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PCVO plasma impregnation composite reinforced method for precise vane hot forging die

A plasma and hot forging die technology, applied in gaseous chemical plating, coating, metal material coating process, etc., can solve the problem that the treatment effect is difficult to adapt to harsh working conditions, no separation treatment has been found, and no infiltration in the same furnace has been found. Plating compound treatment and other issues

Inactive Publication Date: 2004-07-07
XI AN JIAOTONG UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, so far, plasma nitriding and combined plasma nitriding and physical vapor deposition films have been reported mainly for separate treatment (two furnace treatment), which is not only costly, but also difficult to adapt to harsh working conditions such as hot forging dies.
The separate treatment of plasma nitriding and physical vapor deposition coating for precision blade hot forging dies has not been found, and there is no report on the combined treatment of PCVD plasma and furnace permeation coating for precision blade hot forging dies made of H13 material

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] For the precision blade hot forging die made of H13 material with specifications of 180×120×100 (length×width×height), the technical scheme of the present invention is adopted, and the process parameters are combined with plasma nitriding and PCVD TiN in the same furnace. In the inspection of forged titanium alloy blades, the die life was increased from 100 pieces in the original heat treatment and 500 pieces in single plasma nitriding to 1000 pieces, and the surface quality of the blades was significantly improved, and the production efficiency was greatly improved.

Embodiment 2

[0028] For the precision blade hot forging die made of H13 material with specifications of 240×180×120 (length×width×height), the technical scheme of the present invention is adopted, and the process parameters are combined with plasma nitriding and PCVD TiCN in the same furnace. In the inspection of forging high-temperature nickel-based alloy blades, the die life was increased from 100 pieces in the original heat treatment and 500 pieces in single plasma nitriding to 960 pieces, and the surface quality of the blades was significantly improved, and the production efficiency was greatly improved.

Embodiment 3

[0030] For the precision blade hot forging die made of H13 material with specifications of 240×180×120 (length×width×height), the technical scheme of the present invention is adopted, and the process parameters are combined with plasma nitriding and PCVD TiCN in the same furnace. In the inspection of forging stainless steel blades, the die life has been increased from 80 pieces in the original heat treatment and 300 pieces in single plasma nitriding to 500 pieces, and the surface quality of the blades has been significantly improved, and the production efficiency has been greatly improved.

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Abstract

The PCVD plasma impregnation process of hot forging die includes surface deoiling, polishing, supersonic cleaning in acetone and alcohol dewatering of the die after quenching at 1070 deg.c and tempering at 530 deg.c; plasma nitriding in a industrial PCVD vacuum furnace; and PCVD plating. The die thus treated has surface structure comprising base, diffusion layer of solid solution of nitrogen in alpha-Fe with the nitriding layer thickness being 150-180 micron, TiN film layer of 2.0 micron thickness or TiCN film layer of 1.5 micron thickness. Thus treated surface has hardness at high as Hv1800-2200 and high film attaching strength suitable for harsh friction wear condition.

Description

technical field [0001] The invention belongs to the field of plasma surface modification, and further relates to a PCVD plasma infiltration composite strengthening method for a precision blade hot forging die. Background technique [0002] The precision blade hot forging die is the key process equipment for aircraft engine blade forming, and is used for hot forging of blade materials such as titanium alloy, stainless steel and high-temperature nickel-based alloy. At the same time, the blade hot forging die is also a type of die product with extremely harsh service conditions. It is outstanding in three aspects: the working environment is high temperature and rapid heating, rapid cooling, the load is heavy and high-speed impact, and the forging process is that the blank is in the mold. The severe deformation of the surface and the friction and wear with the surface of the mold will lead to the failure of the hot forging model cavity surface friction, w...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C8/24C23C8/36C23C16/34C23C16/36C23C16/50
Inventor 马胜利徐可为
Owner XI AN JIAOTONG UNIV
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