CN103045898B - Novel environment-friendly high-stibium tin alloy pipe and preparation method thereof - Google Patents
Novel environment-friendly high-stibium tin alloy pipe and preparation method thereof Download PDFInfo
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- CN103045898B CN103045898B CN201310016254.8A CN201310016254A CN103045898B CN 103045898 B CN103045898 B CN 103045898B CN 201310016254 A CN201310016254 A CN 201310016254A CN 103045898 B CN103045898 B CN 103045898B
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Abstract
The invention relates to a novel environment-friendly stibium-containing high-tin alloy pipe which comprises the following components in percentage by weight: 0.2-5% of stibium, 6-11% of tin and the balance of copper. According to the invention, the traditional lead element is replaced with the stibium element, thereby improving the environment friendliness of the alloy pipe; and through multiple extrusion operations, the tensile strength of the alloy can be greatly increased, the hardness of the alloy is increased from the original 70-80 HBS to 95-160 HBS, and the wear resistance of the alloy is improved.
Description
Technical field
The present invention relates to high-tin bronze compo pipe field, particularly relate to a kind of novel environmental protection height antimony and add ashbury metal pipe, and the preparation method of this compo pipe.
Background technology
High-tin bronze compo pipe is mainly used in the aspects such as all kinds of wear-resisting Zhou Wa ﹑ Zhou Tao ﹑ Fa Lan ﹑ gears, need that there is the features such as free-cutting machinability, current high-tin bronze pipe often adopts the mode of adding lead element in alloy material to realize the performance of easy chip, but it is well-known, the application of lead element will to environment, along with the progress of science and technology and the raising of people's living standard, also more and more stricter to the requirement of environmental protection, and the raising of people's environmental consciousness, make the high-tin bronze compo pipe at present containing lead element can not meet the demand of domestic and international high-end market gradually, seek a kind of unleaded environmental protection high-tin bronze compo pipe and become industry problem anxious to be resolved.
Summary of the invention
For solving the problems of the technologies described above, the invention provides a kind of novel employing antimony element and replacing the environmental protection height antimony of lead element to add ashbury metal pipe, and the preparation method of this compo pipe.
For achieving the above object, technical scheme provided by the present invention is as follows:
A kind of novel environment friendly adds antimony high tinalloy pipe, and be made up of the component of following percetage by weight: antimony 0.2%-5%, tin 6%-11%, surplus is copper.
Preferably, be made up of the component of following percetage by weight: antimony 1%-3%, tin 8%-10%, surplus is copper.
Preferably, be made up of the component of following percetage by weight: antimony 0.2%-5%, tin 6%-8%, surplus is copper.
Preferably, be made up of the component of following percetage by weight: antimony 4%-5%, tin 8%-10%, surplus is copper.
Preferably, be made up of the component of following percetage by weight: antimony 4%-5%, tin 6%-8%, surplus is copper.
Preferably, be made up of the component of following percetage by weight: antimony 0.2%-1%, tin 9%-11%, surplus is copper.
Above-mentioned novel environment friendly adds the preparation method of antimony high tinalloy pipe, comprises following steps:
Step one: be placed in main frequency furnace by electricity Xie Tong ﹑ Xi ﹑ antimony according to proportioning, is heated to be incubated to 1100 degree of-1250 degree after 1150 degree of-1350 degree melts completely;
Step 2: after the alloy liquid melted completely fully being stirred with graphite rod, cladding thickness is that the high-purity flaky graphite powder of 12-25cm is oxidized to prevent it in the above;
Step 3: be incubated after 25 minutes to 2 hours, is again warming up to 1200 degree of-1350 degree, and opens the vibrating device of main frequency furnace, vibration frequency is 1 time/second, adopting horizontal continuous casting method to be cast as external diameter is 75mm-105mm, and internal diameter is 40mm-55mm, and length is the alloy pipe of 500mm-600mm;
Step 4: the alloy pipe of continuous casting is carried out smooth surface process with copper ingot milling machine, make its smooth surface be convenient to next step extruding, the tube outer diameter after process is 72mm-100mm, internal diameter 42mm-58mm, length 500mm-600mm;
Step 5: by the heavy wall copper pipe after smooth surface process, in box-annealing furnace, carry out the process annealing of 250 degree of-400 degree, annealing time is 30-60 minute;
Step 6: pushed in 1200 tons of extruders by the compo pipe after annealing and extrude, extrusion speed is V=0.05 meter per second, after repeatedly extruding, become external diameter is 61mm-mm, and internal diameter is 49mm-68mm, and length is the tubing of 1050mm-1200mm;
Step 7: after the compo pipe extruded through previous step is carried out again annealing in process 1-3 hour, cool at normal temperatures;
Step 8: with finishing die, compo pipe being carried out last extruding is external diameter 90mm, and tolerance is ± 0.1mm, internal diameter 50mm-70mm, tolerance is ± tubing of 0.1mm, then burr being removed in the cutting of tubing two ends makes length scaling be 1000mm-1051mm, and tolerance is ± 1.0mm, completes preparation.
Adopt above-mentioned technique effect, beneficial effect of the present invention has:
Traditional lead element is replaced with antimony element by the present invention, not only increase the environmental-protecting performance of this compo pipe, and heavy alloyed tensile strength can be greatly put forward after repeatedly extruding, alloy rigidity is promoted to 95-160HBS by original 70-80HBS, and improves its wearability.
