Stainless steel plate for fuel tank of automobile and manufacturing method thereof

A stainless steel plate and manufacturing method technology, applied in the direction of the substructure, etc., can solve the problems affecting the service life of the material and the intergranular corrosion in the welding area, and achieve the effects of improving the resistance to intergranular corrosion, improving the welding performance and good weldability.

Inactive Publication Date: 2012-01-11
SHANXI TAIGANG STAINLESS STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Using ferritic stainless steel that does not contain precious metals nickel and molybdenum, the welding area is prone to intergranular corrosion, which affects the service life of the material

Method used

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  • Stainless steel plate for fuel tank of automobile and manufacturing method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] The steel plate thickness that the automobile fuel tank of the present embodiment is used is 1.4mm, and width 1120mm, and its chemical composition (percentage by weight) is:

[0030] C 0.010%; Si 0.26%; Mn 0.28%; Cr 21.53%;

[0031] P 0.015%; S 0.001%; ​​N 0.013%; Ti 0.32%;

[0032] Nb 0.95%; the rest is Fe and unavoidable impurities.

Embodiment 2

[0034] The steel plate thickness that the automobile fuel tank of the present embodiment is used is 1.2mm, and width 1120mm, and its chemical composition (percentage by weight) is:

[0035] C 0.009%; Si 0.21%; Mn 0.34%; Cr 19.75%;

[0036] P 0.012%; S 0.002%; N 0.011%; Ti 0.36%;

[0037] Nb 0.93%; the rest is Fe and unavoidable impurities.

Embodiment 3

[0039] The steel plate thickness that the automobile fuel tank of the present embodiment is used is 1.0mm, and width 1120mm, and its chemical composition (percentage by weight) is:

[0040] C 0.013%; Si 0.22%; Mn 0.32%; Cr 22.52%;

[0041] P 0.013%; S 0.001%; ​​N 0.009%; Ti 0.33%;

[0042] Nb 0.98%; the rest is Fe and unavoidable impurities.

[0043] Preparation method embodiment one

[0044] What this embodiment prepares is the steel plate of steel plate embodiment one

[0045] (1), smelting billets

[0046] It is smelted and cast into a billet with a converter→VOD furnace process, and the chemical composition (weight percentage) of the billet is:

[0047] C 0.010%; Si 0.26%; Mn 0.28%; Cr 21.53%;

[0048] P 0.015%; S 0.001%; ​​N 0.013%; Ti 0.32%;

[0049] Nb 0.95%; the rest is Fe and unavoidable impurities.

[0050] (2), billet hot rolling

[0051] The slab was heated in a closed heating furnace, the slab heating temperature was 1055° C., and the heating time was 180 ...

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Abstract

The invention relates to a stainless steel plate for a fuel tank of an automobile and a manufacturing method thereof. The stainless steel plate comprises the following chemical components, by weight, more than zero and equal to or less than 0.02% of C, 0.10-0.60% of Si, 0.10-0.60% of Mn, 19.0-24.0% of Cr, equal to or less than 0.020%, equal to or less than 0.010%, more than zero and equal to or less than 0.020%, 0.3-0.4% of Ti, 0.9-1.0% of Nb, and the balance Fe and avoidless impurities. The manufacturing method sequentially comprises the following steps: I, smelting a billet: carrying out primary smelting on molten iron and a chromium alloy with a K-OBM-S converter, carrying out refine processing with a VOD furnace, and casting into a casting billet when the component of molten steel reaches requirements; II, hot rolling the casting billet: heating to 1050-1070DEG C, rolling into stainless steel coil, and naturally cooling after hot rolling; and III, cold rolling the steel coil: controlling the roughness Ra of the surface of a cooled plate at 0.03-0.05mum. The stainless steel plate for the fuel tank of the automobile manufactured in the present invention has the advantages of good corrosion resistance and good weldability.

Description

technical field [0001] The invention relates to a stainless steel plate for an automobile fuel tank and a manufacturing method thereof. Background technique [0002] The steel plate for automobile fuel tank is a special automobile steel plate material. The fuel tank is an important safety part in the car, and the steel plate material used for the fuel tank must have a variety of excellent stamping properties, welding properties, and corrosion resistance. China is the fastest growing region of the automobile industry in the world, and many well-known automobile manufacturers in the world have already entered the Chinese market. China's automotive fuel tank steel plate material market is deeply influenced by foreign automakers and models. At present, the fuel tank materials of domestic trucks are basically made of steel materials and aluminum alloy materials. At present, the rapid development of my country's automobile industry has also put forward more demands for auto par...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/28C22C33/04C21D8/02B60K15/03
Inventor 刘洪涛邹勇
Owner SHANXI TAIGANG STAINLESS STEEL CO LTD
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