CN103121047B - Roll bending welds the method that C.P.Ti tube is made in compacting of putting english - Google Patents

Roll bending welds the method that C.P.Ti tube is made in compacting of putting english Download PDF

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Publication number
CN103121047B
CN103121047B CN201310066084.4A CN201310066084A CN103121047B CN 103121047 B CN103121047 B CN 103121047B CN 201310066084 A CN201310066084 A CN 201310066084A CN 103121047 B CN103121047 B CN 103121047B
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spinning
heat treatment
cylinder
sheet
tube
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CN103121047A (en
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胡宗式
赵文利
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BAOJI CHANGSHENG TITANIUM Co Ltd
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BAOJI CHANGSHENG TITANIUM Co Ltd
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Abstract

The invention provides a kind of roll bending and weld the method that C.P.Ti tube is made in compacting of putting english.Rolling after rolling after the common processing method of existing C.P.Ti tube has extruding, extruding perforation, roll piercing, band roll welding, sheet material rolls welding etc.The tubing that band rolls welding, sheet material rolls welding is called seam tubes, and they all exist weld seam problem.The present invention will solve the problem about weld seam.By Titanium board material by given size blanking, roll into tubulose, then carry out argon protection welding, as the blank of spinning operation.The spinning of blank more than two passages or two passages, is aided with heat treatment, the tubing produced like this, can eliminates the impact of weld seam.Rational technology, can't see weld seam.The present invention is applicable to manufacturing Φ more than 80 size pipe.<!--1-->

