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Remanufacturing method of high strength die steel

A die steel, high-strength technology, applied in the field of die steel, can solve the problems that die steel cannot adapt to high strength and excellent machining performance, and achieve the effects of excellent machining performance, easy realization and extended service life

Active Publication Date: 2018-08-17
JIANGSU XIANGHE ELECTRONICS SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a high-strength mold for the disadvantages that the mold steel manufactured in the prior art cannot meet the high strength and excellent machining performance at the same time, and can adapt to the trend of corrosion resistance and longer life. Steel Remanufacturing Methods

Method used

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  • Remanufacturing method of high strength die steel

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Effect test

Embodiment 1

[0037] First, a plurality of micro-nano grooves with different depths are formed on the surface of the high-strength mold steel 11 to be processed, and then metal nanoparticles with an average particle size of 7nm are consolidated in the multiple micro-nano grooves by PVD technology to form a transition The bottom layer 1, the material of the metal nanoparticles is mold steel with a Cr content that is 0.5% more than the high-strength die steel 11 to be processed, and then the iron-based alloy powder is fused on the transition bottom layer 1 by laser cladding technology to form a cladding middle layer 2. Finally, a silicon nitride layer is provided on the cladding intermediate layer 2 as the outermost protection layer 3 .

Embodiment 2

[0039] First, a plurality of micro-nano grooves with different depths are formed on the surface of the high-strength mold steel 11 to be processed, and then metal nanoparticles with an average particle size of 10nm are consolidated in the multiple micro-nano grooves by PVD technology to form a transition The bottom layer 1, the material of the metal nanoparticles is mold steel with a Cr content that is 0.9% more than the high-strength die steel 11 to be processed, and then the iron-based alloy powder containing ceria is fused on the transition bottom layer 1 by laser cladding technology A cladding intermediate layer 2 is formed, and finally a silicon carbide layer is provided on the cladding intermediate layer 2 as the outermost protective layer 3 .

Embodiment 3

[0041]First, a plurality of micro-nano grooves with different depths are formed on the surface of the high-strength mold steel 11 to be processed, and then metal nanoparticles with an average particle size of 15nm are consolidated in the multiple micro-nano grooves by PVD technology to form a transition The bottom layer 1, the material of the metal nanoparticles is mold steel with a Cr content that is 0.3% more than the high-strength die steel 11 to be processed, and then the iron-based alloy powder containing diyttrium trioxide is fused to the transition bottom layer 1 by laser cladding technology A cladding intermediate layer 2 is formed on the cladding intermediate layer 2, and finally a silicon nitride layer is provided on the cladding intermediate layer 2 as the outermost protective layer 3.

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Abstract

The invention relates to the technical field of die steel, in particular to high-strength die steel and a high-strength die steel remanufacturing method. The remanufacturing method comprises the following steps that a plurality of micro-nano grooves are formed in the surface of the high-strength die steel; metal nanoparticles are solidified into the multiple micro-nano grooves, and a transition bottom layer is formed on the surface of the high-strength die steel; iron-base alloy powder is fused on the transition bottom layer to form a fusion covering middle layer; and an outermost protection layer is arranged on the fusion covering middle layer, and at least one of silicon nitride and silicon carbide is contained in the outermost protection layer. According to the remanufacturing method, the high-strength die steel remanufacturing quality can be guaranteed, the high-strength die steel can be used in serious working environment, and the application scope of the high-strength die steel is enlarged; in addition, the remanufacturing cost of the high-strength die steel can be reduced, energy consumption is reduced, and the production efficiency is improved; and the corrosion resistancecan be improved, the material residual stress and brittleness are reduced, and the service life of the die steel under various working conditions is prolonged.

Description

Technical field: [0001] The invention relates to the technical field of die steel, in particular to high-strength die steel, and in particular to a remanufacturing method of high-strength die steel. Background technique: [0002] A mold is a tool that makes a blank into a workpiece with a specific shape and size under the action of an external force. It is used in injection molding, blow molding, extrusion, die-casting or forging, smelting and stamping in industrial production. The working conditions are very different, so the material selection range for manufacturing molds is very wide. At present, the most widely used mold materials are mold steels. Die steel can be roughly divided into three categories: cold-rolled die steel, hot-rolled die steel and plastic die steel. They should have high hardness, strength and wear resistance, as well as sufficient toughness, and high hardenability and hardenability Wait. Among them, high-strength die steel has sufficiently high har...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C24/10C23C28/00
CPCC23C24/103C23C28/34
Inventor 周志明王刚孙玉虎
Owner JIANGSU XIANGHE ELECTRONICS SCI & TECH
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