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Zinc powder sherardizing method of machined steel product with no hydrogen embrittlement and low surface damage

A technology of machining and powder galvanizing, applied in metal material coating process, coating, solid-state diffusion coating, etc. hidden dangers and other problems, to achieve the effect of avoiding the hidden danger of hydrogen embrittlement and low surface damage by hot galvanizing

Inactive Publication Date: 2015-04-29
CHANGZHI QINGHUA MACHINERY FACTORY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] In the state of continuous rolling, friction and impact of parts, although the inert impact medium can play a considerable role in blocking and buffering, it is inevitable that there will be collisions between parts, between parts and containers, between parts and tooling, resulting in The surface morphology of the workpiece has light damage
Therefore, the heating and galvanizing process cannot prevent the surface morphology damage of machined steel parts
[0012] From the above analysis, it can be seen that the traditional powder zinc sherardizing process will cause hydrogen embrittlement hidden dangers in machined steel parts, or damage the workpiece in a large area, resulting in a decline in its shape tolerance and surface morphology quality, so it is not suitable for powder infiltration of machined steel parts. Zinc, that is, powder galvanizing technology is difficult to be widely used in machining steel parts

Method used

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  • Zinc powder sherardizing method of machined steel product with no hydrogen embrittlement and low surface damage
  • Zinc powder sherardizing method of machined steel product with no hydrogen embrittlement and low surface damage
  • Zinc powder sherardizing method of machined steel product with no hydrogen embrittlement and low surface damage

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Effect test

Embodiment 1

[0053] A method for mechanically processing thin-walled iron and steel cylinder parts without hydrogen embrittlement and low surface damage powder galvanizing method, comprising the following steps:

[0054] 1) Anti-rust treatment of machined steel parts

[0055] After finishing or final machining of machined steel parts, the machined surface is coated with anti-rust oil for oil sealing, and no other surface treatment is performed before the pre-treatment process of powder galvanizing;

[0056] 2) Pre-processing

[0057] Use ultrasonic cleaning to remove oil stains on the surface of the workpiece;

[0058] 3) Heating zinc sherardizing

[0059] Before the parts are loaded into the furnace, the parts are hot-dip galvanized after being bundled with barbed wire.

Embodiment 2

[0061] A method for mechanically processing thin-walled iron and steel cylinder parts without hydrogen embrittlement and low surface damage powder galvanizing method, comprising the following steps:

[0062] 1) Anti-rust treatment of machined steel parts

[0063] After finishing or final machining of machined steel parts, the machined surface is coated with anti-rust oil for oil sealing, and no other surface treatment is performed before the pre-treatment process of powder galvanizing;

[0064] 2) Pre-processing

[0065] Use ultrasonic cleaning to remove oil stains on the surface of the workpiece;

[0066] 3) Heating zinc sherardizing

[0067] Before the parts are loaded into the furnace, the parts are hot-dip galvanized after being bundled with barbed wire.

Embodiment 3

[0069] A method for mechanically processing thin-walled iron and steel cylinder parts without hydrogen embrittlement and low surface damage powder galvanizing method, comprising the following steps:

[0070] 1) Anti-rust treatment of machined steel parts

[0071] After finishing or final machining of machined steel parts, the machined surface is coated with anti-rust oil for oil sealing, and no other surface treatment is performed before the pre-treatment process of powder galvanizing;

[0072] 2) Pre-processing

[0073] Use ultrasonic cleaning to remove oil stains on the surface of the workpiece;

[0074] 3) Heating zinc sherardizing

[0075] Before the workpiece is loaded into the furnace, the workpiece is hot-dip galvanized after being treated by means of tooling isolation.

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Abstract

The invention relates to a non-hydrogen embrittlement and low surface damage zinc powder sherardizing processing process of a machined steel product, belongs to the zinc powder sherardizing technology in the field of thermal surface processing and aims at solving the problems of hydrogen embrittlement and surface damage of the machined steel product in the zinc powder sherardizing process. According to the technical scheme, according to a zinc powder sherardizing method of the machined steel product with no hydrogen embrittlement and low surface damage disclosed by the invention, with the adoption of the technical scheme of antirust processing after steel product machining, non hydrogen embrittlement zinc powder sherardizing pre-processing, non surface damage zinc powder sherardizing pre-processing and low surface damage heating zinc sherardizing processing, the machined steel product is capable of realizing non-hydrogen embrittlement and low surface damage zinc powder sherardizing.

Description

technical field [0001] The invention relates to a hydrogen-brittle-free and low-surface-damage treatment process for powder zinc sherardizing of mechanically processed iron and steel products, which belongs to the powder zinc sherardization technology in the field of heat surface treatment. Background technique [0002] Traditional "powder galvanizing technology for iron and steel parts". Powder galvanizing, also known as hot galvanizing, is one of the solid-state multi-component co-infiltration surface strengthening technologies. Solid multi-component co-infiltration surface strengthening technology is a kind of chemical heat treatment process that uses the infiltration and diffusion of metal atoms in a heated state to infiltrate one or more metal elements into the surface of metal parts to form an alloy protective layer, published in 2008 The American ASTM standard refers to the protective coating formed by this process as a thermal diffusion coating. The thermal diffusio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C10/36
CPCC23C10/36
Inventor 王威上官洛奎孔令飞沈云霄艾敏李海燕崔沈泽申素梅朱淼
Owner CHANGZHI QINGHUA MACHINERY FACTORY
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