摘要
粉末冶金可以避免铸锭冶金过程中出现的宏观偏析、枝晶偏析、化学成分不均匀、组织不一致等缺陷,是制备TiA l合金的重要方法。本文综述了近年来国内外TiA l合金粉末冶金的研究进展,介绍了预合金法、元素粉末法和机械合金化法3种TiA l粉末制备方法及其各自的烧结方法。同时评述了各烧结方法的优缺点及其制备合金的力学性能,并指出了粉末冶金制备TiA l合金今后有待改善的研究方向。
Many problems associated with ingot metallurgy, such as macrosegregation, dendritic segregation, chemical inhomogeneity, and regions of varying microstructure can be solved by powder metallurgy, which is an important method to fabricate TiAl alloy. The research states of TiAl alloy in powder metallurgy in China and other countries were reviewed and the fabrication processes of TiAl powder were introduced, including a prealloyed method, an element powder method, a mechanical alloying, and their corresponding sintering techniques. Their advantages, disadvantages and mechanical properties of the products were also reviewed, and some researching direction of TiAl powder metallurgy fabrication in future was finally pointed out.
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
2016年第9期2466-2472,共7页
Rare Metal Materials and Engineering
基金
新金属材料国家重点实验室开放基金(2013-ZD06)
国家自然科学基金(51471056)
国家重点基础研究发展计划("973"计划)(2011CB605502)
关键词
TI
AL合金
粉末冶金
制备方法
烧结技术
力学性能
TiAl alloy
powder metallurgy
fabrication process
sintering technique
mechanical property
