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A kind of tin-containing ferritic stainless steel plate and its manufacturing method

A technology of stainless steel plate and tin ferrite, which is applied in the field of tin-containing ferritic stainless steel plate and its manufacture, can solve the problems of easy cracking of stainless steel, increase the amount of steel billet grinding, reduce the Sn content of ferritic stainless steel, etc., and achieve good Formability and corrosion resistance, improvement of hot workability, and good formability

Active Publication Date: 2011-12-14
SHANXI TAIGANG STAINLESS STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

No strong sulfide-forming elements are added to the tin-containing ferritic stainless steel plate developed by Nippon Steel and Sumitomo Metal, which can easily lead to the formation of low-melting tin sulfide (~750°C), thereby reducing the solid-solution Sn content in ferritic stainless steel , reducing the corrosion resistance of tin-containing ferritic stainless steel plates
In addition, the formation of tin sulfide can lead to deterioration of the hot workability of stainless steel
Since the hot rolling temperature range of ferritic stainless steel is 1060-880 °C, during the hot rolling process, tin sulfide is in a molten state at the phase boundary and grain boundary, which will reduce the bonding force of the steel, and the difference in thermal expansion coefficient between tin sulfide and the matrix leads to Stainless steel is very easy to crack during thermal processing, which not only increases the grinding amount of the billet but also causes a lot of waste products

Method used

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  • A kind of tin-containing ferritic stainless steel plate and its manufacturing method

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Experimental program
Comparison scheme
Effect test

Embodiment 2

[0052] The thickness of the cold-rolled plate is 1mm, and the mass percentage of its composition is:

[0053] C 0.0032%; N 0.0081%; Al 0.01%; Si 0.46%;

[0054] Mn 0.09%; Cr 17.05%; P 0.008%; S 0.009%;

[0055] Ni 0.2%; Cu 0.005%; Mo 0.005%; Sn 0.33%;

[0056] Ti 0.12%; Nb 0.12%; Ga 0.01%; Pr 0.05%;

[0057] Nd 0.15%; and 0.55(Pr+Nd)+1.14Ga>2S.

[0058] The rest is Fe and unavoidable impurities.

[0059] The tin-containing ferritic stainless steel plate in this example has a grain size of grade 8 and a {111} orientation texture.

[0060] Example 3 of tin-containing ferritic stainless steel plate

[0061] The thickness of the cold-rolled plate is 0.6mm, and the mass percentage of its composition is:

[0062] C 0.005%; N 0.0056%; Al 0.3%; Si 0.02%; Mn 0.1%;

[0063] Cr 12.5%; P 0.005%; S 0.008%; Ni 0.2%; Cu 0.03%;

[0064] Mo 0.1%; Sn 0.1%; Ti 0.3%; Nb 0.01%; Ga 0.1%;

[0065] La 0.036%; Ce 0.051%; Pr 0.005%; Nd 0.008%;

[0066] And 0.55(La+Ce+Pr+Nd)+1.14Ga>2S. The re...

Embodiment 3

[0135] What this method embodiment manufactured was the product of the tin-containing ferritic stainless steel plate embodiment three, and its main manufacturing steps were as follows:

[0136] Smelting means that the pretreated molten iron is smelted into molten steel by a converter, and then refined by a vacuum oxygen blowing decarburization furnace (VOD furnace) and a ladle refining furnace (LF furnace). Add pure tin, pure gallium and La-Ce-Pr-Nd mixed rare earth alloy, (add 1kg of pure tin per ton of molten steel; 1kg of pure gallium; 1kg of La-Ce-Pr-Nd mixed rare earth alloy):

[0137] C 0.005%; N 0.0056%; Al 0.3%; Si 0.02%; Mn 0.1%;

[0138] Cr 12.5%; P 0.005%; S 0.008%; Ni 0.2%; Cu 0.03%;

[0139] Mo 0.1%; Ti 0.3%; Nb 0.01%; the rest is Fe and unavoidable impurities. The molten steel temperature is 1610±10°C.

[0140] After adding pure tin, pure gallium and La-Ce-Pr-Nd mixed rare earth alloy, the mass percentage of the composition of molten steel reaches the followin...

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Abstract

The invention relates to a tin-containing ferrite stainless steel plate and a manufacturing method thereof. The stainless steel plate comprises the following components in percentage by weight: 0.001 to 0.02 percent of C, 0.001 to 0.02 percent of N, 0.001 to 1 percent of Al, 0.001 to 1.5 percent of Si, 0.001 to 0.5 percent of Mn, 11 to 30 percent of Cr, less than 0.05 percent of P, less than 0.1 percent of S, 0.001 to 5 percent of Ni, 0.001 to 1.5 percent of Cu, 0.001 to 5 percent of Mo, 0.01 to 2 percent of Sn, 0.001 to 2 percent of Ti, 0.001 to 2 percent of Nb, 0.001 to 0.5 percent of Ga, more than or equal to 0 and less than or equal to 1 percent of RE, and the balance of Fe and inevitable impurities. In the manufacturing method, pure tin, pure gallium and rare-earth alloy are added into molten steel after the molten steel is molten by a converter and refined by a vacuum oxygen blowing decarburization furnace and a smelting ladle furnace; and a plate blank is subjected to continuous casting, hot rolling, annealing, acid pickling, cold rolling and thermal treatment to prepare a steel plate. The tin-containing ferrite stainless steel plate manufactured by the method has the advantages of good hot workability, good corrosion resistance and good forming property.

Description

technical field [0001] The invention relates to a tin-containing ferritic stainless steel plate and a manufacturing method thereof. Background technique [0002] The structure of ferritic stainless steel is ferrite, which determines its poor plasticity and toughness, and its formability is not as good as that of austenitic stainless steel. Applications in deep drawing fields such as electrical appliances; secondly, ferritic stainless steel is characterized by its good resistance to chloride stress corrosion cracking, but it is sensitive to intergranular corrosion, pitting corrosion and crevice corrosion. Cr is the main element of ferritic stainless steel (its content ≥ 11wt.%). By increasing the chromium content, or adding noble metal elements Ni and Mo, the corrosion resistance of ferritic stainless steel can be improved to a certain extent, but the manufacturing cost increases. The formability of ferritic stainless steel is reduced. In addition, my country's chromium ore...

Claims

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Application Information

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IPC IPC(8): C22C38/50C22C38/60C21C7/00C21D1/74
Inventor 张晶晶范光伟王志斌刘春来邹勇秦丽雁张保亮张心保
Owner SHANXI TAIGANG STAINLESS STEEL CO LTD
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