Unlock instant, AI-driven research and patent intelligence for your innovation.

Surface chemical treatment method for improving abrasive resistance of steel material

A technology for surface chemical treatment and wear resistance, which is applied in the field of surface chemical treatment to improve the wear resistance of steel, and can solve the problems of high cost and unfriendly environment.

Active Publication Date: 2015-04-08
SOUTHEAST UNIV
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] But on the other hand, the traditional surface strengthening treatment method of steel materials also has to face the disadvantages of complicated process, high cost and unfriendly to the environment. In view of this situation, it is expected to develop a better strengthening effect and simpler process And a more environmentally friendly surface strengthening process

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

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Surface chemical treatment method for improving abrasive resistance of steel material
  • Surface chemical treatment method for improving abrasive resistance of steel material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] The surface of the 40Cr steel is pickled first, and then rinsed with clean water to remove surface stains and oxides. Put the 40Cr with a clean surface into an oven at 120°C for vacuum drying until the surface is completely dry. Put the dried iron and steel materials into the autoclave and add the prepared molybdenum acid solution with a concentration of 100g / L until submerged, and adjust the pH value of the reaction solution between 2 and 3 with sulfuric acid. After the autoclave is installed, start heating and pressurize with nitrogen. After the material reacts for 2 hours under the conditions of 150±5°C, 1.5~1.8MPa, and pH value 2~3, start decompression, cool down and remove the 40Cr. Put the taken out 40Cr into a tubular resistance furnace and heat it to 700°C with hydrogen for 30min~45min. After cooling with the furnace, take out the cleaned surface and dry it until the surface is completely dry, then apply anti-rust oil to get the finished product.

Embodiment 2

[0033] Pickling the surface of steel with grade Cr12 first, and then rinsing it with clean water to remove surface stains and oxides. Put the Cr12 with a clean surface into an oven at 120°C for vacuum drying until the surface is completely dry. Put the dried iron and steel materials into the autoclave and add the prepared molybdenum acid solution with a concentration of 120g / L until submerged, and adjust the pH value of the reaction solution between 2 and 3 with sulfuric acid. After the autoclave is installed, start heating and pressurize with nitrogen. After the material reacts for 2 hours under the conditions of 160±5°C, 1.5~1.8MPa, and pH value 2~3, start to depressurize. Cool down and remove the Cr12 from the autoclave. Put the taken out Cr12 into a tubular resistance furnace and heat it to 730°C with hydrogen for 30min~45min. After cooling with the furnace, take out the cleaned surface and dry it until the surface is completely dry, then apply anti-rust oil to get the fi...

Embodiment 3

[0035] Pickling the surface of the grade 4Cr13 steel, then rinsing with clean water to remove surface stains and oxides. Put the 4Cr13 with a clean surface into a 120°C oven for vacuum drying until the surface is completely dry. Put the dried iron and steel materials into the autoclave and add the prepared molybdenum acid solution with a concentration of 150g / L until submerged, and adjust the pH value of the reaction solution between 2 and 3 with sulfuric acid. After the autoclave is installed, start heating and pressurize with nitrogen. After the material reacts for 2 hours under the conditions of 180±5°C, 1.5~1.8MPa, and pH value 2~3, start to reduce the pressure, cool down and remove the 4Cr13 from the autoclave. Put the taken out 4Cr13 into a tubular resistance furnace and heat it to 750°C with hydrogen for 30min~45min. After cooling with the furnace, take out the cleaned surface and dry it until the surface is completely dry, then apply anti-rust oil to get the finished ...

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

PropertyMeasurementUnit
concentrationaaaaaaaaaa
concentrationaaaaaaaaaa
concentrationaaaaaaaaaa
Login to View More

Abstract

The invention discloses a surface chemical treatment method for improving the abrasive resistance of a steel and iron material. The method comprises the steps of removing dirt and oxides on the surface of a steel and iron material, an drying, reacting the dried steel and iron material in a reaction kettle together with a reactant, wherein the reactant is 100-150g / L of molybdic acid ammonia water solution, and the reaction conditions are as follows: the pH value is 2-3, the temperature is 150-180 DEG C, the pressure is 1.5-1.8Mpa after pressurizing through filling an inert gas, and the time is 2-3 hours; and heating the reacted steel and iron material to 700-750 DEG C in a reducing atmosphere, and preserving heat for 30-45min. According to the method disclosed by the invention, 0.1-0.3mm of a molybdenum-enriched metal compound layer can grow on the surface of the steel and iron material, so as to enhance strength, corrosion resistance and abrasive resistance of the steel and iron material. Waste liquid generated from reaction can be recycled after regulating the concentration of ammonium molybdate, and the entire process had the characteristics of environmental protection, economic performance, simple operation and the like.

Description

technical field [0001] The invention relates to a method for chemically treating the surface of iron and steel materials to improve the hardness and wear resistance of the materials. Background technique [0002] Steel is the most produced metal in the world, and the world consumes a large amount of steel every year. Steel has high mechanical strength and good processing performance. It can be easily processed into various products and is widely used in various industries. The manufacture of various mechanical equipment, building materials and daily utensils is inseparable from steel. [0003] One of the main reasons for the consumption and failure of steel is wear and tear. According to relevant statistics, wear and tear in the world causes about one-third of steel energy and raw materials to be consumed in vain every year, and the direct or indirect economic losses caused by wear and tear have reached hundreds of billions of yuan. Therefore, improving the wear resistance...

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 Patents(China)
IPC IPC(8): C23C22/40C23C22/82
Inventor 巨佳薛烽周健白晶孙扬善
Owner SOUTHEAST UNIV