Hot-rolled thin-specification anti-seismic refractory steel plate with yield strength of 460 MPa and preparation method

A technology with yield strength and thin gauge, applied in the field of thin gauge anti-seismic fire-resistant steel plate with yield strength of 460MPa and its preparation, can solve the problems of difficulty in guaranteeing high-temperature performance, high cost of Mo element, and difficulty in producing thin-gauge anti-seismic fire-resistant steel. Reduce the difficulty of manufacturing, improve the performance pass rate, and the effect of good room temperature strength
CN112692074AInactive Publication Date: 2021-04-23NANJING IRON & STEEL CO LTD
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Applications(China)
Current Assignee / Owner
NANJING IRON & STEEL CO LTD
Publication Date
2021-04-23
Estimated Expiration
Not applicable Β· inactive patent

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Abstract

The invention discloses a hot-rolled thin-specification anti-seismic refractory steel plate with the yield strength of 460 MPa. The steel plate comprises the following raw materials in percentage by mass: 0.03-0.09% of C, 0.10-0.40% of Si, 0.80-1.2% of Mn, less than or equal to 0.015% of P, less than or equal to 0.01% of S, 0.40-0.80% of Cr, 0.15-0.25% of Mo, 0.08-0.12% of Nb, 0.02-0.06% of V, 0.006-0.03% of Ti, 0.01-0.05% of Al, less than or equal to 0.0050% of N and the balance of Fe and inevitable impurity elements. The structure composition of the refractory steel is controlled, the production cost is reduced, the prepared thin-specification refractory steel plate has good room-temperature strength, high elongation, excellent subzero 40 DEG C low-temperature impact toughness and excellent 600 DEG C high-temperature tensile property, the production and manufacturing difficulty of the thin-specification anti-seismic refractory steel is reduced, and the performance qualification rate is increased.
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Description

technical field

[0001] The invention relates to a steel plate and its preparation, in particular to a thin-spec seismic-resistant fire-resistant steel plate with a yield strength of 460 MPa and a preparation method. Background technique

[0002] At present, the refractory steel plates developed at home and abroad are mainly designed by the composition of high Mo, and mainly use the strong high temperature solid solution strengthening effect of Mo to ensure the high temperature strength below 600 ℃, usually adding not less than 0.5wt.% Mo and Nb, V, Ti microalloying. In order to reduce the cost, the Mo content will decrease, but it is still about 0.3%. For example, Chinese patent 202010053131.1 discloses a seismic-resistant refractory steel and its preparation method, in which 0.51-0.60% Mo is added, and a two-stage controlled rolling process is adopted. Production; Chinese Patent 201910002022.4 discloses a kind of high-strength building structure anti-seismic refractory ste...

Claims

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