摘要
为提高钛合金的表面耐磨性能,分别以N iCrBS i、N iCrBS i+B4C和B4C+Ti三种材料体系为预涂粉,在Ti-6A l-4V表面涂覆不同厚度的预涂层,采用CO2激光器进行激光熔覆工艺研究.在相同激光熔覆工艺条件下,对不同材料体系的涂层质量进行观察与分析,确认N iCrBS i+B4C材料涂层是三种材料体系中最好的.在激光熔覆过程中,N iCrBS i+B4C材料中的B4C和Ti发生反应,原位生成增强相,对涂层有强化作用.而且,N iCrBS i的加入控制了原位反应的剧烈程度,减少裂纹和气孔,保证了涂层质量.
In order to improve wear resistance of titanium alloy, using a CO2 laser equipment, a process of clad coating on Ti -6Al -4V substrate with several thicknesses of pre-placed NiCrBSi, NiCrBSi ＋ B4C and B4C ＋ Ti powder layers was studied. In the same laser process parameters, three kinds of laser coatings preplaced with different powders were examined and analyzed. The laser cladding coating pre-placed with NiCrBSi ＋ B4C powders is the best of the three coatings. In the laser cladding process, there is a reaction between B4C and Ti in-situ producing reinforced phases that reinforce the the reaction and a good quality coating with less cracks and pores can be coating. NiCrBSi reduces activity of obtained.
出处
《材料科学与工艺》
EI
CAS
CSCD
北大核心
2006年第3期233-235,共3页
Materials Science and Technology
