Processable nickel-saving type austenitic stainless steel and production method thereof

A technology of austenitic stainless steel and a manufacturing method, applied in the field of metal materials, can solve the problems of insufficient corrosion resistance and many surface defects, and achieve the effects of improving purity, reducing production costs and broad application prospects.

Inactive Publication Date: 2013-03-27
SICHUAN JINGUANG TECH DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to overcome the problems of insufficient corrosion resistance and many surface defects of the traditional nickel-saving austenitic stainless steel

Method used

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  • Processable nickel-saving type austenitic stainless steel and production method thereof
  • Processable nickel-saving type austenitic stainless steel and production method thereof
  • Processable nickel-saving type austenitic stainless steel and production method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Using nickel-containing pig iron as the base material, its main chemical composition is: C 4.17%, S 0.16%, P 0.052%, Si 0.78%, Ni 1.68%, the balance is Fe, and high carbon is added at 242kg per ton of steel ferrochrome. Add it to the electric furnace to smelt the stainless steel mother liquor, the electric furnace smelting time is 105min, and the electric furnace tapping temperature is 1602°C; then the obtained stainless steel mother liquor is added to the GOR refining furnace, the quality of the manganese alloy added is 102kg / t steel, and the electrolytic copper is added The steel with a mass of 16.5kg / t is alloyed, the smelting time is 102min, and the tapping temperature is 1552°C. Alloyed molten steel is obtained, its chemical composition is by mass percentage: C 0.07%, Si 0.44%, Mn 9.74%, S 0.003%, P 0.035%, Ni 1.07%, Cr 14.57%, Cu 1.63%, N 0.14%, The balance is Fe.

[0043] The molten steel is then sent to LF for treatment, and the temperature of the molten steel...

Embodiment 2

[0057] Using nickel-containing pig iron as the base material, its main chemical composition is: C 4.27%, S 0.13%, P 0.051%, Si 0.85%, Ni 1.63%, the balance is Fe, and high carbon is added at 281kg per ton of steel ferrochrome. Add it to the electric furnace to smelt the stainless steel mother liquor. The electric furnace smelting time is 119min, and the electric furnace tapping temperature is 1610°C; then the obtained stainless steel mother liquor is added to the GOR refining furnace. The quality of copper is 17.9kg / t steel alloying smelting time is 99min, and the tapping temperature is 1548℃. Alloyed molten steel is obtained, and its chemical composition is by mass percentage: C0.065%, Si 0.43%, Mn 9.46%, S 0.003%, P 0.037%, Ni 0.79%, Cr 16.78%, Cu 1.78%, N 0.15% , the balance being Fe.

[0058] The molten steel is then sent to LF for treatment, and the temperature of the molten steel is raised to 1538°C by electric heating through the LF furnace. After micro-alloying of f...

Embodiment 3

[0072] Using nickel-containing pig iron as the base material, its main chemical composition is: C 4.5%, S 0.15%, P 0.049%, Si 0.80%, Ni 1.69%, and the balance is Fe. Carbon ferrochrome. Add it to the electric furnace to smelt the stainless steel mother liquor. The electric furnace smelting time is 99min, and the electric furnace tapping temperature is 1605°C; then the obtained stainless steel mother liquor is added to the GOR refining furnace, and at the same time, the quality of the manganese alloy is added to 122kg / t steel, and the electrolytic copper is added. The quality of the steel is 21.2kg / t for alloying, the smelting time is 102min, and the tapping temperature is 1550℃. Alloyed molten steel is obtained, its chemical composition is by mass percentage: C0.085%, Si 0.47%, Mn 11.86%, S 0.003%, P 0.034%, Ni 2.32%, Cr 15.69%, Cu 2.10%, N 0.13% , the balance being Fe.

[0073] The molten steel is then sent to LF for treatment, and the molten steel is heated up to 1540°C by...

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Abstract

The invention relates to the field of metal materials, and in particular relates to a processable nickel-saving type austenitic stainless steel and a production method thereof, solving the technical problems of insufficient corrosion resistance and more surface defects of a conventional nickel-saving type austenitic stainless steel. The technical scheme is as follows: the processable nickel-saving type austenitic stainless steel comprises the following components by weight percent: larger than or equal to 0.04% and less than or equal to 0.10% of C, less than or equal to 1.00% of Si, larger than or equal to 9.0% and less than or equal to 12.0% of Mn, less than or equal to 0.045% of S, less than or equal to 0.060% of P, larger than or equal to 0.5% and less than or equal to 2.5% of Ni, more than or equal to 14.0% and less than or equal to 17.0% of Cr, more than or equal to 15% and less than or equal to 2.5% of Cu, more than or equal to 0.05% and less than or equal to 0.25% of N, more than or equal to 20*10<-4>% and less than or equal to50*10<-4>% of B, more than or equal to 20*10<-4>% and less than or equal to 60*10<-4>% of Ca and the balance of Fe. The austenitic stainless steel provided by the invention has a wide application prospect.

Description

technical field [0001] The invention relates to the field of metal materials, in particular to a machinable nickel-saving austenitic stainless steel and a manufacturing method thereof. Background technique [0002] my country's stainless steel production exceeds one-third of the world's total. With the increase in production, the supply and demand for raw materials have also increased significantly. At the same time, my country is also a country that is very short of nickel and chromium. Due to the late development of stainless steel consumption, the return of stainless steel Also very little. As a result, most of my country's stainless steel raw materials depend on imports, especially nickel metal. This seriously restricts the healthy development of stainless steel production in my country, so the development of nickel-saving stainless steel is the main direction of all stainless steel factories. [0003] Domestic colleges and universities and stainless steel production en...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/60C22C38/58
Inventor 韦成贵李志栋杜俊涛
Owner SICHUAN JINGUANG TECH DEV
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