(四)机械性能试验。1.退火状态的机械性能。代用钢和ШХ15钢在退火状态的机械性能列于表3。两者的金相组织都是均匀分布的细粒状珠光体。表3指出,代用钢的强度较ШХ15为高,这可由锰、硅合金元素强化α——固溶体得到解释。其他塑性、韧性和硬度值等都与ШХ15相似,仅磨损值较低,但事实上轴承零件不可能在退火状态使用,因此这项性能无关紧要。 (D) mechanical performance test. 1. Annealing the mechanical properties. The mechanical properties of the substitute steel and ШХ15 steel in the annealed condition are shown in Table 3. Both the microstructure are uniformly distributed fine granular pearlite. Table 3 indicates that the strength of alternative steels is higher than ШХ15, which can be explained by the strengthening of α-solid solutions of manganese and silicon alloy elements. Other plasticity, toughness and hardness values ​​are similar to ШХ15 with only low wear values, but the fact that bearing parts can not be used in an annealed condition does not matter.