Preparation method of TC4 wide and thick plate with excellent comprehensive performance

A comprehensive performance, wide and thick plate technology, applied in the field of C4 wide and thick plate preparation, can solve the problems of outstanding anisotropy of product performance, large gap between transverse and longitudinal deformation, etc., and achieve excellent comprehensive performance and reduce anisotropy.

Active Publication Date: 2019-01-25
CHENGDU ADVANCED METAL MATERIALS IND TECH RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem solved by the invention is that there is a large gap between the transverse and

Method used

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Experimental program
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preparation example Construction

[0023] The present invention provides the preparation method of TC4 wide and thick plate, comprises the steps:

[0024] a. Heat the TC4 billet, keep warm for 60-90 minutes in the preheating section <800°C, keep warm for 60-90 minutes at 850-900°C in the heating section, and keep warm for 60-90 minutes at 900-950°C in the soaking section;

[0025] b. Transfer the TC4 billet obtained in step a to the rolling mill for the first rolling. The first rolling adopts the combination of horizontal rolling and longitudinal rolling to obtain an intermediate billet. The lateral deformation of the billet is controlled by 40% to 50%, and the longitudinal deformation Amount of 10% to 20%;

[0026] c. Carry out surface grinding treatment on the intermediate billet, remove surface cracks, and carry out center cutting along the longitudinal direction;

[0027] d. Keep the TC4 billet obtained in step c at 950-980°C for 90-120 minutes, and then transfer it to the rolling mill for the second rolli...

Embodiment 1

[0041] The preparation method of present embodiment TC4 wide and thick plate is as follows:

[0042] a. The size of the forged TC4 slab is: thickness 192mm×width 1255mm×length 2230mm; the above-mentioned billet is heated by a walking heating furnace. Section 850 heat preservation for 60 minutes, soaking section 950 ° C heat preservation for 90 minutes;

[0043] b. Turn off the cooling water and phosphorus removal water of the roller table, and quickly transfer the billet to the 4300mm rolling mill for the first rolling. The blank size: thickness 80mm×width 2500mm×length 2687mm;

[0044] c. Carry out surface grinding treatment on the intermediate billet obtained from the first rolling, remove surface cracks, and carry out center cutting along the rolling direction to obtain the billet size: thickness 80mm×width 1250mm×length 2687mm;

[0045] d. Heating the center-cut billet at a heating temperature of 980°C and holding it for 120 minutes, and using a 4300mm rolling mill for t...

Embodiment 2

[0049] The preparation method of present embodiment TC4 wide and thick plate is as follows:

[0050] a. The size of the forged TC4 slab is: thickness 198mm×width 1400mm×length 2350mm, and the above-mentioned slab is heated by a walking heating furnace. Section 850 heat preservation for 60 minutes, soaking section 950 ° C heat preservation for 90 minutes;

[0051] b. Turn off the cooling water and phosphorus removal water of the roller table, and quickly transfer the billet to the 4300mm rolling mill for the first rolling. The blank size: thickness 80mm × width 2800mm × length 2908mm;

[0052] c. Carry out surface grinding treatment on the intermediate billet obtained from the first rolling, remove surface cracks, and carry out center cutting along the rolling direction to obtain the billet size: thickness 80mm×width 1400mm×length 2908mm;

[0053] d. Heating the center-cut billet at a heating temperature of 975°C and holding it for 120 minutes, and using a 4300mm rolling mill...

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Abstract

The invention relates to a preparation method of a TC4 wide and thick plate with excellent comprehensive performance, and belongs to the technical field of hot working forming of titanium alloy. The technical problem to be solved is that the lateral and longitudinal deformation amount is large in the rolling process, and the product performance anisotropy is prominent. The preparation method of the TC4 wide and thick plate includes heating a TC4 blank by using a walking beam furnace; adopting the mode of lateral rolling combined with longitudinal rolling for first rolling to obtain an intermediate blank; middle shearing the intermediate blank, heating and warming the blank and then conducting second rolling in the mode of the lateral rolling combined with the longitudinal rolling; finallyconducting annealing straightening heat treatment to obtain a TC4 wide and thick plate product. According to the preparation method, the total lateral and longitudinal deformation of the blank can beclose to minimize the performance anisotropy to the greatest extent and obtain a wide TC4 plate product with uniform equi-axial structure cross-section and the comprehensive performance.

Description

technical field [0001] The invention belongs to the technical field of thermal processing and forming of titanium alloys, and in particular relates to a preparation method of TC4 wide and thick plates with excellent comprehensive performance. Background technique [0002] TC4 is a medium-strength α+β two-phase titanium alloy, and the transformation temperature between α+β is about 980°C. TC4 has excellent comprehensive performance and is widely used in the aerospace industry. Its long-term working temperature can reach 400°C. In the aviation industry, it is mainly used to manufacture engine fans, compressor discs and blades, as well as important load-bearing components such as beams, joints and bulkheads in aircraft structures. The mechanical properties of TC4 alloy are related to the quantity and shape of the primary α phase, and are also closely related to the processing conditions during the forming process of the material. The microstructure evolution during forming wil...

Claims

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Application Information

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IPC IPC(8): C22F1/18
CPCC22F1/183
Inventor 杨柳王莹江健
Owner CHENGDU ADVANCED METAL MATERIALS IND TECH RES INST CO LTD
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