Detailed description of the invention
In order to make object of the present invention, technical scheme and advantage clearly understand, below in conjunction with embodiment, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
Embodiment 1
A kind of novel environment friendly adds antimony high tinalloy pipe, and be made up of the component of following percetage by weight: antimony 0.2%-5%, tin 6%-11%, surplus is copper.Preparation method is: be placed in main frequency furnace according to proportioning by electricity Xie Tong ﹑ Xi ﹑ antimony, is heated to be incubated to 1100 degree of-1250 degree after 1150 degree of-1350 degree melts completely.After fully being stirred by the alloy liquid melted completely with graphite rod, cover high-purity flaky graphite powder in the above and be oxidized to prevent it, thickness is about 12-25cm.Temperature retention time is after 25 minutes to 2 hours, and be again warming up to 1200 degree of-1350 degree, and open the vibrating device of main frequency furnace, vibration frequency is 1 time/second.Adopting horizontal continuous casting method to be cast as external diameter is 75mm-105mm, and internal diameter is 40mm-55mm, and length is the alloy pipe of 500mm-600mm.With copper ingot milling machine, the alloy pipe of continuous casting is carried out smooth surface process, make its smooth surface be convenient to next step extruding.Tube outer diameter after process is 72mm-100mm, internal diameter 42mm-58mm, length 500mm-600mm.By the heavy wall copper pipe after smooth surface process, in box-annealing furnace, carry out the process annealing of 250 degree of-400 degree, annealing time is 30-60 minute.Pushed in 1200 tons of extruders by compo pipe after annealing and extrude, extrusion speed is V=0.05 meter per second.Become after repeatedly extruding: external diameter 61mm-mm, internal diameter is 49mm-68mm, and length is the tubing of 1050mm-1200mm.After the compo pipe extruded through previous step is carried out again annealing in process 1-3 hour, cool at normal temperatures.With finishing die, compo pipe being carried out last extruding is external diameter 90mm, and tolerance is ± 0.1mm; Internal diameter 50mm-70mm, tolerance is ± tubing of 0.1mm, then burr is removed in the cutting of tubing two ends and make length scaling be 1000mm-1051mm, tolerance is ± 1.0mm.Complete preparation, pack and put in storage, obtained compo pipe performance parameter is obtained for raising in table 1 and traditional lead element alloy phase than hardness, wearability and tensile strength.
Embodiment 2
Novel environment friendly adds a preparation method for antimony high tinalloy pipe, be the antimony of the tin of 1%-3%, 8%-10%, and surplus cathode copper is placed in main frequency furnace by percetage by weight, is heated to be incubated to 1230 degree after 1200 degree of-1250 degree melts completely.After fully being stirred by the alloy liquid melted completely with graphite rod, cover high-purity flaky graphite powder in the above and be oxidized to prevent it, thickness is about 15-25cm.After temperature retention time 25-30 minute, be again warming up to 1350 degree, and open the vibrating device of main frequency furnace, vibration frequency is 1 time/second.Adopting horizontal continuous casting method to be cast as external diameter is 105mm, and internal diameter is 55mm, and length is the alloy pipe of 500mm.With copper ingot milling machine, the alloy pipe of continuous casting is carried out smooth surface process, make its smooth surface be convenient to next step extruding.Tube outer diameter after process is 100mm, internal diameter 58mm, length 500mm.By the heavy wall copper pipe after smooth surface process, carry out the process annealing of 300-350 degree in box-annealing furnace, annealing time is 30-60 minute.Pushed in 1200 tons of extruders by compo pipe after annealing and extrude, extrusion speed is V=0.05 meter per second.Become after repeatedly extruding: external diameter 92mm, internal diameter is 68mm, and length is the tubing of 1050-1100mm.After the compo pipe extruded through previous step is carried out again annealing in process 1-1.5 hour, cool at normal temperatures.With finishing die, compo pipe being carried out last extruding is external diameter 90mm, and tolerance is ± 0.1mm; Internal diameter 70mm, tolerance is ± tubing of 0.1mm, then burr is removed in the cutting of tubing two ends and make length scaling be 1000mm, tolerance is ± 1.0mm.Pack and put in storage, obtained compo pipe performance parameter is in table 1.
Embodiment 3
Novel environment friendly adds a preparation method for antimony high tinalloy pipe, is the tin of 1% by percetage by weight, the antimony of 8%, and surplus cathode copper is placed in main frequency furnace, is heated to 1200 degree and melts rear insulation to 1230 degree completely.After fully being stirred by the alloy liquid melted completely with graphite rod, cover high-purity flaky graphite powder in the above and be oxidized to prevent it, thickness is about 15-25cm.Temperature retention time, after about 28 minutes, is warming up to 1350 degree again, and opens the vibrating device of main frequency furnace, and vibration frequency is 1 time/second.Adopting horizontal continuous casting method to be cast as external diameter is 105mm, and internal diameter is 55mm, and length is the alloy pipe of 500mm.With copper ingot milling machine, the alloy pipe of continuous casting is carried out smooth surface process, make its smooth surface be convenient to next step extruding.Tube outer diameter after process is 100mm, internal diameter 58mm, length 500mm.By the heavy wall copper pipe after smooth surface process, carry out the process annealing of 300-350 degree in box-annealing furnace, annealing time is 30-60 minute.Pushed in 1200 tons of extruders by compo pipe after annealing and extrude, extrusion speed is V=0.05 meter per second.Become after repeatedly extruding: external diameter 92mm, internal diameter is 68mm, and length is the tubing of 1050-1100mm.After the compo pipe extruded through previous step is carried out again annealing in process 1-1.5 hour, cool at normal temperatures.With finishing die, compo pipe being carried out last extruding is external diameter 90mm, and tolerance is ± 0.1mm; Internal diameter 70mm, tolerance is ± tubing of 0.1mm, then burr is removed in the cutting of tubing two ends and make length scaling be 1000mm, tolerance is ± 1.0mm.Pack and put in storage, obtained compo pipe performance parameter is in table 1.
Embodiment 4
Novel environment friendly adds a preparation method for antimony high tinalloy pipe, is the tin of 3% by percetage by weight, the antimony of 10%, and surplus cathode copper is placed in main frequency furnace, is heated to be incubated to 1230 degree after 1200 degree of-1250 degree melts completely.After fully being stirred by the alloy liquid melted completely with graphite rod, cover high-purity flaky graphite powder in the above and be oxidized to prevent it, thickness is about 15-25cm.After temperature retention time 25-30 minute, be again warming up to 1350 degree, and open the vibrating device of main frequency furnace, vibration frequency is 1 time/second.Adopting horizontal continuous casting method to be cast as external diameter is 105mm, and internal diameter is 55mm, and length is the alloy pipe of 500mm.With copper ingot milling machine, the alloy pipe of continuous casting is carried out smooth surface process, make its smooth surface be convenient to next step extruding.Tube outer diameter after process is 100mm, internal diameter 58mm, length 500mm.By the heavy wall copper pipe after smooth surface process, carry out the process annealing of 350 degree in box-annealing furnace, annealing time is 30-60 minute.Pushed in 1200 tons of extruders by compo pipe after annealing and extrude, extrusion speed is V=0.05 meter per second.Become after repeatedly extruding: external diameter 92mm, internal diameter is 68mm, and length is the tubing of 1050-1100mm.After the compo pipe extruded through previous step is carried out again annealing in process 1-1.5 hour, cool at normal temperatures.With finishing die, compo pipe being carried out last extruding is external diameter 90mm, and tolerance is ± 0.1mm; Internal diameter 70mm, tolerance is ± tubing of 0.1mm, then burr is removed in the cutting of tubing two ends and make length scaling be 1000mm, tolerance is ± 1.0mm.Pack and put in storage, obtained compo pipe performance parameter is in table 1.
