TC16钛合金板材冷轧工艺及组织性能研究

Research on Volatilization Law of Multi-component Titanium Alloy in Electron Beam Cold Hearth Melting

摘要:

进行了TC16钛合金板材多道次冷轧试制,利用光学显微镜、扫描电镜和X射线衍射等手段研究了变形量对冷轧板材微观组织与力学性能的影响。结果表明:α+β两相TC16钛合金板材冷轧加工是可行的,其极限冷变形量达到79%,冷轧板材表面无裂纹。大幅度冷轧变形后,TC16钛合金组织为分布均匀的纤维状结构,且存在极少量未充分变形的α晶粒,并伴有应变诱导的α″马氏体相产生;抗拉强度和显微硬度均得到较大程度的提高,发生明显的冷形变强化。

Abstract:

The multi-pass cold-rolled tests of TC16 titanium alloy sheets were produced. The effect of deformation on microstructures and mechanical properties of cold-rolled sheets were studied by optical microscope,scanning electron microscope and X-ray diffraction. The results show that the cold rolling of α + β two-phase TC16 titanium alloy sheets is feasible,and the limit cold deformation can reach 79% without any cracks on the surface. After large-scale cold rolling deformation,the TC16 titanium alloy microstructure becomes a uniformly distributed fibrous structure,and they are few incompletely deformed α grains,accompanied by strain-induced α″ martensitic phase. Meanwhile,the improvement of tensile strength and microhardness,and obvious cold deformation strengthening is obtained.