Laser remelting method for ultrasonic spraying of WC-12Co coating

A technology of supersonic spraying and laser remelting, which is applied in the direction of coating, metal material coating process, fusion spraying, etc., can solve the problems such as the decrease of the bonding strength between the coating and the substrate, and achieve improved wear resistance and uniform thickness , The effect of reducing manufacturing costs

Active Publication Date: 2017-02-01
CHANGZHOU UNIV
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Problems solved by technology

However, because the supersonic sprayed WC-12Co coating is mainly bonded to the substrate by mechanical bonding, 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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  • Laser remelting method for ultrasonic spraying of WC-12Co coating
  • Laser remelting method for ultrasonic spraying of WC-12Co coating
  • Laser remelting method for ultrasonic spraying of WC-12Co coating

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Embodiment Construction

[0011] (1) Use 180#-1000# sandpaper to polish the surface of the substrate, clean it with absolute ethanol, and degrease with acetone to remove grease and sundries on the surface of the sample to ensure that the surface cleanliness of the substrate reaches Sa3 level.

[0012] (2) Use cast iron sand with a particle size of 1mm as abrasive grains, compressed air pressure > 0.8MPa, sandblasting distance of 200mm, and sandblasting angle of 20°, so that the roughness can reach RZ60μm.

[0013] (3) Dry the WC-12Co powder with a DHG-9145A type electric heating constant temperature blast drying oven for 3 hours to ensure that the sprayed powder is dry, and then spray on the XM-8000 supersonic flame spraying system, using aviation kerosene as fuel, high pressure O 2 As a combustion-supporting gas, N 2 As the powder feeding gas, the spray oil pressure is 1.25MPa, the oxygen pressure is 1.58MPa, the water temperature is 40°C, and the spray gun pressure is 0.95MPa, so that the surface of ...

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Abstract

The invention relates to the technical field of die steel surface modification treatment, in particular to a laser remelting method for ultrasonic spraying of a WC-12Co coating on the surface of H13 hot work die steel. The surface of the H13 hot work die steel is polished, cleaned and subjected to sand blasting. The laser remelting method is characterized in that the WC-12Co coating is sprayed to the surface of the H13 hot work die steel subjected to sand blasting through an ultrasonic spraying method, after heat preservation and cooling to the room temperature, laser remelting is used for remelting the WC-12Co coating and the surface of the H13 hot work die steel to achieve metallurgical bonding; and the structure property of the cooled coating is enhanced, and abrasion resistance of the coating is improved. The bonding strength of the coating and the base material is improved, and the service life of a mold is prolonged.

Description

technical field [0001] The patent of the invention relates to the technical field of die steel surface modification treatment, specifically refers to the laser remelting method of supersonic spraying WC-12Co coating on the surface of H13 hot work die steel, which improves the bonding strength between the coating and the base material and improves the use of the die Life span belongs to material surface modification treatment technology. Background technique [0002] H13 hot work die steel is widely used in the manufacture of forging dies, hot extrusion dies, precision forging dies and die-casting dies with large impact loads. It has good toughness, thermal strength, thermal stability, oxidation resistance and heat resistance. Fatigue performance and other advantages. However, due to direct contact with high-temperature metals when the hot work die is working, it is subjected to high temperature and friction, the surface wear and high temperature resistance of the die are re...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C4/06C23C4/129C23C24/10
Inventor 孔德军盛天原王文昌汤志鹏汤成建赵本国
Owner CHANGZHOU UNIV
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