Titanium alloy has the advantages of low density, high specific strength, good corrosion resistance, good process performance, so it is increasingly widely used in aviation, aerospace, chemical industry, shipbuilding and other industrial sectors, rapid development. Titanium alloys are particularly suitable for aerospace components such as gas turbines. Because of its excellent corrosion resistance, good mechanical properties, and qualified histocompatibility, titanium and its alloys are used to make biomaterials such as prosthetic devices.
The titanium alloy is used for casting complex titanium alloy components, especially some military products components have low hardness, poor wear resistance and stability, which affect the product quality. Compared with conventional titanium alloy, the hardness of the alloy can be stably controlled within the range of HRC38 ~ 42, with high hardness and good comprehensive mechanical properties, which can be used in the development and production of titanium alloy parts requiring certain hardness and good comprehensive mechanical properties.
The alloy can be fused by vacuum consumable electric arc shell furnace, vacuum induction arc furnace, electron beam furnace and other common titanium alloy melting equipment, the forming way can be graphite type, metal type or all kinds of investment casting shell.
BT20 bar and metal chromium as raw materials, BT20 titanium alloy nominal composition Ti-6Al-2Zr-1Mo-1V titanium alloy, after cleaning treatment (degreased, degreased, decontamination, drying), metal chromium by mechanical crushing method into a certain particle of metal sand, size requirements < LMM, The drilling machine is used to drill holes on the BT20 spindle. The hole size is O10 ~ 20mm and the depth is 0.5 ~ 0.8r (R is the spindle radius), which is evenly distributed in the middle and lower part of the spindle. The metal chromium powder or particles are loaded into the hole on the spindle according to a certain ratio. The BT20 electrode is sealed by bustard argon arc welding, and the consumable electrode is welded together.
