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0 前 言 现代大功率内燃机滑动轴承经受着高的脉动负荷、较大的油膜压力和较高的工作温度,因此对轴瓦的机械性能和使用可靠性的要求很高,而这些特性不是轴瓦某种单一的金属材料所胜任的。图1为铜铅合金轴瓦结构。轴承合金必须牢固地粘结到钢背上。高强度的钢背为轴瓦提供强有力的支承并大大提高承载力和抗疲劳性。铸造过程中钢背要经受高温加热和激冷工序,如何使钢背的金相和机械性能不劣化是一个相当复杂的课题。对此,我们在上海铁道学院夏建新,贺德时教授的合作下,对钢背防止产生魏氏体金相组织的难题进行了多次试验,并获得好的
0 Introduction Modern high-power internal combustion engine sliding bearing subjected to high pulsation load, large oil film pressure and high working temperature, so the mechanical properties of bearings and the reliability of the use of high demand, and these characteristics are not a single bearing The metal material is competent. Figure 1 is a copper-lead alloy bearing structure. The bearing alloy must be firmly bonded to the steel back. High-strength steel back for the bearing to provide strong support and greatly improve the bearing capacity and fatigue resistance. In the process of casting steel back to withstand high temperature heating and chilling process, how to make the steel back the metallographic and mechanical properties of non-deterioration is a very complex issue. In this regard, we in the Shanghai Railway Institute Xia Jianxin, Professor He Deshi cooperation, the steel back to prevent the formation of Wessel metal microstructure problems carried out several tests and get good