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A Method for Improving the Microstructure Uniformity of Titanium Alloy Large-size Rods

A technology with uniform structure and titanium alloy, which is applied in the field of forging processing of titanium alloy rods, can solve the problems of many times of firing, very high requirements for structure uniformity, and long process, so as to achieve less number of fires, meet quality requirements, and uniform structure good sex effect

Inactive Publication Date: 2016-08-17
宁夏中色金航钛业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the ubiquitous problem of titanium alloy large-size bars is how to control the structure uniformity and consistency of the bars conveniently, efficiently and stably, especially the TC4 large-size bars used in aerospace structural parts have very high requirements for structure uniformity , which is the technical core and technical difficulties of forging
However, this process requires many fires and a long process. Generally, β treatment needs to be heated once, and forging square→hexagon→rectangular cross section needs 1~2 fires. The intermediate blank is pickled, machined, polished and repaired. Injury, reheating, rounding and shaping to the finished product size requires forging 1 fire, that is, 3 to 4 fires are required to complete the entire process

Method used

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  • A Method for Improving the Microstructure Uniformity of Titanium Alloy Large-size Rods
  • A Method for Improving the Microstructure Uniformity of Titanium Alloy Large-size Rods
  • A Method for Improving the Microstructure Uniformity of Titanium Alloy Large-size Rods

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Embodiment 1

[0035] This embodiment is forging a TC4 titanium alloy rod of Φ210×3000mm, and the processing method is as follows:

[0036]Step 1: Heat the TC4 titanium alloy large-size bar at 950°C for heat preservation, and after the heat preservation time is 4 hours, it is out of the furnace for forging;

[0037] Step 2: Use a wide flat anvil for forging, with a reduction of 60mm each time, feed the full anvil, and after forging a stroke (forging from one end to the other end), rotate 180° for flat square forging, and continue feeding the full anvil to forge a stroke , wait until the end of the stroke forging, rotate 90°, continue to send the full anvil to forge another stroke, wait until the end of the stroke forging and then rotate 180°, continue to feed the full anvil to forge a stroke, transition from flat square to square;

[0038] Step 3: After forging the square billet in step 2, carry out reverse forging along the direction of the diagonal line, first use a wide flat anvil, feed i...

Embodiment 2

[0042] This embodiment is a modified forging of TC4 titanium alloy bar of Φ240×2000mm, and the processing method is as follows:

[0043] Step 1: Heat the C4 titanium alloy large-size bar at 950°C for heat preservation, and after the heat preservation time is 4.5 hours, it is out of the furnace for forging;

[0044] Step 2: Use a wide flat anvil for forging, with a reduction of 70mm each time, feed the full anvil, after forging a stroke (forging from one end to the other end), rotate 180° for flat square forging, continue to feed the full anvil to forge a Stroke, wait until the end of the forging stroke, rotate 90°, continue to send the full anvil to forge another stroke, wait until the end of the stroke forging, then rotate 180°, continue to feed the full anvil to forge a stroke, transition from flat square to square;

[0045] Step 3: After forging the square billet in step 2, carry out reverse forging along the direction of the diagonal line, first use a wide flat anvil, feed...

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Abstract

The invention relates to a forging processing method of titanium alloy rods, in particular to a method for improving the microstructure uniformity of titanium alloy large-size rods. Its characteristic is that it includes the following steps: Step 1: Heat and keep the titanium alloy large-size bar at 40-60°C below the β transformation temperature for 2-4 hours, and then take it out of the furnace for forging after the holding time is up; Step 2: Use a wide flat anvil for forging , the amount of each reduction is 60-80mm, the full anvil is fed, after forging a stroke, rotate 180° for flat square forging, continue to feed the full anvil for one stroke, wait until the end of the forging stroke, rotate 90°, continue to fill the anvil Send another stroke for forging, and then rotate 180° until the forging of this stroke ends, and continue to feed forging with a full anvil for one stroke, thus transitioning from flat square forging to square forging. The present invention has the following advantages: 1) The technological process is short and the fire times are few. Only 1 to 2 fires are needed, and the technological process is obviously shortened, which is beneficial to reduce costs.

Description

technical field [0001] The invention relates to a forging processing method of titanium alloy rods, in particular to a method for improving the microstructure uniformity of titanium alloy large-size rods. Background technique [0002] Titanium alloy is a high-efficiency structural material with excellent comprehensive performance. It has the advantages of light weight, high specific strength, excellent high-temperature performance, and strong corrosion resistance. It is an important material used in aviation, aerospace, weapons, ships and other fields. The aviation industry is the main field of high-end application of titanium alloys, and the alloy grade with the largest amount of titanium alloys is TC4 (Ti-6Al-4V) medium-strength two-phase titanium alloy, accounting for about 70% of the output of titanium alloys, mainly used in aircraft structures parts etc. With the development of the aviation industry, in order to improve the safety and reliability of the aircraft, prolo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22F1/18
Inventor 朱宝辉胡晓晨薛长荣沈立华王培军赵洪章郑爱国任志东陈睿博
Owner 宁夏中色金航钛业有限公司
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