High-efficiency and low-cost preparation method of ultra-long fine-grain industrial pure titanium rod billet for cross piercing

An industrial pure titanium, oblique rolling piercing technology, applied in metal rolling, metal rolling, metal processing equipment, etc., can solve the problems of large grinding and cutting head loss, high processing cost, long manufacturing cycle, etc., and achieve production efficiency And the effect of improving the yield, reducing the preparation cost, and high axial precision of rolling

Pending Publication Date: 2022-08-09
WESTERN TITANIUM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above-mentioned conventional process requires not less than 3 times of forging and no less than 2 times of grinding, and the length of the bar generally does not exceed 5000mm. The manufacturing cycle is long, the processing cost is high, and the loss of grinding and cutting is large.

Method used

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  • High-efficiency and low-cost preparation method of ultra-long fine-grain industrial pure titanium rod billet for cross piercing
  • High-efficiency and low-cost preparation method of ultra-long fine-grain industrial pure titanium rod billet for cross piercing
  • High-efficiency and low-cost preparation method of ultra-long fine-grain industrial pure titanium rod billet for cross piercing

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] This embodiment includes the following steps

[0029] Step 1. Use a 2500T press to carry out one-time billet forging on an industrial TA2 ingot with a cross-sectional diameter of 980mm at an initial forging temperature of 1050°C. In this process, the industrial TA2 ingot is first subjected to riveting and upsetting. The reduction amount of upsetting is 100mm~150mm, and the forging billet is chamfered before the end of forging, and the reduction amount of the chamfer is 30mm~50mm. During the forging process, the method of returning the hot material to the furnace is used to supplement the temperature, and the rolled forging billet is obtained after air cooling; the cross-section of the rolled forging billet is square, the side length is 220 mm, and the length is 900 mm;

[0030] In step 2, the rolled forging blank obtained in the step 1 is repaired and ground by a grinding wheel machine to remove its surface cracks and folding defects, so as to obtain a repaired and grou...

Embodiment 2

[0045] This embodiment includes the following steps

[0046] Step 1. Use a 1600T press to carry out one-time billet forging on an industrial TA1 ingot with a cross-sectional diameter of 620mm at an initial forging temperature of 1000°C. In this process, the industrial TA1 ingot is first subjected to riveting and upsetting. The reduction amount of upsetting is 100mm~150mm, and the forging blank is chamfered before the end of forging. The reduction amount of the chamfer is 30mm~50mm. During the forging process, the hot material is returned to the furnace to supplement the temperature, and the rolled forging billet is obtained after air cooling; the cross-section of the rolled forging billet is square, the side length is 280mm, and the length is 1200mm;

[0047] In step 2, the rolled forging blank obtained in the step 1 is repaired and ground by a grinder to remove its surface cracks and folding defects, and the repaired blank is obtained;

[0048] Step 3, adopt 650 rolling mill...

Embodiment 3

[0052] This embodiment includes the following steps

[0053] Step 1. Use a 1600T press to carry out one-time billet forging for an industrial TA2 ingot with a cross-sectional diameter of 790mm at an initial forging temperature of 1000°C. In this process, the industrial TA2 ingot is first subjected to riveting and upsetting. The reduction amount of upsetting is 100mm~150mm, and the forging blank is chamfered before the end of forging. The reduction amount of the chamfer is 30mm~50mm. During the forging process, the hot material is returned to the furnace to supplement the temperature, and the rolled forging billet is obtained after air cooling; the cross-section of the rolled forging billet is square, the side length is 240mm, and the length is 1500mm;

[0054] In step 2, the rolled forging blank obtained in the step 1 is repaired and ground by a grinder to remove its surface cracks and folding defects, and the repaired blank is obtained;

[0055] Step 3, adopt 650 rolling mil...

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Abstract

The invention discloses a high-efficiency and low-cost preparation method of an ultra-long fine-grain industrial pure titanium rod billet for cross piercing. The method comprises the following steps: 1, carrying out one-heating-number blooming forging on an industrial pure titanium cast ingot at 1000-1050 DEG C to obtain a rolled forging stock; 2, grinding the rolled forging stock to obtain a ground blank; thirdly, the coping blank is subjected to one-heating-number rolling at the temperature ranging from (Tbeta-15 DEG C) to (Tbeta-45 DEG C), and a finished rolled bar blank is obtained; and 4, peeling and sawing to obtain the industrial pure titanium rod billet for cross piercing. According to the method, the process of beta-phase region single-heating-number cogging and large-tonnage rolling mill one-heating-number large-deformation rolling forming is adopted, the problem of grain growth during multi-heating-number forging heating is avoided, efficient crushing of grains is achieved through combination of single-direction large deformation and alternation of multiple deformation modes, generation of fine grain structures in products is guaranteed, and the yield of the products is improved. And meanwhile, the forging heating number and the grinding number are reduced, the technological process is remarkably shortened, the length of a product bar blank is increased, and the preparation cost is reduced.

Description

technical field [0001] The invention belongs to the technical field of titanium alloy material processing, and in particular relates to a high-efficiency and low-cost preparation method of an industrial pure titanium bar blank for ultra-long fine-grain skew rolling and piercing. Background technique [0002] Industrial pure titanium (TA1, TA2, TA3) seamless pipes have good corrosion resistance and are widely used in civil industries such as petroleum refining, chemical industry, seawater desalination, etc. The high cost is an unfavorable factor limiting their application. The use of skew rolling and piercing to prepare tube blanks does not require mechanical processing of prefabricated inner holes, which can reduce material loss and improve yield, but its deformation is small and the grain refinement effect is limited. Improve the plasticity and deformation coordination of the tube blank, and reduce the cracking phenomenon during the cold rolling process of the tube. The co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21B15/00B21B1/16B21B37/74B21K29/00
CPCB21B15/0035B21B1/16B21B37/74B21K29/00
Inventor 李维杨佩华瑶侯智敏康聪李进元任驰强贠鹏飞欧阳文博
Owner WESTERN TITANIUM TECH
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