CN103203357A

CN103203357A - Rolling process of T-shaped steel on transverse three-roller rolling mill

Info

Publication number: CN103203357A
Application number: CN2013100692169A
Authority: CN
Inventors: 李广新; 张文魁; 石学安; 郭海军
Original assignee: ANYANG CHANGXING STEEL ROLLING Co Ltd
Current assignee: ANYANG CHANGXING STEEL ROLLING Co Ltd
Priority date: 2013-03-05
Filing date: 2013-03-05
Publication date: 2013-07-17

Abstract

The invention relates to a rolling process of T-shaped steel on a transverse three-roller rolling mill. Three ordinary transverse three-roller rolling mill sets are contained. The rolling process comprises a first step of blanking square steel blank needing rolling according to the process requirements to form a certain length and size; a second step of enabling the square steel blank to enter a heating furnace, heating to a start rolling temperature range 1,150-1,200 DEG C, and enabling heat insulation time to be 1h; a third step of respectively performing rough rolling, intermediate rolling and precision rolling sequentially through the three ordinary transverse three-roller rolling mill sets, enabling a rolling sequence to be vertical-horizontal-vertical-horizontal from a second ordinary transverse three-roller rolling mill set, enabling a finish rolling temperature to be 900-950 DEG C, and rolling the blank to form the T-shaped steel shape after final finish rolling; a fourth step of performing natural cooling, removing blue oxide skin on the surface of a rolled piece according to material supply or drawing requirements, and performing straightening processing; and a fifth step of enabling the T-shaped steel to undergo blanking and be put in a warehouse according to material supply or drawing dimensional requirements. A hot rolling one-time forming process is adopted, the blank can be rolled into the T-shaped steel through the ordinary transverse three-roller rolling mill sets, strength of a small roller of the rolling mill is guaranteed, and production cost is reduced.

Description

The rolling mill practice of T-steel on the cross-arranging type three-high mill

Technical field

The invention belongs to the hot roll T shaped steel production technical field, particularly relate to the rolling mill practice of a kind of T-steel on the cross-arranging type three-high mill.

Background technology

As everyone knows, T-steel rolling dark at the conventional mill top pass because of it, the little roll strength of milling train can not guarantee, generally is rolled at universal mill, improved the production and processing cost so greatly, the expense of many universal mills of buying is not afforded to do middle-size and small-size steel enterprise.Therefore, study a kind of T-steel structure and rolling mill practice thereof, make that this T-steel structure can be rolling by the conventional mill unit, and make the intensity of rolling mill roll to be guaranteed, just seem very important thereby satisfy medium and small shaped steel enterprise production demand.

Summary of the invention

The technical problem to be solved in the present invention overcomes above-mentioned the deficiencies in the prior art exactly, and provide a kind of conventional mill unit that can pass through rolling, and make the intensity of rolling mill roll be guaranteed, reduce the shaped steel production cost, satisfy the rolling mill practice of T-steel on the cross-arranging type three-high mill of medium and small shaped steel enterprise production demand.

For solving the problems of the technologies described above, technical scheme of the present invention is:

The rolling mill practice of a kind of T-steel on the cross-arranging type three-high mill contains three common cross-arranging type three-high mill units, and described rolling mill practice is undertaken by following technological process:

1), with required rolling square steel blank, become the certain-length size by the technological requirement blanking;

2), blank after baiting enters heating furnace, is heated to the beginning to roll temperature range 1150-1200 ℃, temperature retention time is 1 hour;

3), the blank after heating carries out roughing, middle bundle and finish rolling respectively by three common cross-arranging type three-high mill units successively, and since second conventional mill unit, rolling order is for standing-put down-standing-put down, finishing temperature is 900-950 ℃, rolls out the T-steel shape through last finishing pass;

4) after cooling off, naturally, by supply of material requirement or drawing requirement, remove the blue oxide skin on rolled piece surface, carry out last straightening processing, make each size of shaped steel cross section and tolerance thereof satisfy production requirement;

5), by supply of material sizing requirement or drawing dimensional requirement blanking warehouse-in.

The total passage of described rolling mill practice is the 8-12 road, and wherein roughing passage is the 4-8 road, and middle mill train is 3 roads, and finishing pass is 1 road, and concrete rolling pass is decided according to milling train size and blank size.