Description

Roll bending welds the method that C.P.Ti tube is made in compacting of putting english
Technical field
The invention belongs to the manufacture of the large gauge tubing of titanium in shape processing technique field, particularly non-ferrous metal or titanium alloy.
Background technology
Light specific gravity, the specific strength of titanium be high, have excellent corrosion resistance, is widely used in many aspects such as chemical industry, military project, ocean engineering, power station.C.P.Ti tube is a vital classification of titanium material.The tubing of Φ less than 120 has two kinds of manufacture methods now: (a) seamless pipe, rolling after rolling after processing method has extruding, extruding is bored a hole, roll piercing.B () titanium welding pipe, it rolls rear welding by titanium band.Usually be used in the heat exchanger in power station, specification is at Φ 16 ~ 40.The tubing of specification Φ more than 120, is generally rolled by sheet material and is welded.Some size pipe, because wall thickness rolls difficulty, then adopts press compacting semicircle, two semicircle butt welding.Weld seam on such tubing is a lot.By the impact of press tup width, press the length of semicircle at 1 meter ~ 1.5 meters.The tubing of one 3 meters long, has 5 ~ 8 road weld seams.Consider that weld seam is cast sturcture, plasticity is poor, and corrosion resistance is poorer than Deformation structure, and thus, when equipment de-sign, the wall of tubing suitably thickeies, and claims weld joint efficiency.Such as by the tubing calculating use 6 millimeters, consider that weld joint efficiency will use the tubing of 6.8 ~ 7.2 millimeters thick.Therefore, lot of materials waste can be produced for comparatively large gauge titanium pipe making at present, and due to plastic property of weld bead poor, corrosion resistance is poorer than Deformation structure, makes pipe workpiece quality have certain defect.
Summary of the invention
The object of the invention is to provide a kind of roll bending and welds the method that C.P.Ti tube is made in compacting of putting english, and is particularly suitable for the making of large gauge (Φ more than 80) titanium sheet material.
Roll bending welds the method that C.P.Ti tube is made in compacting of putting english, and its technological process is: select materials, and------sheet material is suppressed or rolled into tubular, and---------------------finished product heat treatment---checks---cutting scale---packaging to spinning to spinning in heat treatment in heat treatment in the distortion of spinning 20 ± 5% to be welded into cylinder in blanking.
In the present invention, cylinder making and flow-forming step are implemented as follows:
(1) cylinder makes: Titanium board material is pressed required size blanking, is rolled into cylinder, welds for thinner sheet material veneer reeling machine; For thicker sheet material, be pressed into two semicircles, then to being welded into cylinder with forcing press; Weld grinding is smooth, and rounding off is wanted in the commissure of inner surface;
(2) three rotary pressure deformation and heat treatment: cylindrical sleeve is carried out rotary pressure deformation first on plug, the diameter of plug than in tubing through little 0.2 ~ 0.4 millimeter, deformation amount controlling 20 ± 5%, first time vacuum heat treatment temperature 650 ~ 900 DEG C; Second time spinning makes cylindrical shell bulk deformation, deformation amount controlling 30 ~ 75%, heat treatment at 800 ~ 850 DEG C; Last 3rd time spinning, deflection 30 ~ 75%, heat treatment at 600 ~ 700 DEG C.
The C.P.Ti tube that present invention process can manufacture, general applicable Φ more than 80, wanting the tubing manufacturing Φ 3000, is also possible, as long as there is the spinning machine of dimension.
The processing material of pure titanium is as sheet material, bar, tubing, and generally, its tissue is α type, and weld seam is cast sturcture, claims β type.The tissue of β type, corrosion resistance is poorer than α type many.β type tissue is become α type, has to pass through processing and heat treatment.Cast sturcture β type, through first time processing, its historrhexis, form many core sources, there is recrystallization and grain growth in these core sources under the condition of heating, and new crystal grain instead of the crystal grain of cast sturcture, just changes cast sturcture, if the temperature of recrystallization is below transformation temperature, newly-generated tissue is α type.Usual this transformation will carry out many fire.
The present invention make use of the theory of the forming core of titanium, recrystallization, grain growth just, propose new roll bending and weld the method that C.P.Ti tube is made in compacting of putting english, by repeatedly spinning and heat treatment, make the tissue of the β type of weld seam generate the α type tissue of good corrosion resistance, substantially increase pipe workpiece quality.
Detailed description of the invention
Roll bending welds the method that C.P.Ti tube is made in compacting of putting english, and technical process is as follows: select materials, and------welding---the distortion of spinning about 20%---heat treatment---spinning---heat treatment---spinning---finished product heat treatment---inspection---cutting scale---packaging is suppressed or rolled to blanking---.
In concrete steps, process parameter control is as follows:
1, Titanium board material is pressed required size blanking, cylinder can be rolled into veneer reeling machine for thinner sheet material, weld; For thicker sheet material, diameter is less again, can not roll, be then pressed into two semicircles, then butt welding with forcing press.Be welded into larger than diameter of mandrel 0.4 ~ 1.5 millimeter of the internal diameter of cylindrical shell.2, weld the length of cylindrical shell, depend on that the length of finished product and spinning machine can revolve length.Such as produce the tubing of Φ 216/ Φ 208 × 3000, net weight 36 kilograms, blank Φ 235/ Φ 209 × 1000 weight 40.8 kilograms, wall thickness 13 millimeters, having more 4.8 kilograms than net weight is process allowance.3, plug diameter than in tubing through little 0.2 ~ 0.4 millimeter, pipe diameter hour gets the small value; Take large values when pipe diameter is large.4, weld grinding is smooth, rounding off is wanted in the commissure of inner surface.5, the main purpose of first pass spinning makes seam deformation, gives the distortion of about 20%; For thicker cylindrical shell, suitably heat, blank temperature 200 ~ 300 DEG C.Vacuum heat: temperature 650 ~ 900 DEG C.Lower a time is spun to finished product, gets lower temperature; Lower a time spinning does not go out finished product, gets higher temperature; Get higher temperature to be conducive to eliminating weld seam impact.The main purpose of second time spinning is cylindrical shell bulk deformation.Finished product can be spun at second time.In order to not see weld seam on surface, at least spinning three times.The main object of first pass spinning makes seam deformation, and give the distortion of about 20%, then heat treatment 900 DEG C, second time spinning main purpose is cylindrical shell bulk deformation, deflection 30 ~ 75%, then heat treatment 800 ~ 850 DEG C.3rd time spinning, deflection 30 ~ 75%, heat treatment 600 ~ 700 DEG C.For the tubing of Φ 216/ Φ 208 × 3000, net weight 36 kilograms, blank Φ 235/ Φ 209 × 1000 weight 40.8 kilograms, wall thickness 13 millimeters; First time spinning Φ 230/ Φ 208 × 100 weight 40.8 kilograms, then vacuum heat 900 DEG C.Second time spinning Φ 220/ Φ 208 × 2250, vacuum heat 850 DEG C; Second time spinning Φ 216/ Φ 208 × 3200, vacuum heat 650 DEG C.

