论文部分内容阅读
金马-150型小四轮拖拉机的固定螺钉是用来固定小四轮拖拉机变速箱体中的行星齿轮轴,在使用中受到交变的剪切应力。其原设计材料为渗碳钢,热处理工艺为渗碳、淬火、低温回火。后因受材料和热处理设备的限制,采用45钢代用,其热处理工艺为淬火。低温回火。在进行田间试验时,分别使用十几小时及几十小时,就发生断裂,为此进行了失效分析。
Kinmen and Matsu-150 small four-wheel tractor fixed screws are used to fix the small four-wheel tractor transmission body planetary gear shaft, in use by the alternating shear stress. The original design materials for the carburizing steel, heat treatment process for carburizing, quenching, tempering at low temperature. Due to material and heat treatment equipment constraints, the use of 45 steel substitution, the heat treatment process for quenching. Low temperature tempering. In the field trials, the use of more than ten hours and dozens of hours, the fracture occurred, for which a failure analysis.