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Two-roller reversible mill roller device and technology using continuous casting round billets for carrying out rolling production

A technology of continuous casting round billet and roll device, which is applied in the direction of rolls, metal rolling, manufacturing tools, etc., can solve the problems of less than 40% yield, limited billet size, low production efficiency, etc., and achieves good product quality and performance. , The effect of high dimensional accuracy of products and high dimensional accuracy of finished products

Active Publication Date: 2014-05-21
HUATIAN ENG & TECH CORP MCC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Two-roll reversible rolling mills generally use steel ingots and continuous casting billets to produce large-size square and round steel. The production of steel ingots has problems such as low production efficiency, large quality differences, high energy consumption and high production costs. Due to the limitation of the continuous casting radius of the continuous casting machine, billets The size is limited, the compression ratio cannot meet the requirements, and corner cracks and component segregation are prone to occur due to uneven cooling during the production process
[0003] However, after the large-scale continuous casting round billet is rolled, the cross-sectional shape of the rolled piece is in the shape of a "drum" (such as figure 1 As shown), the end area of ​​the rolled piece is wider than the middle part, showing a "shovel" shape. After turning over the steel, rolling on the two-roll reversing rolling mill is prone to falling off the square or even falling off the steel and rolling waste, which greatly affects the yield. Due to the problem of pass design in some steel mills, the yield is less than 40%.
However, in order to prevent the rolling parts from falling out and falling steel, the current pass design generally adopts the method of reducing the amount of reduction in the pass, and this leads to insufficient deformation of the coarse as-cast structure, which affects the grain size of the product. and organizational structure, ultimately making the quality of the product unable to be guaranteed

Method used

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  • Two-roller reversible mill roller device and technology using continuous casting round billets for carrying out rolling production
  • Two-roller reversible mill roller device and technology using continuous casting round billets for carrying out rolling production
  • Two-roller reversible mill roller device and technology using continuous casting round billets for carrying out rolling production

Examples

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Effect test

Embodiment 1

[0033] Such as figure 2 As shown, this embodiment describes the pass design and rolling process for producing 200X200 and 150X150 square steel using Φ380mm continuous casting round billet. The complete process is: billet-heating-high-pressure water dephosphorization-transition pass 1 Rolling-Two-roll reversible rolling mill Front turning steel hook turning steel-Supporting pass 2 Rolling-Two-roll reversing rolling mill Front turning steel hook turning steel-Front pass of finished product 3 Rolling-Two-roll reversing mill Front turning steel hook turning steel - Finished pass 4 rolling - cut to length - cooling - finishing - storage. The material of the billet in this embodiment is 42CrMo, the diameter of the roll used is 1150mm, the length of the roll body is 2600mm, the speed of the roll is 0-50 / 120rpm, and the rolling temperature of the billet is 1150°C. Each pass on the roll is arranged with 7 slots according to the length of the roll body, two 200X200 and 150X150 finishe...

Embodiment 2

[0050] Such as image 3 As shown, this embodiment describes the pass design and rolling process for producing 270X270 and 220X220 square steel by using Φ500mm continuous casting round billet. The complete process is: billet-heating-high-pressure water dephosphorization-transition pass 21 Rolling-Two-roll reversible rolling mill Front turning hook turning steel-Support pass 22 Rolling-Two-roll reversing mill Front turning steel hook turning steel-Transition pass 1 Rolling-Two-roll reversing mill Front turning steel hook turning steel- Finished pass 4 rolling - cut to length - cooling - finishing - storage. The material of the billet in this embodiment is 40Cr, the diameter of the roll used is 1150 mm, the length of the roll body is 2600 mm, the speed of the roll is 0-50 / 120 rpm, and the rolling temperature of the billet is 1150°C. According to the length of the roll body, 6 slots are arranged on the roll, two 270X270 and 220X220 square steel finished slots, and the 270X270 fin...

Embodiment 3

[0065] Such as Figure 4 As shown, this embodiment describes the pass design and rolling process for producing 320X320 and 270X270 square steel by using Φ600mm continuous casting round billet. The complete process is: billet-heating-high-pressure water dephosphorization-transition pass 1 Rolling-Two-roll reversible rolling mill Front turning steel hook turning steel-Supporting pass 2 Rolling-Two-roll reversing rolling mill Front turning steel hook turning steel-Front pass of finished product 3 Rolling-Two-roll reversing mill Front turning steel hook turning steel - Finished pass 4 rolling - cut to length - cooling - finishing - storage. The material of the billet in this embodiment is 40Cr, the diameter of the roll used is 1150 mm, the length of the roll body is 2600 mm, the speed of the roll is 0-50 / 120 rpm, and the rolling temperature of the billet is 1150°C. According to the length of the roll body, there are 5 hole slots arranged on the roll, two 320X320 finished slots, a...

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Abstract

The invention discloses a two-roller reversible mill roller device and technology using continuous casting round billets for carrying out rolling production. Four types of hole patterns including a transition hole pattern, a supporting hole pattern, a before-finished-product hole pattern and a finished product hole pattern are designed on a pair of rollers. The rolling technology comprises the steps of using the transition hole pattern (1) for rolling the continuous casting round billets, and turning over steel after rolling is accomplished, wherein the rolling reduction ranges from 40 mm to 90 mm per pass; using the supporting hole pattern for continuously rolling the drum-shaped rolled pieces obtained in the previous step to obtain rectangular or square rolled pieces which have regular shapes, and turning over the steel after rolling is accomplished, wherein the rolling reduction ranges from 40 mm 90 mm per pass; using the before-finished-product hole pattern (3) for rolling the rolled pieces to obtain rectangular or oval rolled pieces with reserved rolling reduction and reserved broadening quantity, and turning over the steel billets after rolling is accomplished, wherein the rolling reduction ranges from 20 mm to 90 mm per pass; using the finished product hole pattern for rolling one pass to obtain rolled pieces which are high in dimensional accuracy and product quality, wherein the rolling reduction of square or rectangular steel finished products ranges from 40 mm to 60 mm per pass, and the nominal rolling reduction of round steel ranges from 10 mm to 40 mm per pass.

Description

technical field [0001] The invention relates to the technical field of steel rolling process, in particular to a roll device and process produced by rolling a continuous casting round billet in a two-roll reversing rolling mill. Background technique [0002] Two-roll reversible rolling mills generally use steel ingots and continuous casting billets to produce large-size square and round steel. The production of steel ingots has problems such as low production efficiency, large quality differences, high energy consumption and high production costs. Due to the limitation of the continuous casting radius of the continuous casting machine, billets The size is limited, the compression ratio cannot meet the requirements, and corner cracks and component segregation are prone to occur due to uneven cooling during the production process. The above-mentioned problems can be solved by rolling large-section continuous casting round billets. Therefore, large-scale square and round steel ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21B27/02B21B1/00
Inventor 陈志强卢勇张景旺徐勇朱庆年芦强夏兴进潘帆
Owner HUATIAN ENG & TECH CORP MCC
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