(1. 宝钛集团有限公司 宝钛研究院，宝鸡 721014；
2. 北京有色金属研究总院 有色金属材料制备加工国家重点实验室，北京 100088)
摘 要: 通过大量添加返回料，采用电子束冷床炉单次熔炼TC4钛合金扁锭。板坯包覆后在可逆式热轧机上轧制出8 mm厚合金板材。结果表明：单向轧制工艺制备的板材，其拉伸性能优于交叉轧制工艺制备板材的伸长率略低；固溶+时效热处理可提高板材的室温拉伸强度；与真空自耗电弧熔炼相比，用电子束冷床熔炼扁锭直接轧制板材，不仅节约原料成本，而且缩短加工流程，显著降低板材的制造成本。
关键字: TC4钛合金；电子束冷床熔炼；板材；性能；低成本
（1. Baoti Research Institute, Baoti Group Ltd., Baoji 721014, China;
2. State Key Laboratory for Fabrication & Processing of Nonferrous Metals,
General Research Institute for Nonferrous Metals, Beijing 100088, China）
Abstract:Through adding enough defective material, TC4 titanium alloy slab ingot was produced by using single electron beam cold hearth melting (EBCHM), then, a sheet with thickness of 8 mm thick was manufactured on reversible hot rolling mill after cladding. The results show that the tensile property of sheet produced by one-way rolling is prior to that of cross-rolling, while the elongation is lower. Solution and aging treatment can improve the tensile strength of sheet at room temperature. Compared to vacuum arc remelting (VAR), using slab ingot produced by EBCHM to manufacture sheet can not only save prime cost of raw material, but also shorten processing procedure, so that remarkably reduce the manufacture cost.
Key words: TC4 titanium alloy; electron beam cold hearth melting; sheet; property; low cost
