Stable corrosion-resistant stainless steel part

A stainless steel, corrosion-resistant technology, applied in the direction of ion implantation plating, metal material coating process, coating, etc., can solve the problems of volatilization, affecting the performance of stainless steel products, and easy detachment of protective coating and stainless steel substrate. Stable performance and good quality effect

Inactive Publication Date: 2018-01-30
铜山县利国钢铁有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in vacuum sintering, the anti-rust Cr element in stainless steel will volatilize, thus affecting the performance of stainless steel products
Therefore, it can be considered to apply a protective coating on the surface of stainless steel to increase its corrosion resistance. However, practice has proved that the protective coating and the stainless steel substrate are easily detached, so how to improve the corrosion resistance of the stainless steel surface is a top priority.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] A method for surface treatment of steel parts, comprising the steps of:

[0012] (1) A steel sample with a size of 10*10*5mm is taken as the base material, and block pure aluminum is used as the source material;

[0013] (2) The steel sample was polished with sandpaper for multiple passes, and then mechanically polished with 0.5 μm diamond spray polishing agent, then ultrasonically cleaned in acetone, alcohol, and deionized water for 10 minutes, dried, and packaged for use;

[0014] (3) Carry out aluminizing treatment with a double-layer glow plasma metal infiltration vacuum furnace, use a stainless steel cylinder as an auxiliary cathode, and place the base material and block pure aluminum in the auxiliary cathode;

[0015] (4) Start surface treatment: process parameters are frequency 55Hz, pole spacing 15mm, holding temperature 800°C, holding time 2h, source voltage 400V, cathode voltage 250V, after treatment the sample is cooled to room temperature with the furnace. ...

Embodiment 2

[0022] A method for surface treatment of steel parts, comprising the steps of:

[0023] (1) A steel sample with a size of 10*10*5mm is taken as the base material, and block pure aluminum is used as the source material;

[0024] (2) The steel sample was polished with sandpaper for multiple passes, and then mechanically polished with 0.5 μm diamond spray polishing agent, then ultrasonically cleaned in acetone, alcohol, and deionized water for 10 minutes, dried, and packaged for use;

[0025] (3) Carry out aluminizing treatment with a double-layer glow plasma metal infiltration vacuum furnace, use a stainless steel cylinder as an auxiliary cathode, and place the base material and block pure aluminum in the auxiliary cathode;

[0026] (4) Start surface treatment: process parameters are frequency 60Hz, pole spacing 20mm, holding temperature 900°C, holding time 3h, source voltage 600V, cathode voltage 350V, after treatment the sample is cooled to room temperature with the furnace. ...

Embodiment 3

[0029] A method for surface treatment of steel parts, comprising the steps of:

[0030] (1) A steel sample with a size of 10*10*5mm is taken as the base material, and block pure aluminum is used as the source material;

[0031] (2) The steel sample was polished with sandpaper for multiple passes, and then mechanically polished with 0.5 μm diamond spray polishing agent, then ultrasonically cleaned in acetone, alcohol, and deionized water for 10 minutes, dried, and packaged for use;

[0032] (3) Carry out aluminizing treatment with a double-layer glow plasma metal infiltration vacuum furnace, use a stainless steel cylinder as an auxiliary cathode, and place the base material and block pure aluminum in the auxiliary cathode;

[0033] (4) Start surface treatment: process parameters are frequency 55Hz, pole spacing 15mm, holding temperature 800°C, holding time 2h, source voltage 500V, cathode voltage 300V, after treatment the sample is cooled to room temperature with the furnace. ...

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Abstract

The invention discloses a stable corrosion-resistant stainless steel part which comprises a substrate, wherein the substrate is made of stainless steel; the surface of the substrate is covered by a corrosion resistant layer; the thickness of the corrosion resistant layer is 28-30 [mu]m; the corrosion resistant layer comprises components of NiAl and Ni3Al; the ratio of NiAl to Ni3Al is (1-5):(1-7).The stable corrosion-resistant stainless steel part is good in quality, the surface of the stable corrosion-resistant stainless steel part comprises the main components of NiAl and Ni3Al, and the binding force of a seepage layer and the substrate is improved; along with time, a relatively complete and dense corrosion-resistant aluminum oxide surface layer is formed on a stainless steel surface, and thus corrosion can be effectively prevented. After an oxide film is formed on the surface, further seepage of oxygen atoms can be effectively prevented, and overall surface property stability is achieved.

Description

technical field [0001] The invention relates to a stable corrosion-resistant steel part, which belongs to the field of metal processing. Background technique [0002] Due to its excellent performance, stainless steel has been widely used in all aspects of production and life. Finished stainless steel can be obtained in a number of ways. In powder metallurgy, stainless steel powder is densified by high-temperature sintering to obtain products, among which vacuum sintering is a very common method. However, in vacuum sintering, the anti-rust Cr element in stainless steel will volatilize, thereby affecting the performance of stainless steel products. Therefore, it can be considered to apply a protective coating on the surface of stainless steel to increase its corrosion resistance. However, practice has proved that the protective coating and the stainless steel substrate are easily detached, so how to improve the corrosion resistance of the stainless steel surface is a top pri...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C14/48C23C14/16
Inventor 齐正银郑庆海杨斌么高永
Owner 铜山县利国钢铁有限公司
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