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A kind of high toughness wear-resisting composite coating and the method for depositing it on the hot working convex mold

A technology of composite coating and composite layer, which is applied in the direction of coating, metal material coating process, vacuum evaporation plating, etc., can solve the problems of matching and not reaching the production efficiency of the die, so as to improve the service life and eliminate fatigue failure , enhance the effect of wear resistance and thermal fatigue resistance

Active Publication Date: 2020-08-14
INST OF MECHANICS CHINESE ACAD OF SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the hard coating applied on a large scale improves the surface structure of the convex mold to a certain extent, improves the surface performance of the mold, and prolongs the service life of the mold, but it does not match the production efficiency of the concave mold.

Method used

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  • A kind of high toughness wear-resisting composite coating and the method for depositing it on the hot working convex mold
  • A kind of high toughness wear-resisting composite coating and the method for depositing it on the hot working convex mold
  • A kind of high toughness wear-resisting composite coating and the method for depositing it on the hot working convex mold

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] Such as figure 2 As shown, the present invention provides a high-toughness wear-resistant composite coating, including a Cr bonding layer 2, a CrN transition layer 3, a CrAlN gradient support layer 4, a Cr metal layer 5, a CrAlN / AlCrN composite layer 6 and CrAlVN / CrAlSiN functional layer 7 .

[0054] The specific functions and related characteristics of each layer are as follows:

[0055] Cr binding layer 2: the thickness is 80-160nm, which is used to improve the bonding force between the composite coating and the mold matrix;

[0056] CrN transition layer 3: the thickness is 150-300nm, and the Al atomic percentage is 10-35 at.% (atom percentage content), which is used to improve the bonding strength between the bonding layer and the supporting layer;

[0057] CrAlN gradient support layer 4: the thickness is 450-900nm, which is used to improve the structural hardness and reduce the internal stress caused by the lattice mismatch between the composite coating and the b...

Embodiment 2

[0067] Such as Figure 1 to Figure 3 As shown, the present invention also provides a method for depositing a high-toughness wear-resistant composite coating on a hot work punch, including the following three steps:

[0068] Step 100, performing glow discharge cleaning after pretreating the substrate of the hot working convex mold;

[0069] Step 200, depositing a high-toughness wear-resistant composite coating on the substrate;

[0070] Step 300, heating the substrate deposited with the high-toughness wear-resistant composite coating under the background vacuum degree, and then cooling to obtain the substrate.

[0071] Such as figure 2 As shown, it is a schematic diagram of the target distribution of the existing vacuum cathode arc ion plating equipment for depositing the composite coating of the present invention, including a rotatable base 10, an ion source 9 and a vacuum chamber 8 installed on the base 10, Cr alloy Target 11; CrAl alloy target 12; AlCr alloy target 13; C...

Embodiment 3

[0096] The difference from Example 2 is:

[0097] The present invention also provides a method for depositing a high-toughness and wear-resistant composite coating on other materials' hot-working convex molds. The substrate of the hot-working convex molds is made of 4Cr5MoSiV1 material, including the following three steps:

[0098] Step 100, performing glow discharge cleaning after pretreating the substrate of the hot working convex mold;

[0099] Step 200, depositing a high-toughness wear-resistant composite coating on the substrate;

[0100] Step 300, heating the substrate deposited with the high-toughness wear-resistant composite coating under the background vacuum degree, and then cooling to obtain the substrate.

[0101] In the present embodiment, one of the accurate parameters is selected as an example for illustration, which does not affect the essence of the realization result of the present embodiment. The deposition method of the composite coating on the hot work pu...

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Abstract

The invention discloses a high-toughness wear-resistant composite coating. The high-toughness wear-resistant composite coating comprises a Cr bonding layer, a CrN transition layer, a CrAlN gradient supporting layer, a Cr metal layer, a CrAlN / AlCrN composite layer and a CrAlVN / CrAlSiN function layer which are sequentially arranged. The method for depositing the coating on a hot working male mold comprises the steps that glow discharge cleaning is conducted after a matrix of the hot working male mold is pretreated; the high-toughness wear-resistant composite coating is deposited on the matrix; and the matrix with the high-toughness wear-resistant composite coating is heated under the base pressure and then cooled, and the matrix is obtained. The Cr metal layer is added in the composite coating to serve as a soft layer, and the toughness of the whole coating is improved. According to the mold prepared through the method, the wear resistance and the thermal fatigue resistance of the surface of the male mold are effectively enhanced, mold deformation is reduced, fatigue failure of the mold coating is eliminated, the service life is prolonged, and the high-toughness wear-resistant composite coating can be used for developing male molds with complex models.

Description

technical field [0001] The invention relates to the technical field of hot-working mold preparation, in particular to a high-toughness wear-resistant composite coating and a method for depositing it on a hot-working convex mold. Background technique [0002] In today's era of rapid industrial development, China's automobile industry has ushered in a new period of development, and at the same time it has put forward higher requirements for the mechanical properties of automobile molds. Among all kinds of molds, hot work molds have the highest requirements and the worst working environment. Due to long-term contact with high-temperature molten metal, hot-working molds are often subjected to repeated tension and compression stress due to heating and cooling, and wear and corrosion caused by metal (liquid) flow in actual production, often causing embrittlement , thermal fatigue, cracking, erosion corrosion and fatigue fracture and other early failures. [0003] The hot extrusi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C14/06C23C14/16C23C14/32C23C14/02
CPCC23C14/022C23C14/0641C23C14/16C23C14/325
Inventor 夏原高方圆李光李明南
Owner INST OF MECHANICS CHINESE ACAD OF SCI
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