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近来,建筑组织、机械化及技术援助科学研究所的机器寿命实验室,曾经对使用情况下的э-302型挖掘机进行了观察,并对由35号和40 X钢制成的前桥主要零件损坏的原因进行了研究。观察时曾选出挖掘机的如下零件:半轴义形接头(图1),接头凸块(图2),接头圆盘。上述零件皆进行了金相分析,机械性能试验,以及金属的化学成份分析。所研究的半轴义形接头的化学成份为(元素含量
Recently, the Laboratory of Machine Life at the Organization for Building Organization, Mechanization and Technical Assistance Institute has observed the use of the э-302 excavator and analyzed the main front axle components made of 35 and 40 X steels The cause of the damage was studied. Excavator has been selected during the observation of the following parts: Semi-axis deformable joint (Figure 1), joint bumps (Figure 2), joint disc. The above parts were metallographic analysis, mechanical properties tests, and metal chemical composition analysis. The chemical composition of the semiaxial joist studied is (elemental content