High-temperature-resistant PVD coating for mold and preparation method thereof

A technology of high temperature resistance and mold, applied in the field of high temperature resistant PVD coating of mold and its preparation, which can solve the problems of mold scrap treatment and inability to re-use, and achieve the effect of reducing yield loss and production cost.

Active Publication Date: 2019-11-05
CIXI YIMEIJIA ALUMINUM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the wear of the mold exceeds the customer's requirements, the mold can only be scrapped and cannot be reused

Method used

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  • High-temperature-resistant PVD coating for mold and preparation method thereof

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preparation example Construction

[0022] The present invention also provides a method for preparing a mold high temperature resistant PVD coating, comprising the steps of:

[0023] (1) Purify the surface of the mold, finely grind and polish the corroded or scratched mold to make the mold surface reach a mirror state, and then use acetone and alcohol to ultrasonically clean and dry the mold;

[0024] (2) Use the arc power bombardment method to make a layer of AlCrN on the mold surface; the bias voltage of the arc power bombardment method is controlled at 220~360V, and the time is controlled at 5~8 minutes; preferably, the arc power bombardment method bias is controlled at 280V, the time is controlled at 6 minutes;

[0025] (3) Using vapor deposition method to use SiO2 and TiN to carry out intermediate multi-layer transition on the bottom layer; the equipment vacuum degree of the vapor deposition method is required to be above 3×10-5Torr, the bias value is set at 70V-120V, and the target material The current is...

Embodiment 1

[0029] A method for preparing a mold high temperature resistant PVD coating:

[0030] (1) Purify the surface of the mold, finely grind and polish the corroded or scratched mold to make the mold surface reach a mirror state, and then use acetone and alcohol to ultrasonically clean and dry the mold;

[0031] (2) use the arc power bombardment method to make a layer of AlCrN on the mold surface; the arc power bombardment method bias is controlled at 220V, and the time is controlled at 5 minutes;

[0032] (3) Use vapor deposition method to use SiO2 and TiN to carry out intermediate multi-layer transition on the bottom layer; the vacuum degree of the equipment of the vapor deposition method is required to be 3 × 10-5Torr, the bias value is set at 70V, and the target current is set In 4A; the number of layers in the middle layer is controlled at 10 layers; the single-layer deposition time of the vapor deposition method is controlled at 15 minutes;

[0033] (4) Put a protective layer...

Embodiment 2

[0035] A method for preparing a mold high temperature resistant PVD coating:

[0036] (1) Purify the surface of the mold, finely grind and polish the corroded or scratched mold to make the mold surface reach a mirror state, and then use acetone and alcohol to ultrasonically clean and dry the mold;

[0037] (2) use the arc power bombardment method to make a layer of AlCrN on the mold surface; the arc power bombardment method bias is controlled at 280V, and the time is controlled at 6 minutes;

[0038] (3) Use vapor deposition method to use SiO2 and TiN to carry out intermediate multi-layer transition on the bottom layer; the equipment vacuum degree of the vapor deposition method is required to be 4×10-5Torr, the bias value is set at 90V, and the target current is set In 6A; the number of layers in the middle layer is controlled at 11 layers; the single-layer deposition time of the vapor deposition method is controlled at 20 minutes;

[0039] (4) Put a protective layer CrN on t...

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Abstract

The invention provides a high-temperature-resistant PVD coating for a mold and a preparation method thereof. The PVD coating is composed of a bottom layer, intermediate multiple layers and a protecting layer; the bottom layer contains AlCrN; the intermediate multiple layers contain SiO2 and TiN; and the protecting layer contains CrN. The preparation method comprises the following steps that (1), purifying treatment is conducted on the mold surface; (2), the mold surface is coated with the bottom layer AlCrN through an arc power source bombardment method; (3), intermediate multilayer transitionis conducted on the bottom layer with SiO2 and TiN through a vapor deposition method; and (4), the protecting layer CrN is arranged on the intermediate multiple layers through a high-frequency high-energy power source, and the high-temperature-resistant PVD coating is obtained. After the aluminum alloy mold is treated through the technology, the performance requirements such as the corrosion resistance and the high temperature resistance of a film layer still can be met on the condition that water plating treatment is omitted, and the film layer thickness is greatly decreased.

Description

technical field [0001] The invention relates to the technical field of hot extrusion die surface treatment, in particular to a die high temperature resistant PVD coating and a preparation method thereof. Background technique [0002] With the continuous development of China's auto industry and the continuous introduction of new energy vehicles, the output and sales of China's auto market have reached a new height. Some auto brands have begun to look for high-quality suppliers in China to provide global purchase. This is both an opportunity and a challenge for China's auto parts industry. We must seize this opportunity and make breakthroughs in all aspects to meet the growing requirements of customers. For aluminum thermal processing enterprises, hot extrusion dies are the basis of products. All products are formed through hot extrusion dies, and the maintenance of the dies is particularly critical. When the wear of the mold exceeds the customer's requirements, the mold can...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C14/32C23C14/06C23C14/10C23C14/02
CPCC23C14/028C23C14/0641C23C14/10C23C14/325
Inventor 罗布湾
Owner CIXI YIMEIJIA ALUMINUM CO LTD
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