锻压技术

Ti-6Al-2Sn-4Zr钛合金热变形行为和组织的研究

英文标题：Characteristics of hot deformation behavior and microstructure of Ti-6Al-2Sn-4Zr alloy

作者：于建民张治民张慧芳王强

单位：中北大学

分类号：TG146

出版年,卷(期):页码：2011,36(4):122-126

摘要：

采用Gleeble-3800型热模拟实验机对一种新型高温钛合金Ti-6Al-2Sn-4Zr合金的高温塑性变形进行了研究，并利用数码显微镜对金相组织进行了观察。通过研究得到变形条件（变形温度、变形速率）对其成形的力学性能和组织的影响规律。结果表明:在相变温度以下变形时，流变应力先快速升高然后逐渐平缓下降，而后趋于稳定状态,中间出现了曲线软化现象；在相变温度以上，在高应变速率时，出现应力不连续屈服现象；变形随应变速率的增加，动态再结晶晶粒细化。

The high temperature plastic deformation of a new type titanium alloy Ti-6Al-2Sn-4Cr was studied by high temperature compression test on Gleeble3800 thermalmechanical simulator,and the metallography microstructure of the alloy was investigated by digital microscope. Through the research,the law of the deformation condition on mechanical properties and microstructure were obtained.The results show that flow stress increases rapidly and then decreases gently under the phase transition temperature,then it tends to stable. As above, the phase transition temperature, in the high strain rate, stress discontinuous yield phenomenon is observed. The deformation increases with the strain rate increasing, and the grains of dynamic recrystallization are refinement.

基金项目：

山西省基础研究计划资助项目（2008021030）

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