Embodiment 5
A kind of novel environment friendly adds the preparation method of antimony high tinalloy pipe, getting mass percent is 1-3%Sb (antimony), 6-8%Sn (tin), surplus Cu (copper), be placed in main frequency furnace, be heated to be incubated to 1200 degree after 1250 degree of-1300 degree melts completely.After fully being stirred by the alloy liquid melted completely with graphite rod, cover high-purity flaky graphite powder in the above and be oxidized to prevent it, thickness is about 15-20cm.After temperature retention time 30-50 minute, be again warming up to 1300 degree, and open the vibrating device of main frequency furnace, vibration frequency is 1 time/second.Adopting horizontal continuous casting method to be cast as external diameter is 100mm, and internal diameter is 50mm, and length is the alloy pipe of 500mm.With copper ingot milling machine, the alloy pipe of continuous casting is carried out smooth surface process, make its smooth surface be convenient to next step extruding.Tube outer diameter after process is 98mm, internal diameter 51mm, length 500mm.By the heavy wall copper pipe after smooth surface process, carry out the process annealing of 300-350 degree in box-annealing furnace, annealing time is 30-60 minute.Pushed in 1200 tons of extruders by compo pipe after annealing and extrude, extrusion speed is V=0.05 meter per second.Become after repeatedly extruding: external diameter 81mm, internal diameter is 64mm, and length is the tubing of 1050-1100mm.After the compo pipe extruded through previous step is carried out again annealing in process 1-1.5 hour, cool at normal temperatures.With finishing die, compo pipe being carried out last extruding is external diameter 80mm, and tolerance is ± 0.1mm; Internal diameter 65mm, tolerance is ± tubing of 0.1mm, then burr is removed in the cutting of tubing two ends and make length scaling be 1000mm, tolerance is ± 1.0mm.Pack and put in storage, obtained compo pipe performance parameter is in table 1.
Embodiment 6
Novel environment friendly adds a preparation method for antimony high tinalloy pipe, and getting mass percent is 1%Sb (antimony), and 6%Sn (tin), surplus Cu (copper), be placed in main frequency furnace, is heated to 1250 degree and melts rear insulation to 1200 degree completely.After fully being stirred by the alloy liquid melted completely with graphite rod, cover high-purity flaky graphite powder in the above and be oxidized to prevent it, thickness is about 15-20cm.After temperature retention time 30-50 minute, be again warming up to 1300 degree, and open the vibrating device of main frequency furnace, vibration frequency is 1 time/second.Adopting horizontal continuous casting method to be cast as external diameter is 100mm, and internal diameter is 50mm, and length is the alloy pipe of 500mm.With copper ingot milling machine, the alloy pipe of continuous casting is carried out smooth surface process, make its smooth surface be convenient to next step extruding.Tube outer diameter after process is 98mm, internal diameter 51mm, length 500mm.By the heavy wall copper pipe after smooth surface process, carry out the process annealing of 310 degree in box-annealing furnace, annealing time is about 45 minutes.Pushed in 1200 tons of extruders by compo pipe after annealing and extrude, extrusion speed is V=0.05 meter per second.Become after repeatedly extruding: external diameter 81mm, internal diameter is 64mm, and length is the tubing of 1050-1100mm.After the compo pipe extruded through previous step is carried out again annealing in process 1-1.5 hour, cool at normal temperatures.With finishing die, compo pipe being carried out last extruding is external diameter 80mm, and tolerance is ± 0.1mm; Internal diameter 65mm, tolerance is ± tubing of 0.1mm, then burr is removed in the cutting of tubing two ends and make length scaling be 1000mm, tolerance is ± 1.0mm.Pack and put in storage, obtained compo pipe performance parameter is in table 1.
Embodiment 7
Novel environment friendly adds a preparation method for antimony high tinalloy pipe, and getting mass percent is 3%Sb (antimony), and 8%Sn (tin), surplus Cu (copper), be placed in main frequency furnace, is heated to 1300 degree and melts rear insulation to 1200 degree completely.After fully being stirred by the alloy liquid melted completely with graphite rod, cover high-purity flaky graphite powder in the above and be oxidized to prevent it, thickness is about 15-20cm.Be incubated after 50 minutes, be again warming up to 1300 degree, and open the vibrating device of main frequency furnace, vibration frequency is 1 time/second.Adopting horizontal continuous casting method to be cast as external diameter is 100mm, and internal diameter is 50mm, and length is the alloy pipe of 500mm.With copper ingot milling machine, the alloy pipe of continuous casting is carried out smooth surface process, make its smooth surface be convenient to next step extruding.Tube outer diameter after process is 98mm, internal diameter 51mm, length 500mm.By the heavy wall copper pipe after smooth surface process, carry out the process annealing of 300-350 degree in box-annealing furnace, annealing time is 30-60 minute.Pushed in 1200 tons of extruders by compo pipe after annealing and extrude, extrusion speed is V=0.05 meter per second.Become after repeatedly extruding: external diameter 81mm, internal diameter is 64mm, and length is the tubing of 1050-1100mm.After the compo pipe extruded through previous step is carried out again annealing in process 1-1.5 hour, cool at normal temperatures.With finishing die, compo pipe being carried out last extruding is external diameter 80mm, and tolerance is ± 0.1mm; Internal diameter 65mm, tolerance is ± tubing of 0.1mm, then burr is removed in the cutting of tubing two ends and make length scaling be 1000mm, tolerance is ± 1.0mm.Pack and put in storage, obtained compo pipe performance parameter is in table 1.
