40CrNiMoA钢传动轴花键开裂失效分析  

Failure analysis of 40CrNiMoA steel transmission shaft spline

作　　者：金玉亮 刘春江[2] 吴彬龙 张洪亮 Jin Yuliang;Liu Chunjiang;Wu Binlong;Zhang Hongliang(Harbin Dongan Engine Co.,Ltd.,Harbin Heilongjiang 150066,China;Beijing Instute of Aeronautical Materials,Beijing 100095,China;School of Materials Science and Engineering,Shenyang Aerospace Universtiy,Shenyang Liaoning 110136,China)

机构地区：[1]哈尔滨东安发动机有限公司,黑龙江哈尔滨150066 [2]北京航空材料研究院,北京100095 [3]沈阳航空航天大学材料科学与工程学院,辽宁沈阳110136

出　　处：《金属热处理》2022年第8期296-300,共5页Heat Treatment of Metals

基　　金：辽宁省教育厅2021年度科学研究经费项目(面上项目)(LJKZ0170)。

摘　　要：某航空发动机用40CrNiMoA钢制传动轴在正常故障检测时花键部位发现裂纹。对断口部位进行宏观分析、扫描电镜及能谱分析、金相分析、硬度分析和温色对比试验分析。结果表明,40CrNiMoA钢传动轴花键原始裂纹区组织与基体一致,未见脱碳现象,裂纹呈沿晶开裂,表面氧化较明显。因此可推断此裂纹是在高频淬火升温阶段产生,高频淬火时加热电流过大或加热不均匀均有可能造成上述淬火裂纹的出现。建议合理控制传动轴高频淬火工艺。Cracks were found in the spline part of 40 CrNiMoA steel transmission shaft used in a aero engine during normal inspection. Macro analysis, scanning electron microscopy and energy spectrum analysis, metallographic analysis, hardness analysis and temperature and color contrast experimental analysis were carried out on the fracture site. The results show that the structure of spline crack zone of the 40 CrNiMoA transmission shaft is consistent with that of the matrix, and no decarburization phenomenon is observed. The crack is intergranular fracture, and the oxidation of crack surface is obvious. Therefore, it can be inferred that the crack is generated during the heating stage of high-frequency quenching, which results from excessive heating current or uneven heating. It is suggested to reasonably control the high frequency quenching process of transmission shaft.

关 键 词：传动轴花键 40CRNIMOA钢 淬火裂纹 高频淬火 

分 类 号：TG113.1[金属学及工艺—物理冶金]