改进DZ-22定向凝固高温合金热处理制度的研究  

THE STUDY OF IMPROVEMENT HEAT TREATMENT OF SUPERALLOY DZ-22

作　　者：佘力[1] 王罗宝[1] 陈荣章 

机构地区：[1]北京航空材料研究院

出　　处：《航空材料学报》1997年第1期50-57,共8页Journal of Aeronautical Materials

摘　　要：研究了一种新的热处理制度对DZ－22走向凝固高温合金组织和性能的影响。结果表明，采用新热处理制度先进行预处理，可以消除低熔点相，提高合金的初熔温度，然后提高合金的固溶温度。在随后的冷却和时效过程中，析出更多的细小γ'相使合金的拉伸强度和持久性能得到明显提高。The effect of two heat treatment on the microstructure and mechanical properties of superalloy DZ-22 was studied in this paper. Experimental results showed that the Ni5Hf-phase may be eliminated by means of pretreatment at 1180℃ for 2h. The incipient melting of DZ-22 superalloy may be effectively controlled. With increasing solution temperature,more and finer γY phases were reprecipitated during cooling and aging. The tensile strength at 25℃, 760℃, 980℃ and 760℃, 980℃, 1040℃ srtess-repture life of this alloy increased significantly.

关 键 词：定向凝固 高温合金 热处理 组织性能 

分 类 号：TG166[金属学及工艺—热处理]