CN102899595A - Copper-nickel alloy tube preparation method - Google Patents
Copper-nickel alloy tube preparation method Download PDFInfo
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- CN102899595A CN102899595A CN2012103241513A CN201210324151A CN102899595A CN 102899595 A CN102899595 A CN 102899595A CN 2012103241513 A CN2012103241513 A CN 2012103241513A CN 201210324151 A CN201210324151 A CN 201210324151A CN 102899595 A CN102899595 A CN 102899595A
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Abstract
The invention relates to a copper-nickel alloy tube preparation method, which comprises the following steps: placing a BFe10-1-1 cupronickel material in a casting apparatus to carry out smelting and casting to obtain an ingot; placing the ingot in an extruder to carry out extrusion to obtain a tube billet; placing the tube billet into a tube rolling machine to carry out rolling to obtain a roll-type tube billet; placing the roll-type tube billet into a disk drawing machine to carry out disk drawing to obtain a roll-type finished product; placing the roll-type finished product in a bright annealing furnace to carry out annealing to obtain a bright finished product; and placing the bright finished product into a coil straightening machine unit to carry out straightening, straight placing and sawing cutting to obtain the ultra-long qualified finished product. The semi-hard state BFe10-1-1 copper-nickel alloy straight tube produced by the method of the present invention has characteristics of excellent plasticity and high tube end expansion processing property, high size deviation precision, thin wall thickness, long length, saved intermediate softening degradation time, and high yield, wherein production efficiency of the method of the present invention is 3 times production efficiency of the traditional straight drawing production method.
Description
Technical field
The present invention relates to the metal manufacture field, be specifically related to a kind of preparation method of cupronickel pipe.
Background technology
The cupronickel pipe is used for sea water desaltination, warship, electric power, refrigeration, field of petrochemical industry in a large number owing to have very high corrosion resistance nature and resisting contamination from marine organism characteristic; Be the indispensable key core parts of large condenser and heat exchanger, its quality product requires very high.Vehicles Collected from Market needs a kind of half-hard state BFe10-1-1 cupronickel pipe, and the specification of quality that this cupronickel pipe needs specifically has as follows:
1. mechanical property requirements is high: Y2 attitude, unit elongation 〉=25%, tensile strength: 345 ~ 390Mpa tensile strength is less than 345Mpa, too soft flexible, bad installing and using: but when tensile strength during greater than 390Mpa, easy to crack when installing swollen mouthful, under the bad working environments condition, bear foreign impacts power, break easily.
2. enlarging performance: require harshness, the enlarging rate is crackle not occur after the enlarging of 140%60 ° of punching cones; Continue again enlarging, even till pressure is collapsed or enlarging is ftractureed; If enlarging cracking occurs, crackle must not be expanded and enter diameter less than 140% position, otherwise it is defective to look flaring test.
3. wall thickness; Radius-thickness ratio is generally all greater than 30.
4. be shaped as straight tube and length overlength: the length＞18m of most of product; That have even surpass 25m.
5. dimensional precision is high: the size deviation of product is higher than the high-precision level requirement of respective country standard.
Because the overall characteristic of its specification of quality is high especially, the production technology difficulty is large, and existing manufacture method yield rate is low, produces and only relies on traditional simple vertical pulling mode of production, and its efficient is very low, causes this cupronickel pipe rare difficulty on market to ask.
Summary of the invention
The purpose of this invention is to provide a kind of rare earth element that do not add, by good combination and the warm type dish pull technology of drawing process and annealing process, adopt warm type dish daraf(reciprocal of farad) and volume to turn the preparation method that straight equipment unit is produced the cupronickel pipe of overlong straight pipe.
To achieve the above object of the invention, the technical solution used in the present invention is as follows:
A kind of preparation method of cupronickel pipe may further comprise the steps:
1) BFe10-1-1 copper-nickel alloy material is placed smelting-casting equipment carry out melting, casting obtains ingot casting;
2) with above-mentioned steps 1) in obtain ingot casting and put into extrusion machine and push and obtain pipe;
3) with above-mentioned steps 2) in the pipe that obtains put into tube rolling mill and be rolled and obtain the web-like pipe;
4) with above-mentioned steps 3) in the web-like pipe that obtains put into plate drawing machine and coil and draw, obtain the web-like finished product;
5) with above-mentioned steps 4) in the web-like finished product that obtains put into bright annealing oven and anneal, obtain bright finished product;
6) with above-mentioned steps 5) in obtain bright finished product and put into volume and turn that straight unit is aligned, straightened, sawing, obtain the qualified finished product of overlength.
