Carbon and boron complex seeping treatment process of Mg-Cr refractory product mould

A technology of refractory products and processing technology, applied in the direction of metal material coating technology, coating, solid diffusion coating, etc., to achieve the effect of improving wear resistance and durability

Inactive Publication Date: 2009-05-06
JINZHOU BEIFANG REFRACTORY MOLD
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problems existing in the existing mold heat treatment process of magnesium-chromium refractory products, and to provide a carbon-boron composite infiltration treatment process for magnesium-chromium refractory product molds suitable for mass industrial production

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  • Carbon and boron complex seeping treatment process of Mg-Cr refractory product mould
  • Carbon and boron complex seeping treatment process of Mg-Cr refractory product mould

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Embodiment Construction

[0012] The present invention is described in detail below: 1, mold is carried out carburizing treatment, and its heating temperature is 920 ℃, and heat preservation 8 hours, box cooling then, does not quench; Make steel surface have 1.0 carbon concentration, carburizing layer depth is 1.5mm, carburizing The layer is cooled in the infiltration agent to prevent oxidation. 2. Carry out boronizing treatment on the mold again. Before packing the mold, grind and polish the sundries and oxides on the surface of the mold, and wipe and dry them with alcohol; Made of heat-resistant steel), the mold is spaced at a gap of 20mm in the box, and the boronizing agent is placed in the gap to fill it, cover the box cover and seal it with refractory soil; put it in a box-type electric furnace for boronizing treatment.

[0013] The boronizing agent used in this invention adopts 7% of boron donor, 10% of infiltration agent, and the rest is filler.

[0014] The boron supplying agent adopts industr...

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Abstract

The invention provides a magnesium chromium fireproof product die carbon and a boron combined penetration treatment process suitable for mass industrial production. In the process, the die is subjected to carburizing treatment and then the boriding treatment; before packaging, impurities and oxides remained on the surface of the die are milled and polished, and cleaned by alcohol and dried; and the die is placed in a boriding box, and the boriding box is placed in a box furnace for boriding treatment. The process has the advantages that for the abnormal 20Cr magnesium chromium fireproof product die with large overall dimension of more than 500 to 1,000mm and complex shape, after the combined treatment of carbon penetration and boron penetration, the depth of penetration is between 0.08 and 0.12mm, the hardness is between 1,300 and 1,500HV, and the wearing resistance and the endurance are both sunstantially improved.

Description

technical field [0001] The invention belongs to a mold heat treatment process, in particular to a carbon-boron composite infiltration treatment process for a mold of a magnesium-chromium refractory product. Background technique [0002] There are many heat treatment processes, such as carburizing, quenching, boronizing, nitriding treatment processes, etc. The choice of heat treatment process is mainly determined according to the shape, structure and technical requirements of the component. At present, the molds of magnesium-chromium refractory products are mostly made of Q235 and 20Cr materials, and the traditional heat treatment process is adopted, that is, quenching after carburizing. Due to the low surface hardness of the magnesium-chromium refractory product mold treated by this process, the hardness is 58-62HRC, so its wear resistance, corrosion resistance and heat resistance are poor. In high-pressure friction presses, high-hardness magnesium Under the action of sand,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C8/34
Inventor 李焕春李鑫
Owner JINZHOU BEIFANG REFRACTORY MOLD
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