High-strength hot rolling automotive frame steel plate and manufacturing method thereof

A technology for automobile girders and manufacturing methods, which is applied in the field of steel materials and hot-rolled steel products, can solve problems affecting the cold forming performance of steel, and achieve the effects of high fatigue strength, lightening the weight of automobiles, and easy production
CN101565794AInactive Publication Date: 2009-10-28BAOSHAN IRON & STEEL CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
BAOSHAN IRON & STEEL CO LTD
Publication Date
2009-10-28
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention provides a high-strength hot rolling automotive frame steel plate which comprises the following chemical components according to the weight percent: 0.05 to 0.10 of C, less than or equal to 0.10 of Si, 1.1 to 1.85 of Mn, less than or equal to 0.025 of P, less than or equal to 0.0030 of S, 0.015 to 0.060 of Al, less than or equal to 0.0060 of N, 0.015 to 0.050 of Nb, 0.015 to 0.150 of Ti, less than or equal to 0.0050 of Ca and the balance of Fe and inevitable impurities. The invention also provides a manufacturing method of a steel plate, comprising rolling control and cold control processes. By adopting the chemical components and reasonable production process, the yield strength of the hot rolling automotive frame steel plate can reach the grade of 550-700Mpa; and the hot rolling automotive frame steel plate has excellent cold forming performance and higher fatigue strength and is suitable for manufacturing longitudinal beams and cross beams of an automotive frame and other members.
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Description

technical field

[0001] The present invention relates to iron and steel materials, specifically, the present invention relates to hot-rolled steel products, and more specifically, the present invention relates to a high-strength hot-rolled steel plate for automobile frame. Background technique

[0002] The car frame is generally composed of longitudinal beams and beams, and is supported on the wheels via suspension devices, front axles, and rear axles. It must have sufficient strength and rigidity to withstand the load of the car and the impact from the wheels. Longitudinal beams and beams are generally processed by stamping or roll forming. As the strength of the steel plate increases, the stamping force of the stamping machine needs to increase, and the springback after stamping will also increase. Therefore, high-strength beams are generally formed by roll forming. .

[0003] Since the frame of the car is generally formed by cold working, and the longitudinal beam and the...

Claims

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