Technological process for producing super-thick plate

Abstract

The invention relates to a process for producing an ultra-thick plate and belongs to the field of rolling and producing an ultra-thick steel plate in the metallurgical industry. The invention mainly overcome the defect of producing the ultra-thick steel plate by a traditional model casting manufacturing blank and an electro-slag remelting manufacturing blank. The method comprises the following steps: cutting and fixing lengths of the blanks, mechanically conditioning the blanks (eliminating, leveling and cleaning a single-surface oxide layer of a casting blank with a milling machine, a planer or a shot blast); clamping an assembly (relatively superposing the cleaning surfaces of the two blanks after processing, placing the two blanks oppositely and clamping the blanks); mounting the blanks in a vacuum chamber of an electronic beam welding machine for purpose of vacuuming; sewing the assembly on the electronic beam welding seal edge, heating the assembly in a furnace and rolling the assembly through temperature control; and then producing the ultra-thick steel plate. Compared with the traditional electro-slag remelting production process, the process has the advantages of high production efficiency, reduced electric power consumption, less investment of production devices and low production cost. Compared with the traditional die casting production process, the process solves the problem of segregation and looseness of a large-scale die casting ingot center part; the finished product ratio is high; and the finished product ratio of blank assembly is over 90 %.

Description

Technical field:

[0001] The invention belongs to the field of rolling and producing extra-thick steel plates in the metallurgical industry, in particular to a process method that can efficiently and conveniently produce extra-thick steel plates by using the billet produced by the current continuous casting process. Background technique:

[0002] In the production of steel plates, steel plates with a thickness of more than 80mm are usually called extra-thick plates. Extra-thick steel plates are used in heavy machinery manufacturing, pressure vessels, boiler manufacturing, military industry, offshore drilling platforms, nuclear power plants, mold manufacturing, bridges, airports, All aspects of national economic construction such as transportation are mainly high-tech and high value-added products, which have great market demand and broad application prospects.

[0003] In the production of steel plates, in order to meet the quality requirements such as the strength of the pla...