Process for rolling 170 mm specification of flaw detection satisfying steel plate with 300 mm section

A technology for steel plates and specifications, applied in the production process of 300mm cross-section rolling 170mm specification inspection steel plates, can solve the problems of high cost, low efficiency, fierce market competition, etc., and achieve higher yield, lower cost per ton of steel, and lower production costs. Effect

Inactive Publication Date: 2013-04-03
NANYANG HANYE SPECIAL STEEL CO LTD
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Problems solved by technology

However, when rolling steel plates with specifications above 150mm, domestic manufacturers with extra-thick slab continuous casting

Method used

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Embodiment Construction

[0007] The invention adopts continuous casting slabs to produce ultra-thick 170mm specification guaranteed flaw detection steel plates. The thickness of the casting slabs is 300mm, and the components of the produced steel grades are controlled according to the national standard components. The production process is molten iron desulfurization→converter→argon station→LF refining→continuous casting →Stack cooling→slab cleaning→slab heating→rolling→stack cooling→destacking and finishing→flaw detection→storage control; molten iron is smelted by converter and LF refining after desulfurization to improve the purity of molten steel, and then the molten steel is hoisted Transport to continuous casting for pouring; during continuous casting, the superheat of molten steel in the tundish is strictly controlled at 10-25°C, the casting speed of continuous casting is controlled at 0.8m / min, and the secondary cooling adopts a strong cooling water meter of 0.61L / Kg, Continuous casting adopts l...

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Abstract

The invention discloses a production process for rolling a 170 mm specification of flaw detection satisfying steel plate with a 300 mm section. The process is mainly characterized by comprising the following steps of molten iron desulphurization, furnace converting, argon station, LF refining, continuous casting, cooling in heap, casting blank cleaning, casting blank heating, rolling, cooling in heap, destacking finishing, flaw detection and storage control. The process can overcome the defects in the mould ingot casting production adopted for producing the 170 mm extremely-thick flaw detection satisfying steel plate, has the characteristics of low cost, short flow, high efficiency and low energy consumption, and is matched with the reasonable process route, the reasonable parameters and drawing speed under light pressure, the reasonable casting blank heating time and rolling reduction, the reasonable casting blank cooling in heap and steel plate cooling in heap time, thus, the 170 mm specification of flaw detection satisfying steel plate produced by adopting the 300 mm section meets the level 1 standard of national phi 5 flaw detection, the purpose of cost reduction is realized, and the market competitiveness is improved.

Description

technical field [0001] The invention belongs to the technical field of steel plate production, and relates to the production of thin-section continuous casting slabs instead of die-casting ingots to produce extra-thick flaw-proof steel plates, in particular to a production process for rolling 170mm flaw-proof steel plates with a 300mm cross-section. Background technique [0002] At present, die-cast ingots are generally used in the production of ultra-thick flaw-proof steel plates with specifications above 120mm in China, and the ultra-thick flaw-proof steel plates are produced by using die-cast ingots with large thickness and large compression ratio. However, die-cast ingots are used for production, with long steelmaking and steel rolling production cycles, complex processes, high process energy consumption, low yield of rolled steel plates, and high production costs per ton of steel, which is not conducive to market competition in the current low-profit steel industry . I...

Claims

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Application Information

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IPC IPC(8): B22D11/16B22D11/18B22D11/22
Inventor 朱书成许少普赵迪崔冠军康文举乔华伟刘丹王新张少辉
Owner NANYANG HANYE SPECIAL STEEL CO LTD
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