低温强化处理对中高熔铸造合金机械性能的影响

The Effect of Cryotreat on the Mechanical Properties of the Medium and High Melting Point Castable Alloys

考察了低温强化处理对中、高熔铸造合金机械性能及硬度的影响。结果表明：１．低温强化处理使中熔铸造合金的屈服强度提高了４０．００％（Ｐ＜０．０１），高熔铸造合金的屈服强度提高了２５．４５％（Ｐ＜０．０１）。２．低温强化处理使高熔铸造合金的屈服模量提高了２５．７７％（Ｐ＜０．０１）。３．低温强化处理使中熔铸造合金的硬度提高了２４．４０％（Ｐ＜０．０１），高熔铸造合金的硬度提高了７．７７％（Ｐ＜０．０１）。提示：低温强化处理对口腔修复材料中高熔铸造合金均是一种有效的处理手段，可以提高其强度和硬度。

Two mechanical properties that are closely related to the clinical practice, i.e. the surrendering toughness and the hardness, of the medium and high melting point castable alloys, were tested before and after the cryotreat. The results showed: 1. Cryotreat significantly increased the surrendering toughness of the medium and high melting point castable alloys (40.00%); 2. Cryotreat significantly increased the surrendering toughness of the medium and high melting point castable alloys (25.45%); 3.Cryotreat significantly increased the surrendering modulus of the high melting point castable alloys(25.77%); 4.Cryotreat significantly increased the hardness of the medium melting point alloys(24.40%); 5.Cryotreat significantly increased the hardness of the medium melting point alloys (7.77%). These results suggeste that cryotreat is an effective procedure in enhancing the toughness and hardness of the medium and high melting point castable alloys.