Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Steel piece surface treatment method

A technology for surface treatment and steel parts, applied in the direction of metal material coating process, coating, solid diffusion coating, etc., can solve the problems of easy cracking, volatilization, and affecting the performance of stainless steel products between the protective coating and the stainless steel substrate. The effect of easy process control, good quality of infiltration layer and stable surface performance

Inactive Publication Date: 2018-02-09
江苏徐钢钢铁集团有限公司
View PDF3 Cites 0 Cited by
  • 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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] A method for surface treatment of steel parts, comprising the steps of:

[0017] (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;

[0018] (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;

[0019] (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;

[0020] (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

[0026] A method for surface treatment of steel parts, comprising the steps of:

[0027] (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;

[0028] (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;

[0029] (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;

[0030] (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

[0033] A method for surface treatment of steel parts, comprising the steps of:

[0034] (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;

[0035] (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;

[0036] (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;

[0037] (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. ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a steel piece surface treatment method which comprises the following steps of cutting out a steel sample in a size of 10*10*5mm as a substrate, and selecting massive pure aluminum as a source material; and after performing multi-pass sanding and mechanism polishing on the steel sample and sequentially cleaning and drying the steel sample, performing alumetizing treatment with a double glow plasma surface alloying vacuum furnace, using a stainless steel cylinder as an auxiliary cathode, placing the substrate and the massive pure aluminum in the auxiliary cathode, starting surface treatment, and cooling the treated sample to a room temperature with the furnace. The steel piece surface treatment method is simple to operate, is environmentally friendly without pollutionin the implementation process and is liable in control of technology and good in alloying layer quality with the surface main components being NiAl and Ni3Al, so that the binding force between an alloying layer and a matrix is improved. By adopting the steel piece surface treatment method, a more intact and dense aluminum surface layer is formed on the surface of stainless steel, so that corrosion can be effectively resisted; and after the surface is formed with an oxide film, oxygen atoms can be effectively from further permeating into the surface, and the whole surface performance is stable.

Description

technical field [0001] The invention relates to a method for surface treatment of steel parts, 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 t...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C23C10/28C23C10/02
CPCC23C10/28C23C10/02
Inventor 贾守华陈善辉罗锋
Owner 江苏徐钢钢铁集团有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com