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Ferritic stainless steel and preparation method thereof

A technology of stainless steel plate and ferrite, which is applied in the direction of metal rolling, etc., can solve the problems that the performance of ferritic stainless steel is not obvious and not achieved.

Inactive Publication Date: 2008-04-09
SHANXI TAIGANG STAINLESS STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the improvement of the performance of ferritic stainless steel by traditional technology is not significant, and the effect close to that of 304 austenitic steel has not yet been achieved.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The ultra-pure ferritic stainless steel plate thickness of the present embodiment is 1.0mm, wide 1200mm, and its chemical composition (percentage by weight) is:

[0028] C 0.008% Si 0.30% Mn 0.10% Cr 23.10%

[0029] P 0.035% S 0.004% Ni 0.32% Cu 0.20%

[0030] Mo 0.95% N 0.0110% Nb+Ti 0.30%

[0031] The rest is Fe and unavoidable impurities. (In this example, the content of Ni and Cu is low, which can generally be considered as residual elements brought in by scrap steel, etc.)

Embodiment 2

[0033] The ultra-pure ferritic stainless steel plate thickness of the present embodiment is 0.8mm, wide 1200mm, and its chemical composition (percentage by weight) is:

[0034] C 0.007% Si 0.25% Mn 0.35% Cr 20.20%

[0035] P 0.025% S 0.001% Ni 1.50% Cu 0.50%

[0036] Mo 0.30% N 0.0095% Nb+Ti 0.40%

[0037] The rest is Fe and unavoidable impurities.

Embodiment 3

[0039] The ultrapure ferritic stainless steel plate thickness of the present embodiment is 1.2mm, wide 1250mm, and its chemical composition (percentage by weight) is:

[0040] C 0.010% Si 0.40% Mn 0.50% Cr 19.80%

[0041] P 0.018% S 0.003% Ni 2.15% Cu 1.15%

[0042] Mo 1.95% N 0.0075% Nb+Ti 0.55%

[0043] The rest is Fe and unavoidable impurities.

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PUM

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Abstract

The invention is a ferrite stainless steel plate and a preparation method. The stainless steel plate consists of (in weight percentage): C is less than or equal to 0.03, Si is less than or equal to 1.00, Mn is less than or equal to 1.00, Cr:15-25, P is less than or equal to 0.035, S is less than or equal to 0.03, N is less than or equal to 0.03, 0.20 is less than or equal to Cu and Cu is less than or equal to1.5%, Ti+Nb0.2+4 multiplied by (C+N)-0.75, the rest being Fe and unavoidable impurity. The preparation method for the stainless steel plate is as follows: (1) the casting billet is smelted, the casting billet comprises (in weight percentage):C is less than or equal to 0.03, Si is less than or equal to 1.00, Mn is less than or equal to 1.00, Cr:15-25, P is less than or equal to 0.035, S is less than or equal to 0.03, N is less than or equal to 0.03, 0.20 is less than or equal to Cu and Cu is less than or equal to1.5%, Ti+Nb 0.2+4 multiplied by (C+N)-0.75, the rest being Fe and unavoidable impurity;(2) the casting billet is heated;(3) hot the casting billet is hot-rolled; (4)cold roll and anneal. The ferrite stainless steel plate has the anti-corrosion performance and the weldability close to the anti-corrosion performance and the weldability of stainless steel 304, the preparation method of the ferrite stainless steel can be just general preparation method.

Description

technical field [0001] The invention relates to a ferritic stainless steel plate and a preparation method thereof. Background technique [0002] Stainless steel is a special material, which has the characteristics of both functional materials and structural materials. Excellent performance is widely used in many fields of industry and civil. The consumption of stainless steel in the world is also increasing year by year. By 2006, the output of stainless steel in the world reached 28.4 million tons. 304 austenitic stainless steel has become the most widely used and most used steel grade among stainless steels due to its excellent corrosion resistance and ease of processing. Although 304 stainless steel has excellent properties, the precious metal nickel content is as high as 9%, so the price is high. In recent years, with the increase of stainless steel production, nickel consumption has also increased rapidly, making nickel resources more and more tense, nickel prices hav...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/02C22C38/04C22C38/20B21B1/02
Inventor 孙铭山范光伟王立新
Owner SHANXI TAIGANG STAINLESS STEEL CO LTD
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