行星轴巴氏合金失效分析

发布时间：2019-06-03 10:13

【摘要】：利用化学分析、硬度检测、超声波探伤、光学显微镜、扫描电镜及能谱仪等手段,对行星轴巴氏合金出现的异常掉块、烧伤失效现象进行分析。结果表明,巴氏合金铅含量异常高,超探显示局部有小面积结合不良,合金与钢背结合部位存在断续锡层等情况。经分析,认为造成巴氏合金异常掉块、烧伤的主要原因在于巴氏合金中杂质铅含量太高,铅沿晶界析出形成网状铅,分割了基体组织,降低了合金强度和塑性。并且由于工艺不良造成了结合缺陷,使得巴氏合金出现早期疲劳、脱壳剥落而失效。
[Abstract]:By means of chemical analysis, hardness testing, ultrasonic flaw detection, optical microscope, scanning electron microscope and energy dispersive spectrometer, the abnormal loss of block and burn failure of Babbitt alloy on planet axis were analyzed by means of chemical analysis, hardness test, ultrasonic flaw detection, optical microscope, scanning electron microscope and energy dispersive spectrometer. The results show that the lead content of Pasteur alloy is extremely high, the superprobe shows that there is a small area of poor binding in the local area, and there is a intermittent tin layer in the bonding part between the alloy and the back of the steel. It is considered that the main reason for the burn is that the impurity lead content in Pasteur alloy is too high, and lead precipitates along the grain boundary to form reticulated lead, which divides the matrix structure and reduces the strength and plasticity of the alloy. Due to the poor process, the bonding defects caused by the poor process, the Pasteur alloy appeared early fatigue, peeling off the shell and failed.
【作者单位】：海装重庆局;
【分类号】：TG115

【共引文献】