Steel for automobile beam and with yield strength more than 500 MPa and manufacturing method thereof
A technology of automobile frame and yield strength, applied in the field of hot-rolled steel sheet, can solve problems such as poor formability
Inactive Publication Date: 2010-06-09
SHANGHAI MEISHAN IRON & STEEL CO LTD
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Problems solved by technology
It mainly solves the technical problem of poor formability of existing high-strength hot-rolled steel plates with a yield strength above 500Mpa
Method used
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[0042] Specific embodiments: the chemical composition of specific embodiments 1-3 is shown in Table 2, and the product performance is shown in Table 3:
[0043] Table 2B590L chemical composition (Wt%)
[0044] serial number
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The invention relates to a hot rolled steel plate with high strength and mouldability, i.e. steel for an automobile beam and the like, in particular to a hot rolled steel plate with yield strength more than 500 MPa and high strength and a manufacturing method thereof, mainly solving the technical problem of poor mouldability of the hot rolled steel plate with the yield strength more than 500 MPa and the high strength. The steel with the yield strength more than 500 MPa for the automobile beam is characterized by comprising the following chemical components in percentage by weight: 0.065-0.095% of C, less than 0.15% of Si, 1.51-1.65% of Mn, less than 0.020% of P, less than 0.008% of S, 0.051-0.060% of Nb, 0.051-0.065% of V, 0.015-0.025% of Ti, 0.02-0.050% of Alt, and the balance of Fe and inevitable impurities. The invention is mainly used for the steel for automobile beams.
Description
Technical field: [0001] The present invention relates to a high-strength, high-formability hot-rolled steel plate such as steel for automobile beams, especially a high-strength hot-rolled steel plate with a yield strength of 500 MPa or more and a manufacturing method thereof. Background technique: [0002] With the rapid development of the domestic heavy-duty automobile industry, automobile manufacturers have higher and higher requirements on the performance and quality of steel for making automobile structural parts. The steel used for automobile beams currently used has a yield strength of 355Mpa and a tensile strength of 510Mpa. level. If the new steel type B590L with a yield strength of 500Mpa and above and a tensile strength of 550Mpa to 700Mpa is used, the thickness of the steel plate can be reduced while the load capacity remains unchanged or even increased, which can reduce the vehicle's self-weight, save energy and reduce consumption. The theme of social energy sav...
Claims
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Login to View More IPC IPC(8): C22C38/14B23P17/00C21C5/28C21C7/10B22D11/16B21B1/26B21B37/74B21B37/16B21C47/02
Inventor 殷胜万兰凤唐洪乐卞皓邵广丰
Owner SHANGHAI MEISHAN IRON & STEEL CO LTD