渗铝工艺对涡轮叶片表面冶金缺陷荧光显示的影响分析  

Analysis on Influence of Aluminizing Technology on Fluorescence Displayof Metallurgical Defects on Turbine Blade Surface

作　　者：张传明 赵帅军 李凡 杨克杰 孙晓雪 ZHANG Chuan-ming;ZHAO Shuai-jun;LI Fan;YANG Ke-jie;SUN Xiao-xue(AECC Shenyang Liming Aero-Engine Co.,Ltd.,Shenyahg 110043,Liaoning,China)

机构地区：[1]中国航发沈阳黎明航空发动机有限责任公司,辽宁沈阳110043

出　　处：《铸造》2020年第9期958-962,共5页Foundry

摘　　要：涡轮叶片是航空发动机热端转动部件,在制造过程中可以通过渗铝工艺来提高叶片表面抗氧化能力。渗铝工艺是一个热过程,通常会促进涡轮叶片原带缺陷的暴露,因此对渗铝后叶片进行荧光渗透检测可发现更多的不合格品。渗铝工艺还会在叶片表面形成一薄层保护膜,是否会掩盖缺陷至今没有研究。本研究对带有缺陷的涡轮叶片在渗铝前后进行了荧光渗透检测、理化分析等试验。结果表明,渗铝工艺对叶片表面缺陷还具有掩盖作用,建议在涡轮叶片渗铝工序前增加一道荧光渗透检测以剔除原带缺陷。The turbine blade is the rotating part of the hot end of the aeroengine. During the manufacturing process, the surface oxidation resistance of the blade can be improved by aluminizing process. Aluminizing process is a thermal process, which usually promotes the exposure of turbine blade defects. Therefore, more unqualified products can be found after aluminizing by fluorescent penetrant inspection. The aluminizing process can also form a thin protective film on the blade surface, whether it can cover up the defects has not been studied. In the present study, the turbine blades with defects were tested by fluorescent penetrant test and physical and chemical analysis before and after aluminizing. The results show that the aluminizing process can also cover the surface defects of turbine blades. It is suggested to add a fluorescent penetrant inspection before the aluminizing process of turbine blades to eliminate the original defects.

关 键 词：涡轮叶片 渗铝 荧光渗透检测 理化检测 

分 类 号：TG115.28[金属学及工艺—物理冶金]