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Abstract：
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The uniformity of chemical compositions for Ti80 titanium alloy oversized ingot in ocean engineering, and the uniformity of microstructure and the stability of mechanical properties for prepared oversized forging billet were investigated and analyzed. The results show that the main element deviation of chemical compositions at the top, middle and bottom of the prepared Ti80 titanium alloy ingot with the single weight of 11000 kg is controlled at 1000 ppm, and the deviation of oxygen element is controlled at 80 ppm, which indicates good uniformity of chemical compositions. Furthermore, there are fuzzy and uniform macrostructure as well as uniform and consistent microstructure in different positions of the prepared oversized forging billet with the sigle weight of 7500 kg for Ti80 titanium alloy. In addition, the deviations of tensile strength and yield strength in different positions and directions of forging billet are controlled within 10 MPa, the deviation of elongation is 2%, the deviation of reduction for area is 4%, and the deviation of impact energy is 5 J, which indicates small difference in mechanical properties and good performance stability.
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Funds：
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陕西省科技计划项目(S2019-YD-CGHJ-0035)
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AuthorIntro：
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杨晶（1990-），男，硕士，工程师，E-mail:cailiaoyangjing@163.com
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Reference：
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