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Surface plating composite coating process for die

A composite coating and process technology, applied in the field of surface infiltration composite coating technology for molds, can solve the problems of high production cost and harsh process conditions, and achieve the effects of reducing friction coefficient, low process temperature and high hardness

Active Publication Date: 2016-10-12
PVT COATING CHANGZHOU
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  • Application Information

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Problems solved by technology

The above-mentioned technical scheme has the problems of harsh process conditions and high production costs

Method used

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  • Surface plating composite coating process for die
  • Surface plating composite coating process for die
  • Surface plating composite coating process for die

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Embodiment 1

[0028] A kind of surface permeation plating composite coating technology for mold, its technological process is as attached figure 1 Shown, wherein, described ion nitriding comprises the following steps:

[0029] (1) Loading mold workpieces: When loading, pay attention to the sufficient distance between different workpieces, and use screws or splints to block the screw holes or gaps on the workpieces whose size is less than 6mm;

[0030] (2) Vacuuming: Select the nitriding program on the control panel, start the Vessel button, start vacuuming, and start heating when the vacuum reaches the critical value;

[0031] (3) Heating stage: vacuumize to below 10Pa to start heating, and conduct heating by pulse voltage ion discharge. Three thermocouples are evenly installed in the furnace to measure and adjust the temperature to keep the temperature in the furnace uniform, and heat to 430°C; specifically, The heating process includes three stages. The first stage is: heating from room ...

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Abstract

The invention relates to a surface plating composite coating process for a die. The process comprises the steps that the die which is treated through the plasma nitriding process is polished and cleaned, and then is clamped; the die is placed into multi-arc ion coating equipment for coating process treating; and plasma nitriding and CrN+Al coating are combined, and meanwhile the effects of two treatment processes are optimized. The surface plating composite coating process has the characteristics of being low in process temperature, high in processing efficiency, small in die deformation and low in energy consumption. An obtained die composite coating has the characteristics of being high in usability, high in hardness, toughness and abrasive resistance, and excellent in high-temperature oxidation resistance. The surface friction coefficient of the die can be effectively lowered, the service life of the die is prolonged, production cost is reduced and product competitiveness is improved. The process is suitable for cold-work die steel with high abrasive resistance requirements and capable of bearing large impact loads, particularly suitable for treatment of the dies like a punching die, stamping die, cold heading die and cold extruding die in the field of automobiles and also suitable for further application and popularization.

Description

technical field [0001] The invention relates to the technical field of metal surface modification processing, in particular to a process of permeating and plating a composite coating on the surface of a mold. Background technique [0002] Due to its excellent hardness, toughness and wear resistance, cold work die steel is often used in cold extrusion, thick plate cold punching and cold heading forming, and is widely used in the automobile manufacturing industry. Cold work die steel has a relatively large deformation resistance to the processed material during work, and the working part of the die bears relatively large pressure, bending force, impact force and friction force. Therefore, the normal reason for the scrapping of cold work die steel is generally wear and tear. Failure due to breakage, collapse force and out-of-tolerance deformation. [0003] The development of the manufacturing industry puts forward more stringent requirements on the service life of the mold. In...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C8/38C23C8/26C23C14/32C23C14/06C23C14/16C23C14/02C23C28/00
CPCC23C8/26C23C8/38C23C14/0021C23C14/022C23C14/0641C23C14/16C23C14/325C23C28/322C23C28/34
Inventor 王信德潘修河
Owner PVT COATING CHANGZHOU
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