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目前各国广泛应用的合油轴承有两种:即青铜-石墨、铁-石墨含油轴承.后者生产成本低,强度高,磨损小,能承担较大的荷重,但其抗卡性及耐腐蚀性能不如青铜-石墨含油轴承.铁-石墨合油轴承所用的铁粉,一般都用还原法制取,纯度只要求含铁量>92%.制造这种铁粉的原料极为泛,如高品位的铁矿和铁鳞、酸浸沉坭、黄铁矿渣等工叶废料,都可利用.轴承中所需加入的石墨量,往往随所要求的机械性能和铁粉纯度的不同而有所差别,但通常保持在6%以下.由于铁粉纯度和石墨含量的不同,文献中对铁-石墨含油轴承性能的数据,差别亦很大,合油25%容积的铁-石墨轴承的许可使用PV值,在无油补充的情况下,一般不超过25千克/厘米~2·米/秒,在有油补充的情况下,不应超过100千克/厘米~2·米/秒.
At present, there are two kinds of oil-lubricated bearings that are widely used in various countries: bronze-graphite, iron-graphite oil-bearing, which has the advantages of low production cost, high strength and small wear and can bear a large load but its card resistance and corrosion resistance The performance is not as good as bronze - graphite oil bearing iron-graphite oil bearing iron powder, generally prepared by the reduction method, the purity of only requires iron content> 92% .The manufacture of this iron powder is very extensive raw materials, such as high-grade Iron ore and scale, acid leaching Shen, pyrite slag leaves and other waste, can be used. The amount of graphite required to join the bearing, often with the required mechanical properties and the purity of iron powder vary, but Usually kept below 6% Due to the different purity of iron powder and graphite content, the literature on the performance of iron-graphite oil bearing performance data, the difference is also great, oil 25% volume of iron-graphite bearings permit the use of PV value, In the case of oil-free replenishment, it is generally not more than 25 kg / cm -2 m / s and should not exceed 100 kg / cm -2 m / s in the case of oil replenishment.