Method for processing Ti-6Al-4V titanium alloy large size bar material

A processing method, ti-6al-4v technology, applied in the field of titanium alloy materials, can solve the problems of difficulty in increasing bar length, long bar production cycle, and low level of ultrasonic flaw detection, so as to reduce uneven deformation and production cycle The effect of shortening and improving the level of ultrasonic flaw detection

Active Publication Date: 2009-07-08
BAOJI TITANIUM IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the realization of upsetting and drawing forging relies on manual clamping to complete the operation, which is limited by the operation method of upsetting and drawing forging, which makes the production cycle of domestic Ti-6Al-4V titanium alloy Φ100mm and above bars long, and the unit weight of bars is small. Poor quality consistency, low level of ultrasonic flaw detection
At present, the maximum diameter of the bars produced and applied ...

Method used

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  • Method for processing Ti-6Al-4V titanium alloy large size bar material
  • Method for processing Ti-6Al-4V titanium alloy large size bar material
  • Method for processing Ti-6Al-4V titanium alloy large size bar material

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Embodiment 1

[0034] The material processed in this embodiment is an ingot with an ingot number of 534-20050636 and a diameter of 710 mm. According to the processing method of the present invention, through forging and heat treatment, produce Φ 210mm bar.

[0035] Step 1. Blank forging: use a gas furnace to heat the Ti-6Al-4V titanium alloy ingot with a specification of Φ710mm to 1150°C, and then use a hydraulic press to forge 2 times at a temperature above the β transformation temperature. The final forging temperature is 950°C. Fire forging ratio is not less than 1.6;

[0036] Step 2. Intermediate forging: using an electric furnace to heat the forging billet completed in step 1 to a temperature of 20°C below the β transformation temperature, and forging with a hydraulic press, with a forging ratio of 1.5;

[0037] Step 3 Homogenization treatment: use an electric furnace to heat the forging billet so that the furnace temperature is 20°C above the β transition temperature, keep it warm for...

Embodiment 2

[0048] The material processed in this embodiment is an ingot with an ingot number of 534-20070732 and a diameter of 820 mm. According to the processing method of the present invention, through forging and heat treatment, produce Φ 350mm bar.

[0049] Step 1 Blank forging: heat and heat the Φ820mm Ti-6Al-4V titanium alloy ingot at 1150°C in a gas furnace, and then press a hydraulic press above the β transformation temperature for 3 fires, with a final forging temperature of 950°C. The fire and forging ratio is not less than 1.5;

[0050] Step 2 Intermediate forging: use an electric furnace to heat the forging billet completed in step 1 to a temperature of 20°C below the β transformation temperature, and forge it with a hydraulic press, with a forging ratio of 1.5;

[0051] Step 3 Homogenization treatment: use an electric furnace to heat the forging billet so that the furnace temperature is 20°C above the β transition temperature, keep it warm for 2 hours, and then take the for...

Embodiment 3

[0062] The material processed in this embodiment is an ingot with an ingot number of 534-20071540 and a diameter of 940 mm. According to the processing method of the present invention, through forging and heat treatment, produce Φ 400mm bar.

[0063] Step 1 Blank forging: heat and heat the Φ940mm Ti-6Al-4V titanium alloy ingot at 1150°C in a gas furnace, and then press a hydraulic press above the β transformation temperature for 2 fires, with a final forging temperature of 950°C. Fire forging ratio is not less than 1.6;

[0064] Step 2 Intermediate forging: use an electric furnace to heat the forging billet completed in step 1 to a temperature of 20°C below the β transformation temperature, and forge it with a hydraulic press, with a forging ratio of 1.5;

[0065] Step 3 Homogenization treatment: use an electric furnace to heat the forging billet so that the furnace temperature is 20°C above the β transition temperature, keep it warm for 2 hours, and then take the forging bil...

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Abstract

The invention relates to a large-scale processing method of Ti-6Al-4V titanium alloy rod bars with the phi of 200-400mm and the length of over 3000mm. The technique is characterized by adopting Ti-6Al-4V titanium alloy casting ingots with the phi of 700-950 mm, a gas furnace for heating and heat preserving at 1150 DEG C, a hydraulic press for hammer cogging, and adopting multi-heating number smithing over the beta transition temperature with the whole smithing ratio not smaller than 3; heating and smithing below the beta transition temperature by 20-30 DEG C with a smithing ratio of 1.5-1.8; preserving the heat for 0.5-3 hours over the beta transition temperature by 20 DEG C, water cooling, performing homogenization treatment; finally heating below the beta transition temperature by 30-50 DEG C, performing multi-heating number smithing in the alpha+beta phase section to the finished product format and the total forging ratio of the alpha+beta phase section being not less than 6. The weight of a single rod bar is greatly improved through integral smithing of casting ingots/large-scale smithing stocks, the length of the rod bar can reach more than 3 m and the rod bars have favorable tissue and performance.

Description

technical field [0001] The invention relates to a method for processing Ti-6Al-4V titanium alloy large-scale rods, belonging to the technical field of titanium alloy materials, specifically Ti-6Al-4V titanium alloy with a diameter of 200-400 mm, a length of more than 3000 mm, and high requirements for structure and performance The processing technology of large-size bars, the products are mainly used in important applications such as aviation and aerospace. Background technique [0002] Titanium alloy has the advantages of high specific strength, strong corrosion resistance, excellent high temperature performance, good machinability, etc. It is an important material used in aviation, aerospace, weapons and other fields. The aviation industry is the main application field of titanium alloys. Ti-6Al-4V (the brand name in my country's national standard is TC4) is the alloy brand with the largest amount, accounting for about 70% of the total output of titanium alloys, and is mai...

Claims

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Application Information

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IPC IPC(8): C22F1/18
Inventor 王韦琪冯永琦贾栓孝王永梅李渭清张平辉
Owner BAOJI TITANIUM IND CO LTD
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