Method for improving H13 steel rolling, and H13 round steel

Abstract

The invention discloses a method for improving H13 steel rolling, and H13 round steel. The method comprises the steps of heating: specifically, heating an H13 steel billet in a continuous furnace; rolling: specifically, performing multi-pass rolling for the heated H13 steel billet in a cogging mill, wherein a low pressing process is adopted in the first-pass rolling; stopping roller cooling waterfor rolling, and obtaining an H13 intermediate billet; and forming: specifically rolling and forming the H13 intermediate billet rolled by the cogging mill in a continuous rolling mill. According to the method, through improvement of a first pass, a second pass and a third pass, in the first rolling pass, the low pressing process is adopted for rolling, and the pressing amount is reduced, so thatthe press-in angle of a rolled piece in the rolling process is small, thereby facilitating press-in; meanwhile, in the second rolling pass and the third rolling pass, a high pressing process is adopted for rolling, not only are the advantages of the high pressing process reserved, and the structure center porosity of a finished product is improved, but also reduction or remelting of rolled wastesis reduced; and the production efficiency and the production cost are ensured.

Description

technical field [0001] The invention belongs to the technical field of steel processing, and more specifically relates to a method for improving the rolling of H13 steel and H13 round steel. Background technique [0002] H13 steel has a high alloy composition—up to 10.48%, of which Cr content is 5.5%. It has the characteristics of high hardness, fast temperature drop, and large deformation resistance during rolling. [0003] In order to improve the porosity of the product organization center, the steel blanking machine adopts a large reduction process, and uses roll cooling water to cooperate with rolling. The current preparation method of this steel type has the following disadvantages: due to the use of a large reduction process and rolling with roll cooling water, the rolled piece is cooled quickly, especially the temperature at the head and tail is low, resulting in an increase in deformation resistance, which in turn leads to subsequent It is difficult to bite into the...

AI Technical Summary

Problems solved by technology

The current preparation method of this steel type has the following disadvantages: due to the large reduction process and rolling with roll cooling water, the rolled piece is cooled quickly, especially the temperature at the head and tail is low, resulting in an increase in deformation resistance, which in turn leads to subsequent It is difficult to bite into the pass, which often results in scrapping or returning to the furnace, which seriously affects the production efficiency and production cost

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