高强度TC18钛合金β锻造工艺参数与组织和性能的定量关系
The Relationship among Forging Parameters, Microstructure and Properties of High Strength TC18 Titanium Alloy Forging in β Zone
摘 要
采用普通模锻试验方法, 研究了TC18高强度β锻造钛合金工艺参数与显微组织和力学性能之间的定量关系。结果表明: 可以用一个新参数ζ(β锻造综合参数)来表征以上加热温度与相变点温差T和单相区保温时间t对合金力学性能的综合影响; 当取ζ＝T＋0.1t时, 合金的断面收缩率ψ、冲击韧度aKU随ζ上升而线性下降; 断裂韧度KIC、疲劳极限σD与ζ之间具有峰值关系; ζ与合金β晶粒平均直径D线性相关。
锻造工艺
显微组织
力学性能
high strength titanium alloy TC18
forging technology
microstructure
mechanical property
Abstract
The TC18 titanium alloy was deformed by conventional die forging. The relationship among β forging parameters, microstructure and mechanical properties of high strength titanium was been studied. The results show that the heating temperature above Tβ(T) and holding time in β zone(t) could be simplified as a new parameter (β forging integrate parameter) ζ.While the value of ψ(reduction of area) and impact toughness aKU descended linearly with the increase of ζ; fracture toughness KIC and fatigue limit σD had a peak relations with ζ; and average grain diameter D had a linear correlation.
中图分类号 TG146.23
所属栏目 材料性能及其应用
基金项目
收稿日期 2011/11/22
修改稿日期 2012/10/1
网络出版日期
作者单位点击查看
备注沙爱学(1976－), 女, 山东烟台人, 研究员, 博士。
引用该论文: SHA Ai-xue,LI Xing-wu,WANG Qing-ru. The Relationship among Forging Parameters, Microstructure and Properties of High Strength TC18 Titanium Alloy Forging in β Zone[J]. Materials for mechancial engineering, 2012, 36(12): 49～52
沙爱学,李兴无,王庆如. 高强度TC18钛合金β锻造工艺参数与组织和性能的定量关系[J]. 机械工程材料, 2012, 36(12): 49～52
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【4】BRUN M, SHACHANOVA G. Principles of titanium alloys′ structure control with the purpose of increasing their mechnanical properties[C]//WEISS I, SRINVASAN R, BANIA P J, et al. Advances in the Science and Technology of Titanium Alloy Processing. Anaheim: TMS, 1997: 193-199.
【5】王新平, 孟祥军, 刘茵琪.热变形参数对亚稳定β型钛合金组织和性能的影响[J]. 金属学报, 1999, 35(增1): 456-459.
【6】朱知寿, 王庆如, 郑永灵, 等. 损伤容限型钛合金新型β锻造工艺[J]. 中国有色金属学报, 2004, 14(增3): 13-16.
【7】盛险峰, 丁志文, 朱益藩. 变形量和热处理工艺对Ti-5Al-5Mo-5V-1Cr-1Fe钛合金组织和性能的影响[J]. 金属学报, 1999, 35(增1): 465-468.
【8】沙爱学, 李兴无.热变形温度对TC18钛合金显微组织和力学性能的影响[J]. 中国有色金属学报, 2005, 15(8): 1167-1172.
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