热等静压保温温度对TC4合金组织及拉伸性能的影响

兰州理工大学学报 ›› 2021, Vol. 47 ›› Issue (1): 1-4.

• 材料科学与工程 • 下一篇

热等静压保温温度对TC4合金组织及拉伸性能的影响

陈剑虹^1,2, 肖乐^1,2, 陈永庆^1,2, 闫英杰^1,2, 曹睿^1,2

1.兰州理工大学有色金属先进加工与再利用省部共建国家重点实验室, 甘肃兰州 730050;
2.兰州理工大学材料科学与工程学院, 甘肃兰州 730050

收稿日期:2020-04-15 出版日期:2021-02-28 发布日期:2021-03-11
作者简介:陈剑虹(1937-),男,浙江杭州人,教授,博导.
基金资助:
国家自然科学基金(51961024,51761027)

The effect of hot isostatic pressing temperature on the microstructure and tensile properties of TC4 alloy

CHENG Jian-hong^1,2, XIAO Le^1,2, CHEN Yong-qing^1,2, YAN Ying-jie^1,2, CAO Rui^1,2

1. State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals, Lanzhou Univ. of Tech., Lanzhou 730050, China;
2. College of Materials Science and Engineering, Lanzhou Univ. of Tech., Lanzhou 730050, China

Received:2020-04-15 Online:2021-02-28 Published:2021-03-11

摘要/Abstract

摘要： 通过热等静压近净成形技术制备的TC4合金具有独特的优势,近年来受到大量关注.研究了热等静压保温温度对TC4合金显微组织及拉伸性能的影响.结果表明:120 MPa、2 h保压条件下,保温温度达到800 ℃时,合金完全致密化;随着保温温度从800 ℃升高到920 ℃,合金的抗拉强度从942 MPa降为920 MPa,拉伸应变从13.7%增加到18.1%;合金显微组织中β相的体积分数随保温温度升高而增加,且分布趋于均匀化,β相的增加是合金强度降低、塑性增加的主要原因.

关键词: TC4合金, 热等静压保温温度, 组织演变, 拉伸性能

Abstract: The preparation of TC4 alloy by powder NNS-HIP has received widespread attentions in recent years due to its unique advantages. In this research, effects of hot isostatic pressing temperature on the microstructure and tensile properties of TC4 alloy were systematically investigated. The experimental results show that the alloy is completely densified when the holding temperature reaches 800 ℃ under the holding pressure condition of 120 MPa for 2 hours; As the holding temperature increases from 800 ℃ to 920 ℃, the tensile strength of the alloy decreases from 942 MPa to 920 MPa, and the tensile strain increased from 13.7% to 18.1%; The volume fraction of β phase in the alloy microstructure increases with the rise of the holding temperature, and the distribution of β phase tends to be uniform as a result. The addition in β phase is a key factor for the decline in strength and ascent in plasticity of the alloy.

Key words: TC4 alloy, hot isostatic pressing holding temperature, microstructure evolution, tensile properties

中图分类号:

TG146

陈剑虹, 肖乐, 陈永庆, 闫英杰, 曹睿. 热等静压保温温度对TC4合金组织及拉伸性能的影响[J]. 兰州理工大学学报, 2021, 47(1): 1-4.

CHENG Jian-hong, XIAO Le, CHEN Yong-qing, YAN Ying-jie, CAO Rui. The effect of hot isostatic pressing temperature on the microstructure and tensile properties of TC4 alloy[J]. Journal of Lanzhou University of Technology, 2021, 47(1): 1-4.

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热等静压保温温度对TC4合金组织及拉伸性能的影响

The effect of hot isostatic pressing temperature on the microstructure and tensile properties of TC4 alloy

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