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

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...

AI Technical Summary

Problems solved by technology

However, when rolling steel plates with specifications above 150mm, domestic manufacturers with extra-thick slab continuous casting machines still rely on die-cast ingots for production. The market competition is fierce, the cost is high, and the benefit is low.