【摘要】 过比较不同比例的新旧钴铬合金铸造后的抗拉强度、屈服强度、延伸率、硬度等机械性能指标,并结合相应的金相观察及化学成份分析,得出结论:铸造钴铬合金中可加入不超过40%的仅铸造过一次的旧料而不影响合金的主要机械性能,超过这一比例,将影响修复体的质量更多还原

【Abstract】 Effects of addition of different proportion of once-used alloys to casting cobalt chromiun alloys on their physical properites in air environment were studied. The physical properties included tensile strength,yield strength, elongation and hardness. Combined with the observation of the metallograph and analysis of the change of chemical composition of alloys, we can draw the following conclusion:the addition of within the range of 40% once-used cobalt chromium alloy to casting cobalt chromium alloy wouldn’t affect the quality of restorations, excessive addition of once-used alloy would damaged the microstructure and physical properties.更多还原