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Preparation method of high-wear-resistance and high-corrosion-resistance protective layer of hot work die steel

A hot work die steel, high wear-resistant technology, applied in the field of die steel, can solve the problem of the decrease of the bonding strength between the coating and the base material, and achieve the effect of high bonding strength

Inactive Publication Date: 2020-04-14
安徽旭通网络科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, because the supersonic sprayed WC-Co(Cr) coating and the substrate are mainly bonded mechanically, the bonding strength between the coating and the substrate decreases under long-term high temperature and high pressure environments.

Method used

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  • Preparation method of high-wear-resistance and high-corrosion-resistance protective layer of hot work die steel
  • Preparation method of high-wear-resistance and high-corrosion-resistance protective layer of hot work die steel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A method for preparing a high wear-resistant and high-corrosion protective layer of hot work die steel 4Cr5MoSiV1, comprising the following steps:

[0032] (1) Put the hot-working die steel in absolute ethanol, clean it with an ultrasonic cleaner for 40 minutes, take it out, and dry it; then use a sandblasting machine to perform sandblasting of brown corundum.

[0033] (2) Preheat the hot work die steel treated in step (1) to make the surface temperature reach 220°C, then spray a layer of coating on the surface of the die steel by supersonic flame spraying method, and use compressed air to cool after spraying , the coating thickness is 300μm; the process parameters of the supersonic flame spraying method are: oxygen flow rate 300L / min, propane flow rate 80 L / min, powder feeding rate 42g / min, spraying distance 260mm.

[0034] The spraying powder is composed of the following components by weight: WC: 60%, TaC: 15%, VC: 4%, Nano Y 2 o 3 : 1.1%, the balance being NiCr.

...

Embodiment 2

[0039] A method for preparing a high wear-resistant and high-corrosion protective layer of hot work die steel 5CrMnMoSiV, comprising the following steps:

[0040] (1) Put the hot-working die steel in absolute ethanol, use an ultrasonic cleaner to clean it for 40 minutes, take it out, and dry it; then use a sandblasting machine to perform sandblasting of brown corundum;

[0041] (2) preheating the hot work die steel treated in step (1) to make the surface temperature reach 230°C, then spray a layer of coating on the surface of the die steel by supersonic flame spraying method, and use compressed air to cool after spraying, The thickness of the coating is 280 μm; the process parameters of the supersonic flame spraying method are: oxygen flow rate 260L / min, propane flow rate 80 L / min, powder feeding rate 38g / min, spraying distance 280mm.

[0042] The spraying powder is composed of the following components by weight: WC: 62%, TaC: 14%, VC: 4%, Nano Y 2 o 3 : 0.8-1.5%, the balanc...

Embodiment 3

[0047] A method for preparing a high wear-resistant and high-corrosion protective layer of hot work die steel 4Cr5MoSiV1, comprising the following steps:

[0048] (1) Put the hot-working die steel in absolute ethanol, clean it with an ultrasonic cleaner for 40 minutes, take it out, and dry it; then use a sandblasting machine to perform sandblasting of brown corundum.

[0049] (2) Preheat the hot work die steel treated in step (1) to make the surface temperature reach 230°C, then spray a layer of coating on the surface of the die steel by supersonic flame spraying method, and use compressed air to cool after spraying , the coating thickness is 300 μm; the process parameters of the supersonic flame spraying method are: oxygen flow rate 320L / min, propane flow rate 82 L / min, powder feeding rate 40g / min, spraying distance 240mm.

[0050] The spraying powder is composed of the following components by weight: WC: 64%, TaC: 12%, VC: 4%, Nano Ce 2 o 3 : 0.8%, the balance being NiCr. ...

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Abstract

The invention provides a preparation method of a high-wear-resistance and high-corrosion-resistance protective layer of hot work die steel, and relates to the technical field of die steel. The preparation method of the protective layer comprises the following steps: (1) carrying out surface purification treatment and surface roughening treatment; (2) carrying out preheating treatment, then spraying a coating by adopting a hypersonic flame spraying method, carrying out compressed air cooling, and the spraying powder being prepared from the following components in percentage by weight: 55 to 64percent of WC, 12 to 18 percent of TaC, 3 to 4.5 percent of VC, 0.8 to 1.5 percent of nano rare earth oxide and the balance of NiCr; and (3) carrying out carburizing treatment, quenching and tempering. According to the method, the hot work die steel is subjected to surface roughening treatment, hypersonic flame spraying, carburizing treatment, quenching and tempering, so that a high-wear-resistance and high-corrosion-resistance coating can be formed on the surface of the hot work die steel, the bonding strength between the coating and a base body is high, and excellent surface protection and strengthening can be formed on the hot work die steel.

Description

technical field [0001] The invention relates to the technical field of die steel, in particular to a method for preparing a high wear-resistant and high-corrosion protective layer of hot-work die steel. Background technique [0002] Hot work die steel is a very important steel type in the die industry. It is mainly used to press metals above the recrystallization temperature into workpieces, generally including hot extrusion dies, hot forging dies, die-casting dies and isothermal forging dies. Compared with cold work dies, the surface of hot work die steel is subject to high-intensity alternating stress and repeated contact with high-temperature materials. Under such a harsh working environment, the service life of the die is generally shorter, and the surface of the steel body It is prone to cracking, plastic deformation and wear, etc., and eventually makes the hot work die invalid. [0003] Hot work dies will inevitably fail after a period of service. If some precision a...

Claims

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Application Information

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IPC IPC(8): C23C4/129C23C4/06C23C8/22C23C8/80C23C28/04C23F17/00
CPCC23C4/06C23C4/129C23C8/22C23C8/80C23C28/04C23F17/00
Inventor 郑西
Owner 安徽旭通网络科技有限公司
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