摘要
以新型β型Ti3Mo3Zr2Sn25Nb合金铸锭为实验原料,通过开坯、锻造、轧制、挤压、热处理等工序制成棒、板、管材。利用力学试验机、光学显微镜研究不同加工工艺及热处理对合金性能和组织影响。研究发现:Ti3Mo3Zr2Sn25Nb合金有较好的冷、热加工性能,无明显的各向异性,且具有一定超弹性。在β相区固溶热处理后主要由亚稳β相组成,低温时效后亚稳β相分解形成大量次生α相,从而使合金产生时效强化,达到高强度、低模量化和优良塑韧性、疲劳性能的综合匹配。
The alloy ingots of novel near-＂type Ti3Mo3Zr2Sn25Nb alloy were used as experimental raw material,and the bar,the plate and the pipe were prepared followed by the processes of blanching,forging,rolling,extruding and heat treatment. The effects of different processing techniques and heat treatment on the properties and microstructure of the alloy were studied by mechanical testing machine and optical microscope. The results showed that the Ti3Mo3Zr2Sn25Nb alloy had good cold and hot workability,no obvious anisotropy,and had good super-elasticity. It was mainly composed of metastable β phase after solution heat treatment in beta phase region,and a large number of secondary alpha phase appeared after low temperature aging from metastable β phase. Thus the aging hardening of the alloy was produced,to achieve a comprehensive match of high strength,low modulus,excellent plasticity and fatigue properties.
作者
张亚峰
于振涛
余森
贺新杰
麻西群
程军
王昌
赵曦
ZHANG Ya-feng;YU Zhen-tao;YU Sen;HE Xin-jie;MA Xi-qun;CHENG Jun;WANG Chang;ZHAO Xi(Northwest Institute for Nonferrous Metal Research,Shaanxi Key Laboratory ofBiomedical Metal Materials,Shaanxi Xi蒺an 710016,China)
出处
《广州化工》
CAS
2018年第10期52-55,共4页
GuangZhou Chemical Industry
基金
陕西省重点科技创新团队(2016KCT-30)
陕西省重点项目-社会发展领域(2017ZDXM-SF-039)
关键词
加工与热处理
微观组织
力学性能
Β型钛合金
processing and heat treatment
microstructure
mechanical properties
β-type Ti alloys
