Al对HP40合金高温力学性能的影响  

Effect of aluminum on high-temperature mechanical properties of HP40 alloys

作　　者：喇培清[1] 刘辉[1] 刘致远[1] 王维国[1] 魏玉鹏[1] 卢学峰[1] 

机构地区：[1]兰州理工大学甘肃省有色金属新材料重点实验室,甘肃兰州730050

出　　处：《兰州理工大学学报》2012年第4期10-14,173,共5页Journal of Lanzhou University of Technology

基　　金：国家自然科学基金(51164022)

摘　　要：通过中频感应炉熔炼制备出铝质量分数分别为5%、7.5%、10%的HP40合金,在900℃下测试各合金的高温拉伸性能,并在扫描电镜下观察各合金的断口形貌.结果表明:随着Al质量分数的增加,合金的高温屈服强度、抗拉强度均先升高后降低,合金的延伸率先降低后增加.铝质量分数为5%的HP40合金具有最佳的高温力学性能,其900℃下的屈服强度为125MPa,抗拉强度为132MPa,延伸率为12%.HP40-based alloys with mass-fractions of 5%, 7. 5 %, 10% of aluminum were prepared in inter- mediate-frequency induction furnace. Their tensile properties at 900 ℃ were tested and fracture morpholo- gy were analyzed with SEM. The results showed that high-temperature yield strength and tensile strength of the alloys were increased at first and then decreased, but the elongation of alloys exhibited in a reverse way. HP40 alloy with 5% A1 content had the best mechanical property at high temperature, whose yield strength, tensile strength, and elongation was 125 MPa, 132 MPa and 12%, respectively.

关 键 词：HP40 铝 高温力学性能 

分 类 号：TG33[金属学及工艺—金属压力加工]