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Wear resistant carbide coating and production method thereof

A carbide and coating technology, applied in coating, metal material coating process, etc., can solve problems such as low production efficiency, low coating bonding strength, and demanding production equipment

Active Publication Date: 2015-04-22
XIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the methods for preparing carbide coatings include chemical vapor deposition, physical vapor deposition, thermal spraying, thermal diathermy, etc., but these methods have the disadvantages of demanding production equipment, low production efficiency, and low coating bonding strength.

Method used

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  • Wear resistant carbide coating and production method thereof
  • Wear resistant carbide coating and production method thereof
  • Wear resistant carbide coating and production method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0080] Embodiment 1: the preparation method of carbide coating, comprises the steps:

[0081] 1. Prepare a tungsten plate 1 first, wherein the purity of tungsten should be controlled at 99.7%. The tungsten plate 1 is first surface treated, and the steps are as follows:

[0082] The first step is pickling, choose 300ml / L hydrochloric acid, and then rinse with running water;

[0083] In the second step of pickling, choose 300ml / L hydrofluoric acid, and then rinse with running water;

[0084] The third step is surface grinding, using 800 mesh Al 2 o 3 Sandpaper and finally ultrasonic cleaning with alcohol.

[0085] The thickness of the tungsten plate 1 is controlled at 0.2mm.

[0086] 2. The Q275A substrate is smelted into molten steel, and the temperature is controlled at 1630°C.

[0087] 3. Pour the above-mentioned molten steel into the sand mold 2 on which the above-mentioned tungsten plate 1 is placed, such as figure 1 As shown, the pouring temperature is controlled at ...

Embodiment 2

[0095] Embodiment 2: the preparation method of carbide coating, comprises the steps:

[0096] 1. Prepare a tungsten plate 1 first, in which the purity of tungsten should be controlled at 99.8%.

[0097] The tungsten plate 1 should be surface treated first, the steps are as follows:

[0098] In the first step of pickling, choose 60ml / L phosphoric acid, and then rinse with running water;

[0099] In the second step of pickling, choose 200ml / L sulfuric acid, and then rinse with running water;

[0100] The third step is surface grinding, using 1000 mesh Al 2 o 3 Sandpaper and finally ultrasonic cleaning with alcohol.

[0101] The thickness of the tungsten plate 1 is controlled at 0.8mm.

[0102] 2. The Q255AF base material is smelted into molten steel, and the temperature is controlled at 1630°C.

[0103] 3. Pour the above molten steel into the sand mold 2 with the above tungsten plate 1 placed, the pouring temperature is controlled at 1630°C, the pouring time is 40 seconds,...

Embodiment 3

[0111] Embodiment 3: the preparation method of carbide coating, comprises the steps:

[0112] 1. Prepare a tungsten plate 1 first, in which the purity of tungsten should be controlled at 99.8%. The tungsten plate 1 should be surface treated first, the steps are as follows:

[0113] The first step is pickling, choose 120ml / L hydrogen peroxide, and then rinse with running water;

[0114] In the second step of pickling, choose 240ml / L hydrogen peroxide, and then rinse with running water;

[0115] The third step is surface grinding, using 1200 mesh Al 2 o 3 Sandpaper and finally ultrasonic cleaning with alcohol. The thickness of the tungsten plate 1 is controlled at 1mm.

[0116] 2. Smelt the 45 steel base material into liquid steel, and the temperature is controlled at 1620°C.

[0117] 3. The above liquid steel is poured into the sand mold 2 with the above tungsten plate 1 placed, the pouring temperature is controlled at 1620°C, after cooling, a composite body with 45 steel...

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Abstract

A wear resistant carbide coating comprises a quasi monocrystalline phase WC dense ceramic layer, and further comprises a micrometer WC ceramic layer and a WC-substrate fusion layer. The quasi monocrystalline phase WC dense ceramic layer, the micrometer WC ceramic layer and the WC-substrate fusion layer are sequentially distributed in a gradient manner. The coating can be applied to the surface of the carbon steel. The carbide coating is formed on the surface of the carbon steel through the cast steel substrate and tungsten complex, the introduction of an external carbon source, heating and heat insulation, the coating and the substrate are metallurgically bonded, and the bonding force is very strong, so the problems of non-metallurgic bonding between present hard particles and the steel substrate, very weak bonding force and easy shedding of the particles are overcome, and the wear resistance of the surface of the carbon steel is greatly improved.

Description

technical field [0001] The invention relates to a wear-resistant carbide coating and a preparation method thereof, in particular to a composite wear-resistant carbide coating and a preparation method thereof, in particular to a composite wear-resistant carbide coating applied to the surface of carbon steel and its preparation method. Background technique [0002] Carbide materials have the characteristics of high hardness and excellent wear resistance. Covering the surface of metal alloy substrates by coating can improve the wear resistance and life of parts made of substrate materials. Among them, tungsten carbide has higher melting point and hardness, and its compatibility with iron is better, so it is an ideal wear-resistant coating component. [0003] At present, the methods for preparing carbide coatings include chemical vapor deposition, physical vapor deposition, thermal spraying, thermal diathermy, etc., but these methods have the disadvantages of demanding producti...

Claims

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Application Information

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IPC IPC(8): C23C26/00B22D19/08
CPCB22D19/08C23C26/00
Inventor 许云华赵娜娜钟黎声梁淑华卢正欣燕映霖叶芳霞王亮亮邹军涛肖鹏
Owner XIAN UNIV OF TECH
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