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A preparation method of ta2 cold-rolled titanium strip for low-strength, easy-to-form welded pipes

A low-strength, forming welding technology, applied in the field of titanium material processing, can solve the problems of prolonging the service life of welded pipe forming roller molds, low production speed of welded pipe production lines, and easy to produce wear marks on the surface of titanium welded pipes, etc., to achieve the reduction of mold design and manufacturing capacity requirements , good production adaptability, good appearance quality

Active Publication Date: 2020-04-14
LUOYANG SUNRUI TI PRECISION CASTING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to solve the problem that the surface of the produced titanium welded pipe is prone to wear marks due to the high transverse yield strength, small surface roughness, and large welded pipe forming resistance of the titanium strip, and the service life of the forming roller mold is short, and the production speed of the welded pipe production line is low. To solve the problem, a preparation method of TA2 cold-rolled titanium strip for low-strength and easy-to-form welded pipe is provided. By controlling the content of impurity elements in the billet and optimizing the preparation process of the titanium strip, the low yield strength and high surface area of ​​the titanium strip are realized. The hardness and roughness control effectively reduces the forming resistance of the titanium strip welded pipe, greatly prolongs the service life of the welded pipe forming roller mold, solves the quality problem of the surface forming wear marks of the titanium welded pipe, and improves the production speed of the welded pipe production line

Method used

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  • A preparation method of ta2 cold-rolled titanium strip for low-strength, easy-to-form welded pipes
  • A preparation method of ta2 cold-rolled titanium strip for low-strength, easy-to-form welded pipes

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Embodiment 1

[0025] Embodiment 1: using sponge titanium and TiO 2 Carry out batching, after batching O, Fe, C, N impurity element content mass percent is respectively 0.125%, 0.018%, 0.017%, 0.01%, [O] 当 =[O]%+0.5*[Fe]%+ 0.7*[C]%+2.5*[N]%=0.125%+0.5*0.018%+0.7* 0.017%+2.5*0.01%=0.1709%, and after Smelting, forging, hot rolling, cold rolling, annealing and other processes to obtain a 1.0mm annealed TA2 pure titanium cold-rolled titanium strip blank; use a cold rolling mill to cold-roll the titanium strip blank to a target thickness of 0.404mm, The cold-rolled deformation is 59.6%; the degreasing unit is used to clean and dry the cold-rolled titanium strip; the argon-protected continuous annealing line is used to perform Kaiping annealing on the cold-rolled titanium strip, the annealing temperature is 720 degrees Celsius, and the holding time is 4 minutes; Acid + nitric acid + water" mixed acid solution pickled the cold-rolled titanium strip after continuous annealing, and dried it; then us...

Embodiment 2

[0030] Embodiment 2: Using sponge titanium and TiO 2 Carry out batching, O, Fe, C, N impurity element content mass percent after batching is respectively 0.085%, 0.031%, 0.012%, 0.006%, [O] 当=[O]%+0.5*[Fe]% +0.7*[C]%+2.5*[N]%=0.085%+0.5*0.031%+0.7*0.012%+2.5*0.006%=0.1239%, and after Smelting, forging, hot rolling, cold rolling, annealing and other processes to obtain a 2.0mm annealed TA2 pure titanium cold-rolled titanium strip blank; use a cold rolling mill to cold-roll the titanium strip blank to a target thickness of 0.709 mm, The cold-rolled deformation is 64.6%; the degreasing unit is used to clean and dry the cold-rolled titanium strip; the argon-protected continuous annealing line is used to perform Kaiping annealing on the cold-rolled titanium strip, the annealing temperature is 680 degrees Celsius, and the holding time is 3 minutes; Acid + nitric acid + water" mixed acid solution pickled the cold-rolled titanium strip after continuous annealing, and dried it; then u...

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Abstract

A preparation method of TA2 cold-rolled titanium strips for low-strength and easy-to-form welded pipes, comprising the following steps: raw material preparation, cold rolling, degreasing, continuous annealing, pickling, smoothing, degreasing and sampling to obtain finished TA2 cold-rolled titanium strips for welded pipes . This patent passed [O] 当 Characterize the overall content of strengthening impurity elements in raw materials, and give the appropriate range, control in the batching process, and combine the follow-up cold rolling, annealing and smoothing process measures to realize the control of the transverse yield strength of TA2 cold-rolled titanium strip for welded pipes at 260~350MPa The lower level effectively reduces the forming resistance of the welded pipe, thereby reducing the friction between the titanium strip and the welded pipe forming roller mold, and by increasing the surface hardness and roughness of the titanium strip, it reduces the adhesion between the titanium strip and the forming roller mold, thereby greatly The service life of the welded pipe forming roller is improved, and the quality problem of forming wear marks on the surface of the titanium welded pipe is solved.

Description

technical field [0001] The invention relates to a titanium material processing technology, in particular to a preparation method of a TA2 cold-rolled titanium strip for a low-strength, easy-to-form welded pipe. Background technique [0002] Titanium has the advantages of high specific strength and corrosion resistance. Compared with seamless pure titanium pipes, welded pipes can produce 0.3~1.0mm thin-walled pipes, with high production efficiency and yield, low cost, unlimited production length, stable batch production, high heat exchange efficiency, and equipment saving Titanium investment is widely used in civil industries such as electric power, seawater desalination, and chemical industry. TA2 cold-rolled titanium strip is prepared by using TA2 slabs, which are processed by hot rolling, cold rolling, annealing, finishing and other processes. Usually, TA2 slabs are used in accordance with GB / T3620.1 "Titanium and titanium alloy grades and The range of elements in the ch...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C14/00C22F1/18C22F1/02
CPCC22C14/00C22F1/02C22F1/183
Inventor 李渤渤陶会发刘茵琪王非陈涛朱丹阳申瑞
Owner LUOYANG SUNRUI TI PRECISION CASTING
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