淬火温度对Ti-4Al-4.5Mo合金马氏体类型的影响

李长富; 李阁平; 杨义; 杨柯

doi:10.3724/SP.J.1037.2010.00157

金属学报 >

2010 , Vol. 46 >Issue 9: 1061 - 1065

DOI: https://doi.org/10.3724/SP.J.1037.2010.00157

论文

淬火温度对Ti-4Al-4.5Mo合金马氏体类型的影响

李长富 ,
李阁平 ,
杨义 ,
杨柯

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1) 中国科学院金属研究所, 沈阳 110016
2) 西北有色金属研究院, 西安 710000

李长富, 男, 1979年生, 博士生

收稿日期: 2010-04-03

修回日期: 2010-05-25

网络出版日期: 2010-09-11

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INFLUENCE OF QUENCHING TEMPERATURE ON MARTENSITE TYPE IN Ti-4Al-4.5Mo ALLOY

LI Zhang-Fu ,
LI Ge-Beng ,
YANG Xi ,
YANG Ke

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1) Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016
2) Northwest Institute for Non-ferrous Metal Research, Xi'an 710016

Received date: 2010-04-03

Revised date: 2010-05-25

Online published: 2010-09-11

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摘要

对Ti-4Al-4.5Mo合金经不同固溶温度淬火处理后的相组成进行了分析. 结果表明, 当合金在相变点以上温度淬火后, 可以获得hcp结构α´马氏体; 随固溶温度降低, 淬火后斜方α´´马氏体出现, 并在一定的温度范围内与α´马氏体共存; 在800 ℃淬火, α´´马氏体消失, 合金由 α和β相构成; α´´马氏体显著降低$\beta$转变组织的硬度. EDS分析表明, Mo含量并不是决定马氏体类型的唯一因素.

关键词： 钛合金; 淬火; 马氏体; 显微硬度

本文引用格式

李长富 , 李阁平 , 杨义 , 杨柯 . 淬火温度对Ti-4Al-4.5Mo合金马氏体类型的影响[J]. 金属学报, 2010 , 46(9) : 1061 -1065 . DOI: 10.3724/SP.J.1037.2010.00157

Abstract

There are many discrepancies in the literatures concerning the martensite constitution in the α+β double phase titanium alloys after quenching, so the Ti-4Al-4.5Mo alloy was selected to analysis further the martensite phase transformation in the alloy. The results show that when the quenching temperature is above the (α+β)/β transformation temperature (925 ℃), the hexagonal martensite (α´) formed. With the decrease of quenching temperature, another kind of martensite with orthorhombic structure (α´´) appeared which can coexist with α´ in a certain temperature range. In the sample quenched at 800 ℃, the α´´ disappeared, and the alloy only contains α and β phases. The α´´ martensite reduced the hardness of martensite transformed structure remarkably. EDS analysis indicated that the content of β stabilized element (Mo) is not the only factor determining the martensitic type.

Key words： titanium alloy; quenching; martensitic phase; microhardness

参考文献

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