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Heat treatment process of aluminum alloy extrusion die

An extrusion die and aluminum alloy technology, which is applied in heat treatment furnaces, heat treatment equipment, manufacturing tools, etc., to achieve the effects of prolonging service life, improving hardness and toughness, and improving stability

Inactive Publication Date: 2019-03-01
河南精诚汽车零部件有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There is little research on the application of low-pressure (semi-vacuum) oxidation to aluminum alloy extrusion dies

Method used

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Effect test

Embodiment

[0024] The invention provides a heat treatment process for an aluminum alloy extrusion die, which includes the steps of machining, boronizing, quenching, tempering, cleaning and nitrocarburizing:

[0025] (1) Processing: Carry out rough turning processing on the aluminum alloy extrusion die material, complete the processing of process holes, pin holes, taps, and bolt holes, and obtain the mold blank; then perform quenching and tempering heat treatment on the mold blank; Die assembly, complete the fit of the stopper and the positioning pin, and finally tighten with the fastening bolts; process the positioning reference hole of the mated mold, the surface roughness of the hole should be higher than Ra0.8; the upper mold core adopts inlay welding The mold core rod is processed by cylindrical grinding, and the mold core head is formed by wire cutting. After the mold core is processed, it is inserted into the inlay hole of the upper mold and fixed at the rear end by argon arc weldin...

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Abstract

The invention relates to a heat treatment process of an aluminum alloy extrusion die. The heat treatment process comprises the steps of machining, boriding, quenching, tempering, cleaning and tufftriding, specifically, firstly, an aluminum alloy extrusion die material is machined firstly; then the surface of the aluminum alloy extrusion die is decontaminated, after decontamination treatment, the aluminum alloy extrusion die is placed into a stainless steel container with a cover, the space between the inner side of the stainless steel container and the outer side of the aluminum alloy extrusion die is filled with boriding powder, the space between a cover body of the stainless steel container and a stainless steel container body is sealed through refractory mortar, finally the stainless steel container is placed into a furnace to be heated to 900 DEG C for heat preservation for 2-4 h, then furnace cooling is conducted to the room temperature, and the die is taken out; then the die issubjected to heat treatment, namely vacuum quenching and three-time tempering, and then oil contamination cleaning is conducted; and finally, the cleaned aluminum alloy extrusion die is placed into anitriding furnace to be tufftrided. According to the heat treatment process, the performance such as hot melt loss resistance and adhesion resistance of the aluminum alloy extrusion die is improved.

Description

technical field [0001] The invention belongs to the technical field of metal surface chemical treatment, and in particular relates to a heat treatment process of an aluminum alloy extrusion die. Background technique [0002] With the rapid development of society, the production scale of modern industry is constantly expanding, the demand for molds is increasing, and the quality requirements are getting higher and higher. [0003] Aluminum alloy extrusion dies are repeatedly in contact with high-temperature alloys during service. Under the action of periodic alternating thermal stress, the microstructure and properties of the die material, especially the surface layer, gradually evolve, eventually leading to failure. Thermal melting loss is a very important reason for aluminum alloy extrusion dies. In order to improve the performance of the mold and increase the life of the mold, surface treatment technology is introduced. [0004] Surface treatment technology is mainly to ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21D1/18C21D9/00C23C8/26C23C8/70
CPCC21D1/18C21D9/0068C23C8/26C23C8/70
Inventor 郜志文
Owner 河南精诚汽车零部件有限公司
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