1、

They are outstanding for their hardness, density and resistance to thermal shock, wear, chemical attack and self-lubricating property.

它具有硬度高、密度高、抗热振性、耐磨性抗化学腐蚀性和自润滑性好等特点。

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2、

Both self-lubrication material spiral surface with oil grooves were molded integrally. A screw-transmission efficiency test set was developed. The friction property of the copper nut and the composite nut under different conditions were tested and compared.

自行研制开发了螺旋传动效率测试装置,模拟重载螺旋副工况,对比了铜螺母与复合材料螺母在不同状态下的摩擦特性。

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