Method for vacuum casting Fe2B compound
A vacuum smelting furnace and casting technology, applied in the direction of boron/boride, metal boride, etc., can solve the problems of poor corrosion resistance of the matrix and the corrosion resistance of zinc liquid, and achieve simple preparation process, dense structure, excellent quality Effect of Zinc Corrosion Resistance
Inactive Publication Date: 2013-02-06
XI AN JIAOTONG UNIV
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Problems solved by technology
Iron-boron casting alloy, one of the materials used for galvanizing tanks and zinc liquid pipelines, although the Fe in the alloy 2 Phase B has excellent zinc liquid corrosion resistance, but its matrix has poor corrosion resistance, resulting in a significant decline in the zinc liquid corrosion resistance of the cast alloy
It is often hoped that by controlling the addition of alloying elements Fe, B, etc. and the casting process to achieve reticular Fe 2 B effectively protects the matrix to improve the zinc liquid corrosion resistance of the casting alloy. The engineering application results show that although it has a certain effect, it is not ideal
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Embodiment ( 1
[0024] 1) 100 grams of pure Fe block with clean surface (surface derusting, drying; Fe content is 99.99%), ferroboron (B content is: ) 100 grams, weighed ferroboron (boron content 18.4%, Fe content 81.6%) gram; add two kinds of particle size of boron iron respectively about 2-5mm and 10-15mm, weight ratio about 1: 2) 99.4 grams, satisfy the requirement that Fe and B atomic ratio is 2: 1.
[0025] 2) Put the weighed ferroboron block and pure Fe block into the crucible in turn. The ferroboron should be compacted as much as possible and in contact with the inner wall of the crucible. The pure iron block should be placed on the top of the ferroboron block and not in contact with the inner wall of the crucible. The total volume of the two raw materials charged is about 2 / 3 of the height of the crucible.
[0026] 3) Put the crucible containing ferroboron and pure iron into the vacuum induction furnace, then put the mold into the vacuum melting furnace (can realize vacuum pouring), c...
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Abstract
The invention discloses a vacuum casting method of a Fe2B compound. The method comprises the following steps: preparing pure Fe blocks and ferroboron at an Fe / B atomic ratio of 2:1; (2) placing the ferroboron into a crucible, then placing the pure Fe blocks into the crucible, wherein the particle size of the ferroboron is less than that of the pure Fe blocks, the pure Fe blocks are placed on the upper part of the ferroboron and do not contact with the inner wall of the crucible, the total height of the ferroboron and pure Fe blocks is no more than two third of the height of the crucible; and (3) placing the crucible with the ferroboron and pure Fe into a vacuum induction furnace, and performing vacuum melting, obtaining the Fe2B bulk material. The Fe2B bulk material prepared by the methodhas the advantages of simple preparation process, more compact texture and good molten zinc corrosion resistance.
Description
technical field [0001] The invention relates to the field of molten zinc corrosion resistant alloys. With the continuous increase in the demand and output of galvanizing such as steel plates, the loss of materials such as galvanizing tanks and zinc liquid pipelines will increase accordingly. Obtaining better materials resistant to molten zinc corrosion has very important engineering application value . Bulk Fe prepared 2 Compound B is mainly used in the galvanizing industry of steel plates and other profiles. Background technique [0002] Metal corrosion brings huge losses to the national economy, and the galvanized layer is one of the most widely used surface protection methods for steel materials. Iron-boron casting alloy, one of the materials used for galvanizing tanks and zinc liquid pipelines, although the Fe in the alloy 2 Phase B has excellent corrosion resistance to molten zinc corrosion, but its matrix has poor corrosion resistance, resulting in a significant de...
Claims
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IPC IPC(8): C01B35/04
Inventor 皇志富邢建东王碧野高义民
Owner XI AN JIAOTONG UNIV