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Titanium alloy TC4 cold-rolled tube and production method thereof

A titanium alloy and cold-rolled tube technology, applied in the field of titanium alloy tube and its preparation, can solve the problems of difficult processing, etc., and achieve the effects of good metal internal structure, reduced power consumption cost, and good quality

Active Publication Date: 2010-09-08
忠世高新材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] With the continuous development of titanium alloys, there is an increasing demand for titanium alloys with high strength, high toughness, high temperature resistance and corrosion resistance, especially the demand for titanium alloy pipes is increasing, and the processing of titanium alloy pipes is becoming more and more difficult. Most of the titanium alloy TC4 pipes are used in oil fields, nuclear power plants, chemical industry and other industries, but the current titanium alloy TC4 pipes are usually coiled and welded with plates, hollowed out with bars, hinged inside the car after skew rolling and piercing. At present, there is no such pipe in China. A company capable of cold-rolling titanium alloy (TC4) pipes

Method used

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  • Titanium alloy TC4 cold-rolled tube and production method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Concrete preparation process is as follows:

[0027] 1. Made of TC4 tube blank Add paraffin wax lubricant to the inner surface of the tube billet, and roll it. The rolling deformation in the first pass is 24%, the rolling speed is 30 times / min, oxidation annealing, the annealing temperature is 800 ° C for 1.5 hours, and the scraping defect is repaired after air cooling;

[0028] 2. Add paraffin wax lubricant to the inner surface of the tube billet from the first pass, and roll it. The rolling deformation of the second pass is 28%, the rolling speed is 30 times / min, 50 passes of unilateral inner hinge, oxidation annealing , the annealing temperature is 800 ° C for 1.5 hours, and the defects are repaired after air cooling;

[0029] 3. Add paraffin wax lubricant to the inner surface of the tube billet coming down from the second pass, and carry out rolling. The rolling deformation in the third pass is 35%, and the rolling speed is 35 times / min. After rolling, each end of...

Embodiment 2

[0034] Concrete preparation process is as follows:

[0035] 1. Made of TC4 tube blank Add paraffin wax and molybdenum disulfide lithium-based grease lubricant to the inner and outer surfaces of the tube billet respectively, and carry out rolling. The rolling deformation in the first pass is 15%, the rolling speed is 20 times / min, 80 unilateral inner hinges, oxidation Annealing, the annealing temperature is 600 ℃ for 3 hours, and the defects are repaired after air cooling.

[0036] 2. Add paraffin wax and molybdenum disulfide lithium-based grease lubricants to the inner and outer surfaces of the tube blanks in the first pass, and roll them. The rolling deformation in the second pass is 38%, and the rolling speed is 30 times / min. After rolling, both ends cracked 6 cm, and the surface quality in the middle is better. Cut the ends, oxidize and anneal, anneal at 600°C for 3 hours, and repair the defects after air cooling.

[0037] 3. Add paraffin wax and molybdenum disulfide lit...

Embodiment 3

[0043] Concrete preparation process is as follows:

[0044] 1. Made of TC4 tube blank Molybdenum disulfide lubricant is added to the inner and outer surfaces of the tube blank, and the rolling is carried out. The rolling deformation in the first pass is 25%, the rolling speed is 30 times / min, oxidation annealing, the annealing temperature is 900 ° C for 1 hour, and the air cooling is repaired. scrape defects.

[0045] 2. Molybdenum disulfide lubricant is added to the inner and outer surfaces of the tube billet from the first pass, and then rolled. The rolling deformation in the second pass is 35%, the rolling speed is 35 times / min, and the unilateral internal hinge 50 passes, oxidation annealing, annealing temperature 900 ℃ for 1 hour, air-cooled and repaired scraping defects.

[0046] 3. Molybdenum disulfide lubricant is added to the inner and outer surfaces of the tube blanks in the second pass, and then rolled. The rolling deformation in the third pass is 38%, and the ro...

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Abstract

The invention relates to a titanium alloy, in particular to a titanium alloy TC4 cold-rolled tube and a production method thereof. By weight, the composition of the alloy is as follows: the balance of Ti, 5.5 percent to 6.75 percent of Al, 3.5 percent to 4.5 percent of V, less than or equal to 0.1 percent of Fe, less than or equal to 0.1 percent of C, less than or equal to 0.03 percent of N, less than or equal to 0.015 percent of H and less than or equal to 0.15 percent of O. The specification of the TC4 cold-rolled tube is outer diameter multiplied by wall thickness (however, the ratio of the outer diameter to the wall thickness is larger than 2). In the process of cold-rolling the titanium alloy tube, lubricant is added on the inner and the outer surfaces of the tube blank and the semi-finished tube, rolling is then carried out, the tube is annealed in oxygen after each rolling pass, a single edge is inwardly sheared by 0mm to 0.8mm, scale cinder and flaws are completely removed before the last one to two passes, the tube is washed by alkali and acid or acid and then by water and then rolled before a finished product is produced after 1 to 16 rolling passes, the rolled finished product is annealed in oxygen or vacuum, and the annealed finished product is washed by alkali and acid or acid again. The performance of the titanium alloy (TC4) cold-rolled tube is good, the metallographic structure is uniform, and the surface quality of the tube is good.

Description

technical field [0001] The invention relates to a titanium alloy pipe and its preparation, in particular to a TC4 cold-rolled pipe and its preparation method. Background technique [0002] With the continuous development of titanium alloys, there is an increasing demand for titanium alloys with high strength, high toughness, high temperature resistance and corrosion resistance, especially the demand for titanium alloy pipes is increasing, and the processing of titanium alloy pipes is becoming more and more difficult. Most of the titanium alloy TC4 pipes are used in oil fields, nuclear power plants, chemical industry and other industries, but the current titanium alloy TC4 pipes are usually coiled and welded with plates, hollowed out with bars, hinged inside the car after skew rolling and piercing. At present, there is no such pipe in China. A company that can cold-roll titanium alloy (TC4) pipes. Contents of the invention [0003] The object of the present invention is to...

Claims

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Application Information

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IPC IPC(8): C22C14/00C22F1/18C21D1/26C21D9/08C21D8/10B21B37/00B21B37/58
Inventor 张忠世郭淑君孙雪梅张政宏
Owner 忠世高新材料股份有限公司
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