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High temperature-resistant treatment process of mould

A treatment process and high-temperature-resistant technology, which is applied in the direction of metal material coating process, coating, solid-state diffusion coating, etc., can solve the problem that the crack resistance and thermal fatigue resistance of the mold cannot meet the ideal requirements, and achieve the durability Improved abrasiveness and toughness, improved crack resistance and thermal fatigue resistance, and extended service life

Inactive Publication Date: 2015-03-04
杨帆
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Existing hot work dies generally use low-alloy quenched and tempered die steel, medium chromium hot work die steel or tungsten hot work die steel for cutting, grinding and other processing, and the crack resistance and thermal fatigue resistance of the die are still not up to the standard. to ideal requirements

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] Mold high temperature treatment process, including the following steps:

[0013] (1) Degrease, wash and dry the surface of the mold;

[0014] (2) Carry out carbonitriding treatment on the surface of the mold;

[0015] (3) After the carbonitriding is completed, the surface is nickel-plated.

[0016] In the high-temperature-resistant treatment process for hot work molds, the degreasing of the mold surface refers to cleaning the mold surface with a sulfuric acid solution with a mass concentration of 8%.

[0017] The high temperature resistant treatment process of the hot work mold, the carbonitriding treatment refers to putting the hot work mold into the carburizing furnace at a furnace temperature of 600°C, and feeding 35% ammonia and 60% exothermic gas At the same time, drop methanol at a flow rate of 230 drops / min for 4 hours, raise the furnace temperature to 770 ° C, and infiltrate for 1.5 hours.

[0018] In the high-temperature-resistant treatment process of the ho...

Embodiment 2

[0020] The difference between this example and Example 1 is that the carbonitriding treatment refers to putting the hot work mold into the carburizing furnace at a furnace temperature of 700°C, feeding 50% ammonia and 50% exothermic At the same time, drop methanol at a flow rate of 230 drops / min for 5 hours, raise the furnace temperature to 770°C, and infiltrate for 4.5 hours.

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PUM

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Abstract

The invention discloses a high temperature-resistant treatment process of a mould. The high temperature-resistant treatment process comprises the following steps of: (1) deoiling, washing and drying the surface of the mould; (2) carrying out carbonitriding treatment on the surface of the mould; (3) after the carbonitriding treatment is completed, carrying out surface nickel-plating treatment. According to the high temperature-resistant treatment process, the cut and ground mould is greatly enhanced in rigidity, strength, red-hardness, abrasion resistance and toughness and outstandingly enhanced in crack resistant capacity and heat fatigue resistant property by being subjected to surface carbonitriding treatment and chemical plating treatment, so that the service life of the mould is prolonged.

Description

technical field [0001] The invention relates to the field of molds, in particular to a mold high-temperature-resistant treatment process. Background technique [0002] Because the mold works under the condition of temperature, it is required that the hot work mold should not only have high hardness, strength, red hardness, wear resistance and toughness, but also have good high temperature strength, thermal fatigue stability, thermal conductivity and resistance In addition, high hardenability is required. In order to ensure the service life of the mold, the mold must be cooled, and cracks will appear in the hot and cold alternating mold, that is, thermal fatigue cracks, so the material is required to have crack resistance and thermal fatigue resistance. performance. Existing hot work dies generally use low-alloy quenched and tempered die steel, medium chromium hot work die steel or tungsten hot work die steel for cutting, grinding and other processing, and the crack resistan...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C8/30
CPCC23C8/30
Inventor 杨帆
Owner 杨帆