lower feed ratio.

关 键 词：机械制造 剪切旋压 钛合金 残余应力 

分 类 号：TG335.19[金属学及工艺—金属压力加工]