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A kind of hot-rolled steel plate for 400mpa double-sided enamelling after enamel and its manufacturing method

The technology of a hot-rolled steel sheet and a manufacturing method is applied to the hot-rolled steel sheet for double-sided enamel and the field of manufacture thereof, and can solve the problems such as the inability to meet the requirements of large-scale enamel assembly structure engineering, and achieve the effect of good anti-scale explosion performance.

Active Publication Date: 2020-05-29
ANGANG STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, as the volume of enamel-assembled structural parts continues to increase, higher requirements are put forward for the strength of the steel plate after enamel. The yield strength of the hot-rolled steel plate in the above technical solution still cannot meet the needs of large-scale enamel-assembled structural projects.

Method used

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  • A kind of hot-rolled steel plate for 400mpa double-sided enamelling after enamel and its manufacturing method
  • A kind of hot-rolled steel plate for 400mpa double-sided enamelling after enamel and its manufacturing method
  • A kind of hot-rolled steel plate for 400mpa double-sided enamelling after enamel and its manufacturing method

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Embodiment Construction

[0023] According to the present invention, a hot-rolled steel plate for 400MPa grade double-sided enamel after enamelling, the chemical composition of the hot-rolled steel plate is calculated as:

[0024] C: 0.08%~0.15%; Si≤0.10%; Mn: 1.0%~2.0%; P: 0.060%~0.10%; S≤0.006%; N≤0.008%; Ti: 0.02%~0.08%; %~0.045%; V: 0.020%~0.055%; Nb: 0.01%~0.05%; Mo: 0.15%~0.30%, the balance is Fe and unavoidable impurities;

[0025] The thickness of the hot-rolled steel plate is 3-16 mm; when the thickness of the hot-rolled steel plate is ≥ 8 mm, B is added to the chemical composition, and the added amount is 0.0005%-0.005% by weight;

[0026] The yield strength of the hot-rolled steel plate after enamelling is ≥400MPa.

[0027] A method for manufacturing a hot-rolled steel plate for 400MPa-level double-sided enamelling after enamel, the production process of the hot-rolled steel plate is molten steel desulfurization-converter smelting-outside furnace refining-continuous casting slab heating-rou...

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Abstract

The invention relates to a hot rolled steel plate with the honed yield strength of 400 MPa for counterenamel. The hot rolled steel plate is prepared from, by mass percent, 0.08% to 0.15% of C, not larger than 0.10% of Si, 1.0% to 2.0% of Mn, 0.060% to 0.10% of P, not larger than 0.006% of S, not larger than 0.008% of N, 0.02% to 0.08% of Ti, 0.010% to 0.045% of Als, 0.020% to 0.055% of V, 0.01% to0.05% of Nb, 0.15% to 0.30% of Mo and the balance Fe and inevitable impurities. When the thickness of the hot rolled steel plate is larger than or equal to 8 mm, 0.0005% to 0.005% of B is added. Thehoned yield strength of the hot rolled steel plate is larger than or equal to 400 MPa. The hot rolled steel plate has good scute burst resisting performance, meanwhile, the honed yield strength can reach 400 MPa or above, and the requirement of a large enamel assembling structure can be met better.

Description

technical field [0001] The invention relates to the technical field of production of low-alloy hot-rolled steel sheets, in particular to a hot-rolled steel sheet for double-sided enamelling and a manufacturing method thereof. Background technique [0002] In large-scale water treatment facilities, chemical facilities, environmental protection facilities, and biomass energy projects, the use of enamel assembly structures has obvious advantages such as low investment costs, short construction periods, and long service life of equipment. [0003] The main material of the enamel assembled structure is a hot-rolled steel plate with good double-sided enamel performance. In order to meet the structural design requirements, the thickness of the hot-rolled steel plate is generally 3.0mm to 16mm, and the yield strength level after enamelling is generally above 200MPa. [0004] Although cold-rolled enamel steel sheets can meet the performance requirements of enamel, due to the thickne...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/04C22C38/06C22C38/12C22C38/14C21D8/02
CPCC21D8/0226C22C38/004C22C38/04C22C38/06C22C38/12C22C38/14
Inventor 高磊王华于宁满彦臣关菊刘凤莲刘志伟王洪海杨俊峰栗锐翟永彬
Owner ANGANG STEEL CO LTD
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