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

Method for improving surface quality of stainless steel

A surface quality, stainless steel technology, applied in the direction of coating, metal material coating process, solid-state diffusion coating, etc., can solve the problem that the wear resistance cannot meet the demand, and achieve the reduction of surface friction coefficient, surface hardness and surface wear resistance Improved performance and improved fatigue resistance

Active Publication Date: 2017-06-13
广州金来德展柜制作有限公司
View PDF4 Cites 10 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Stainless steel has good hardness, wear resistance, good corrosion resistance, excellent appearance and long life. It is widely used in construction, automobile industry, shipbuilding industry, marine equipment, mechanical equipment and chemical equipment and other industries. In special occasions, the hardness and wear resistance of ordinary stainless steel cannot meet the requirements, so further treatment is required on the surface of stainless steel to improve its surface quality

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

[0017] A method for improving the surface quality of stainless steel, comprising the steps of:

[0018] (1) Soak stainless steel in a sodium citrate solution with a mass concentration of 1.8% at 58°C for 25 minutes, then filter, then put the stainless steel workpiece into water at 75°C, use graphite as the cathode and anode of the electrode, and add The water is electrolyzed, and the temperature of the water is kept at 75°C during the period. After electrolysis for 10 minutes, the stainless steel workpiece is taken out;

[0019] (2) Put it into the nitriding furnace, raise the temperature of the furnace to 350°C, continue to feed nitrogen, and carry out the first stage of nitriding treatment, adjust the pressure in the furnace to 130MPa, keep it for 110min, and then raise the furnace temperature to 640 ℃, carry out the second stage of nitriding treatment, stop feeding nitrogen, feed the dried hydrogen gas, and feed ammonia gas after 12 minutes, adjust the ratio of ammonia gas ...

Embodiment 2

[0029] A method for improving the surface quality of stainless steel, comprising the steps of:

[0030] (1) Soak stainless steel in a sodium citrate solution with a mass concentration of 1.8% at 58°C for 25 minutes, then filter, then put the stainless steel workpiece into water at 75°C, use graphite as the cathode and anode of the electrode, and add The water is electrolyzed, and the temperature of the water is kept at 75°C during the period. After electrolysis for 10 minutes, the stainless steel workpiece is taken out;

[0031] (2) Put it into the nitriding furnace, raise the temperature of the furnace to 460°C, continue to feed nitrogen, and carry out the first stage of nitriding treatment, adjust the pressure in the furnace to 160MPa, keep it for 130min, and then raise the furnace temperature to 660 ℃, carry out the second stage of nitriding treatment, stop feeding nitrogen, feed the dried hydrogen gas, and feed ammonia gas after 12 minutes, adjust the ratio of ammonia gas ...

Embodiment 3

[0041] A method for improving the surface quality of stainless steel, comprising the steps of:

[0042] (1) Soak stainless steel in a sodium citrate solution with a mass concentration of 1.8% at 58°C for 25 minutes, then filter, then put the stainless steel workpiece into water at 75°C, use graphite as the cathode and anode of the electrode, and add The water is electrolyzed, and the temperature of the water is kept at 75°C during the period. After electrolysis for 10 minutes, the stainless steel workpiece is taken out;

[0043] (2) Put it into the nitriding furnace, raise the temperature of the furnace to 420°C, continue to feed nitrogen gas, and carry out the first stage of nitriding treatment, adjust the pressure in the furnace to 150MPa, keep it for 120min, and then raise the furnace temperature to 650 ℃, carry out the second stage of nitriding treatment, stop feeding nitrogen, feed the dried hydrogen gas, and feed ammonia gas after 12 minutes, adjust the ratio of ammonia ...

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 belongs to the technical field of stainless steel, and in particular, relates to a method for improving surface quality of stainless steel. The method comprises the steps of: (1) dipping by sodium citrate solution; (2) nitriding; (3) cooling after nitriding; (4) radiation; and (5) reinforced radiation. After compound treatment in all steps of the method, the surface of the stainless steel is higher in hardness and excellent in wear resistance; a layer of thick and compact passivation film is formed on the outermost layer, in particular, the surface depth of the stainless steel reaches 120 microns; the microscopic hardness in a surface layer is largely increased; the surface coefficient coefficient is reduced; and the surface wear resistance is prominently improved.

Description

technical field [0001] The invention belongs to the technical field of stainless steel, and in particular relates to a method for improving the surface quality of stainless steel. Background technique [0002] Stainless steel has good hardness, wear resistance, good corrosion resistance, excellent appearance and long life. It is widely used in construction, automobile industry, shipbuilding industry, marine equipment, mechanical equipment and chemical equipment and other industries. In special occasions, the hardness and wear resistance of ordinary stainless steel cannot meet the requirements, so further treatment is required on the surface of stainless steel to improve its surface quality. Contents of the invention [0003] The purpose of the invention is to provide a method for improving the surface quality of stainless steel aiming at the existing problems. [0004] The present invention is achieved through the following technical solutions: a method for improving the ...

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
IPC IPC(8): C23C22/42C23C22/78C25F1/06C23C8/26C21D10/00
CPCC21D10/00C23C8/26C23C22/42C23C22/78C25F1/06
Inventor 洪功正潘永刚蔡永波
Owner 广州金来德展柜制作有限公司
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