Method for improving H13 steel rolling, and H13 round steel

A technology for steel grades and rolls, applied in the field of steel grade processing, can solve the problems of difficult pass bite, rolling scrap or return, and rapid cooling of rolled pieces, so as to improve tissue center looseness, reduce rolling scrap or return, and ensure production. The effect of efficiency and production costs

Pending Publication Date: 2021-01-05
BAOSTEEL SPECIAL STEEL SHAOGUAN CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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, resul

Method used

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  • Method for improving H13 steel rolling, and H13 round steel
  • Method for improving H13 steel rolling, and H13 round steel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] Example 1, 20 H13 steel billets were put into a continuous furnace for heating, and then rolled, and the heated H13 steel billets were rolled in 11 passes in the blanking machine, wherein, in the first pass In the first rolling, a small reduction process was adopted, and the reduction H1 was 35 mm, and the cooling water of the roll was turned off for rolling; in the second pass, a large reduction process was adopted, and the reduction H2 was 74 mm; In the third rolling pass, the large reduction process is adopted, and the reduction H3 is 79mm. In the fourth to eleventh passes, the roll cooling water is turned on for rolling, and the roll cooling water flow N is 90m 3 / h, the finished product is finally made, and the success rate of biting the rolled piece is recorded, and the biting success rate of the rolled piece is 100%.

Embodiment 2

[0056] Example 2, 20 H13 steel billets were put into a continuous furnace for heating, and then rolled, and the heated H13 steel billets were rolled in 11 passes in the blanking machine, wherein, in the first pass In the first rolling, a small reduction process was adopted, and the reduction H1 was 40 mm, and the cooling water of the roll was turned off for rolling; in the second rolling pass, a large reduction process was adopted, and the reduction H2 was 75 mm; In the third rolling pass, the large reduction process is adopted, and the reduction H3 is 80mm. In the fourth to eleventh passes, the roll cooling water is turned on for rolling, and the roll cooling water flow N is 95m 3 / h, the finished product is finally made, and the success rate of the biting of the rolled piece is recorded, and the biting success rate of the rolled piece is 95%.

Embodiment 3

[0057] Example 3, 20 H13 steel billets were put into a continuous furnace for heating, and then rolled, and the heated H13 steel billets were rolled in 11 passes in the blanking machine, wherein, in the first pass In the first rolling, a small reduction process was adopted, and the reduction H1 was 45 mm, and the cooling water of the roll was turned off for rolling; in the second pass, a large reduction process was adopted, and the reduction H2 was 76 mm; In the third rolling pass, the large reduction process is adopted, and the reduction H3 is 81mm. In the fourth to eleventh passes, the roll cooling water is turned on for rolling, and the roll cooling water flow N is 100m 3 / h, the finished product is finally made, and the success rate of biting the rolled piece is recorded, and the biting success rate of the rolled piece is 100%.

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PUM

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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...

Claims

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Application Information

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IPC IPC(8): B21B1/00B21J1/06B21B27/06
CPCB21B1/00B21J1/06B21B27/06
Inventor 廖子东周小兵周成宏李学保潘泽林洪少锋廖中意田外员
Owner BAOSTEEL SPECIAL STEEL SHAOGUAN CO LTD
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