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定向凝固 Mar M200+Hf 是于1969年在定向凝固 Mar-M200的基础上发展起来的。由于采用了定向凝固技术和添加了少量的铪变质剂,该合金具有优良能高中温综合性能,优异的抗热疲劳性能和较好的铸造性能,从而在先进的涡轮喷气发动机上获得了广泛的应用。该合金在美国普拉特·惠特尼公司被命名为PWA-1422合金,法国 Turbomeca 公司则根据合金中主成分元素的化学符号将合金命名为
Directional solidification Mar M200 + Hf was developed in 1969 on the basis of the directional solidification Mar-M200. Due to the directional solidification technology and the addition of a small amount of hafnium modifier, the alloy has excellent high temperature performance, excellent thermal fatigue resistance and good casting performance, thus obtaining a wide range of advanced turbojet engines application. The alloy in the United States Pratt Whitney company was named PWA-1422 alloy, France Turbomeca company based on the chemical composition of the alloy elements of the alloy name the alloy