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High-nitrogen non-magnetic austenitic stainless steel and manufacturing method thereof

A high-nitrogen austenitic and magnetic austenitic technology, applied in high-nitrogen non-magnetic austenitic stainless steel hot-rolled sheet and its manufacture, and high-nitrogen non-magnetic austenitic stainless steel field, can solve the problem of low strength and difficult to achieve high Yield strength and toughness, non-magnetic, good matching of corrosion resistance, etc., to achieve the effect of good plastic toughness and corrosion resistance, good plastic toughness, high yield strength

Inactive Publication Date: 2018-05-08
宝武特种冶金有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The patents related to high-nitrogen austenitic stainless steel retrieved above involve high strength, high corrosion resistance and other application fields, but their strength is still low, and it is difficult to achieve a good match between high yield strength and toughness, non-magnetic properties, and corrosion resistance.

Method used

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  • High-nitrogen non-magnetic austenitic stainless steel and manufacturing method thereof
  • High-nitrogen non-magnetic austenitic stainless steel and manufacturing method thereof
  • High-nitrogen non-magnetic austenitic stainless steel and manufacturing method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0040] EAF (electric furnace) + AOD (argon oxygen decarburization furnace) + LF (ladle refining furnace) is used for smelting, casting 200mm continuous casting slabs, and the continuous casting control superheat is less than 50 ° C. The chemical composition is shown in Table 2. The continuous casting The billet is heated in a walking heating furnace, controlled rolling on the rolling mill to form a hot-rolled plate with a thickness of 20mm, the final rolling temperature is controlled at 870°C, air-cooled to room temperature, and the hot-rolled plate is then pickled to obtain a high-nitrogen Austrian It is a hot-rolled stainless steel plate with high yield strength, good ductility, non-magnetism and corrosion resistance. All properties are listed in Table 3.

Embodiment 2

[0042] EAF (electric furnace) + AOD (argon-oxygen decarburization furnace) + LF (ladle refining furnace) is used for smelting, casting 150mm continuous casting slabs, and the continuous casting control superheat is less than 50 ° C. The chemical composition is shown in Table 2. The continuous casting The billet is heated in a walking heating furnace, controlled rolling on a rolling mill to form a hot-rolled plate with a thickness of 10mm, the final rolling temperature is controlled at 820°C, air-cooled to room temperature, and the hot-rolled plate is then pickled to obtain a high-nitrogen Austrian It is a hot-rolled stainless steel plate with high yield strength, good ductility, non-magnetism and corrosion resistance. All properties are listed in Table 3.

Embodiment 3

[0044] EAF (electric furnace) + AOD (argon oxygen decarburization furnace) + LF (ladle refining furnace) is used for smelting, casting 350mm molded ingots, the chemical composition is shown in Table 2, and the molded ingots are put into the walking heating furnace Heating, controlled rolling on the rolling mill to form a hot-rolled plate with a thickness of 40mm, the final rolling temperature is controlled at 940°C, air-cooled to room temperature, and the hot-rolled plate is then pickled to obtain a finished high-nitrogen austenitic stainless steel hot-rolled plate. The product also has high yield strength, good ductility, non-magnetic properties and corrosion resistance. All properties are listed in Table 3.

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Abstract

The invention relates to high-nitrogen non-magnetic austenitic stainless steel. The high-nitrogen non-magnetic austenitic stainless steel comprises following chemical components including, by weight percent, 0.01% to 0.10% of C, not larger than 1.0% of Si, 17.0% to 24.0% of Mn, not larger than 0.035% of P, not larger than 0.015% of S, 1.0% to 4.0% of Ni, 17.0% to 24.0% of Cr, not larger than 1.0%of Mo, 0.50% to 0.80% of N and the balance Fe and inevitable impurities. The manufacturing method comprises the steps that the electric furnace+AOD+LF manner is adopted for smelting, continuous casting or die casting is adopted for making a slab ingot, and during continuous casting, the superheat degree is controlled to be smaller than 50 DEG C; a continuous casting blank or die casting slab ingotis put into a stepping type heating furnace to be heated, hot rolling on a rolling machine is carried out to form a board of the needed specification, the final rolling temperature ranges from 800 DEG to 950 DEG C, the hot-rolled board is subject to acid pickling, and the high-nitrogen non-magnetic austenitic stainless steel hot-rolled board finished product is obtained. The product has high yield strength, good ductility and toughness, corrosion resistance and wide application field and has no magnetism.

Description

technical field [0001] The invention relates to the field of stainless steel materials, and relates to a high-nitrogen non-magnetic austenitic stainless steel, in particular to a hot-rolled high-nitrogen non-magnetic austenitic stainless steel with high yield strength, good ductility, non-magnetism and corrosion resistance panels and methods of manufacture. Background technique [0002] At present, the austenitic stainless steel widely used at home and abroad is mainly 300 series. These steel types have good plasticity and corrosion resistance, but they have the problem of low strength, which also limits the application range of these steels. In order to improve the strength of austenitic stainless steel, it is a feasible way to develop high-nitrogen austenitic stainless steel. Compared with traditional nitrogen-containing or nitrogen-free austenitic stainless steel, high-nitrogen austenitic stainless steel has very excellent performance characteristics , the reason is that...

Claims

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Application Information

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IPC IPC(8): C22C38/58C22C38/44C22C33/04
CPCC22C33/04C22C38/001C22C38/44C22C38/58
Inventor 余式昌徐松乾庄伟邢钊
Owner 宝武特种冶金有限公司
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