T Yoneyama, M Kotake, E Kobayashi, H Doi, H Hamanaka
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引用次数: 0
摘要
通过拉伸试验和差示扫描量热法(DSC)研究了铸型材料和热处理对ni -钛合金铸件拉伸性能和转变温度的影响，以期将该合金的特殊性能应用于牙科领域。两种合金的组成分别为49.0和49.2 at % Ti。用二氧化硅和氧化镁作为模具材料。在440℃下热处理1.8 k。热处理后，两种成分的表观抗压强度均降低，Ni-49.2Ti的残余应变增加。在Ni-49.0Ti合金中，采用镁砂模具或热处理均可提高合金的伸长率。随着镁砂模具的使用，Ni-49.2Ti的相变温度升高。热处理后的变化表明其结构发生了变化。开发一种合适的合金铸造方法有望带来牙科新设备和新疗法的发展。
Influence of mold materials and heat treatment on tensile properties of Ni-Ti alloy castings.
The influence of mold materials and heat treatment on the tensile properties and the transformation temperatures of Ni-Ti alloy castings was investigated by tensile test and differential scanning calorimetry (DSC) in order to apply the special properties of the alloy to dental field. The compositions of the two alloys examined were 49.0 and 49.2 at % Ti. A silica investment and a magnesia investment were used as the mold materials. Heat treatment at 440 degrees C for 1.8 ks was performed. Apparent proof strength decreased in both compositions, and residual strain increased in Ni-49.2Ti by the heat treatment. Elongation increased in Ni-49.0Ti with use of the magnesia mold or by the heat treatment. The transformation temperatures of Ni-49.2Ti increased with use of the magnesia mold. The change by the heat treatment suggested a structural change. The development of a suitable method for the casting of the alloy is expected to bring about the development of new devices and therapy in dentistry.
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