一种新型耐高温表面复合层的研制

为提高耐高温合金工作层性能,本文采用材料逆向设计准则及表面复合技术,在耐高温合金表面堆焊熔敷层金属,并对堆焊金属的高温磨损性能及热疲劳行为进行了研究。结果表明,在转速一定时,随着试验温度的升高,堆焊层的磨损失重量先增加后减少;在试验温度一定时,随着转速的增加,材料的磨损失重量也是先增加后减少;堆焊层在上限温度为400℃和600℃时,具有良好的热疲劳性能。该材料可作为高速列车制动盘、石油钻机盘式刹车制动盘等高能制动盘工作层材料。

A New Type of High-temperature Surface Composite Layer

For the purpose of improving the working performances of high-temperature alloys,the reversal designing standard on materials and the surface recombination technology were put into research in this paper.High temperature wear resistance and thermal fatigue behavior of welding surface layer based on the high-temperature alloy were studied.The results show that,the wear weight loss at a certain temperature increased and then decreased with increasing the test speed.It is also showed that the wear weight loss increased and then decreased with increasing the test temperature at a certain rotation speed.The welding surface layer has excellent thermal fatigue performance when the test temperature at 400℃ and 600℃,which can be used as the working layer of high-energy brake discs such as the brake discs of high-speed trains and oil drilling rigs.