Production method of 32Cr3Mo1V continuous casting large round billet for roller shell

Abstract

The invention relates to the technical field of continuous casting large round billet production and specifically discloses a production method of a 32Cr3Mo1V continuous casting large round billet forroller shell. The production method of the 32Cr3Mo1V continuous casting large round billet for roller shell is provided for mainly solving the technical problems that a continuous casting large roundbillet in the prior art has large defects in the center of the large section and cannot be used as a major billet raw material for producing a 32Cr3Mo1V roller shell. The production method of the 32Cr3Mo1V continuous casting large round billet for the roller shell comprises the steps of molten steel smelting, wherein molten iron with the low impurity element content is adopted as the molten steelsmelting, and the impurity elements include less than or equal to 0.002% of Pb, less than or equal to 0.01% As, less than or equal to 0.002% of Sn, less than or equal to 0.003% of Sb and less than orequal to 0.002% of Bi; continuous casting, specifically, conducting protective casting in the whole continuous casting process, conducting constant-drawing-speed production, utilizing a crystallizer,conducting flow casting and end electromagnetic stirring to cooperate with weak secondary cooling water; and conducting heating, forging and pressing, low-temperature furnace charging, heating, upsetting, punching, drawing-out and broaching. The continuous casting large round billet produced through the production method has qualified chemical components. The low-power quality and the center quality of the continuous casting large round billet meet the requirements for forging the roller shell. The 32Cr3Mo1V continuous casting large round billet can be used for producing the 32Cr3Mo1V rollershell instead of steel ingots and has the good development prospects.

Description

technical field [0001] The invention relates to the technical field of continuous casting large round billet production, in particular to a production method of a 32Cr3Mo1V continuous casting large round billet for roll sleeves. Background technique [0002] 32Cr3Mo1V is often used as the main material for roll sleeves in the aluminum strip rolling industry due to its strong thermal fatigue resistance, good thermal conductivity and excellent mechanical properties. [0003] At present, the main raw material for the production of 32Cr3Mo1V roller sleeves is die-cast steel ingots instead of continuous casting large round billets, because the center quality of steel ingots is better than that of continuous casting large round billets, and the steel ingots can be obtained after forging and subsequent heat treatment. Roller sleeve products that meet performance requirements . However, compared with continuous casting large round billets, the yield of die casting steel ingots is l...

AI Technical Summary

Problems solved by technology

[0005] One of the purposes of the present invention is to provide a production method for 32Cr3Mo1V continuous casting large round slabs for roller sleeves, to overcome the technical problem that the continuous casting large round slabs, especially the large section, have relatively large central defects and cannot be used to produce the main raw material of 32Cr3Mo1V roller sleeves. In order to improve the internal quality of the continuous casting billet, the input and output of the continuous casting large round billet can replace the steel ingot forging 32Cr3Mo1V roller sleeve