Composite manufacturing method of ultra-thick steel plate

Abstract

The invention relates to a composite manufacturing method of an ultra-thick steel plate, which adopts a method of high-temperature hydrogen reduction and hot rolling for producing an ultra-thick steel plate and belongs to the field of steel rolling in the metallurgical industry. The technical scheme is as follows: the composite manufacturing method sequentially comprises the following process steps: preparing a base material and a covering material; carrying out surface treatment on the base material and the covering material; carrying out welding and combined blanking on the side part of a composite surface; carrying out high-temperature hydrogen reduction; vacuumizing and sealing a composite cavity; heating and rolling; carrying out hot straightening; cooling and inspecting; and collecting and warehousing the finished product. The composite manufacturing method has the following benefits: the ultra-thick steel plate with the thickness of greater than 100mm can be manufactured by the composite manufacturing method, stratification and cracking can be avoided during shearing, drilling and other processing operations, the method overcomes the problems existing in the production of ultra-thick steel plates with the thickness of greater than 100mm in the background art, and the composite manufacturing method has the characteristics of good internal quality of the product, reasonable process steps, high efficiency, low investment, convenient operation process and the like.

Description

technical field [0001] The invention relates to a compound manufacturing method of an extra-thick steel plate, which adopts the method of "high-temperature hydrogen reduction + hot rolling" to produce the extra-thick steel plate, and belongs to the field of steel rolling in the metallurgical industry. Background technique [0002] Extra-thick steel plates usually refer to steel plates with a thickness of more than 100mm, which are mainly used in some large-scale projects or equipment, such as power stations, water conservancy, chemical industry, warships, storage tanks, reservoir gates and other fields. At present, due to the limitations of the production methods of extra-thick steel plates, the production of extra-thick steel plates cannot meet the needs of the market, especially some high-performance extra-thick steel plates, which have high added value. At present, the methods of manufacturing extra-thick steel plates include continuous casting, ingot casting, die-casting...

AI Technical Summary

Problems solved by technology

At present, due to the limitations of the production methods of extra-thick steel plates, the production of extra-thick steel plates cannot meet the needs of the market, especially some high-performance extra-thick steel plates, which have high added value

At present, the methods of manufacturing extra-thick steel plates include continuous casting, ingot casting, die-casting slab, and explosive composite method. It is difficult to guarantee the internal quality of the steel plate; the ingot casting method, the die casting billet method, and the explosive composite method have the disadvantages of long process and low efficiency.

Some people in foreign countries use vacuum composite rolling production technology to complete the entire hot rolling composite process in a closed vacuum chamber. Although the composite panels produced by this technology have superior performance, there are problems such as large investment in new equipment and high difficulty in operation.

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