自然科学版 英文版
自然科学版 英文版
自然科学版 英文版

您目前所在的位置:首页 - 期刊简介 - 详细页面

中南大学学报(自然科学版)

Journal of Central South University

第30卷    第1期    总第125期    1999年2月

[PDF全文下载]    [Flash在线阅读]

    

文章编号:(1999)01-52-3
用循环热处理细化铸造TiAl基合金的显微组织
彭超群;黄伯云;贺跃辉;刘咏;孟力平

(中南工业大学粉末冶金国家重点实验室)

摘 要: 设计了一种新的循环热处理工艺,并用 正交设计试验(L16(45))研究了各热处理工艺参数,即加热速度、保温温度、保温时间、冷却速度和循环次数对铸造TiAl基合金显微组织和显微硬度 (HV5)的影响.结果表明:循环热处理工艺均能不同程度地提高显微硬度,提高的最大幅度达40%;各因素的影响按大小排列依次为加热速度,保温时间、保 温温度、冷却速度、循环次数.利用循环热处理可获得不同类型的显微组织.在正交试验的基础上确定了优化的热处理工艺,并用它获得了细小的显微组织.

 

关键字: TiAl基合金;循环热处理;显微组织;显微硬度

MICROSTRUCTURAL REFINEMENT OF AS CAST TiAl BASED ALLOY BY CYCLIC HEAT TREATMENTS
Peng Chaoqun Huang Baiyun He Yuehui Liu Yong Meng Liping

State Key Laboratory for Powder Metallurgy, Central South University of Technology, Changsha, 410083, China

Abstract:A novel cyclic heat treatment technology was designed, and the effects of the various technological parameters, i. e. heating rate, holding temperature, holding time, cooling rate and cycle number, on the microhardness and the microstructures of a Ti33Al3Cr cast alloy were studied using the orthogonal design method (L 16 (4 5)). The results show that the cyclic heat treatments can increase the microhardness in varying degrees and the largest increasing amplitude is up to 40%. The effects of the various technological parameters from large to small are in the following order: heating velocity, holding time, holding temperature, cooling velocity and cycle number. Several typical microstructures were obtained by the cyclic heat treatments. Based on the orthogonal test, the optimized technologies were determined and fine lamellar microstructures were produced. 

 

Key words: TiAl based alloy; cyclic heat treatments; microstructures; microhardness

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
版权所有:《中南大学学报(自然科学版、英文版)》编辑部
地 址:湖南省长沙市中南大学 邮编: 410083
电 话: 0731-88879765 传真: 0731-88877727
电子邮箱:zngdxb@csu.edu.cn 湘ICP备09001153号