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High-performance metal ceramic composite coating for surface strengthening of hot-working die and preparation method thereof

A metal-ceramic composite and hot-working mold technology, which is applied in the direction of metal material coating process, coating, molten spraying, etc., can solve the problems of thermal fatigue resistance, corrosion resistance, high temperature oxidation resistance, inability to meet surface protection, and environmental pollution. and other problems, to achieve good high temperature oxidation resistance and thermal fatigue resistance, excellent high temperature wear resistance, and reduce production costs

Inactive Publication Date: 2017-08-29
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these methods also have certain limitations: Nitriding and CVD processes need to be carried out at relatively high temperatures, which can easily lead to deformation of the mold; limited by the size of the furnace, larger molds cannot be treated with PVD technology; hard chrome plating produces Cr 6+ serious environmental pollution
However, most of the existing thermal spraying mold protective coatings only improve some unilateral properties of the mold, but have problems of poor thermal fatigue resistance, corrosion resistance or high temperature oxidation resistance, and cannot meet the harsh thermal conditions of some working conditions. Mold Surface Protection

Method used

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  • High-performance metal ceramic composite coating for surface strengthening of hot-working die and preparation method thereof
  • High-performance metal ceramic composite coating for surface strengthening of hot-working die and preparation method thereof
  • High-performance metal ceramic composite coating for surface strengthening of hot-working die and preparation method thereof

Examples

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Effect test

Embodiment 1

[0029] This embodiment provides a kind of high-performance metal-ceramic composite coating that is used for hot working mold surface strengthening, and the metal-ceramic composite coating is made of Cr 3 C 2 -CoNiCrAlY composite powder prepared. The composite powder consists of 75wt% Cr 3 C 2 and 25wt% CoNiCrAlY are prepared by spray granulation after high-energy ball milling, wherein the composition of CoNiCrAlY alloy is 32wt% Ni, 24wt% Cr, 9wt% Al, 0.65wt% Y, and the balance is Co.

[0030] The above-mentioned preparation method for the high-performance metal-ceramic composite coating for hot work mold surface strengthening, it comprises the following steps:

[0031] Step 1. First, ultrasonically clean the surface of the 4Cr5MoSiV1 hot work mold with acetone, and then use 24# white corundum to roughen the surface by sandblasting. The surface roughness after sandblasting is Ra3.6μm.

[0032] Step 2, Cr before spraying 3 C 2 -CoNiCrAlY spray powder is dried at 120°C for ...

Embodiment 2

[0035] This embodiment provides a kind of high-performance metal-ceramic composite coating that is used for hot working mold surface strengthening, and the metal-ceramic composite coating is made of Cr 3 C 2 -CoNiCrAlY composite powder prepared. The composite powder consists of 70wt% Cr 3 C 2 and 30wt% CoNiCrAlY are prepared by spray granulation after high-energy ball milling, wherein the composition of CoNiCrAlY alloy is 32wt% Ni, 24wt% Cr, 9wt% Al, 0.65wt% Y, and the balance is Co.

[0036] The above-mentioned preparation method for the high-performance metal-ceramic composite coating that is used for hot-working mold surface strengthening, it comprises the steps:

[0037] Step 1. First, ultrasonically clean the surface of the 4Cr5MoSiV1 hot work mold with acetone, and then use 24# white corundum to roughen the surface by sandblasting. The surface roughness after sandblasting is Ra3μm.

[0038] Step 2, Cr before spraying 3 C 2 -CoNiCrAlY spray powder is dried at 120°C fo...

Embodiment 3

[0041] This embodiment provides a kind of high-performance metal-ceramic composite coating that is used for hot working mold surface strengthening, and the metal-ceramic composite coating is made of Cr 3 C 2 -CoNiCrAlY composite powder prepared. The composite powder consists of 80wt% Cr 3 C 2 and 20wt% CoNiCrAlY are prepared by spray granulation after high-energy ball milling, wherein the composition of CoNiCrAlY alloy is 32wt% Ni, 24wt% Cr, 9wt% Al, 0.65wt% Y, and the balance is Co.

[0042] The above-mentioned preparation method for the high-performance metal-ceramic composite coating that is used for hot-working mold surface strengthening, it comprises the steps:

[0043] Step 1. First, ultrasonically clean the surface of the 4Cr5MoSiV1 hot work mold with acetone, and then use 24# white corundum to roughen the surface by sandblasting. The surface roughness after sandblasting is Ra4μm.

[0044] Step 2, Cr before spraying 3 C 2 -CoNiCrAlY spray powder is dried at 120°C ...

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Abstract

The invention discloses a high-performance metal ceramic composite coating for surface strengthening of a hot-working die and a preparation method thereof. The metal ceramic compound coating is prepared by spraying composite powder onto the surface of a pretreated die through adopting active combustion high-speed fuel spraying technology by using Cr3C2-CoNiCrAlY composite powder as a coating material, wherein the composite powder contains the following components in percentage by weight: 70-80% of Cr3C2 and 20-30% of CoNiCrAlY. The metal ceramic coating which is well bonded with a matrix and has high-temperature-resistant and wear-resistant, thermal-fatigue-resistant, corrosion-resistant and high-temperature oxidization-resistant performances can be prepared by using the method, so that the service life of the hot-working die can be greatly prolonged.

Description

technical field [0001] The invention relates to the field of high-performance metal-ceramic composite coating and its preparation method, more specifically, relates to a high-performance metal-ceramic composite coating and its preparation method for hot-working mold surface strengthening. Background technique [0002] Mold is the core equipment of the manufacturing industry, and plays an important role in the fields of electronic power, transportation, aerospace and other fields. More than half of the parts must be formed through molds. However, the overall service life of molds in my country is significantly lower than that in developed countries. Especially, hot work molds serve in harsh environments with high temperature, high wear and high stress, which leads to oxidation, wear, corrosion and fatigue cracking on the surface, which greatly shortens the life of molds. service life. In view of the fact that most of the failures of hot work dies are caused by the surface, su...

Claims

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Application Information

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IPC IPC(8): C23C4/06C23C4/129
CPCC23C4/06C23C4/129
Inventor 曾德长周小龙王刚余红雅邱兆国
Owner SOUTH CHINA UNIV OF TECH
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