Further, in the step 1), described BFe10-1-1 copper-nickel alloy material composition comprises: the Ni of 9.5-10.5% and Co, and the Fe of 1.1-1.3%, the Mn of 0.58-0.7%, surplus is Cu; Described smelting temperature is 1280-1330 ℃, and casting temp is 1260-1310 ℃, and casting speed is 300-400r/min.
Further, step 2) in, described extruding Heating temperature is 850-930 ℃, and squeeze is 1350 tons, and the extruding speed ratio is 20%.
Further, in the step 3), the rolling pass coefficient of extension of described tube rolling mill is 3.5-5.0.
Preferably, the rolling pass coefficient of extension of described tube rolling mill is 4.51.
Further, described tube rolling mill is LZG-85, and the roll aperture is 50-70mm.
Further, in the step 4), inferior at least three times of described dish draw bead, the inferior coefficient of extension of described telophragma draw bead is 1.2-1.6, and the inferior coefficient of extension of dish draw bead of eliminating work hardening is 1.7-2.0, and the inferior coefficient of extension of the dish draw bead of end product is 1.05-1.09.
Preferably, in the step 4), described dish draw bead is 4-12.
Further, in the step 4), described plate drawing machine is 2130 types, and the high-speed electric expreess locomotive rotating speed is 4600r/min, and drawing speed is 800m/min, and the bright annealing temperature in centre before finished disk draws is 750 ℃, soaking time 90min.
Further, in the step 5), described clean annealing temperature is 580 ℃, insulation 50min.
The preparation method of cupronickel pipe provided by the present invention does not add rare earth element, enters to produce from adjusting proportioning components, by good combination and the warm type dish pull technology of drawing process and annealing process; Make the tubing after the processing obtain satisfactory mechanical property and enlarging processing performance, adopt warm type dish daraf(reciprocal of farad) and volume to turn straight equipment unit and produce overlong straight pipe, production efficiency and yield rate several times are higher than the vertical pulling method mode of production.
This programme makes the cupronickel pipe adopt three measures in the dish draw bead of needs elimination work hardening is inferior, and the copper pipe that dish is pulled through in the journey produces 600 ℃ of left and right sides temperature, realizes that the warm type dish draws.
1. take the stretch process rate of large amount of finish, coefficient of extension is at least 1.7, have in addition up to 2.0.
2. the pinch roll that installs large frictional coefficient before and after the stretching die holder additional adds the frictional force of large copper pipe.
3. add deep bid pulling rate degree: high-speed electric expreess locomotive: 4600rpm, drawing speed: 800m/min.
Like this, be pulled through in the journey at dish, because high working modulus produces greatly distortion heat; And great friction coefficient and high-speed disc draw the frictional force that produces can generate a large amount of heat energy, the copper pipe temperature is risen to about 600 ℃, dynamic recrystallization occurs, eliminate the work hardening phenomenon, saving special intermediate softening degenerates, save time, realized the continuous production that dish draws, greatly improved production efficiency.
The half-hard state BFe10-1-1 cupronickel straight tube that adopts method production of the present invention to obtain has good plasticity and very high enlarging manufacturability, and the size deviation precision is high, wall thickness, and length can super length.Production efficiency is 3 times of the simple vertical pulling production method of tradition, and yield rate exceeds more than 30%.
Description of drawings
Fig. 1 is the technical process figure of the production of the inventive method.
Embodiment
In order to make purpose of the present invention, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, is not intended to limit the present invention.