Embodiment 8
A kind of novel environment friendly adds the preparation method of antimony high tinalloy pipe, getting mass percent is 4%-5%Sb (antimony), 8%-10%Sn (tin), surplus Cu (copper) are placed in main frequency furnace, are heated to be incubated to 1100 degree after 1150 degree of-1200 degree melts completely.After fully being stirred by the alloy liquid melted completely with graphite rod, the high-purity flaky graphite powder that cladding thickness is about 20-25cm is in the above oxidized to prevent it.Be incubated after 1-1.5 hour, be again warming up to 1200 degree, and open the vibrating device of main frequency furnace, vibration frequency is 1 time/second.Adopting horizontal continuous casting method to be cast as external diameter is 100mm, and internal diameter is 50mm, and length is the alloy pipe of 500mm.With copper ingot milling machine, the alloy pipe of continuous casting is carried out smooth surface process, make its smooth surface be convenient to next step extruding.Tube outer diameter after process is 98mm, internal diameter 51mm, length 500mm.By the heavy wall copper pipe after smooth surface process, carry out the process annealing of 300-350 degree in box-annealing furnace, annealing time is 40-50 minute.Pushed in 1200 tons of extruders by compo pipe after annealing and extrude, extrusion speed is V=0.05 meter per second.Become after repeatedly extruding: external diameter 81mm, internal diameter is 64mm, and length is the tubing of 1050-1100mm.After the compo pipe extruded through previous step is carried out again annealing in process 1-1.5 hour, cool at normal temperatures.With finishing die, compo pipe being carried out last extruding is external diameter 80mm, and tolerance is ± 0.1mm; Internal diameter 65mm, tolerance is ± tubing of 0.1mm, then burr is removed in the cutting of tubing two ends and make length scaling be 1000mm, tolerance is ± 1.0mm.Pack and put in storage, obtained compo pipe performance parameter is in table 1.
Embodiment 9
Novel environment friendly adds a preparation method for antimony high tinalloy pipe, and getting mass percent is 4%Sb (antimony), and 8%Sn (tin), surplus Cu (copper) are placed in main frequency furnace, is heated to 1200 degree and melts rear insulation to 1100 degree completely.After fully being stirred by the alloy liquid melted completely with graphite rod, the high-purity flaky graphite powder that cladding thickness is about 25cm is in the above oxidized to prevent it.Be incubated after 1.5 hours, be again warming up to 1200 degree, and open the vibrating device of main frequency furnace, vibration frequency is 1 time/second.Adopting horizontal continuous casting method to be cast as external diameter is 100mm, and internal diameter is 50mm, and length is the alloy pipe of 500mm.With copper ingot milling machine, the alloy pipe of continuous casting is carried out smooth surface process, make its smooth surface be convenient to next step extruding.Tube outer diameter after process is 98mm, internal diameter 51mm, length 500mm.By the heavy wall copper pipe after smooth surface process, carry out the process annealing of 300 degree in box-annealing furnace, annealing time is about 50 minutes.Pushed in 1200 tons of extruders by compo pipe after annealing and extrude, extrusion speed is V=0.05 meter per second.Become after repeatedly extruding: external diameter 81mm, internal diameter is 64mm, and length is the tubing of 1100mm.The compo pipe extruded through previous step was carried out again annealing in process after 1.5 hours, cools at normal temperatures.With finishing die, compo pipe being carried out last extruding is external diameter 80mm, and tolerance is ± 0.1mm; Internal diameter 65mm, tolerance is ± tubing of 0.1mm, then burr is removed in the cutting of tubing two ends and make length scaling be 1000mm, tolerance is ± 1.0mm.Pack and put in storage, obtained compo pipe performance parameter is in table 1.
Embodiment 10
Novel environment friendly adds a preparation method for antimony high tinalloy pipe, and getting mass percent is 5%Sb (antimony), and 10%Sn (tin), surplus Cu (copper) are placed in main frequency furnace, is heated to 1180 degree and melts rear insulation to 1100 degree completely.After fully being stirred by the alloy liquid melted completely with graphite rod, the high-purity flaky graphite powder that cladding thickness is about 20cm is in the above oxidized to prevent it.Be incubated after 1-1.5 hour, be again warming up to 1200 degree, and open the vibrating device of main frequency furnace, vibration frequency is 1 time/second.Adopting horizontal continuous casting method to be cast as external diameter is 100mm, and internal diameter is 50mm, and length is the alloy pipe of 500mm.With copper ingot milling machine, the alloy pipe of continuous casting is carried out smooth surface process, make its smooth surface be convenient to next step extruding.Tube outer diameter after process is 98mm, internal diameter 51mm, length 500mm.By the heavy wall copper pipe after smooth surface process, carry out the process annealing of 330 degree in box-annealing furnace, annealing time is 45 minutes.Pushed in 1200 tons of extruders by compo pipe after annealing and extrude, extrusion speed is V=0.05 meter per second.Become after repeatedly extruding: external diameter 81mm, internal diameter is 64mm, and length is the tubing of 1050-1100mm.After the compo pipe extruded through previous step is carried out again annealing in process 1-1.5 hour, cool at normal temperatures.With finishing die, compo pipe being carried out last extruding is external diameter 80mm, and tolerance is ± 0.1mm; Internal diameter 65mm, tolerance is ± tubing of 0.1mm, then burr is removed in the cutting of tubing two ends and make length scaling be 1000mm, tolerance is ± 1.0mm.Pack and put in storage, obtained compo pipe performance parameter is in table 1.
Embodiment 11
A kind of novel environment friendly adds the preparation method of antimony high tinalloy pipe, be Sb (antimony): 4-5% according to percetage by weight, Sn (tin): 6-8%, Cu (copper): electricity Xie Tong ﹑ Xi ﹑ antimony is placed in main frequency furnace by the proportioning of surplus, is heated to be incubated to 1150 degree after 1180 degree of-1250 degree melts completely.After fully being stirred by the alloy liquid melted completely with graphite rod, cover high-purity flaky graphite powder in the above and be oxidized to prevent it, thickness is about 22-25cm.After temperature retention time 1.5-2.0 hour, be again warming up to 1250 degree, and open the vibrating device of main frequency furnace, vibration frequency is 1 time/second.Adopting horizontal continuous casting method to be cast as external diameter is 80mm, and internal diameter is 40mm, and length is the alloy pipe of 600mm.With copper ingot milling machine, the alloy pipe of continuous casting is carried out smooth surface process, make its smooth surface be convenient to next step extruding.Tube outer diameter after process is 75mm, internal diameter 43mm, length 600mm.By the heavy wall copper pipe after smooth surface process, carry out the process annealing of 250-300 degree in box-annealing furnace, annealing time is 30-40 minute.Pushed in 1200 tons of extruders by compo pipe after annealing and extrude, extrusion speed is V=0.05 meter per second.Become after repeatedly extruding: external diameter 61mm, internal diameter is 49mm, and length is the tubing of 1100-1200mm.The compo pipe extruded through previous step is carried out again annealing in process 2-3 as a child after, cool at normal temperatures.With finishing die, compo pipe being carried out last extruding is external diameter 60mm, and tolerance is ± 0.1mm; Internal diameter 50mm, tolerance is ± tubing of 0.1mm, then burr is removed in the cutting of tubing two ends and make length scaling be 1050mm, tolerance is ± 1.0mm.Pack and put in storage, obtained compo pipe performance parameter is in table 1.
