目的 探讨反复熔铸对钴铬烤瓷合金力学性能的影响.方法 钴铬烤瓷合金经过单纯反复熔铸3次后,用拉伸实验对各代试件的拉伸强度、0.2%屈服强度、延伸率进行比较;用弯曲实验对各代试件的弯曲强度、弯曲模量进行比较;用硬度实验对各代试件的维氏硬度值进行比较.结果 经过不同熔铸次数的钴铬烤瓷合金的拉伸强度、0.2%屈服强度、延伸率、弯曲强度、弯曲模量及维氏硬度值差异均无统计学意义.结论 钴铬烤瓷合金至少可以反复熔铸3次而不引起力学性能的下降.%Objective To study the mechanical properties of Co-Cr ceramic alloy after recasts. Methods Co-Cr ceramic alloy cast samples were prepared and recast for 3 times without adding any new Co-Cr ceramic alloy. The tensile strength, 0.2％ yield strength, percentage of elongation, flexural strength, flexural modulus and Vickers hardness of each specimen were measured. Results Being east for different times, the Co-Cr ceramic alloy showed no significant differences on their tensile strength, 0.2％ yield strength, percentage of elongation, flexural strength, flexural modulus and Vickers hardness. Conclusion Co-Cr ceramic alloy can be recast for 3 times at least, without decrease of the mechanical properties.
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