作　　者： ; ; ;

机构地区： 华南理工大学机械与汽车工程学院

出　　处： 《热加工工艺》 2009年第14期144-146,149,共4页

摘　　要： 对MB25镁合金在200～400℃进行平面应变压缩变形,研究了变形温度和变形程度对其力学性能的影响。结果显示:合金的抗拉强度随变形温度的升高呈先增后减的趋势;在250～300℃变形时,合金能够得到较高的抗拉强度;合金的抗拉强度随变形程度的增大总体呈现增大的趋势;在250℃、变形程度为90%时,合金的抗拉强度达到340 MPa,比未变形合金提高了51%;175℃×10 h的人工时效处理对合金抗拉强度的影响较小,但可显著提高MB25镁合金的塑性。 Plane strain compression tests at different temperature from 200 -400 ℃ were carded out for MB25 alloys, then for which the influences of deformation temperature and deformation degree on mechanical properties of MB25 alloy were investigated. The results show that the tensile strength increases firstly and then decreases with temperature increasing at almost all deformation degrees. The relative higher ultimate tensile strength appears when the temperature lies between 250 ℃ and 300 ℃. The tensile strength increases with the increase of deformation degree. The highest tensile strength 340 MPa appears when the deformation temperature and deformation degree are 250℃ and 90 % respectively, which is 51% higher than the original. The aging directly following hot deformation （T5） has little influence on the ultimate tensile strength, but can increase the elongation of MB25 alloys greatly.

关 键 词： 变形温度 变形程度 抗拉强度 人工时效

领　　域： [金属学及工艺] [金属学及工艺] [金属学及工艺] [一般工业技术] [金属学及工艺]