BJ—130型二吨轻型载重汽车的后桥半轴(图1)原为40Cr 钢制经高频淬火处理,使用中常常发生早期损坏,严重的出厂仅几个月。因而半轴早期损坏问题成了当时的质量关键。在有关领导机关的重视下,于1974年的轴齿材料强度会议上,确定由长春汽车研究所、二里沟汽车制造厂(现为北京第二汽车制造厂) BJ-130-type two-ton light truck axle axle (Figure 1) was originally 40Cr steel by high-frequency quenching, the use of early damage often occurs, the serious factory only a few months. Thus the problem of early axle damage has become the key to the quality at the time. In the attention of the relevant leading organs, at the shaft material strength meeting in 1974, it was confirmed that Changchun Automobile Research Institute, Erligou Automobile Manufacturing Plant (now Beijing No.2 Automobile Manufacturing Plant)