Ti6Al4V钛合金表面激光熔覆复合涂层的高温稳定性  

High-temperature Stability of Laser Cladding Composite Coating on Ti6Al4V Alloy Suface

作　　者：石皋莲[1] 吴少华[1] 任佳[2] 

机构地区：[1]苏州工业职业技术学院,江苏苏州215104 [2]苏州大学机电工程学院,江苏苏州215006

出　　处：《热加工工艺》2017年第22期146-148,共3页Hot Working Technology

基　　金：江苏省自然科学基金项目(BK20160353);江苏省高校自然科学研究面上项目(16KJB460032);江苏高校品牌专业建设工程资助项目(PPZY2015B186)

摘　　要：以30%Al-40%Ni-12%Mo-18%Si(质量分数,%)复合粉末为原材料,采用激光熔覆技术在Ti6Al4V合金表面制备了30Al复合涂层。研究了800℃下保温1、10、30、50 h时复合涂层的物相、显微硬度及显微组织。结果表明:高温热处理前和热处理10 h后,该涂层的物相组成和显微组织基本不变;该涂层的显微硬度仅在保温50 h后下降约100HV0.3。该涂层表现出了良好的高温稳定性。Taking 30% Al-40% Ni-12% Mo-18% Si （wt%） composite powder as raw material, 30A1 composite coating on Ti6A14V alloy was prepared by laser cladding technology. The phase, microhardness and microstructure of the composite coating after heating at 800℃ for 1 h, 10 h, 30 h and 50 h were researched. The results show that the phase composition and microstructure of the coating change little before treatment and after treatment at 800℃ for 10 h, and the mircohardness of the coating slightly decreases by about 100 HV0.3 only after holding for 50 h. The coating exhibits good high temperature stability.

关 键 词：TI6AL4V钛合金 高温稳定性 复合涂层 显微组织 显微硬度 

分 类 号：TG125.9[金属学及工艺—金属学] TG174.44