Embodiment 12
A kind of novel environment friendly adds the preparation method of antimony high tinalloy pipe, be Sb (antimony) according to percetage by weight: 4%, Sn (tin): 6%, Cu (copper): electricity Xie Tong ﹑ Xi ﹑ antimony is placed in main frequency furnace by the proportioning of surplus, is heated to 1180 degree and melts rear insulation to 1150 degree completely.After fully being stirred by the alloy liquid melted completely with graphite rod, cover high-purity flaky graphite powder in the above and be oxidized to prevent it, thickness is about 22-25cm.After temperature retention time 1.5-2.0 hour, be again warming up to 1250 degree, and open the vibrating device of main frequency furnace, vibration frequency is 1 time/second.Adopting horizontal continuous casting method to be cast as external diameter is 80mm, and internal diameter is 40mm, and length is the alloy pipe of 600mm.With copper ingot milling machine, the alloy pipe of continuous casting is carried out smooth surface process, make its smooth surface be convenient to next step extruding.Tube outer diameter after process is 75mm, internal diameter 43mm, length 600mm.By the heavy wall copper pipe after smooth surface process, carry out the process annealing of 250-300 degree in box-annealing furnace, annealing time is 30-40 minute.Pushed in 1200 tons of extruders by compo pipe after annealing and extrude, extrusion speed is V=0.05 meter per second.Become after repeatedly extruding: external diameter 61mm, internal diameter is 49mm, and length is the tubing of 1150mm.The compo pipe extruded through previous step is carried out again annealing in process 2-3 as a child after, cool at normal temperatures.With finishing die, compo pipe being carried out last extruding is external diameter 60mm, and tolerance is ± 0.1mm; Internal diameter 50mm, tolerance is ± tubing of 0.1mm, then burr is removed in the cutting of tubing two ends and make length scaling be 1050mm, tolerance is ± 1.0mm.Pack and put in storage, obtained compo pipe performance parameter is in table 1.
Embodiment 13
A kind of novel environment friendly adds the preparation method of antimony high tinalloy pipe, be Sb (antimony) according to percetage by weight: 5%, Sn (tin): 8%, Cu (copper): electricity Xie Tong ﹑ Xi ﹑ antimony is placed in main frequency furnace by the proportioning of surplus, is heated to 1230 degree and melts rear insulation to 1150 degree completely.After fully being stirred by the alloy liquid melted completely with graphite rod, cover high-purity flaky graphite powder in the above and be oxidized to prevent it, thickness is about 22-25cm.After temperature retention time 1.5-2.0 hour, be again warming up to 1250 degree, and open the vibrating device of main frequency furnace, vibration frequency is 1 time/second.Adopting horizontal continuous casting method to be cast as external diameter is 80mm, and internal diameter is 40mm, and length is the alloy pipe of 600mm.With copper ingot milling machine, the alloy pipe of continuous casting is carried out smooth surface process, make its smooth surface be convenient to next step extruding.Tube outer diameter after process is 75mm, internal diameter 43mm, length 600mm.By the heavy wall copper pipe after smooth surface process, carry out the process annealing of 250-300 degree in box-annealing furnace, annealing time is 30-40 minute.Pushed in 1200 tons of extruders by compo pipe after annealing and extrude, extrusion speed is V=0.05 meter per second.Become after repeatedly extruding: external diameter 61mm, internal diameter is 49mm, and length is the tubing of 1100-1200mm.The compo pipe extruded through previous step is carried out again annealing in process 2-3 as a child after, cool at normal temperatures.With finishing die, compo pipe being carried out last extruding is external diameter 60mm, and tolerance is ± 0.1mm; Internal diameter 50mm, tolerance is ± tubing of 0.1mm, then burr is removed in the cutting of tubing two ends and make length scaling be 1050mm, tolerance is ± 1.0mm.Pack and put in storage, obtained compo pipe performance parameter is in table 1.
Embodiment 14
Get the Sb (antimony) that percetage by weight is 0.2-1%, the Sn (tin) of 9-11%, the Cu (copper) of surplus is placed in main frequency furnace, is heated to be incubated to 1250 degree after 1300 degree of-1350 degree melts completely.After fully being stirred by the alloy liquid melted completely with graphite rod, cover high-purity flaky graphite powder in the above and be oxidized to prevent it, thickness is about 12-15cm.After temperature retention time 1-1.5 hour, be again warming up to 1300 degree, and open the vibrating device of main frequency furnace, vibration frequency is 1 time/second.Adopting horizontal continuous casting method to be cast as external diameter is 75mm, and internal diameter is 40mm, and length is the alloy pipe of 500mm.With copper ingot milling machine, the alloy pipe of continuous casting is carried out smooth surface process, make its smooth surface be convenient to next step extruding.Tube outer diameter after process is 72mm, internal diameter 42mm, length 500mm.By the heavy wall copper pipe after smooth surface process, carry out the process annealing of 350-400 degree in box-annealing furnace, annealing time is 30-60 minute.Pushed in 1200 tons of extruders by compo pipe after annealing and extrude, extrusion speed is V=0.05 meter per second.Become after repeatedly extruding: external diameter 65mm, internal diameter 49mm, length is the tubing of 1050-1100mm.The compo pipe extruded through previous step is carried out again annealing in process 1-1.5 as a child after, cool at normal temperatures.With finishing die, compo pipe being carried out last extruding is external diameter 60mm, and tolerance is ± 0.1mm; Internal diameter 50mm, tolerance is ± tubing of 0.1mm, then burr is removed in the cutting of tubing two ends and make length scaling be 1000mm, tolerance is ± 1.0mm.Pack and put in storage, obtained compo pipe performance parameter is in table 1.
