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

Method for processing wear-resisting corrosion-resisting nitriding layer on surface of Fe-Mn series stainless steel

A processing method, stainless steel technology, applied in metal material coating process, coating, solid-state diffusion coating, etc., to achieve good atmospheric corrosion resistance, low processing cost, and stable quality

Inactive Publication Date: 2013-08-28
TAIZHOU UNIV
View PDF1 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the smelting of Fe-Mn-N austenitic steel has special technical requirements, and the research work on high-nitrogen austenitic steel in my country is in its infancy, and there are equipment and process problems in the production of high-nitrogen manganese austenitic steel that need further research

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

experiment example 1

[0009] Experimental Example 1: Program-controlled electric pulse type multifunctional ion bombardment furnace is used, the base material is 12Cr17MnNi6N (201) stainless steel, the temperature range of the bombardment furnace is 400-450°C, the furnace pressure is kept at 20-150 Pa, and the bombardment time is 4-5 hours , the gas source materials used in the ion bombardment treatment are industrial liquid ammonia and petroleum hydrocarbons, and the appearance of the ion nitriding layer obtained on the surface of the base material is gray. The thickness of the outermost layer of the nitrided layer obtained in this experimental example is about 25 μm, the thickness of the middle layer is about 10 μm, and the thickness of the transition layer is about 25 μm; the microhardness value is HV 0.1 1150~1200; X-ray diffraction results show that the nitrided layer contains FeNiN compounds, the nitrided layer and the matrix are well combined, no voids, loose, precipitated phases are found, a...

experiment example 2

[0010] Experimental Example 2: Program-controlled electric pulse type multifunctional ion bombardment furnace is used, the base material is 12Cr18Mn8Ni5N (202) stainless steel, the temperature range of the bombardment furnace is 450-500°C, the pressure of the bombardment furnace is kept at 50-200Pa, and the bombardment time is 5-6 hours , the gas source materials used in the ion bombardment treatment are industrial liquid ammonia and petroleum hydrocarbons, and the appearance of the ion nitriding layer obtained on the surface of the base material is gray. The thickness of the outermost layer of the nitrided layer obtained in this experimental example is about 35 μm, the thickness of the middle layer is about 20 μm, and the thickness of the transition layer is about 30 μm; the microhardness value is HV 0.1 1200~1250; X-ray diffraction results show that the nitrided layer contains FeNiN compounds, the nitrided layer and the matrix are well combined, no voids, loose, and precipita...

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
microhardnessaaaaaaaaaa
microhardnessaaaaaaaaaa
Login to View More

Abstract

The invention discloses a method for processing a wear-resisting corrosion-resisting nitriding layer on the surface of Fe-Mn series stainless steel. The method comprises the following steps of: a, washing the surface of a Fe-Mn series stainless steel workpiece, and removing an oxidation layer and grease dirt on the surface of a base material; b, putting the washed workpiece into a charging basket; c, feeding the workpiece into a program control electric pulse type multifunctional ion bombardment furnace together with the charging basket; d, keeping the pressure of the bombardment furnace in which industrial liquid ammonia and petroleum hydrocarbon are used as gas source materials to be between 20 and 200Pa, processing at the temperature of between 400 and 500 DEG C, and keeping the temperature for 6 to 8 hours; and e, taking the high-temperature workpiece and the charging basket out of the bombardment furnace, performing air cooling or oil cooling, and thus obtaining the nitriding layer on the surface of the workpiece. The nitriding layer contains FeNiN compounds, is combined with a matrix well, does not have gaps and precipitated phases, is not loose, and has the rigidity of HV0.1 1,150 to 1,250, first-grade brittleness, high abrasion resistance, high atmospheric corrosion resistance and stable quality.

Description

technical field [0001] The invention belongs to the technical field of metal surface nitriding treatment, and in particular relates to a processing method for a wear-resistant and corrosion-resistant nitriding layer on the surface of Fe-Mn series stainless steel. Background technique [0002] Since 2002, my country has continuously become the world's largest stainless steel consumer, and the share of Fe-Mn stainless steel has been increasing year by year. In 2006, the domestic production of Fe-Mn series stainless steel accounted for 28.6% of the total output of stainless steel; in 2008, Fe-Mn series stainless steel accounted for 90% of the output of stainless steel in private steel mills in China, and its demand and output growth rate have exceeded the average growth rate of other series of stainless steel. speed. In general corrosive media, the corrosion resistance of Fe-Mn stainless steel is lower than that of Ni-Cr stainless steel. But it is meaningful that in some spec...

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): C23C8/38
Inventor 朱流罗来马
Owner TAIZHOU UNIV