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Controlled rolling method for titanium and titanium alloy thin plate camber

A technology for controlling rolling and titanium alloys, applied in the direction of contour control, rolling force/roll gap control, etc., which can solve the problems of difficult camber control and reverse camber, so as to prevent and control camber, simple and convenient operation, and easy The effect of control

Inactive Publication Date: 2012-08-15
WESTERN TITANIUM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the actual operation process, especially titanium and titanium alloys, when the sickle curve is found to be adjusted and corrected in time, it will often cause reverse bending or "S-shaped" due to excessive correction with a small adjustment amount, so timely and effective control of the sickle curve extremely difficult

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The method for controlling camber bending of rolled titanium and titanium alloy thin plates specifically comprises the following steps:

[0023] 1) First heat the heating furnace to 700°C, push the TA1 titanium slab (30×1500×2100mm) into the heating furnace for 40 minutes, heat it until the slab is heated to 700°C, and roll it out of the furnace ;

[0024] 2) The first 4 passes of rolling are carried out with rapid temperature rolling, the thickness is rolled from 30mm to 12mm, the total reduction rate of the slab thickness is 60%, and the temperature of the slab drops to 630°C after the rolling is completed; Place it in the air and wait for 1-2 minutes. After the temperature of the plate drops below 500°C, start rolling with a small reduction. After 8 passes of reduction, the thickness of the sheet is rolled to 6mm, and the average pass reduction is 0.75 mm.

[0025] During the rolling process, if the thin slab is slightly bent toward the operating side, the next pas...

Embodiment 2

[0027] 1) First heat the heating furnace to 700°C, push the TA1 titanium slab (25×1800×2000mm) into the heating furnace for 35 minutes after the second fire, heat the slab to 730°C, and roll it out of the furnace ;

[0028] 2) The first 6 passes of rolling are carried out with rapid temperature rolling, the thickness is rolled from 25mm to 10mm, the total reduction rate of the slab thickness is 60%, and the temperature of the slab drops to 600°C after the rolling is completed; Place it in the air and wait for 1-2 minutes. After the temperature of the plate drops below 500°C, start rolling with a small reduction. After 7 passes of reduction, the thickness of the plate is rolled to 5mm, and the average pass reduction is 0.7 mm.

[0029] During the rolling process, if the thin slab bends toward the driving side, the next pass will press down 0.02mm more on the driving side to correct the camber. The extra reduction is 0.01mm; the total unilateral reduction is not more than 0.1m...

Embodiment 3

[0031] 1) First heat the heating furnace to 720°C, push the TA2 titanium slab (20×2100×2300mm) into the heating furnace for 25 minutes, heat until the slab is thoroughly heated, and roll out of the furnace;

[0032] 2) The first 5 passes of rolling are carried out with warm rolling, the thickness is rolled from 20mm to 10mm, the total reduction rate of the slab thickness is 50%, and the temperature of the slab drops to 620°C after the rolling is completed; Place it in the air and wait for 2-3 minutes. After the temperature of the plate drops below 500°C, start rolling with a small reduction. After 8 passes, the thickness of the plate is rolled to 5mm, and the average pass reduction is 0.6 mm.

[0033] During the rolling process, if the thin slab bends toward the transmission side, the next pass will press down 0.04mm more on the transmission side to correct the camber. The extra reduction is 0.01mm; the total unilateral reduction is not more than 0.1mm.

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PUM

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Abstract

The invention discloses a titanium and titanium alloy thin plate camber controlled rolling method. The method comprises the following steps of: heating a titanium or titanium alloy plate blank in a heating furnace, taking out the plate blank for rolling after the plate blank is heated thoroughly; carrying out rob temperature rolling on front 4-6 tracks before the rolling is carried out, ensuring that the total down rate is more than 40%, then placing the plate blank in the air for 1-3 minutes while the temperature is held until the temperature of a pure titanium plate blank is reduced to the temperature below 500 DEG C, and then carrying out rolling on seventh and eighth tracks after the temperature of the titanium alloy plat blank is reduced to the temperature below 650 DEG C. In the invention, the rolling temperature is reduced by 40-60 DEG C by virtue of finished product heating number, and the rob temperature rolling of the front tracks and light reduction warm rolling after temperature holding are combined, thus a camber produced by the titanium and titanium alloy thin plate in a hot rolling process can be effectively prevented. Besides, when the camber is produced, the camber can be timely corrected online, the control is easy, and the operation is simple and convenient, thus the method disclosed by the invention can effectively prevent and control the camber of a super long titanium or titanium alloy thin plate.

Description

technical field [0001] The invention belongs to the technical field of rolling titanium and titanium alloy thin plates, and in particular relates to a method for controlling the camber of rolling titanium and titanium alloy thin plates. Background technique [0002] When hot-rolled titanium and titanium alloy thin plates are used, the phenomenon that the plate is bent horizontally along the length direction to one side is often called sickle bend. Especially when rolling ultra-long, ultra-thin titanium and titanium alloys, the sickle bend is more serious. This not only greatly reduces the finished product rate and cut-to-length rate, but what is more serious is that the sickle bend is easy to cause scrapping of the frame, resulting in accidents. Therefore, it is very important to effectively control the camber of thin sheet metal in production. [0003] The root cause of the camber in rolling ultra-long and thin plates is that the reductions on both sides of the rolled pie...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21B37/28B21B37/44B21B37/58
Inventor 党鹏付文洁周玉川杨利徐志辉梁栋刘相鹏杨淋栋林涛吕利强李辉马宏旺张清
Owner WESTERN TITANIUM TECH