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Wide thick titanium alloy plate rolling method

A titanium alloy and wide-width technology, applied in metal rolling, metal rolling, manufacturing tools, etc., can solve the problems of performance deterioration, high resistance to deformation, and coarse material structure, so as to reduce production costs, improve production efficiency, The effect of excellent mechanical properties

Inactive Publication Date: 2015-09-02
BAOJI TITANIUM IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the high yield strength and high deformation resistance of titanium alloys, and as the plate width increases, the deformation resistance increases accordingly. Due to the limitation of plastic deformation of materials, generally increasing the heating temperature during thermal processing will cause the material structure to become coarse and the performance to deteriorate. , a large reduction will cause cracks on the surface of the material, concentration of residual stress inside the material, bending and warping of the plate to varying degrees, and affect the quality of the plate

Method used

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  • Wide thick titanium alloy plate rolling method
  • Wide thick titanium alloy plate rolling method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Step 1: Place the 300×900×1500mm (thickness×width×length) TC4 ELI titanium alloy slab in a heating furnace, and heat it at a temperature of 950°C for 400 minutes;

[0021] Step 2: Send the TC4ELI slab heated by step 1 into a 3300mm rolling mill with a width of 1500mm for rolling. The rolling is divided into 28 passes. The deformation of each pass is 2-8%, and the rolling rate is controlled at 1m / s~10m / s; use an infrared thermometer to monitor the temperature of the TC4ELI titanium alloy slab to ensure that the final rolling temperature is not lower than 800°C, and obtain a finished titanium alloy thick plate with a thickness of 90mm;

[0022] Step 3: Rapidly cool the finished plate described in Step 2 to below 300° C. by using an online water spray cooling method.

[0023] Step 4: Heat the cooled finished plate at a temperature of 920°C for about 2 hours for solution annealing to obtain a finished titanium alloy thick plate. After testing and testing, its performance da...

Embodiment 2

[0025] Step 1: Place the 200×1700×3200mm (thickness×width×length) TC4 ELI titanium alloy slab in a heating furnace, and heat it at 950°C for 280 minutes;

[0026] Step 2: Send the TC4 ELI slab heated by step 1 into a 3300mm rolling mill with a width of 3200mm for rolling. The rolling is divided into 18 passes. The deformation of each pass is 2~8%, and the rolling rate is controlled. At 1m / s~10m / s; use an infrared thermometer to monitor the temperature of the TC4 ELI titanium alloy slab to ensure that the final rolling temperature is not lower than 800°C, and obtain a finished titanium alloy thick plate with a thickness of 90mm;

[0027] Step 3: Rapidly cool the finished plate described in Step 2 to below 300° C. by using an online water spray cooling method.

[0028] Step 4: Heat the cooled finished plate at a temperature of 920°C for about 2 hours for solution annealing to obtain a finished titanium alloy thick plate. After testing and testing, its performance data and micros...

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Abstract

The invention relates to a wide thick titanium alloy plate rolling method. The wide thick titanium alloy plate rolling method comprises the following steps: 1) placing a wide thick titanium alloy plate blank in a heating furnace, controlling heating temperature to be 10-50DEG C below an alpha plus beta / beta phase transformation point and preserving heat for 150-600min; 2) feeding the heated plate blank obtained in step 1 into a rolling mill to perform unidirectional rolling, keeping rolling deformation to be 40-75 percent and keeping final rolling temperature to be no less than 200DEG C below the alpha plus beta / beta phase transformation point to obtain a finished thick titanium alloy plate; 3) cooling the finished plate obtained in step 2 to be below 300DEG C by adopting a quick cooling method; 4) performing solid solution treatment to the finished plate after being quickly cooled, wherein the solid solution treatment temperature is controlled to be within a range of 890-970DEG C and the heat preserving time is controlled to be 1-3h. The wide thick titanium alloy plate rolling method thoroughly solves the realistic problems that the rolling tonnage of the wide thick TC4 ELI titanium alloy plate is high and the deformation resistance is large, realizes the industrial production of the wide titanium alloy plates, reduces the production cost and improves the production efficiency.

Description

technical field [0001] The invention relates to the field of titanium alloy processing, in particular to a method for rolling thick titanium alloy plates with a wide width. Background technique [0002] Due to its low density and high specific strength, titanium alloys are widely used in aviation, aerospace, ships and other fields. Due to the high yield strength and low elastic modulus of titanium alloy, the deformation resistance and high resilience of the sheet metal during processing are increased, and the processing difficulty is increased. [0003] With the increasing application of titanium alloys in the fields of aviation, aerospace, and military industry, the material design requires wider and wider widths and higher requirements for the uniformity of the material structure. At present, the width of the TC4 ELI plate has exceeded 3000mm. Increase, processing deformation resistance increases accordingly, the existing technology is to use wide rolling mill for hot rol...

Claims

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Application Information

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IPC IPC(8): B21B1/38B21B45/02C22F1/18
CPCB21B1/38B21B45/0203B21B2001/386C22F1/183
Inventor 王勤波王俭黄杰王红武王永强
Owner BAOJI TITANIUM IND CO LTD
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