Unlock instant, AI-driven research and patent intelligence for your innovation.

Novel ceramic coating for reinforcing surface of aluminum alloy die-casting mold and preparation method thereof

A die-casting mold and surface strengthening technology, which is applied in metal material coating process, coating, molten spraying, etc., can solve the problems of mold prone to micro-cracks and unsatisfactory corrosion resistance, and achieve good corrosion resistance and corrosion resistance. Effects of thermal fatigue performance, high corrosion resistance and thermal fatigue resistance, and service life improvement

Active Publication Date: 2016-11-23
SHAOXING HAOCHENG NEW MATERIAL TECH
View PDF7 Cites 8 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the technical problem that the corrosion resistance of the existing aluminum alloy die-casting mold is not ideal and the surface of the mold is prone to micro-cracks in the die-casting process, and to provide a working surface of the aluminum alloy die-casting mold. Technical process for preparing denser ceramic coatings

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Novel ceramic coating for reinforcing surface of aluminum alloy die-casting mold and preparation method thereof
  • Novel ceramic coating for reinforcing surface of aluminum alloy die-casting mold and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] This embodiment is used for the strengthening coating of aluminum alloy die-casting mold surface, and mold material is H13 mold steel, is attached to the comparatively dense zirconia ceramic coating that takes nickel-chromium alloy as bonding layer on the working surface of mold, and bonding layer The thickness is 0.1mm, and the ceramic coating thickness is 0.2mm.

[0024] The above preparation method for aluminum alloy die-casting mold surface strengthening coating, the steps are:

[0025] Step (1) Degrease and clean the surface of the die-casting mold with acetone, and spray 16# corundum with a pressure of 0.4MPa to roughen the surface to a surface roughness of Ra3;

[0026] Step (2) Use the plasma spraying process to spray nickel-chromium alloy on the surface of the die-casting mold obtained in step (1). The nickel-chromium alloy composition is 20% Cr by mass percentage, the balance is Ni, and the particle size is 200-325 mesh. The spraying parameters are: spraying ...

Embodiment 2

[0030] This embodiment is used for the strengthening coating of aluminum alloy die-casting mold surface, and mold material is H13 mold steel, is attached to the comparatively dense zirconia ceramic coating that takes nickel-chromium alloy as bonding layer on the working surface of mold, and bonding layer The thickness is 0.1mm, and the ceramic coating thickness is 0.2mm.

[0031] The above preparation method for aluminum alloy die-casting mold surface strengthening coating, the steps are:

[0032] Step (1) Degrease and clean the surface of the die-casting mold with acetone, and spray 16# corundum with a pressure of 0.4MPa to roughen the surface to a surface roughness of Ra3;

[0033] Step (2) Use the plasma spraying process to spray nickel-chromium alloy on the surface of the die-casting mold obtained in step (1). The nickel-chromium alloy composition is 20% Cr by mass percentage, the balance is Ni, and the particle size is 200-325 mesh. The spraying parameters are: spraying ...

Embodiment 3

[0037] This embodiment is used for the strengthening coating of aluminum alloy die-casting mold surface, and mold material is H13 mold steel, is attached to the comparatively dense zirconia ceramic coating that takes nickel-chromium alloy as bonding layer on the working surface of mold, and bonding layer The thickness is 0.1mm, and the ceramic coating thickness is 0.2mm.

[0038] The above preparation method for aluminum alloy die-casting mold surface strengthening coating, the steps are:

[0039] Step (1) Degrease and clean the surface of the die-casting mold with acetone, and spray 16# corundum with a pressure of 0.4MPa to roughen the surface to a surface roughness of Ra3;

[0040]Step (2) Use the plasma spraying process to spray nickel-chromium alloy on the surface of the die-casting mold obtained in step (1). The nickel-chromium alloy composition is 20% Cr by mass percentage, the balance is Ni, and the particle size is 200-325 mesh. The spraying parameters are: spraying T...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
thicknessaaaaaaaaaa
thicknessaaaaaaaaaa
particle sizeaaaaaaaaaa
Login to View More

Abstract

The invention discloses a novel ceramic coating for reinforcing the surface of an aluminum alloy die-casting mold and a preparation method thereof. Specific to the failure modes such as corrosion and microcracks occurring in the working process of the aluminum alloy die-casting mold, a plasma spraying technology is used for spraying a nickel-chromium alloy middle layer and the zirconia ceramic coating on the surface of the preprocessed mold. Because the ceramic coating has high porosity and chemical reprocessing is used for compacting the ceramic coating, corrosive media are prevented from directly corroding a metal substrate from holes of the coating. The compact ceramic coating for reinforcing the surface of the aluminum alloy die-casting mold is resistant to molten aluminum alloy corrosion, good in thermal shock resistance, simple in preparation technology, low in cost, and capable of being used for repairing the surface of the aluminum alloy die-casting mold and prolonging the service life of the mold.

Description

technical field [0001] The invention relates to a novel ceramic coating and a preparation method thereof, in particular to a ceramic coating for strengthening the surface of an aluminum alloy die-casting mold and a preparation method thereof. Background technique [0002] Aluminum alloy die-casting is a casting method that uses high pressure to press molten aluminum alloy into a precision metal mold cavity at high speed, and the aluminum alloy liquid solidifies under the action of pressure to form a casting. Die-casting mold is the key equipment of die-casting production, its performance and service life directly affect the quality and cost of aluminum alloy castings. However, the working conditions of aluminum alloy die-casting molds are very harsh, and there are cracks caused by corrosion caused by direct contact with molten aluminum alloy and thermal fatigue caused by repeated heating of hot metal and cooling of cooling medium during the working process of the mold. Thes...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C23C4/12C23C4/10C23C4/08
Inventor 不公告发明人
Owner SHAOXING HAOCHENG NEW MATERIAL TECH