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Preparation method of thickness-diameter ratio longitudinal titanium and titanium alloy welded pipe

A titanium alloy, thickness-to-diameter ratio technology, applied in welding equipment, arc welding equipment, metal processing equipment, etc., can solve problems such as incomplete forming, wavy forming edges, and rebound welding

Inactive Publication Date: 2013-04-03
LUOYANG SUNRUI TI PRECISION CASTING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For titanium welded pipes of this thickness and diameter, due to the large diameter and thin wall, that is, the raw material titanium strip is thin and wide. This thin and wide titanium strip has a large directionality due to the fluidity of the metal in the process of forming a welded pipe. , there are problems such as incomplete forming and serious waves at the forming edge, serious rebound after forming and difficult welding, etc. These problems have become technical difficulties in the production of such large-diameter thin-walled titanium welded pipes

Method used

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  • Preparation method of thickness-diameter ratio longitudinal titanium and titanium alloy welded pipe
  • Preparation method of thickness-diameter ratio longitudinal titanium and titanium alloy welded pipe
  • Preparation method of thickness-diameter ratio longitudinal titanium and titanium alloy welded pipe

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Effect test

Embodiment 1

[0031] The raw material is TA2 titanium belt, the width is 122.0~123.5, the wall thickness is 0.68~0.76mm, the continuous cold bending forming roll mold specification is Φ39, and the preparation of Φ39×0.7mm straight seam titanium welded pipe is carried out. The titanium belt passes through the centering device composed of 3 sets of non-powered vertical rollers on the forming unit. The gap between the vertical rollers is 10mm to realize the centering and guiding of the titanium belt. The titanium belt through the centering device enters the rough forming device in the forming unit, and the arrangement is flat roll + vertical roll + flat roll + vertical roll + flat roll. The gap between the flat roll and the vertical roll in the rough forming device is 25mm. The lower rolls of the 3 sets of flat rolls are driven independently with power, and the upper rolls and vertical rolls of the flat rolls are passively driven without power. After the rough forming device, the edge of the ...

Embodiment 2

[0035] The raw material is TA2 titanium belt, the width is 139~140.5, the wall thickness is 0.68~0.76mm, the continuous cold bending forming roll mold specification is Φ39, and the straight seam titanium welded pipe with the specification of Φ44.7×0.7mm is prepared.

[0036] The titanium belt passes through the centering device composed of 3 sets of non-powered vertical rollers on the forming unit. The gap between the vertical rollers is 10mm to realize the centering and guiding of the titanium belt. The titanium belt through the centering device enters the rough forming device in the forming unit, and the arrangement is flat roll + vertical roll + flat roll + vertical roll + flat roll. The gap between the flat roll and the vertical roll in the rough forming device is 25mm. The lower rolls of the 3 sets of flat rolls are driven independently with power, and the upper rolls and vertical rolls of the flat rolls are passively driven without power. After the rough forming device,...

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Abstract

The invention discloses a preparation method of a thickness-diameter ratio longitudinal titanium and titanium alloy welded pipe The preparation method is characterized by comprising the following processes of: (1) by online continuous cold-bending and forming of a titanium tape, preparing a pipe material which is formed as a cylindrical structure from a plate-shaped structure; (2) feeding into a welding box body, implementing argon tungsten-arc welding, thereby welding the un-sealed cylindrical structure into a sealed pipe-shaped structure; (3) implementing online conductive stress removing annealing on the welded pipe material; (4) sizing and straightening; and (5) implementing eddy loss-less flaw detection, ultrasonic loss-less flaw detection and airtightness detection, and obtaining a qualified pipe material in the circumstances of no alarm and no pressure relief. According to the thickness-diameter ratio titanium welded pipe which is produced by the method disclosed by the invention, the size and specification, mechanical performance, chemical component, surface quality and the like can meet the demands of the titanium welded pipe applied to the seawater desalination engineering; and the unconventional titanium welded pipe production process is broken through, to manufacture the unconventional titanium welded pipe applied to the seawater desalination engineering with the thickness-diameter ratio ranging from 0.015 to 0.020.

Description

technical field [0001] The invention relates to a processing technology for titanium and titanium alloy materials, in particular to a method for preparing straight seam titanium and titanium alloy welded pipes with thickness-to-diameter ratio. Background technique [0002] Because titanium has excellent properties such as small specific gravity, high specific strength and seawater corrosion resistance, titanium welded pipes have been widely used in seawater desalination, electric power, chemical industry and other fields. In the seawater desalination industry, it is often necessary to use straight seam titanium and titanium alloy welded pipes with large diameters such as Φ38~Φ50mm and thin wall thicknesses such as 0.5~1.0mm to make full use of the advantages of large cross-section heat transfer and good heating effect. The preparation technology of conventional specification straight seam titanium welded pipe is mature, and the conventional specification of titanium welded p...

Claims

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Application Information

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IPC IPC(8): B21C37/08B21D5/12B23K9/167C21D9/08C21D9/50C21D1/42
CPCY02P10/253Y02P10/25
Inventor 贾祥亚刘茵琪马虹剑张东东
Owner LUOYANG SUNRUI TI PRECISION CASTING
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