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在TA15-2表面进行激光同轴送粉合金化Stellite 12-B4C粉末制备耐磨复合涂层.研究表明,加入Cu可促使大量超细纳米多晶体及非晶相在涂层中产生,从而增强涂层的耐磨性.Cu对激光合金化涂层的纳米化过程,是利用Cu在激光熔池中原位化学反应生成的AlCu2Ti超细纳米晶相来抑制颗粒长大的过程,也是大量纳米多晶体生成的过程.含Cu涂层主要由gCo,M12C,M23C6,W-C,Ti-B及AlCu2Ti晶化相、大量非晶相构成.AlCu2Ti超细纳米晶在高温熔池中具有较高的扩散率,易引发晶格畸变,使涂层发生非晶化转变.
Preparation of wear-resistant composite coating on the surface of TA15-2 by laser co-feeding alloyed Stellite 12-B4C powder.Research shows that the addition of Cu can promote a large number of ultrafine nano polycrystal and amorphous phase in the coating to enhance Coating wear resistance.Cu laser alloying coating nanocrystallization process is the use of Cu in the laser bath in-situ chemical reaction generated AlCu2Ti ultrafine nanocrystalline phase to inhibit particle growth process, but also a large number of nano-multi The Cu-containing coatings consist mainly of gCo, M12C, M23C6, WC, Ti-B and AlCu2Ti phases and a large number of amorphous phases.AlCu2Ti ultrafine nanocrystals have a high diffusion rate , Easily lead to lattice distortion, the coating amorphous transition occurred.