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Co base-WC/ TiN/ TiCN composite coating, and repairing method for cold stamping mould

A composite coating, stamping die technology, applied in the coating, superimposed layer plating, metal material coating process and other directions, to achieve the effect of no obvious pores, low friction coefficient, and improved service life

Inactive Publication Date: 2020-05-08
广州珈鹏科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the performance of the coating has a great relationship with the powder composition, preparation method and process parameters. How to screen the powder composition from a large number of influencing factors, select the appropriate preparation method and set the process parameters requires creative work.

Method used

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  • Co base-WC/ TiN/ TiCN composite coating, and repairing method for cold stamping mould
  • Co base-WC/ TiN/ TiCN composite coating, and repairing method for cold stamping mould
  • Co base-WC/ TiN/ TiCN composite coating, and repairing method for cold stamping mould

Examples

Experimental program
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Effect test

Embodiment 1

[0034] A method for repairing a cold stamping die, comprising the following steps:

[0035] (1) Mix the Co-based alloy powder and the WC-Co powder according to the weight percentage of 4:1, place it in a planetary ball mill for 2 hours under an argon protective atmosphere, and dry and sieve the ball-milled powder to obtain the particle size diameter. It is a composite powder of 30-60 μm, and the above powder is sealed and stored. The composition of the Co-based alloy powder is C: 0.5, Ni: 2.4, Cr: 27, Fe: 1.7, Mn: 0.4, Mo: 1.2, Y: 0.04, and the remainder of Co by weight percentage; the WC-Co powder It is WC-12wt.%Co powder.

[0036] (2) Grinding the worn parts of the stamping die to be repaired, ultrasonically cleaning in absolute ethanol, acetone and deionized water in turn, and drying; sandblasting the die to obtain a surface roughness Ra of 5 μm. The material of the cold punching die is Cr12Mo1V1 steel. The process conditions of sandblasting treatment are: sandblasting a...

Embodiment 2

[0051] A method for repairing a cold stamping die, comprising the following steps:

[0052] (1) Mix Co-based alloy powder and WC-Co powder at a weight percentage of 9:1, place it in a planetary ball mill for 1.5 hours in an argon protective atmosphere, and dry and sieve the ball-milled powder to obtain a particle size The composite powder with a diameter of 30-60 μm is sealed and stored. The composition of the Co-based alloy powder is C: 1.2, Ni: 2.7, Cr: 33, Fe: 3.1, Mn: 0.5, Mo: 0.7, Y: 0.07, and Co balance by weight percentage. The WC-Co powder is WC-17wt.%Co powder.

[0053] (2) Grinding the worn parts of the stamping die to be repaired, ultrasonically cleaning in absolute ethanol, acetone and deionized water in turn, and drying; sandblasting the die to obtain a surface roughness Ra of 4 μm. The material of the cold punching die is W18Cr4V steel. The technological conditions of sandblasting treatment are: sandblasting abrasive: 40 mesh brown corundum, sandblasting dista...

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Abstract

The invention discloses a Co base-WC / TiN / TiCN composite coating, which comprises a metal substrate, a Co base-WC coating, a TiN gradual change coating and a TiCn gradual change coating, wherein themetal substrate, the Co base-WC coating, the TiN gradual change coating and the TiCn gradual change coating are deposited on the metal substrate in sequence; the Co base-WC coating is prepared in a way that Co base alloy powders and WC powders are subjected to high velocity oxygen fuel; and the TiN gradual change coating and the TiCn gradual change coating are prepared through an ion assisted unbalanced magnetron sputtering technology. The invention also discloses application of the above composite coating to the repairing of a stamping mould, and a specific repairing method. The integral comprehensive performance, including the repairing layer binding force, the hardness, the abrasion resistance and the impact resistance, of the stamping mould can be improved, the service life of the stamping mould is greatly prolonged, and production cost is effectively lowered.

Description

technical field [0001] The invention relates to a composite coating and a preparation method thereof, in particular to a Co-based-WC / TiN / TiCN composite coating and a method for repairing a cold punching die. Background technique [0002] Cold stamping dies are subject to loads such as impact, vibration, friction, high pressure, stretching, bending and torsion, and even work at higher temperatures (such as cold extrusion). The working conditions are complex and prone to wear, fatigue, fracture, deformation, etc. Phenomenon. One of the main reasons for the failure of cold stamping dies is wear failure, resulting in unqualified stamping products, which will seriously lead to scrapped dies, increase production costs and cause economic losses. How to repair the failed stamping die and realize the remanufacturing of the failed die is the research direction of the existing technology. The more common ones are insert bonding, surfacing, thermal spraying, laser cladding, etc. [0...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C4/129C23C4/06C22C19/07C22C32/00C23C14/06C23C14/35C23C28/00B21D37/01B21D37/10
CPCB21D37/01B21D37/10C22C19/07C22C32/0052C23C4/06C23C4/129C23C14/0084C23C14/0641C23C14/0664C23C14/35C23C28/324C23C28/34
Inventor 王爱平
Owner 广州珈鹏科技有限公司
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