日立金属股份有限公司对合金的热膨胀系数和蠕变断裂强度经过改革后,开发研制出低热膨胀超耐热合金 HRA929和HRA929C 两种合金。低热膨胀超耐热合金是用于燃气轮机,在高温下具有低膨胀间隙的合金。同时又是在高温下使用的结构用陶 Hitachi Metals Co., Ltd. on the thermal expansion coefficient of the alloy and creep rupture strength after the reform and development of low thermal expansion superalloys HRA929 and HRA929C two alloys. Low thermal expansion superalloys are alloys used in gas turbines that have a low expansion gap at high temperatures. At the same time is the use of high temperature ceramic structure