Referring to Fig. 1, a kind of preparation method of cupronickel pipe may further comprise the steps:
1) BFe10-1-1 copper-nickel alloy material is placed smelting-casting equipment carry out melting, the casting obtain ingot casting, described BFe10-1-1 copper-nickel alloy material composition comprises: the Ni of 9.5-10.5% and Co, the Fe of 1.1-1.3%, the Mn of 0.58-0.7%, surplus is Cu; Described smelting temperature is 1280-1330 ℃, and casting temp is 1260-1310 ℃, and casting speed is 300-400r/min;
2) with above-mentioned steps 1) in obtain ingot casting and put into extrusion machine and push and obtain pipe, described extruding Heating temperature is 850-930 ℃, squeeze is 1350 tons, the extruding speed ratio is 20%;
3) with above-mentioned steps 2) in the pipe that obtains put into tube rolling mill and be rolled and obtain the web-like pipe, the rolling pass coefficient of extension of described tube rolling mill is 3.5-5.0, preferred rolling pass coefficient of extension is 4.51, and described tube rolling mill can be selected LZG-85, and the roll aperture is 50-70mm;
4) with above-mentioned steps 3) in the web-like pipe that obtains put into plate drawing machine and coil and draw, obtain the web-like finished product, inferior at least three times of described dish draw bead, preferred 4-12 time, the inferior coefficient of extension of described telophragma draw bead is 1.2-1.6, the inferior coefficient of extension of dish draw bead of eliminating work hardening is 1.7-2.0, the inferior coefficient of extension of the dish draw bead of end product is 1.05-1.09, preferred 2130 types of described plate drawing machine, the high-speed electric expreess locomotive rotating speed is 4600r/min, drawing speed is 800m/min, and the bright annealing temperature in centre before finished disk draws is 750 ℃, soaking time 90min;
5) with above-mentioned steps 4) in the web-like finished product that obtains put into bright annealing oven and anneal, obtain bright finished product, described clean annealing temperature is 580 ℃, insulation 50min;
6) with above-mentioned steps 5) in obtain bright finished product and put into volume and turn that straight unit is aligned, straightened, sawing, obtain the qualified finished product of overlength.
Embodiment 1
A kind of preparation method of cupronickel pipe may further comprise the steps:
Softening annealing, the finished disk that starting material batching, melting, on-the-spot sample analysis, casting, extruding, rolling, dish drew, went out finished product shroud draw bead time draws, bright stress relief annealing, volume turn straight finishing, finished product.Wherein, starting material batching principal element chemical ingredients scope is as shown in table 1:
Table 1BFe10-1-1 principal element chemical Composition Control scope
The stretching coefficient of extension is as shown in table 2:
Table 2 stretching coefficient of extension
| Passage | Coefficient of extension |
| Stretching passage in the middle of general | 1.2～1.6 |
| Need to eliminate the stretching passage of work hardening | 1.7～2.00 |
| Last finished product stretching passage | 1.05～1.09 |
Parameter and annealing is as shown in table 3:
Table 3 annealing process
Present method has adopted the high-precision level of size deviation control technology, and the finished product mould adopts high, the extremely wear-resisting glomerocryst mould of dimensional precision, by accurate measuring technique, reaches the high-precision level requirement of product size deviation.
The present invention has adopted cupronickel pipe overlength production technology, at first draws by the warm type dish and produces the web-like copper pipe, turns the cupronickel straight tube that straight equipment unit is produced overlength by volume again.For the super length copper pipe of 〉=25m, for overcoming the problem that can not transport, and with the delivery of web-like copper pipe, and carry volume and turn straight equipment unit to the client location, change the web-like copper pipe into straight tube, scale cuts the required super length cupronickel straight tube of client.
The present invention has adopted warm type dish pull technology, the dish that generally will realize the copper alloy tube serialization draws production, then must be pulled through in the journey at dish and produce 600 ℃ of left and right sides temperature and eliminate the work hardening phenomenon, the copper pipe that this programme makes the cupronickel pipe adopt three measures that dish is pulled through in the journey in the dish draw bead of needs elimination work hardening is inferior produces 600 ℃ of left and right sides temperature, realize that the warm type dish draws: the stretch process rate of taking large amount of finish, coefficient of extension is at least 1.7, have in addition up to 2.0; The pinch roll that installs large frictional coefficient before and after the stretching die holder additional adds the frictional force of large copper pipe; Add deep bid pulling rate degree: high-speed electric expreess locomotive: 4600rpm, drawing speed: 800m/min.Like this, be pulled through in the journey at dish, because high working modulus produces greatly distortion heat; And great friction coefficient and high-speed disc draw the frictional force that produces can generate a large amount of heat energy, the copper pipe temperature is risen to about 600 ℃, dynamic recrystallization occurs, eliminate the work hardening phenomenon, save special intermediate softening annealing, save time, realized the continuous production that dish draws, greatly improved production efficiency.
The above is preferred embodiment of the present invention only, is not to limit practical range of the present invention; If do not break away from the spirit and scope of the present invention, the present invention is made amendment or is equal to replacement, all should be encompassed in the middle of the protection domain of claim of the present invention.
