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“FL912”型风冷柴油机所采用的铜铅轴瓦是由西德购进的成品,经过其金相显微组织分析,扫描电镜分析其金相组织特点,铜铅合金中钢架呈树枝状,枝晶处析出铅相有方向性,冷却方向（即枝晶方向）垂直钢背（即曲轴的径向方向）。在铜铅合金层和巴氏合金层中镀有一层Ni栅1─3微米,以阻止表层锡使用中通过扩散进入铜铅层,我们认为此轴瓦是采用了较为先进的生产工艺。 试验室对“FL912”型风冷柴油机进行了台架耐久性试验,试验前后对西德轴瓦进行了精密测量,经3000小时后的磨损值只有磨损极限值的1/4─1/10。 目前此轴瓦在国内还没有生产出来,这除对轴瓦要求较高外,主要是没有引进工艺技术图纸及资料,我们想通过技术分析和使用情况的简介,能与轴瓦专业厂充分合作,以便使该轴瓦的国产化早日实现。
The “FL912” type air-cooled diesel engine used in the production of copper-lead bearing is purchased from West Germany. After its metallographic microstructure analysis, the scanning electron microscopy analysis of its microstructure features, copper-lead alloy was dendritic, dendrites Precipitation of the lead phase direction, the cooling direction (ie dendrite direction) vertical steel back (ie, the radial direction of the crankshaft). In the copper-lead alloy layer and the pasteurized alloy layer is coated with a Ni gate 1 ─ 3 microns to prevent the surface of tin through the use of diffusion into the copper-lead layer, we believe that this bearing is the use of a more advanced production technology. The laboratory carried out a bench durability test on the “FL912” air-cooled diesel engine. Before and after the test, the West Germany bearing bush was precisely measured. The wear value after 3000 hours was only 1/4 to 1/10 of the wear limit. At present, this bearing has not been produced domestically yet. In addition to the high requirement for bearing bush, it is mainly because there is no introduction of technical drawing and information. We would like to make full cooperation with bearing bush professional factory through the introduction of technical analysis and usage, The bearing of localization as soon as possible.