Embodiment 15
Get the Sb (antimony) that percetage by weight is 0.2%, the Sn (tin) of 9%, the Cu (copper) of surplus is placed in main frequency furnace, is heated to 1300 degree and melts rear insulation to 1250 degree completely.After fully being stirred by the alloy liquid melted completely with graphite rod, cover high-purity flaky graphite powder in the above and be oxidized to prevent it, thickness is about 12-15cm.After temperature retention time 1-1.5 hour, be again warming up to 1300 degree, and open the vibrating device of main frequency furnace, vibration frequency is 1 time/second.Adopting horizontal continuous casting method to be cast as external diameter is 75mm, and internal diameter is 40mm, and length is the alloy pipe of 500mm.With copper ingot milling machine, the alloy pipe of continuous casting is carried out smooth surface process, make its smooth surface be convenient to next step extruding.Tube outer diameter after process is 72mm, internal diameter 42mm, length 500mm.By the heavy wall copper pipe after smooth surface process, carry out the process annealing of 350-400 degree in box-annealing furnace, annealing time is 30-60 minute.Pushed in 1200 tons of extruders by compo pipe after annealing and extrude, extrusion speed is V=0.05 meter per second.Become after repeatedly extruding: external diameter 65mm, internal diameter 49mm, length is the tubing of 1050-1100mm.The compo pipe extruded through previous step is carried out again annealing in process 1-1.5 as a child after, cool at normal temperatures.With finishing die, compo pipe being carried out last extruding is external diameter 60mm, and tolerance is ± 0.1mm; Internal diameter 50mm, tolerance is ± tubing of 0.1mm, then burr is removed in the cutting of tubing two ends and make length scaling be 1000mm, tolerance is ± 1.0mm.Pack and put in storage, obtained compo pipe performance parameter is in table 1.
Embodiment 16
Get the Sb (antimony) that percetage by weight is 1%, the Sn (tin) of 11%, the Cu (copper) of surplus is placed in main frequency furnace, is heated to 1350 degree and melts rear insulation to 1250 degree completely.After fully being stirred by the alloy liquid melted completely with graphite rod, cover high-purity flaky graphite powder in the above and be oxidized to prevent it, thickness is about 12-15cm.After temperature retention time 1-1.5 hour, be again warming up to 1300 degree, and open the vibrating device of main frequency furnace, vibration frequency is 1 time/second.Adopting horizontal continuous casting method to be cast as external diameter is 75mm, and internal diameter is 40mm, and length is the alloy pipe of 500mm.With copper ingot milling machine, the alloy pipe of continuous casting is carried out smooth surface process, make its smooth surface be convenient to next step extruding.Tube outer diameter after process is 72mm, internal diameter 42mm, length 500mm.By the heavy wall copper pipe after smooth surface process, carry out the process annealing of 400 degree in box-annealing furnace, annealing time is 30-60 minute.Pushed in 1200 tons of extruders by compo pipe after annealing and extrude, extrusion speed is V=0.05 meter per second.Become after repeatedly extruding: external diameter 65mm, internal diameter 49mm, length is the tubing of 1050-1100mm.The compo pipe extruded through previous step is carried out again annealing in process 1-1.5 as a child after, cool at normal temperatures.With finishing die, compo pipe being carried out last extruding is external diameter 60mm, and tolerance is ± 0.1mm; Internal diameter 50mm, tolerance is ± tubing of 0.1mm, then burr is removed in the cutting of tubing two ends and make length scaling be 1000mm, tolerance is ± 1.0mm.Pack and put in storage, obtained compo pipe performance parameter is in table 1.
Traditional lead element is replaced with antimony element by the present invention, not only increase the environmental-protecting performance of this compo pipe, and heavy alloyed tensile strength can be greatly put forward after repeatedly extruding, alloy rigidity is promoted to 95-160HBS by original 70-80HBS, and improves its wearability.The novel environment friendly that each embodiment obtains above adds antimony high tinalloy pipe performance and sees the following form:
Table 1 novel environment friendly adds antimony high tinalloy pipe performance
The above embodiment only have expressed embodiments of the present invention, and it describes comparatively concrete and detailed, but therefore can not be interpreted as the restriction to the scope of the claims of the present invention.It should be pointed out that for the person of ordinary skill of the art, without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection domain of patent of the present invention should be as the criterion with claims.
Claims (7)
1. environmental protection adds an antimony high tinalloy pipe, it is characterized in that, is made up of the component of following percetage by weight: antimony 5%, tin 8%, and surplus is copper; Described environmental protection is added antimony high tinalloy pipe and is prepared by following steps:
Step one: be placed in main frequency furnace by electricity Xie Tong ﹑ Xi ﹑ antimony according to proportioning, is heated to be incubated to 1100 degree of-1250 degree after 1150 degree of-1350 degree melts completely;
Step 2: after the alloy liquid melted completely fully being stirred with graphite rod, cladding thickness is that the high-purity flaky graphite powder of 12-25cm is oxidized to prevent it in the above;
Step 3: be incubated after 25 minutes to 2 hours, is again warming up to 1200 degree of-1350 degree, and opens the vibrating device of main frequency furnace, vibration frequency is 1 time/second, adopting horizontal continuous casting method to be cast as external diameter is 75mm-105mm, and internal diameter is 40mm-55mm, and length is the alloy pipe of 500mm-600mm;
Step 4: the alloy pipe of continuous casting is carried out smooth surface process with copper ingot milling machine, make its smooth surface be convenient to next step extruding, the tube outer diameter after process is 72mm-100mm, internal diameter 42mm-58mm, length 500mm-600mm;
Step 5: by the heavy wall copper pipe after smooth surface process, in box-annealing furnace, carry out the process annealing of 250 degree of-400 degree, annealing time is 30-60 minute;
Step 6: pushed in 1200 tons of extruders by the compo pipe after annealing and extrude, extrusion speed is V=0.05 meter per second, after repeatedly extruding, become external diameter is 61mm-mm, and internal diameter is 49mm-68mm, and length is the tubing of 1050mm-1200mm;
Step 7: after the compo pipe extruded through previous step is carried out again annealing in process 1-3 hour, cool at normal temperatures;
Step 8: with finishing die, compo pipe being carried out last extruding is external diameter 90mm, and tolerance is ± 0.1mm, internal diameter 50mm-70mm, tolerance is ± tubing of 0.1mm, then burr being removed in the cutting of tubing two ends makes length scaling be 1000mm-1051mm, and tolerance is ± 1.0mm, completes preparation.