Claims (1)

1. roll bending welds the method that C.P.Ti tube is made in compacting of putting english,------sheet material is suppressed or rolled into tubular, and---------------------finished product heat treatment---checks---cutting scale---packaging to spinning to spinning in heat treatment in heat treatment in the distortion of spinning 20 ± 5% to be welded into cylinder in blanking to it is characterized in that technological process is: select materials, and cylinder makes and flow-forming step is implemented as follows: (1) cylinder makes: by Titanium board material by required size blanking, cylinder is rolled into for thinner sheet material veneer reeling machine, welds; For thicker sheet material, be pressed into two semicircles, then to being welded into cylinder with forcing press; Weld grinding is smooth, and rounding off is wanted in the commissure of inner surface; Thicker cylindrical shell is heated, blank temperature 200 ~ 300 DEG C; (2) three rotary pressure deformation and heat treatment: cylindrical sleeve is carried out rotary pressure deformation first on plug, the diameter of plug is less than the internal diameter of tubing 0.2 ~ 0.4 millimeter, deformation amount controlling 20 ± 5%, first time vacuum heat treatment temperature 650 ~ 900 DEG C; Second time spinning make cylinder bulk deformation, deformation amount controlling 30 ~ 75%, vacuum heat at 800 ~ 850 DEG C; Last third time spinning, deflection 30 ~ 75%, vacuum heat at 600 ~ 700 DEG C.
CN201310066084.4A 2012-06-28 2013-03-01 Roll bending welds the method that C.P.Ti tube is made in compacting of putting english Active CN103121047B (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
CN201210218486.7 2012-06-28
CN2012102184867 2012-06-28
CN201210218486 2012-06-28
CN201310066084.4A CN103121047B (en) 2012-06-28 2013-03-01 Roll bending welds the method that C.P.Ti tube is made in compacting of putting english

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CN106111773B (en) * 2016-08-29 2017-12-26 中航动力股份有限公司 A kind of spin forming method of aero-engine compressor stator inner ring

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JP4400058B2 (en) * 2003-02-13 2010-01-20 Jfeスチール株式会社 Ferritic stainless steel welded pipe with excellent spinning processability
JP4544589B2 (en) * 2005-04-11 2010-09-15 日新製鋼株式会社 Ferritic stainless steel sheet with excellent spinning processability and spinning process
CN101579804B (en) * 2009-06-04 2010-08-11 航天材料及工艺研究所 Integral forming method of large size thin-walled titanium alloy cylindrical part without welding line
CN102463273A (en) * 2010-11-08 2012-05-23 北京有色金属研究总院 Preparation method of heavy-calibre nickel base alloy thin-walled tubular product

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Publication number Priority date Publication date Assignee Title
CN102416413A (en) * 2011-11-01 2012-04-18 哈尔滨工业大学 Preparation method of large-diameter aluminum alloy tube

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"2Al2铝合金形变热处理工艺在旋压工艺中的应用";刘黎明等;《中国有色金属学报》;20070731;第17卷(第7期);第1108页第1.2节 *

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