A kind of preparation technology method of titanium and titanium alloy EB ingot

Abstract

The invention relates to a process method for preparing titanium and titanium alloy EB ingots, which adopts a raw material mixing and boxing smelting process, including the steps of box preparation, batching weighing, mixing, boxing, EB smelting and the like, wherein the material box is made of material The box body is composed of a partition device. The partition device is used to divide the material box into several small cells, which greatly reduces the weight of each mixing and significantly improves the uniformity of EB smelting raw materials. It can effectively avoid the abnormal situation of falling molten pool, deflection and material blocking at the tail of the material box during the continuous horizontal feeding smelting process, and improve the stability of the feeding smelting, thereby effectively improving the composition uniformity of titanium and titanium alloy EB ingots. The preparation method provided by the present invention does not need to invest in a large-scale electrode press, does not need to perform briquetting and welding electrodes, can improve smelting efficiency, reduce burning loss, improve composition uniformity, and has the advantages of short process and low cost.

Description

technical field [0001] The invention relates to the technical field of titanium material processing, in particular to a preparation process method of titanium and titanium alloy EB ingots. Background technique [0002] Titanium and titanium alloys have the advantages of high specific strength, corrosion resistance, and good biocompatibility, and have broad application prospects in the fields of aerospace, shipbuilding, chemical industry, biomedicine, transportation, sports and leisure, and daily necessities. However, the high cost limits the further promotion and application of titanium materials. Among them, reducing the cost of smelting and blanking titanium and titanium alloys is the main research direction of the industry. [0003] The traditional smelting method of titanium and titanium alloys is vacuum consumable arc smelting (VAR). The billet required for the plate has a long manufacturing process and high cost. Electron beam cooling furnace (EB furnace) can directl...

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Problems solved by technology

[0004] Existing titanium and titanium alloy EB smelting technology, when it is necessary to add AlV, TiO 2 When alloying elements such as TC4 (Ti-6Al-4V) titanium alloy EB ingot, TA2 cold-rolled thin strip EB ingot, etc., in order to improve the uniformity of the composition, it is necessary to pass through mixing, pressing electrodes, solder resist electrodes, and then through horizontal Feed materials for EB smelting, this method needs to invest in special equipment such as large presses (generally more than 4,000 tons of pressure), the equipment investment is large, and the preparation process is long; at the same time, the raw material pressed electrodes are compact and dense, and the density is generally 3.0~4.2g / cm3, which is close to the density of titanium metal. During the EB smelting process, the electron beam heat source is irradiated on the front end of the electrode to melt the end face. Due to the high density of the compact and the large thermal conductivity effect, compared with the smelting of sponge titanium bulk material, the electrons per unit weight of the raw material are required for melting. The beam irradiation time is long and the burning loss is large, resulting in low melting rate and high burning loss rate; in addition, in the process of continuous smelting and feeding, switching and connecting multiple electrode bars, it is very easy for the tail of the electrode bar to fall into the molten pool , Feed deflection out of the melting pattern area, or even blockage, etc., affect the consistency and stability of feed and melting rates, and further affect the uniformity of alloy element composition

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