摘要
利用热喷涂和激光熔覆技术分别制备了镍基涂层,采用显微组织和显微硬度法对两种涂层进行了对比研究。结果表明:两种工艺得到的涂层组织基本相同,主要包括-γN i固溶体、硼化物、碳化物+镍γ-固溶体共晶以及合金渗碳体等金属间化合物,热喷涂涂层组织中未形成共晶体;两种涂层的平均硬度均高于基体,均达到了表面强化的目的。
The properties of two kinds of Ni60 coatings which are deposited by laser cladding and thermal spraying respectively are studied by microstrueture and micro-hardness. The results show that the coatings formed by both processes have same micrsatructure which mainly composed of γ-Ni solid solution, euteetic of boride, carbide ＋γ-solid solution and intermetallic compounds such as eementite alloys etc. The euteetics are not formed in the thermal sprayed coating. The average micro-hardness in coatings are higher than that of the matrix and have been achieved the purpose of surface hardening
出处
《热处理技术与装备》
2010年第1期28-31,共4页
Heat Treatment Technology and Equipment
关键词
激光熔覆
热喷涂
镍基合金
laser cladding
thermal spraying
Ni-based alloys
