电机推力轴承支撑环材料水下疲劳性能探讨

测定电机轴承支撑环预选材料 0Cr16Ni5Mo、A564Type630H1100静力学性能、室温水下疲劳极限、室温水下疲劳曲线，结果表明： A564Type630H1100材料的拉伸强度、硬度均高于 0Cr16Ni5Mo材料， 0Cr16Ni5Mo材料的冲击功大于 A564Type630H1100材料。循环 107周次 A564Type630H1100材料水下疲劳极限为 415MPa，0Cr16Ni5Mo材料水下疲劳极限为 434MPa，两种材料疲劳极限均满足支撑环材料疲劳强度要求（不小于 197MPa）。在低载荷区（不大于 500MPa）0Cr16Ni5Mo疲劳寿命高于 A564Type630H1100，在高载荷区（不小于 500MPa）0Cr16Ni5Mo疲劳寿命低于 A564Type630H1100。试验初步建立静力学性能与动力学性能体系，为其合理应用提供可靠数据。

Discussionaboutunderwaterfatigueperformanceofsupport ringmaterialformotorthrustbearing

The static properties，underwater fatigue limits at room temperature and underwater fatigue curves at room temperature of 0Cr16Ni5Mo and A564 Type 630H1100 materials for support ring of motor thrust bearing were tested. The results indicated that the tensile strength and hardness of A564Type630H1100 were all higher than that of 0Cr16Ni5Mo material. The impact value of 0Cr16Ni5Mo was greater than that ofA564Type630H1100 material. The underwater fatigue limit of A564 Type 630H1100 and 0Cr16Ni5Mo were 415 MPa and 434 MPa，respectively，during10⁷-cycletest.The fatigue limits of both materials met the requirements of support ring material（≥197 MPa）. The fatigue life of 0Cr16Ni5Mo in low load region（ ≤500 MPa）was higher than that of A564Type630 H1100 and the fatigue life of 0Cr16Ni5Mo in highload region（≥500MPa）was lower than that ofA564Type630H1100.The system of static properties and dynamic performance were established，which could provide reliable datas for its rational application.