Process for vacuum induction melting of titaniferous hydrogen storage alloy by using CaZrO3 refractory material

Abstract

The invention discloses a process for vacuum induction melting of titaniferous hydrogen storage alloy by using a CaZrO3 refractory material. According to the process, a crucible made of CaZrO3 refractory materials is used to prepare titaniferous hydrogen storage alloy by using the vacuum induction melting technology, using the component titaniferous hydrogen storage alloy as a raw material and an inert gas as a protective gas or under the vacuum condition; an infrared temperature measurement instrument is used to measure the melting temperature; the temperature rising speed of melting is controlled to be 1-50 DEG C / min by adjusting the power of a vacuum induction furnace, and the melting temperature is controlled to be 10-50 DEG C higher than the melting point of the titaniferous hydrogen storage alloy, and the melting time is 10-120 minutes. Based on relevant detection, the oxygen content of the titaniferous hydrogen storage alloy melted by the process is low, the alloy components are effectively controlled, the alloy is easily activated and easily absorbs and desorbs hydrogen at room temperature, and the hydrogen absorption amount is large.

Description

technical field [0001] The present invention relates to a kind of CaZrO 3 The invention discloses a method for vacuum induction smelting a titanium-containing hydrogen storage alloy of a refractory material, belonging to the technical field of vacuum metallurgy smelting. Background technique [0002] Hydrogen storage alloys are composed of elements A (such as La, Zr, Mg, V, Ti, etc.) that are easy to form stable hydrides and other elements B (such as Cr, Mn, Fe, Co, Ni, Cu, Zn, Al, etc.) An intermetallic compound that reacts with hydrogen to form a metal hydride and reversibly releases hydrogen under appropriate conditions. At present, the hydrogen storage alloys that have reached industrial practical value mainly include rare earth series (AB 5 type), Laves phase series (AB 2 type), magnesium series (A 2 B type) and titanium series (AB type) four series. [0003] AB-type titanium-based hydrogen storage alloys mainly refer to TiFe, TiCr, TiV and multi-element alloys bas...

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Problems solved by technology

[0005] At present, based on reducing energy consumption and saving costs, oxide refractory crucibles can be used as melting vessels for titanium-containing alloys. However, in the high-temperature molten state, titanium has high chemical activity. Common oxide refractory materials, such as Al 2 o 3 , MgO, SiO 2 , ZrO 2 etc. will react violently with Ti liquid at high temperature, so these ordinary refractory materials, such as magnesia, alumina and silicon oxide, are not suitable for use as reaction vessels for smelting titanium-containing alloys, but the thermodynamic calculation results show that: in CaO- ZrO 2 In the binary system, CaZrO 3 The refractory material is a refractory compound with a melting point as high as 2612K. It is a compound with stable thermodynamic properties. It can be used as a high-temperature solid electrolyte, high-temperature structural ceramics and refractory materials. The research on the Ca-Zr-Ti-O system shows that there are research reports pointed out that with CaZrO 3 as the basis, adding a certain amount of CaTiO 3 , can form a more stable compound, as a refractory material, the degree of reaction in contact with Ti is very low, and it may be used as a new type of refractory material for melting titanium-containing hydrogen storage material alloys

At present, domestic and foreign to CaZrO 3 It has been spread out, but the research field is mostly limited to the iron and steel industry, and the application in the smelting of titanium-containing hydrogen storage materials has not been widely carried out, but some studies have compared ZrO 2 , CaO, CaZrO 3 Several refractory materials such as CPTi and Ti are cast 6 Al 4 The application of V, the results show that CaZrO 3 The advantages of ZrO are excellent hydration resistance, no defects on the surface, sufficient strength, and thermal stability not weaker than CaO. It can be considered that CaZrO 3 It is a very potential refractory material for smelting titanium-containing hydrogen storage alloys, so the present invention tries to use highly stable CaZrO 3 Refractory Crucible and Vacuum Induction Furnace for Melting Titanium-containing Hydrogen Storage Alloys

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