钛合金板料激光曲线弯曲及热辐射对其组织性能的影响  

CURVED LASER BENDING OF TITANIUM ALLOY SHEETS AND EFFECTS OF HEAT RADIATION ON ITS MICROSTRUCTURE AND PROPERTY

作　　者：陈敦军[1] 向毅斌[1] 吴诗惇[1] 李淼泉[1] 

机构地区：[1]西北工业大学402教研室,西安710072

出　　处：《金属学报》2001年第6期643-646,共4页Acta Metallurgica Sinica

基　　金：国家自然科学基金资助项目 19872055

摘　　要：研究了激光能量密度、路径曲率和扫描次数对 ＴＣ４（Ｔｉ－６Ａｌ－４Ｖ）板料弯曲变形的影响规律同时，分析了热辐射对板 料显微组织和表面硬度的影响．结果表明：（１）存在一个最优的能量密度值使板料一次弯曲所获得的弯曲角度达到峰值；（２）随 路径曲率的增加，弯曲角度减小；（３）第一次扫描以后的扫描次数与弯曲角度呈准线性关系；（４）合适的工艺参数不会导致材料显微组织变化，且激光热辐射对材料表面有淬火效应，使加热区材料表面硬度均有所提高．The effects of laser energy density, path curvature and the number of laser irradiation on bending angle and the effects of heat irradiation of laser on microstructure and property of Ti alloy TC4 are studied. The results are as follows: (1) the laser bending along curved paths has a significant reduction of the bending angle in comparison with the laser bending along linear paths, and the bending angle decreases with increasing path curvature; (2) there is an optimum laser energy density for getting the maximum bending angle after scanning one time; 3) the bending angle after the first irradiation is in proportion to the number of laser irradiation; (4) when laser energy density is over-high, the irradiated surface of titanium alloy sheet will result in the transformation of microstructure and grain growth, but appropriate process parameters will not worsen material microstructure, and the hardness of sheet surface in the irradiated area was improved.

关 键 词：激光曲线弯曲 钛合金板 热辐射 显微组织 表面硬度 

分 类 号：TG136.23[一般工业技术—材料科学与工程] TG166.5[金属学及工艺—合金]