Low-aluminum-content and high-aging-resistance hot-rolling thin steel plate for cold formation and manufacturing method thereof

A technology of hot-rolled thin steel plate and aluminum content, which is applied in the direction of temperature control, etc., can solve the problems of poor product purity and poor anti-effectiveness, and achieve the effect of good edge quality, high timeliness, and easy purity

Active Publication Date: 2010-12-22
SHANGHAI MEISHAN IRON & STEEL CO LTD
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  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to provide a low-aluminum hot-rolled cold-formed sheet with high anti-aging performance and its manufacturing

Method used

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  • Low-aluminum-content and high-aging-resistance hot-rolling thin steel plate for cold formation and manufacturing method thereof
  • Low-aluminum-content and high-aging-resistance hot-rolling thin steel plate for cold formation and manufacturing method thereof
  • Low-aluminum-content and high-aging-resistance hot-rolling thin steel plate for cold formation and manufacturing method thereof

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Example Embodiment

[0015] The present invention will be further described below in conjunction with Embodiment 1-3. The composition distribution ratio of specific embodiment sees the following table 1:

[0016] The component distribution ratio of the present invention of table 1, component is % by weight, and balance is

[0017]

[0018] According to the requirements of the material composition design of the present invention, pre-desulfurization of molten iron is adopted, combined top-bottom blowing of converter, refining in LF furnace, low-carbon steel mold slag is used for continuous casting, Ar protection casting is used throughout the process, and continuous casting slabs are cast. After the continuous casting slab is reheated in the heating furnace, it is rolled on a continuous hot rolling mill. The process control is shown in Table 2 below, and the product thickness is 1.5-4.0mm.

[0019] Table 2 hot rolling process control parameters of the present invention

[0020]

[0021] T...

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Abstract

The invention relates to a hot-rolling thin steel plate for cold formation, in particular to a low-aluminum-content and high-aging-resistance hot-rolling thin steel plate for cold formation and a manufacturing method thereof, mainly solving the technical problems of poor aging resistance and slightly poor product purification degree of the traditional low-aluminum hot-rolling and cold-forming thin plate. The low-aluminum-content and high-aging-resistance hot-rolling thin steel plate for cold formation comprises the following elements in percentage by weight: 0.04%-0.08% of C, not more than 0.03% of Si, 0.2%-0.3% of Mn, not more than 0.025% of P, not more than 0.020% of S, 0.010%-0.018% of AlT and the balance of Fe. In the process control, the heating temperature of the hot-rolling plate is 1130 to 1180 DEG C, the rough-rolling ending temperature is 1000 to 1040 DEG C, the finish-rolling starting temperature is 920 to 950 DEG C, the finish-rolling ending temperature is 850 to 880 DEG C, and the rolling temperature is 550 to 650 DEG C. The hot-rolling thin steel plate obtained in the manufacturing method is directly used for cold formation and punching deformation or used as a raw plate of a cold-roll steel plate.

Description

Technical field: [0001] The invention relates to a hot-rolled thin steel plate for cold forming, in particular to a hot-rolled thin steel plate for cold forming with low aluminum content and high anti-aging performance and its manufacturing method. The original plate of cold rolled steel plate. Background technique: [0002] The hot-rolled thin steel plate used for cold forming is generally made of low-carbon aluminum-killed steel, which requires excellent cold forming processability. The production of this type of steel requires strict control of C and N in the steel, especially the content of N; as little non-metallic inclusions as possible, high cleanliness of molten steel, accurate control of chemical composition, and molten iron must be desiliconized, dephosphorized, and desulfurized before steelmaking and slag handling. During the steelmaking process, the appropriate oxygen content should be controlled to prevent excessive deoxidation products from being brought into...

Claims

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Application Information

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IPC IPC(8): C22C38/06B21B37/74C21D8/02
Inventor 胡恒法裴新华穆海玲周丽萍赵楠
Owner SHANGHAI MEISHAN IRON & STEEL CO LTD
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