CN103861887A - Preparation method of high-performance copper/titanium bimetal capillary tube - Google Patents
Preparation method of high-performance copper/titanium bimetal capillary tube Download PDFInfo
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- CN103861887A CN103861887A CN201410106154.9A CN201410106154A CN103861887A CN 103861887 A CN103861887 A CN 103861887A CN 201410106154 A CN201410106154 A CN 201410106154A CN 103861887 A CN103861887 A CN 103861887A
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Abstract
The invention discloses a preparation method of a high-performance copper/titanium bimetal capillary tube and belongs to the field of preparation technologies of bimetal capillary tubes. The preparation method comprises the following steps: preparing a metallurgy-combined copper/titanium composite tube with size Phi being (7.0-15.0)mm*(0.5-2.0)mm by adopting a hot-swage process, then washing the inner surface and the outer surface of the metallurgy-combined copper/titanium composite tube with acid, directly drawing and machining for multiple times, and combining with intermediate annealing to obtain a copper/titanium bimetal capillary tube with size Phi being (0.5-6.1)mm*(0.1-0.8)mm. Through the preparation method, a small-sized copper/titanium composite tube is prepared by adopting the hot-swage process and then directly drawn and machined. The preparation method is simple in process and device, long in die service life and low in production cost. A method combining movable core head drawing with idle drawing is used in match with the necessary intermediate annealing, thereby relatively facilitating the deformation machining of a copper layer and a titanium layer; the prepared composite capillary tube is high in size accuracy and good in surface quality.
Description
technical field:
The present invention relates to bimetallic capillary tubes preparing technical field, a kind of high-performance copper/titanium bimetallic production method capillaceous that can be used for interface and reach metallurgical binding state is provided.
technical background:
Copper and copper alloy capillary is that specification limit is Φ (0.5～6.1) mm × (0.1～0.8) mm(external diameter × wall thickness, the tubing that class diameter is less, wall thickness is thinner down together) is the important raw and processed materials of extensive use in central air-conditioning, modern household electrical equipment, instrument, instrument.Be characterized in that difficulty of processing is large, added value is high.Along with developing rapidly of China's equipment manufacture, electrical appliance industry and ocean industry, the copper and copper alloy market demand capillaceous is increasing.But on naval vessel, the seawater strong corrosive environment place such as desalinization and Binhai Generator Station, copper and copper alloy capillary can be because of seawater corrosion reduction of service life, the reliability of lowering apparatus.Pure titanium capillary has extremely good decay resistance, but the thermal conductivity of titanium is lower, and heavy wall heat exchange performance capillaceous is poor, and thin-walled mechanical property capillaceous is difficult to again meet instructions for use.Copper/titanium bimetallic capillary is a kind of NEW TYPE OF COMPOSITE capillary of making at copper pipe inwall covering one deck titanium, advantage and the good heat conductivilitys of copper pipe such as owing to combining, titanium density is low, specific strength is high, fine corrosion resistance, make copper/titanium composite capillary have good combination property.Therefore, copper/titanium bimetallic capillary has broad application prospects in fields such as Ship Equipment, ocean industry, large-scale refrigerating system, electrical appliance industry, instrument and meters, is significant for the safety and reliability that improves Ship Equipment, industrial apparatus.
At present the preparation method of copper/composite ti pipe mainly contains: drawing is compound, hydraulic expanding-forming is compound and the method such as explosive welding.Hubbing [is shown in: Yu Jiazheng, metal composite pipe and preparation method and pipe joint structure, Chinese invention patent, CN1186921A, 1998-07-08] and hydraulic expanding-forming method [see: Wang student, Li Peining, Hydraulic Expansion closes the manufacturing technology of seamed stainless steel tube lined compound pipe, pressure vessel, 2001, 18(4): 50-52] etc. cold working composite algorithm is all by base material or base conventionally, clad material produces a small amount of plastic deformation and obtains interference fit and realize compound, the multiple tube interface bond strength of preparing is low, double-level-metal compatibility of deformation is poor, be difficult to make capillary.Explosive welding (EW) connection is the larger pressure that relies on explosive charge to produce, the method that makes two kinds of metals realize Solid-phase welding in interface and to be combined with each other, be characterized in that multiple tube interface bond strength is high, but operational danger is high, production efficiency is low, titanium layer is in uneven thickness, makes the thickness requirement that is difficult to ensure titanium layer after capillary.
summary of the invention:
The problem existing for solving above-mentioned technique, the object of this invention is to provide and a kind ofly adopt heat to revolve (High Temperature Rotating forges, and is called for short " heat is revolved ") to prepare copper/titanium bimetallic method capillaceous in conjunction with drawing forming.The method is to utilize the three-dimensional compressive stress distortion producing in rotary swaging process, realizes large pass deformation, realizes the metallurgical binding of multiple tube simultaneously under high temperature action; Adopt tube drawing with floating plug afterwards or/and empty drawing is processed, and in conjunction with intermediate annealing, obtain high-performance copper/titanium bimetallic capillary.
