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Manufacturing method for titanium welded pipe

A production method and a technology of titanium welded pipes, which are applied in the field of metal processing, can solve problems such as the difficulty in meeting the uniform tolerance requirements of the pipe wall thickness, and achieve the effects of improving operation efficiency, improving welding performance precision, and improving welding performance

Inactive Publication Date: 2013-03-27
江苏三得利不锈钢集团有限公司 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the ultra-thin wall is less than <0.5mm pure titanium and alloy welded pipe, no matter what kind of seamless pipe technology is used above, it is difficult to meet the uniform tolerance requirements of the pipe wall thickness

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The titanium strip with a thickness of 0.5mm and a width of 1000mm is loaded into the uncoiler, and then enters the forming device after being pulled out; in the forming device, the titanium strip is rolled and bent by a mold to form an open tube blank, and then welded by an argon arc welding machine to form a Closed titanium welded pipe; the closed titanium welded pipe is sent to the sizing device, and the outer diameter of the titanium welded pipe is rolled through the die in the sizing device; the titanium welded pipe enters the induction annealing device, and the temperature is controlled at 550 ° C. In the induction annealing device The place is heated to eliminate the stress unevenness generated during welding; the titanium welded pipe after induction annealing enters the pulling straightening device, and the temperature is controlled at 150°C, so that the ellipticity and straightness of the outer diameter of the titanium welded pipe meet the requirements of high-st...

Embodiment 2

[0028] Load the titanium strip with a thickness of 0.8mm and a width of 1100mm into the uncoiler, and then enter the forming device after being pulled out; the welding strip is introduced into the forming device through a pair of centering rollers horizontally, and the titanium strip is rolled and bent into an open tube by a mold The billet is then welded by an argon arc welding machine into a closed titanium welded pipe; the closed titanium welded pipe is sent to the sizing device, and the outer diameter of the titanium welded pipe is rolled through a die in the sizing device; the titanium welded pipe moves forward into the induction annealing device, The temperature is controlled at 600°C, and it is heated at the induction annealing device to eliminate the stress unevenness generated during welding; the titanium welded pipe after induction annealing enters the pull-out straightening device, and the temperature is controlled at 130°C to make the outer diameter of the titanium w...

Embodiment 3

[0030] Put the titanium strip with a thickness of 1mm and a width of 1200mm into the uncoiler, and then enter the forming device after being pulled out; in the forming device, the titanium strip is rolled and bent by a mold to form an open tube blank, and then welded by an argon arc welding machine to form a closed tube Titanium welded pipe; the closed titanium welded pipe is sent to the sizing device, and the outer diameter of the titanium welded pipe is rolled through the die in the sizing device; the titanium welded pipe moves forward into the induction annealing device, and the temperature is controlled at 650 ° C. It is heated to eliminate the stress unevenness generated during welding; the titanium welded pipe after induction annealing enters the pull-out straightening device, and the temperature is controlled at 170°C, so that the outer diameter and straightness of the titanium welded pipe meet the requirements of high-standard finished pipes; then The diameter of the ti...

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Abstract

The invention discloses a manufacturing method for a titanium welded pipe. The manufacturing method mainly comprises the following steps of: filling a titanium tape coil into an uncoiler, and pulling out a titanium tape which then enters a forming device; rolling and bending the titanium tape through a mold, thus forming the tape into an open pipe blank; welding the pipe blank through an argon arc welding machine to form a closed titanium welded pipe; sending the closed titanium welded pipe into a sizing device, and rolling the titanium welded pipe in the sizing device by a mold to fix the outer diameter of the titanium welded pipe; heating the titanium welded pipe which moves forward to enter an induction annealing device so as to eliminate uneven stress generated in welding; then straightening the pipe in a pull-out straightening device, measuring the diameter of the pipe in a laser diameter measuring device, and detecting the pipe at an eddy current inspection station; and finally cutting the pipe at a sizing cut-off station through a flying sawing machine in a sizing manner, and sending the formed titanium welded pipe into a finishing line. According to the manufacturing method, continuous and stable running can be realized, and the operation efficiency of an overall production line can be improved by more than 20%.

Description

technical field [0001] The invention belongs to the field of metal processing, and in particular relates to a manufacturing method of a titanium welded pipe. Background technique [0002] Ultra-thin-wall specification diameter φ25mm×0.5mm thick titanium welded pipe has very broad application prospects in nuclear power projects, chemical plants, and seawater desalination projects, and European and American countries are at the leading level in this technology. At present, the processing technology of low-strength, low-alloyed titanium and titanium alloy seamless pipes is relatively mature, and the cold-rolled vacuum annealing process is adopted. Two processes are used in the preparation of the tube billet: (1) Drilling and extrusion, the disadvantage is that the metal consumption is large, and the advantage is that the wall thickness of the tube billet is uniform and the selection of a suitable glass lubricant becomes the key to extrusion. (2) Cross-rolling piercing, the met...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21C37/08
Inventor 蒋中华吕余汉俊江叶琼磊陈伟宽陈俊
Owner 江苏三得利不锈钢集团有限公司
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