Machining method of TC4 titanium alloy thick-wall tubular product

A processing method, a technology of titanium alloy pipes, applied in the field of forging processing of alloy materials, can solve the problems of small pipe specification span and low efficiency, and achieve the effect of uniform structure and performance

Active Publication Date: 2014-07-02
宝鸡拓普达钛业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a processing method of TC4 titanium alloy thick-walled pipe, which solves the problems of small span and low efficiency of the pipe obtained by the existing rolling processing method

Method used

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  • Machining method of TC4 titanium alloy thick-wall tubular product
  • Machining method of TC4 titanium alloy thick-wall tubular product
  • Machining method of TC4 titanium alloy thick-wall tubular product

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] The material processed in Example 1 is a titanium alloy tube blank with an ingot number of 534-20130121, with an outer diameter of Φ220 mm and an inner diameter of Φ120 mm. According to the processing method of the present invention, through forging and heat treatment, the pipe material with an outer diameter of Φ150mm and an inner diameter of Φ100mm is produced.

[0035] Step 1 Heating: Heating with an electric furnace, heating the selected titanium alloy tube billet to 980°C, holding it for 90 minutes and then out of the furnace for forging;

[0036] Step 2 forging: forging the tube blank heated in step 1 with a precision forging machine, the forging ratio is 0.5-1.0, the final forging temperature is 750°C, and the total forging ratio is 2.0;

[0037] Step 3 heat treatment: heat the pipe forged in step 2 to 780°C, keep it warm for 2 hours, then take the pipe out of the electric furnace and put it in the fan area for wind cooling within 20 seconds;

[0038] Step 4 Str...

Embodiment 2

[0049] The material processed in Example 2 is a tube blank with an ingot number of 534-20130233, with an outer diameter of Φ180 mm and an inner diameter of Φ90 mm. According to the processing method of the present invention, through forging and heat treatment, the pipe material with an outer diameter of Φ100mm and an inner diameter of Φ70mm is produced.

[0050] Step 1 Heating: Heating with an electric furnace, heating the selected titanium alloy tube billet to 960°C, holding it for 70 minutes and then out of the furnace for forging;

[0051] Step 2 forging: Forging the tube blank heated in step 2 with a precision forging machine, the forging ratio is 0.8-1.2, the final forging temperature is 750°C, and the total forging ratio is 3.0;

[0052] Step 3 heat treatment: heat the pipe forged in step 2 to 780°C, keep it warm for 2 hours, then take the pipe out of the electric furnace and put it into the fan area for wind cooling within 20 seconds;

[0053] Step 4 Straightening: Str...

Embodiment 3

[0063] The material processed in Example 3 is a titanium alloy tube blank with an ingot number of 534-20130345, with an outer diameter of Φ140 mm and an inner diameter of Φ70 mm. According to the processing method of the present invention, through forging and heat treatment, the pipe material with an outer diameter of Φ90mm and an inner diameter of Φ60mm is produced.

[0064]Step 1 Heating: use an electric furnace to heat, heat the selected titanium alloy tube billet to 950°C, keep it warm for 60 minutes and take it out of the furnace for forging;

[0065] Step 2 forging: forging the tube blank heated in step 1 with a precision forging machine, the forging ratio is 0.5-1.0, the final forging temperature is 750°C, and the total forging ratio is 2.3;

[0066] Step 3 heat treatment: heat the pipe forged in step 2 to 750°C, keep it warm for 1.5h, then take the pipe out of the electric furnace and put it into the fan area for wind cooling within 20 seconds;

[0067] Step 4 Straigh...

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Abstract

The invention relates to a machining method of a TC4 titanium alloy thick-wall tubular product. The machining method comprises the following steps: heating by virtue of an electric furnace, forging a selected titanium alloy tube blank by virtue of a precision forging machine after the titanium alloy tube blank is subjected to heating and heat preservation, taking the tubular product out within 20 seconds after maintaining the temperature for 1-3 hours at 700-800 DEG C, arranging the tubular product in a fan region, and carrying out air cooling; finally straightening the tubular product on a seven-roll straightening machine, so as to obtain the TC4 titanium alloy thick-wall tubular product. The machining method has the beneficial effects that an existing rolling method is replaced by virtue of a radial forging method, the heating and forging temperatures are reasonably selected to match parameters such as forging rolling reduction and feeding quantity during machining, the transverse deformation of metal is increased, the total forging ratio of a phase region alpha and a phase region beta is controlled, then the TC4 titanium alloy thick-wall tubular product is obtained, and the production blank of a large-scale TC4 titanium alloy thick-wall tubular product is made up; the TC4 titanium alloy thick-wall tubular product has the characteristics that the tissue and the performance are uniform, the clutter level in ultrasonic flaw detection is high, the outer diameter phi is 90-150mm, the wall thickness is 10-30mm, and the length is 1000-5000mm.

Description

technical field [0001] The invention relates to the technical field of alloy material forging processing, and in particular relates to a processing method for TC4 titanium alloy thick-walled pipes. Background technique [0002] Titanium metal smelting and processing technology is difficult and the process flow is complicated. At present, only four regions in the world, including the United States, Russia, Japan and China, have mastered the complete industrial production technology of titanium materials. In the "Twelfth Five-Year Plan" for strategic emerging industries jointly compiled by the National Development and Reform Commission, the Ministry of Industry and Information Technology and other departments, titanium materials have been included in the new material varieties that are mainly supported. [0003] According to the requirements of the "12th Five-Year Plan" development plan of the titanium industry, the production capacity of titanium sponge for titanium materials...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21C37/06B21J5/00
Inventor 王勇根王勇锦
Owner 宝鸡拓普达钛业有限公司
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