In order to achieve the above object, technical scheme of the present invention is: the method preparation size that adopts heat to revolve is metallurgical binding copper/composite ti pipe of Φ (7.0～15.0) mm × (0.5～2.0) mm, after surfaces externally and internally pickling, directly carry out the drawing processing of multi-pass, in conjunction with intermediate annealing, obtain the copper/titanium bimetallic capillary that is of a size of Φ (0.5～6.1) mm × (0.1～0.8) mm.Wherein, described multi pass drawing can adopt vertical pulling or dish to draw, and comprises tube drawing with floating plug or/and empty drawing; Drawing passes section shrinkage rate is between 10%～40%; When drawing accumulation section shrinkage rate reaches 70% left and right, need carry out an intermediate annealing; Described intermediate annealing process is 500 DEG C of annealing temperatures, annealing time 1 hour; In drawing process, apply lubricatedly, lubricating oil can adopt mineral oil or vegetable oil; Drawing speed is 1～20mm/min.
Concrete steps of the present invention are as follows:
Step 1: heat is revolved and prepared minor diameter metallurgical binding copper/composite ti pipe, technique is: pure TA2 titanium pipe is inserted in T2 copper tube, insertion is graphited and at 700 DEG C～900 DEG C, is carried out more than 50% heat of a time section shrinkage rate after newborn plug and revolve, and makes the metallurgical binding copper/composite ti pipe that is of a size of Φ (7.0～15.0) mm × (0.5～2.0) mm;
Step 2: after surface clean, through the tube drawing with floating plug of multi-pass, make multiple tube size reach external diameter Φ 6.1mm, below wall thickness 0.825mm; Wherein, drawing passes section shrinkage rate, between 10%～40%, when drawing accumulation section shrinkage rate reaches 70% left and right, need be carried out an intermediate annealing;
Step 3: in the time that tube outer diameter is less than Φ 2.0mm, adopt the empty drawing of multi-pass, drawing passes section shrinkage rate is between 10%～40%, when drawing accumulation section shrinkage rate reaches 70% left and right, need carry out an intermediate annealing and continue again drawing, the final copper/titanium bimetallic capillary that is of a size of Φ (0.5～2.0) mm × (0.1～0.5) mm that obtains.
tool of the present invention has the following advantages:
1, the present invention adopts heat to revolve preparation small size copper/composite ti pipe, then direct drawing processing, and technology and equipment is simple, die life is high, production cost is low.
2, copper/composite ti pipe interface that the present invention adopts heat to revolve preparation is metallurgical binding, and without compound between brittle metal, is conducive to the compatible deformation of double-level-metal in drawing process, obtains copper/titanium bimetallic capillary that interface bond strength is high.
3, the present invention adopts the method that tube drawing with floating plug and empty drawing combine, and is equipped with necessary intermediate annealing, is more conducive to the deformation processing of copper layer and titanium layer, and the composite capillary dimensional accuracy that obtains is high, surface quality good.
brief description of the drawings:
Fig. 1: a kind of heat is revolved the process chart that copper/titanium bimetallic capillary method is prepared in drawing.
detailed description of the invention:
Below in conjunction with embodiment, the invention will be further described.
Embodiment 1: the copper/titanium bimetallic processing method of capillary tube that is of a size of Φ 3.0mm × 0.5mm.
Pure the TA2 that is of a size of Φ 12.7mm × 0.55mm titanium pipe is inserted in the T2 copper tube that is of a size of Φ 17.0mm × 2.0mm, insertion is graphited, and at 900 DEG C, to carry out a time section shrinkage rate after newborn plug be that 54.6% heat is revolved, and makes the metallurgical binding copper/composite ti pipe that is of a size of Φ 14.1mm × 1.3mm.After surface clean, obtain the multiple tube of Φ 7.2mm × 0.7mm through the tube drawing with floating plug of 5 passages, carry out after the annealing in process of 500 DEG C of 1h, continuation tube drawing with floating plug 5 passages obtain copper/titanium bimetallic capillary of Φ 3.0mm × 0.5mm.Drawing passes section shrinkage rate, between 10%～40%, adopts mineral oil to be lubricated.
Embodiment 2: the copper/titanium bimetallic processing method of capillary tube that is of a size of Φ 2.0mm × 0.4mm.
