[1]赵永庆,马朝利,常 辉,等.1200 MPa 级新型高强韧钛合金[J].中国材料进展,2016,(12):041-45.[doi:10.7502/j.issn.1674-3962.2016.12.05]
　ZHAO Yongqing,MA Chaoli,CHANG Hui,et al.New High Strength and High Toughness Titanium Alloy with 1200 MPa[J].MATERIALS CHINA,2016,(12):041-45.[doi:10.7502/j.issn.1674-3962.2016.12.05]
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1200 MPa 级新型高强韧钛合金
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中国材料进展[ISSN:1674-3962/CN:61-1473/TG]

卷:
期数:
2016年第12期
页码:
041-45
栏目:
研究报告
出版日期:
2016-12-31

文章信息/Info

Title:
New High Strength and High Toughness Titanium Alloy with 1200 MPa
作者:
赵永庆; 马朝利; 常 辉; 辛社伟; 周 廉
西北有色金属研究院，北京航空航天大学，南京工业大学
Author(s):
ZHAO Yongqing;  MA Chaoli;  CHANG Hui;  XIN Shewei;  ZHOU Lian
Northwest Institute for Nonferrous Metal Research，Beihang University，Nanjing Tech University
关键词:
高强韧钛合金; 成分设计; 组织; 力学性能
DOI:
10.7502/j.issn.1674-3962.2016.12.05
文献标志码:
A
摘要:
随着飞机结构件用钛量的大幅度增加，对钛合金的性能要求也随飞机设计概念的改变而改变，在追求钛合金高强度的同时，也要求合金具有高的韧性。为设计一种强度高于1200 MPa、断裂韧性大于65 MPa·m1/2的新型高强高韧钛合金，在计算合金Mo当量的基础上，合金设计时综合考虑了合金元素对α相、β相的强化和韧化的影响，以及微观组织对强韧性的影响，设计获得一种新型高强高韧富β型的钛合金Ti-5321。实验室条件下30 kg铸锭和中试条件下500 kg铸锭试制的棒材在较理想的显微组织下，新设计的合金室温抗拉强度大于1200 MPa、延伸率大于8%、断裂韧性大于65 MPa·m1/2，相比于现有高强高韧钛合金，显示出明显优势。
Abstract:
Ti usage in airplane is obviously increasing, the requirements for Ti-alloys are changing to high strength and high toughness with the changing of airplane design concept. In order to design a new Ti-alloy with tensile strength over 1200 MPa and fracture toughness over 65 MPa·m1/2, the following factors should be paid attention to: Mo equivalent, effects of alloying elements and microstructures on strength and toughness of α phase and β phase. A new Ti alloy named as Ti5321 was designed, which is a rich-β alloy. Bars were forged from 30 kg and 500 kg ingots. With the ideal microstructure, the bars of the new alloy have a good match between strength and toughness, that is , tensile strength over 1200 MPa, elongation over 8% and fracture toughness over 65 MPa·m1/2. Compared with the TC21, Ti-5553 and Ti-55531 alloy, the new alloy possesses obvious advantages. 
更新日期/Last Update: 2017-01-07