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本文介绍了铝—石墨复合自润滑轴承的制备工艺和各种性能。作者是以铜包或镍包石墨的形式,藉旋涡搅拌将石墨加入熔融的液态铝中,并采用挤压铸造法(液态模锻)制备铝—石墨复合自润滑轴承的。由测试结果表明,该轴承材质致密,石墨分布均匀,无疏松、缩孔等铸造缺陷;其机械性能符合设计指标,耐磨性能优于锡青铜和巴氏合金材料;在无油润滑条件下,它的摩擦系数小于锡青铜和巴氏合金的,而高于后两种材料在油润滑条件下的摩擦系数。并指出,石墨加入铝液后有一定量的损耗。粒度愈小,损耗量愈大。
This article describes the preparation of aluminum - graphite composite self-lubricating bearings and a variety of performance. The author is in the form of copper clad or nickel-coated graphite, by adding vortex graphite graphite melt liquid aluminum, and the use of squeeze casting method (liquid forging) Preparation of aluminum - graphite composite self-lubricating bearings. The test results show that the bearing material is compact, the graphite is evenly distributed, no defects such as looseness and shrinkage holes are found, the mechanical properties of the bearing are in accordance with the design indexes, and the wear resistance is better than that of the tin bronze and the babbitt alloy. Under the condition of no oil lubrication, Its coefficient of friction is less than that of tin bronze and babbitt, but higher than the friction coefficient of the latter two materials under oil-lubricated conditions. And pointed out that there is a certain amount of loss of graphite after adding liquid aluminum. The smaller the particle size, the greater the amount of wear.