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High-temperature wear-resisting coating, female die and preparation method of female die

A high-temperature wear-resistant and coating technology, used in coatings, metal material coating processes, ion implantation plating, etc., can solve the problems of poor high temperature resistance and short life of coatings

Active Publication Date: 2017-07-21
吉林省力科科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to provide a high-temperature wear-resistant coating, a concave mold and a preparation method thereof in order to solve the problems of poor high temperature resistance and short service life of the existing coating applied to the inner wall of the concave mold

Method used

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  • High-temperature wear-resisting coating, female die and preparation method of female die
  • High-temperature wear-resisting coating, female die and preparation method of female die

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preparation example Construction

[0033] The present invention also provides a method for preparing a die, comprising:

[0034] Step 1: pretreating the surface of the matrix on the inner wall of the die;

[0035] Step 2: Etching and activating the surface of the inner wall substrate of the concave mold after pretreatment obtained in Step 1;

[0036] Step 3: Depositing a Cr bonding layer on the surface of the matrix inner wall of the concave mold after the etching activation treatment obtained in Step 2;

[0037] Step 4: Depositing a CrN transition layer on the surface of the Cr bonding layer obtained in Step 3;

[0038] Step 5: Depositing an AlCrN transition layer on the surface of the CrN transition layer obtained in step 4;

[0039] Step 6: Depositing an AlTiCr(Y)N coating on the surface of the AlCrN transition layer obtained in Step 5 to obtain a concave mold with a high-temperature-resistant and wear-resistant coating deposited on the inner wall.

[0040]According to the present invention, the surface o...

Embodiment 1

[0050] (1) Polish the inner wall of the concave mold made of 3Cr2W8V material to a roughness of less than 0.4 μm, put it into the pre-treatment cleaning line for cleaning, remove the oil stains, polishing wax and adsorbed particles on the surface of the concave mold, preheat after rapid drying After degassing, put it into the coating vacuum chamber, and pump the vacuum to less than 5.0×10 -3 Pa.

[0051] (2) Turn on the heating in the vacuum chamber, the workpiece reaches 440°C, and the backside is vacuumed to less than 5.0×10 -3 After Pa, continue to keep warm for 80 minutes, then pass argon gas into the coating chamber, control the pressure at 1.0Pa, apply a -200V pulse bias voltage on the workpiece; turn on the ion source, adjust the current to 3.5A, and use argon plasma to treat the matrix surface of the die. Bombard cleaning for 65 minutes to clean and activate the coating surface. Then adjust the pressure at 0.45Pa, turn on the Cr arc target, target current 72A, apply ...

Embodiment 2

[0057] (1) Polish the inner wall of the concave mold made of 4Cr3Mo2WMnVNb material to a roughness of less than 0.4μm, put it into the pre-treatment cleaning line for cleaning, remove the oil, polishing wax and adsorbed particles on the surface of the concave mold, preheat after rapid drying After degassing, put it into the coating vacuum chamber, and pump the vacuum to less than 5.0×10 -3 Pa.

[0058] (2) Turn on the heating in the vacuum chamber, the workpiece reaches 450°C, and the backside is vacuumed to less than 5.0×10 -3 After Pa, continue to keep warm for 90min. Then pass argon gas into the coating chamber, control the pressure at 1.1Pa, and apply a -200V pulse bias voltage on the workpiece; turn on the ion source, adjust the current to 4A, and use argon plasma to bombard and clean the matrix surface of the die for 75 minutes to clean and activate the coating surface. Then the pressure was adjusted to 0.5Pa, the Cr arc target was turned on, the target current was 75...

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Abstract

The invention provides a high-temperature wear-resisting coating, a female die and a preparation method of the female die, and belongs to the technical field of coatings. The problems that an existing coating applied to the inner wall of a female die is poor in high temperature resistance and short in service life are solved. The coating comprises a Cr bonding layer, a CrN transition layer arranged on the Cr bonding layer, an AlCrN transition layer arranged on the CrN transition layer, and an AlTiCr(Y)N coating arranged on the AlCrN transition layer. The invention further provides the female die. The high-temperature wear-resisting coating is deposited on the surface of a matrix on the inner wall of the female die. The invention further provides the preparation method of the female die. The coating provided by the invention is applied to the inner wall of the female die of a high-strength steel part hot extrusion die, the temperature resistance can be close to 1000 DEG C, and the service life is prolonged by four times or above.

Description

technical field [0001] The invention belongs to the technical field of coatings, and in particular relates to a high-temperature wear-resistant coating, a die and a preparation method thereof. Background technique [0002] Hot extrusion of high-strength steel for automobiles requires heating the steel to about 1200°C, and extruding it into a specific shape with the use of a punch and a die. During the extrusion process, the punch presses the steel to deform it and passes through the die, and at the same time sprays water for forced cooling, and the working frequency exceeds 1 piece / second. During production, it was found that although the punch was subjected to a large force, it was cooled well, and the service life after nitriding treatment could reach more than 8,000 pieces, and the failure mode was mainly thermal fatigue; while the die was inside the entire system, the cooling conditions were not good, High-strength steel parts can still reach above 800 °C here, and the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C14/32C23C14/14C23C14/06
CPCC23C14/0021C23C14/0641C23C14/14C23C14/325
Inventor 李明南夏原李光高方圆
Owner 吉林省力科科技有限公司
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