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Austenitic stainless steel

A technology of austenitic stainless steel and chemical composition, applied in the field of austenitic stainless steel for deep drawing, can solve the problem of saving without advantages, and achieve the effects of price reduction, good mechanical properties, and good production and processing performance

Inactive Publication Date: 2008-09-24
SUZHOU CHANGHONG SPECIAL STEEL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Obviously, the reserves of chromium and nickel are relatively high, so there is no advantage in saving chromium and nickel resources and reducing material costs

Method used

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  • Austenitic stainless steel
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Experimental program
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Embodiment

[0023] The austenitic stainless steel of the present invention can be smelted in a non-vacuum induction furnace or an electric arc furnace. The thermal processing (forging or hot rolling) temperature range of the ingot is 1130-1200°C, and the solution heat treatment temperature is 1050-1115°C.

[0024] The austenitic stainless steel of the present invention mainly produces hot-rolled strips, cold-rolled strips, hot-rolled plates and bars, and the like.

[0025] Six examples of the austenitic stainless steel of the present invention are summarized in Table 1, and the chemical composition comparison of the sample of the austenitic stainless steel of the present invention and the contrast steel is also given in this table, wherein: the contrast steel A is 304, B is 201.

[0026] Table I

[0027]

[0028] The excellent mechanical properties and deep drawing properties of the austenitic stainless steels obtained in the above six embodiments of the present invention are shown i...

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PUM

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Abstract

The invention relates to an austenitic stainless steel, in particular to an austenitic stainless steel used for the deep punching of high manganese and low nickel. The chemical components of the invention according to the weight percentage are: 0.06 to 0.08 percent of C, 8.80 to 9.20 percent of Mn, 14.20 to 14.60 percent of Cr, 1.70 to 1.80 percent of Ni, 1.45 to 1.55 percent of Cu, 0.030 to 0.040 percent of Mo, 0.070 to 0.090 percent of N and the rest is Fe. The austenitic stainless steel has the advantages of: 1) being suitable for being used under the weak-corrosion environments such as the fields of hardware fitting, kitchenware, tableware etc. and being able to replace the austenitic stainless steels like 304 and 201; 2) having excellent mechanical properties and excellent manufacture processing prosperities (the total deformation capacity of cold rolling is 70 to 80 percent) and deep punching properties (the cupping test value of 0.50mm is larger than 12); 3) improving the content of Mn so as to save nickel which is expensive caused by energy lack; thereby reducing the price of the austenitic stainless steel; 4) adding a certain amount of Mo to increase the anti-corrosion property of the steel.

Description

technical field [0001] The invention relates to an austenitic stainless steel for deep drawing, in particular to an austenitic stainless steel with high manganese and low nickel for deep drawing. Background technique [0002] At present, domestic and foreign stainless steel pipes, kitchen utensils, and tableware are still mostly made of 300-series and 200-series stainless steel, such as stainless steel 304 and stainless steel 201. These grades of stainless steel contain high chromium and nickel. The chromium and nickel contents of 304 grade stainless steel are 18.03% and 8.02% respectively; the chromium and nickel contents of 201 grade stainless steel are 17.13% and 4.85% respectively. However, due to the lack of chromium and nickel resources in our country, it not only leads to the high price of the aforementioned stainless steel, but also is not conducive to saving chromium and nickel which are strategic resources. Therefore, the applicant believes that for austenitic sta...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/58
Inventor 文智德
Owner SUZHOU CHANGHONG SPECIAL STEEL
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