Clemow A J, Daniell B L
J Biomed Mater Res. 1979 Mar;13(2):265-79. doi: 10.1002/jbm.820130208.
Current practice in the manufacture of Co-Cr-Mo alloy total hip prostheses is the use of a solution treatment to increase the ductility of the as-cast alloy. This study is concerned with the reactions encountered during solution treatment at temperatures between 1165-1270 degrees C. These reactions, including incipient melting, a carbide transformation from M23C6 to M6C and sigma-phase formation, have been examined using both qualitative and quantitative metallographic techniques, and are shown to influence the production of a single phase microstructure. As a result, an optimum temperature for solution treatment of 1220 degrees C has been determined. It is further proposed that a reduction in the carbon content of this alloy would improve its solution treatment behavior.
目前钴铬钼合金全髋关节假体的制造工艺是采用固溶处理来提高铸态合金的延展性。本研究关注在1165 - 1270摄氏度温度范围内进行固溶处理时所发生的反应。这些反应，包括初熔、碳化物从M23C6向M6C的转变以及西格玛相的形成，已通过定性和定量金相技术进行了研究，结果表明这些反应会影响单相微观结构的生成。因此，已确定固溶处理的最佳温度为1220摄氏度。进一步提出，降低该合金的碳含量将改善其固溶处理性能。