Claims (10)
1. the preparation method of a cupronickel pipe is characterized in that, may further comprise the steps:
1) BFe10-1-1 copper-nickel alloy material is placed smelting-casting equipment carry out melting, casting obtains ingot casting;
2) with above-mentioned steps 1) in obtain ingot casting and put into extrusion machine and push and obtain pipe;
3) with above-mentioned steps 2) in the pipe that obtains put into tube rolling mill and be rolled and obtain the web-like pipe;
4) with above-mentioned steps 3) in the web-like pipe that obtains put into plate drawing machine and coil and draw, obtain the web-like finished product;
5) with above-mentioned steps 4) in the web-like finished product that obtains put into bright annealing oven and anneal, obtain bright finished product;
6) with above-mentioned steps 5) in obtain bright finished product and put into volume and turn that straight unit is aligned, straightened, sawing, obtain finished product.
2. method according to claim 1 is characterized in that, in the step 1), described BFe10-1-1 copper-nickel alloy material composition comprises: mass percent is Ni and the Co of 9.5-10.5%, mass percent is the Fe of 1.1-1.3%, and mass percent is the Mn of 0.58-0.7%, and surplus is Cu; Described smelting temperature is 1280-1330 ℃, and casting temp is 1260-1310 ℃, and casting speed is 300-400r/min.
3. method according to claim 1 is characterized in that: step 2) in, described extruding Heating temperature is 850-930 ℃, and squeeze is 1350 tons, and the extruding speed ratio is 20%.
4. method according to claim 1, it is characterized in that: in the step 3), the rolling pass coefficient of extension of described tube rolling mill is 3.5-5.0.
5. method according to claim 4, it is characterized in that: the rolling pass coefficient of extension of described tube rolling mill is 4.51.
6. method according to claim 4, it is characterized in that: described tube rolling mill is LZG-85, the roll aperture is 50-70mm.
7. method according to claim 1, it is characterized in that: in the step 4), inferior at least three times of described dish draw bead, the inferior coefficient of extension of described telophragma draw bead is 1.2-1.6, the inferior coefficient of extension of dish draw bead of eliminating work hardening is 1.7-2.0, and the inferior coefficient of extension of the dish draw bead of end product is 1.05-1.09.
8. method according to claim 7 is characterized in that: in the step 4), described dish draw bead is 4-12.
9. method according to claim 1, it is characterized in that: in the step 4), described plate drawing machine is 2130 types, the high-speed electric expreess locomotive rotating speed is 4600r/min, drawing speed is 800m/min, and the bright annealing temperature in centre before finished disk draws is 750 ℃, soaking time 90min.
10. method according to claim 1, it is characterized in that: in the step 5), described clean annealing temperature is 580 ℃, insulation 50min.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103817168A (en) * | 2014-02-21 | 2014-05-28 | 无锡隆达金属材料有限公司 | Drawing production process of monel alloy pipe |
| CN104630554A (en) * | 2015-02-06 | 2015-05-20 | 苏州富瑞合金科技股份有限公司 | Preparation method of straight tin brass tube for oil pump |
| CN105841539A (en) * | 2015-01-15 | 2016-08-10 | 王青佐 | Tubing of heat radiating conduit |
| CN109433850A (en) * | 2018-10-30 | 2019-03-08 | 江苏亚太航空科技有限公司 | The technique of aluminum alloy round pipe drawing manufacture |
| 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 |
| CN115505767A (en) * | 2022-09-27 | 2022-12-23 | 江苏隆达超合金股份有限公司 | Manufacturing method of high-plasticity BFe10-1-1 white copper pipe |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103817168A (en) * | 2014-02-21 | 2014-05-28 | 无锡隆达金属材料有限公司 | Drawing production process of monel alloy pipe |
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| CN105841539A (en) * | 2015-01-15 | 2016-08-10 | 王青佐 | Tubing of heat radiating conduit |
| CN104630554A (en) * | 2015-02-06 | 2015-05-20 | 苏州富瑞合金科技股份有限公司 | Preparation method of straight tin brass tube for oil pump |
| CN109433850A (en) * | 2018-10-30 | 2019-03-08 | 江苏亚太航空科技有限公司 | The technique of aluminum alloy round pipe drawing manufacture |
| 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 |
| CN115505767A (en) * | 2022-09-27 | 2022-12-23 | 江苏隆达超合金股份有限公司 | Manufacturing method of high-plasticity BFe10-1-1 white copper pipe |
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