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中南大学学报(自然科学版)

Journal of Central South University

第24卷    第4期    总第92期    1993年8月

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文章编号:(1993)04-496-4
制备Ti-Al基合金的粉末冶金新工艺
黄伯云; 张兵; 曲选辉; 雷长明

(中南工业大学粉末冶金研究所;长沙; 410083)

摘 要: 本文设计了一种制备 Ti-48A1-2Cr-2Nb(at%)合金的粉末冶金方法。首先采用非自耗电弧熔炼炉炼制出较脆的富铝 Ti-54 A1-2.25 Cr-2.25 Nb(at%)合金,然后机械破碎成—200目的粉末。在合金粉末中按比例加入—200目Ti粉,调到所需成分。混合粉末首先经CIP成形,然后经HIP固结成致密体。后续热处理使成分均匀和获得理想的微观组织。本文还重点研究了后续热处理工艺对合金的微观组织与力学性能影响。

 

关键字: 金属间化合物; 显微组织; 力学性能; 粉末冶金

PREPARATION OF P/M Ti-Al BASE INTERMETALLIC COMPOUNDS
Huang Baiyun; Zhang Bing; Qu Xuanhui; Lei Changming

Powder Metallurgy Research Institute; Central South University of Technology; Changsha; 410083; China

Abstract:A powder metallurgical process to produce Ti-48Al-2Cr-2Nb(at%) alloy has been developed. A morebrittle Al-rich Ti-54Al-2.25Cr-2.25Nb at% alloy was prepared by non-consumable electrode arcmeltingtechnique and then mechanically pulverized into powders of -200 mesh. The pulverized Al-rich alloy pow-ders were randomly mixed with some elemental titanium powders to reach the designed composition. Themixture was firstly precompacted by cold isostatic pressing (CIP) and then hot is ostatically pressed (HIP)to full density. Subsequent heat treatments were applied to achieve chemical homogenity and desirable microstructures. The emphasis was placed on the effects of subsequent heat-treatment on the microstructuresand mechanical properties of the sintered Ti-Al base alloy.

 

Key words: intermetallics; microstructure; mechanical properties; powder metallurgy

中南大学学报(自然科学版)
  ISSN 1672-7207
CN 43-1426/N
ZDXZAC
中南大学学报(英文版)
  ISSN 2095-2899
CN 43-1516/TB
JCSTFT
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