2. environmental protection adds an antimony high tinalloy pipe, it is characterized in that, is made up of the component of following percetage by weight: antimony 1%, tin 11%, and surplus is copper; Described environmental protection is added antimony high tinalloy pipe and is prepared by following steps:
Step one: be placed in main frequency furnace by electricity Xie Tong ﹑ Xi ﹑ antimony according to proportioning, is heated to be incubated to 1100 degree of-1250 degree after 1150 degree of-1350 degree melts completely;
Step 2: after the alloy liquid melted completely fully being stirred with graphite rod, cladding thickness is that the high-purity flaky graphite powder of 12-25cm is oxidized to prevent it in the above;
Step 3: be incubated after 25 minutes to 2 hours, is again warming up to 1200 degree of-1350 degree, and opens the vibrating device of main frequency furnace, vibration frequency is 1 time/second, adopting horizontal continuous casting method to be cast as external diameter is 75mm-105mm, and internal diameter is 40mm-55mm, and length is the alloy pipe of 500mm-600mm;
Step 4: the alloy pipe of continuous casting is carried out smooth surface process with copper ingot milling machine, make its smooth surface be convenient to next step extruding, the tube outer diameter after process is 72mm-100mm, internal diameter 42mm-58mm, length 500mm-600mm;
Step 5: by the heavy wall copper pipe after smooth surface process, in box-annealing furnace, carry out the process annealing of 250 degree of-400 degree, annealing time is 30-60 minute;
Step 6: pushed in 1200 tons of extruders by the compo pipe after annealing and extrude, extrusion speed is V=0.05 meter per second, after repeatedly extruding, become external diameter is 61mm-mm, and internal diameter is 49mm-68mm, and length is the tubing of 1050mm-1200mm;
Step 7: after the compo pipe extruded through previous step is carried out again annealing in process 1-3 hour, cool at normal temperatures;
Step 8: with finishing die, compo pipe being carried out last extruding is external diameter 90mm, and tolerance is ± 0.1mm, internal diameter 50mm-70mm, tolerance is ± tubing of 0.1mm, then burr being removed in the cutting of tubing two ends makes length scaling be 1000mm-1051mm, and tolerance is ± 1.0mm, completes preparation.
3. environmental protection adds an antimony high tinalloy pipe, it is characterized in that, is made up of the component of following percetage by weight: antimony 3%, tin 8%, and surplus is copper; Described environmental protection is added antimony high tinalloy pipe and is prepared by following steps:
Step one: be placed in main frequency furnace by electricity Xie Tong ﹑ Xi ﹑ antimony according to proportioning, is heated to be incubated to 1100 degree of-1250 degree after 1150 degree of-1350 degree melts completely;
Step 2: after the alloy liquid melted completely fully being stirred with graphite rod, cladding thickness is that the high-purity flaky graphite powder of 12-25cm is oxidized to prevent it in the above;
Step 3: be incubated after 25 minutes to 2 hours, is again warming up to 1200 degree of-1350 degree, and opens the vibrating device of main frequency furnace, vibration frequency is 1 time/second, adopting horizontal continuous casting method to be cast as external diameter is 75mm-105mm, and internal diameter is 40mm-55mm, and length is the alloy pipe of 500mm-600mm;
Step 4: the alloy pipe of continuous casting is carried out smooth surface process with copper ingot milling machine, make its smooth surface be convenient to next step extruding, the tube outer diameter after process is 72mm-100mm, internal diameter 42mm-58mm, length 500mm-600mm;
Step 5: by the heavy wall copper pipe after smooth surface process, in box-annealing furnace, carry out the process annealing of 250 degree of-400 degree, annealing time is 30-60 minute;
Step 6: pushed in 1200 tons of extruders by the compo pipe after annealing and extrude, extrusion speed is V=0.05 meter per second, after repeatedly extruding, become external diameter is 61mm-mm, and internal diameter is 49mm-68mm, and length is the tubing of 1050mm-1200mm;
Step 7: after the compo pipe extruded through previous step is carried out again annealing in process 1-3 hour, cool at normal temperatures;
Step 8: with finishing die, compo pipe being carried out last extruding is external diameter 90mm, and tolerance is ± 0.1mm, internal diameter 50mm-70mm, tolerance is ± tubing of 0.1mm, then burr being removed in the cutting of tubing two ends makes length scaling be 1000mm-1051mm, and tolerance is ± 1.0mm, completes preparation.
4. environmental protection adds an antimony high tinalloy pipe, it is characterized in that, is made up of the component of following percetage by weight: antimony 4%, tin 8%, and surplus is copper; Described environmental protection is added antimony high tinalloy pipe and is prepared by following steps:
Step one: be placed in main frequency furnace by electricity Xie Tong ﹑ Xi ﹑ antimony according to proportioning, is heated to be incubated to 1100 degree of-1250 degree after 1150 degree of-1350 degree melts completely;
Step 2: after the alloy liquid melted completely fully being stirred with graphite rod, cladding thickness is that the high-purity flaky graphite powder of 12-25cm is oxidized to prevent it in the above;
Step 3: be incubated after 25 minutes to 2 hours, is again warming up to 1200 degree of-1350 degree, and opens the vibrating device of main frequency furnace, vibration frequency is 1 time/second, adopting horizontal continuous casting method to be cast as external diameter is 75mm-105mm, and internal diameter is 40mm-55mm, and length is the alloy pipe of 500mm-600mm;
Step 4: the alloy pipe of continuous casting is carried out smooth surface process with copper ingot milling machine, make its smooth surface be convenient to next step extruding, the tube outer diameter after process is 72mm-100mm, internal diameter 42mm-58mm, length 500mm-600mm;
Step 5: by the heavy wall copper pipe after smooth surface process, in box-annealing furnace, carry out the process annealing of 250 degree of-400 degree, annealing time is 30-60 minute;
Step 6: pushed in 1200 tons of extruders by the compo pipe after annealing and extrude, extrusion speed is V=0.05 meter per second, after repeatedly extruding, become external diameter is 61mm-mm, and internal diameter is 49mm-68mm, and length is the tubing of 1050mm-1200mm;
Step 7: after the compo pipe extruded through previous step is carried out again annealing in process 1-3 hour, cool at normal temperatures;
Step 8: with finishing die, compo pipe being carried out last extruding is external diameter 90mm, and tolerance is ± 0.1mm, internal diameter 50mm-70mm, tolerance is ± tubing of 0.1mm, then burr being removed in the cutting of tubing two ends makes length scaling be 1000mm-1051mm, and tolerance is ± 1.0mm, completes preparation.