Pure the TA2 that is of a size of Φ 12.0mm × 0.5mm titanium pipe is inserted in the T2 copper tube that is of a size of Φ 15.0mm × 1.4mm, the insertion heat of carrying out a time section shrinkage rate 59.7% after newborn plug at 800 DEG C of graphiting is revolved, and makes the metallurgical binding copper/composite ti pipe that is of a size of Φ 11.0mm × 1.0mm.After surface clean, obtain the multiple tube of Φ 5.5mm × 0.5mm through the tube drawing with floating plug of 5 passages, carry out becoming through 5 passage tube drawing with floating plug again after the annealing in process annealing of 500 DEG C of 1h copper/titanium bimetallic capillary of Φ 2mm × 0.4mm.Drawing passes section shrinkage rate, between 10%～40%, adopts mineral oil to be lubricated.
Embodiment 3: the copper/titanium bimetallic processing method of capillary tube that is of a size of Φ 0.5mm × 0.1mm.
Pure the TA2 that is of a size of Φ 8.0mm × 0.4mm titanium pipe is inserted in the T2 copper tube that is of a size of Φ 10.0mm × 0.9mm, the insertion heat of carrying out a time section shrinkage rate 65.8% after newborn plug at 700 DEG C of graphiting is revolved, and makes the metallurgical binding copper/composite ti pipe that is of a size of Φ 7.0mm × 0.6mm.After surface clean, obtain the multiple tube of Φ 4.0mm × 0.3mm through the tube drawing with floating plug of 4 passages; Carry out, after the annealing in process of 500 DEG C of 1h, obtaining the multiple tube of Φ 2.0mm × 0.15mm through the tube drawing with floating plug of 5 passages; Carry out after the annealing in process of 500 DEG C of 1h, then be drawn into copper/titanium bimetallic capillary (needing during this time to carry out the intermediate annealing of 500 DEG C of 1h) of Φ 0.5mm × 0.1mm through 7 passage skies.Drawing passes section shrinkage rate, between 10%～40%, adopts mineral oil to be lubricated.
Claims (2)
1. high-performance copper/titanium bimetallic preparation method capillaceous, it is characterized in that the method preparation size that adopts heat to revolve is metallurgical binding copper/composite ti pipe of Φ (7.0～15.0) mm × (0.5～2.0) mm, after surfaces externally and internally pickling, directly carry out the drawing processing of multi-pass, in conjunction with intermediate annealing, obtain the copper/titanium bimetallic capillary that is of a size of Φ (0.5～6.1) mm × (0.1～0.8) mm; Wherein, described multi pass drawing adopts vertical pulling or dish to draw, and comprises tube drawing with floating plug or/and empty drawing; Drawing passes section shrinkage rate is between 10%～40%; When drawing accumulation section shrinkage rate reaches 70%, need carry out an intermediate annealing; Described intermediate annealing process is 500 DEG C of annealing temperatures, annealing time 1 hour; In drawing process, apply lubricatedly, lubricating oil adopts mineral oil or vegetable oil; Drawing speed is 1～20mm/min.
2. a kind of high-performance copper/titanium bimetallic preparation method capillaceous according to claim 1, is characterized in that concrete preparation process is as follows:
Step 1: heat is revolved and prepared minor diameter metallurgical binding copper/composite ti pipe, technique is: pure TA2 titanium pipe is inserted in T2 copper tube, insertion is graphited and at 700 DEG C～900 DEG C, is carried out more than 50% heat of a time section shrinkage rate after newborn plug and revolve, and makes the metallurgical binding copper/composite ti pipe that is of a size of Φ (7.0～15.0) mm × (0.5～2.0) mm;
Step 2: after surface clean, through the tube drawing with floating plug of multi-pass, make multiple tube size reach external diameter Φ 6.1mm, below wall thickness 0.825mm; Wherein, drawing passes section shrinkage rate, between 10%～40%, when drawing accumulation section shrinkage rate reaches 70%, need be carried out an intermediate annealing;
Step 3: in the time that tube outer diameter is less than Φ 2.0mm, adopt the empty drawing of multi-pass, drawing passes section shrinkage rate is between 10%～40%, when drawing accumulation section shrinkage rate reaches 70%, need carry out an intermediate annealing and continue again drawing, the final copper/titanium bimetallic capillary that is of a size of Φ (0.5～2.0) mm × (0.1～0.5) mm that obtains.
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Cited By (3)
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| CN105414426A (en) * | 2015-12-11 | 2016-03-23 | 西北有色金属研究院 | Hot rotary forging method of zinc alloy small-specification pipe or rod |
| CN109013742A (en) * | 2018-07-06 | 2018-12-18 | 苏州市金翔钛设备有限公司 | A kind of processing technology of copper composite ti pipe material |
| CN112058939A (en) * | 2020-08-27 | 2020-12-11 | 苏州瑞康真空科技有限公司 | Red copper tensile member forming process |
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