The beneficial effect of technical solution of the present invention is:

1, the present invention adopts the hot rolling one-shot forming technique, namely can obtain finished product by operations such as roughing on the cross-arranging type three-high mill, half finish rolling, finish rolling and alignings.This finished product accuracy height, wherein the margin of tolerance of the height of T-steel (H) is ± 1mm, the margin of tolerance of the width of T-steel (B), web thickness (t1) and wing plate thickness (t2) can reach ± 0.5mm, can satisfy manufacturing technique requirent fully.

2, in addition, the present invention adopts the hot rolling one-shot forming technique, adopt special pass schedule, namely since the second rolling mill unit, rolling order employing is stood-is put down-stands-put down, make material base on the conventional mill unit, can roll out T-steel, and can guarantee the intensity of the little roll of milling train to have reduced the T-steel production cost, satisfied medium and small shaped steel enterprise production demand, therefore, be very suitable for promotion and implementation.

Description of drawings

Below in conjunction with accompanying drawing the specific embodiment of the present invention is described in further detail, wherein:

Fig. 1 is the rolling mill practice square steel blank end face front view of T-steel of the present invention on the cross-arranging type three-high mill;

The pass front view of Fig. 2-the 7th, T-steel each rolling pass of rolling mill practice roughing process on the cross-arranging type three-high mill;

The pass front view of each rolling pass of process is rolled in Fig. 8-the 10th, T-steel rolling mill practice half finish rolling on the cross-arranging type three-high mill;

Figure 11 is the pass front view of the rolling mill practice finish rolling process rolling pass of T-steel on the cross-arranging type three-high mill;

Figure 12 is the rolling back of the rolling mill practice of T-steel of the present invention on cross-arranging type three-high mill finished product side view;

Sequence number among the figure: 1, web, 2, wing plate.

The specific embodiment

Embodiment:

Referring to Fig. 1 to Figure 12, the rolling mill practice of T-steel of the present invention on the cross-arranging type three-high mill contains three common cross-arranging type three-high mill units, and described rolling mill practice is undertaken by following technological process:

1), be the square steel blank of the 150*150mm2 of Q345B with material, become the certain-length size by the technological requirement blanking, as: length dimension is 1.5m;

2), blank after baiting enters heating furnace, be heated to the beginning to roll temperature range 1150-1200 ℃, as: 1200 ℃ of temperature, temperature retention time are 1 hour, after begin rolling;

3), the blank after heating carries out roughing, middle bundle and finish rolling respectively by three common cross-arranging type three-high mill units successively, wherein one, two are 400 milling train units, three is 350 milling train units, and since second conventional mill unit, rolling order is for standing-put down-standing-put down, finishing temperature is 900-950 ℃, as: 950 ℃ of temperature, the total passage of described rolling mill practice is 10 roads, wherein roughing passage is 6 roads, middle mill train is 3 roads, and finishing pass is 1 road, rolls out the T-steel shape through last finishing pass;

Referring to Figure 12, the present invention adopts the hot rolling one-shot forming technique, the finished product T-steel structure that obtains by operations such as roughing, middle bundle, finish rolling and alignings, comprise web 1 and wing plate 2, the width B of described T-steel is 2-3 times of web thickness t1, the height of T-steel is 3-4 times of wing plate thickness t 2, and described web and wing plate seamed edge rounding radius R are 3mm.This finished product machining accuracy height, wherein the margin of tolerance of the height of T-steel (H) is ± 1mm, the margin of tolerance of the width of T-steel (B), web thickness (t1) and wing plate thickness (t2) can reach ± 0.5mm, can satisfy manufacturing technique requirent fully.

The present invention can make material base can roll out T-steel on the conventional mill unit, and can guarantee the intensity of the little roll of milling train, has reduced the T-steel production cost, has satisfied medium and small shaped steel enterprise production demand fully, is suitable for promotion and implementation.

Claims

1. the rolling mill practice of a T-steel on the cross-arranging type three-high mill contains three common cross-arranging type three-high mill units, and it is characterized in that: described rolling mill practice is undertaken by following technological process:

2. the rolling mill practice of T-steel according to claim 1 on the cross-arranging type three-high mill, it is characterized in that: the total passage of described rolling mill practice is the 8-12 road, and wherein roughing passage is the 4-8 road, and middle mill train is 3 roads, and finishing pass is 1 road.