5. environmental protection adds an antimony high tinalloy pipe, it is characterized in that, is made up of the component of following percetage by weight: antimony 5%, tin 10%, and surplus is copper; Described environmental protection is added antimony high tinalloy pipe and is prepared by following steps:
Step one: be placed in main frequency furnace by electricity Xie Tong ﹑ Xi ﹑ antimony according to proportioning, is heated to be incubated to 1100 degree of-1250 degree after 1150 degree of-1350 degree melts completely;
Step 2: after the alloy liquid melted completely fully being stirred with graphite rod, cladding thickness is that the high-purity flaky graphite powder of 12-25cm is oxidized to prevent it in the above;
Step 3: be incubated after 25 minutes to 2 hours, is again warming up to 1200 degree of-1350 degree, and opens the vibrating device of main frequency furnace, vibration frequency is 1 time/second, adopting horizontal continuous casting method to be cast as external diameter is 75mm-105mm, and internal diameter is 40mm-55mm, and length is the alloy pipe of 500mm-600mm;
Step 4: the alloy pipe of continuous casting is carried out smooth surface process with copper ingot milling machine, make its smooth surface be convenient to next step extruding, the tube outer diameter after process is 72mm-100mm, internal diameter 42mm-58mm, length 500mm-600mm;
Step 5: by the heavy wall copper pipe after smooth surface process, in box-annealing furnace, carry out the process annealing of 250 degree of-400 degree, annealing time is 30-60 minute;
Step 6: pushed in 1200 tons of extruders by the compo pipe after annealing and extrude, extrusion speed is V=0.05 meter per second, after repeatedly extruding, become external diameter is 61mm-mm, and internal diameter is 49mm-68mm, and length is the tubing of 1050mm-1200mm;
Step 7: after the compo pipe extruded through previous step is carried out again annealing in process 1-3 hour, cool at normal temperatures;
Step 8: with finishing die, compo pipe being carried out last extruding is external diameter 90mm, and tolerance is ± 0.1mm, internal diameter 50mm-70mm, tolerance is ± tubing of 0.1mm, then burr being removed in the cutting of tubing two ends makes length scaling be 1000mm-1051mm, and tolerance is ± 1.0mm, completes preparation.
6. environmental protection adds an antimony high tinalloy pipe, it is characterized in that, is made up of the component of following percetage by weight: antimony 4%, tin 6%, and surplus is copper; Described environmental protection is added antimony high tinalloy pipe and is prepared by following steps:
Step one: be placed in main frequency furnace by electricity Xie Tong ﹑ Xi ﹑ antimony according to proportioning, is heated to be incubated to 1100 degree of-1250 degree after 1150 degree of-1350 degree melts completely;
Step 2: after the alloy liquid melted completely fully being stirred with graphite rod, cladding thickness is that the high-purity flaky graphite powder of 12-25cm is oxidized to prevent it in the above;
Step 3: be incubated after 25 minutes to 2 hours, is again warming up to 1200 degree of-1350 degree, and opens the vibrating device of main frequency furnace, vibration frequency is 1 time/second, adopting horizontal continuous casting method to be cast as external diameter is 75mm-105mm, and internal diameter is 40mm-55mm, and length is the alloy pipe of 500mm-600mm;
Step 4: the alloy pipe of continuous casting is carried out smooth surface process with copper ingot milling machine, make its smooth surface be convenient to next step extruding, the tube outer diameter after process is 72mm-100mm, internal diameter 42mm-58mm, length 500mm-600mm;
Step 5: by the heavy wall copper pipe after smooth surface process, in box-annealing furnace, carry out the process annealing of 250 degree of-400 degree, annealing time is 30-60 minute;
Step 6: pushed in 1200 tons of extruders by the compo pipe after annealing and extrude, extrusion speed is V=0.05 meter per second, after repeatedly extruding, become external diameter is 61mm-mm, and internal diameter is 49mm-68mm, and length is the tubing of 1050mm-1200mm;
Step 7: after the compo pipe extruded through previous step is carried out again annealing in process 1-3 hour, cool at normal temperatures;
Step 8: with finishing die, compo pipe being carried out last extruding is external diameter 90mm, and tolerance is ± 0.1mm, internal diameter 50mm-70mm, tolerance is ± tubing of 0.1mm, then burr being removed in the cutting of tubing two ends makes length scaling be 1000mm-1051mm, and tolerance is ± 1.0mm, completes preparation.
7. environmental protection adds an antimony high tinalloy pipe, it is characterized in that, is made up of the component of following percetage by weight: antimony 0.2%, tin 9%, and surplus is copper; Described environmental protection is added antimony high tinalloy pipe and is prepared by following steps:
Step one: be placed in main frequency furnace by electricity Xie Tong ﹑ Xi ﹑ antimony according to proportioning, is heated to be incubated to 1100 degree of-1250 degree after 1150 degree of-1350 degree melts completely;
Step 2: after the alloy liquid melted completely fully being stirred with graphite rod, cladding thickness is that the high-purity flaky graphite powder of 12-25cm is oxidized to prevent it in the above;
Step 3: be incubated after 25 minutes to 2 hours, is again warming up to 1200 degree of-1350 degree, and opens the vibrating device of main frequency furnace, vibration frequency is 1 time/second, adopting horizontal continuous casting method to be cast as external diameter is 75mm-105mm, and internal diameter is 40mm-55mm, and length is the alloy pipe of 500mm-600mm;
Step 4: the alloy pipe of continuous casting is carried out smooth surface process with copper ingot milling machine, make its smooth surface be convenient to next step extruding, the tube outer diameter after process is 72mm-100mm, internal diameter 42mm-58mm, length 500mm-600mm;
Step 5: by the heavy wall copper pipe after smooth surface process, in box-annealing furnace, carry out the process annealing of 250 degree of-400 degree, annealing time is 30-60 minute;
Step 6: pushed in 1200 tons of extruders by the compo pipe after annealing and extrude, extrusion speed is V=0.05 meter per second, after repeatedly extruding, become external diameter is 61mm-mm, and internal diameter is 49mm-68mm, and length is the tubing of 1050mm-1200mm;
Step 7: after the compo pipe extruded through previous step is carried out again annealing in process 1-3 hour, cool at normal temperatures;
Step 8: with finishing die, compo pipe being carried out last extruding is external diameter 90mm, and tolerance is ± 0.1mm, internal diameter 50mm-70mm, tolerance is ± tubing of 0.1mm, then burr being removed in the cutting of tubing two ends makes length scaling be 1000mm-1051mm, and tolerance is ± 1.0mm, completes preparation.
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