Abstract

The demand for CoCrMo alloy as an artificial prosthesis has increased for its reliable properties. However, machining of CoCrMo alloy is challenging due to meet the high requirements on prosthesis’ surface quality. In this paper, a new approach of fine ELID grinding on CoCrMo alloy has been proposed using a Kistler three-component dynamometer to monitor the grinding force in real time. This paper also presents the friction and wear performance of CoCrMo alloy. Results show that better efficiency and surface quality can be obtained with low feed speed and small grinding depth. The passivation layer was found on the surface of CoCrMo alloy after ELID grinding, which makes the CoCrMo alloy prosthesis have better biocompatibility. The wear resistance test has proved that CoCrMo alloy has better wear resistance and lower wear quality and is suitable for manufacturing prosthesis.

摘要

钴铬钼合金作为人造假体的需求因其可靠的性能而增加。然而，由于对假体表面质量的高要求，CoCrMo合金的加工具有挑战性。在本文中，提出了一种使用奇石乐三分量测力计实时监测磨削力的 CoCrMo 合金精细 ELID 磨削的新方法。本文还介绍了 CoCrMo 合金的摩擦磨损性能。结果表明，低进给速度和小磨削深度可以获得更好的效率和表面质量。ELID研磨后在CoCrMo合金表面发现钝化层，使CoCrMo合金假体具有更好的生物相容性。