摘要
本文结合苏联铸造镍基高温合金的理论和实践,论述了三种类型碳化物 MC,M_(23)C_6和M_6C 的形成机理和作用.对各种条件下这些碳化物的相互转化进行了探讨。指明'汉字形'MC 碳化物可由液体形成,结晶时 M_6C 碳化物也可由熔融金属产生。作者强调研究铪对碳化物转变的影响以及受碳化物反应制约的合金使用性能的变化。
In this article mechanism of formation and role of three types of carbides— MC,M_(23)C_6 and M_6C are described in combination with Sovit Union's theory and practiee in east superalloys on nickel base.Transformation of carbides under dif- ferent conditions is discussed.It is pointed out that'Chinese character'MC car- bide can be formed from Iiquid and M_6C carbide—from melt during crystalliza- tion.In author's view emphasis must be placed on the study of influence of Hf on carbide formation and change of survice properties restricted by carbide rea- ction.
出处
《航空材料学报》
EI
CAS
CSCD
1991年第2期1-8,共8页
Journal of Aeronautical Materials
