论文部分内容阅读
激光熔覆具有广阔的发展前景,潜力很大,经济效益可观,引起国内外广泛的关注,并投入人才物力进行研究。 航空发动机钛合金和镍基合金摩擦副的接触磨损是发动机使用和维修中的一大难题,利用激光熔覆技术则可获得优良的涂层,为燃气涡轮发动机零件的修复开创了一个新途径。该工作研究了激光表面熔覆高温耐磨涂层的激光喷涂技术,在DZ4合金基体上,喷涂CoCrW合金粉末和WC粉末的机械混合物,厚度为0.3mm,提高了高温耐磨及抗腐蚀性能,对镍基合金制造的航空发动机涡轮叶片,利用激光熔覆技术熔覆钴基合金,提高了耐热耐磨性能,与热喷镀等方法相比,缩短了涂层制备的时间,质量稳定,且消除了由热影响可
Laser cladding has broad prospects for development, great potential, considerable economic benefits, aroused widespread concern at home and abroad, and put personnel resources to carry out research. Contact wear of aero-engine titanium alloy and nickel-based alloy friction pair is a major challenge in the use and maintenance of the engine. The use of laser cladding technology can obtain excellent coating, which opens up a new way for the repair of gas turbine engine parts. In this work, the laser spraying technology of high temperature wear-resistant coating on laser surface was studied. The mechanical mixture of CoCrW alloy powder and WC powder was sprayed on the DZ4 alloy substrate to a thickness of 0.3mm, which improved the high temperature wear resistance and corrosion resistance, On the aero-engine turbine blades made of nickel-based alloy, the laser cladding technology is used to coat the cobalt-based alloy so as to improve the heat-resistant and wear-resistant properties. Compared with the thermal spraying method and the like, the coating preparation time is shortened, the quality is stable, And eliminates the effects of heat