CN103230961A - Copper alloy pipe and manufacturing method thereof - Google Patents
Copper alloy pipe and manufacturing method thereof Download PDFInfo
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Abstract
The invention provides a copper alloy pipe and a manufacturing method thereof. The manufacturing method of the copper alloy pipe comprises the following steps of: step 101, extruding a heated copper alloy casting blank to obtain a copper alloy pipe blank of which the pipe wall is 10mm-40mm thick; step 104, sending the extruded copper alloy pipe blank in a red hot state into a planetary pipe mill to be subjected to single pass rolling to obtain a copper alloy pipe coil, wherein the rolling speed is controlled to be between 4m/min and 40m/min and the percentage reduction of area is controlled to be between 50% to 95%; and step 105, performing the subsequent processing of any one or combination of stretching, molding, annealing or finishing on the copper alloy pipe coil to manufacture the copper alloy finished product. According to the manufacturing method of the copper alloy pipe, the advantages of extruding and rolling are organically combined, and one-time heating realizes two-time heat processing, so that the manufacturing method has the advantages of few procedures, high production efficiency, energy conservation, low cost and stable quality of the pipe material product.
Description
Technical field
The present invention relates to the metal pipe material manufacture field, in particular to a kind of manufacture method of copper alloy tube, and the copper alloy tube that adopts this manufacture method to make.
Background technology
In the prior art, the manufacture method of copper alloy tube mainly contains two kinds of extrusion and casting and roll processes.
---extruding------drawing---heat treatment (surface treatment)---packing that the Pilger milling train is cold rolling that a kind of is copper alloy tube " extrusion ", and its technological process is: semi-continuous casting.
There is following problem in this processing method: the tubing after the extruding does not often reach the final size requirement, needs to carry out tube reducing and subtract wall processing with pilgrim rolling machine or drawbench.This processing is cold working, both cold rolling or cold-drawn.But the intensity height of metal during cold working, resistance of deformation is much higher than the hot-working of metal, so compare with hot-working, cold worked single pass deformation rate is low, production efficient is low, often needs to be several times as much as hot worked processing passage and just can finish same metal strain; In addition, " extruding-Pilger is rolling " all is straight tube production, generally is difficult to process the overlength pipe, unless adopt the super-tonnage extruder, otherwise be difficult to adopt the high disc type mode of production of efficient, this also is one of factor that influences production efficiency.The use cold working that " extrusion " is too much causes that production efficiency is low, lumber recovery is lower and problem such as cost height, is the greatest problem that exists in the copper alloy tube production.
Another kind is that the patent No. is " CN88101739 ", and name is called in the document of " pipe, rod and the manufacture method of being with ", discloses a kind of production method of new copper pipe, i.e. so-called " casting and roll process ".This method is the hollow copper base of continuous casting pipe at room temperature directly to be sent into the PSW three-roller planetary rolling mill carry out the rolling of single pass aximal deformation value.The internal friction that utilizes the reduction of copper pipe base area and material deformation to produce, make the copper pipe base under the temperature conditions that is warmed up to 250 ℃～700 ℃ (being more than the recrystallization initial temperature of respective material), carry out the rolling a kind of more advanced production method at present of copper pipe processing.Compare with above-mentioned " extrusion ", should " casting and roll process " have that operation is few, cost is low and the lumber recovery advantages of higher.This method has obtained great success at the manufacture field of copper tube in nearest 20 years.
The immense success that reference " casting and roll process " obtains at copper tube, engineers in this area wishes it is generalized to the copper alloy tube manufacture field very much, and the hollow copper alloy pipes such as brass, bronze and copper-nickel alloy that hope can be adopted casting produce various copper alloy tubes through the planetary rolling machine is rolling.For this reason, people have done a large amount of work, local or whole heating before rolling as the copper alloy hollow bloom to casting, the casting pipe is carried out electromagnetic agitation when the casting begin the parameter etc. of nipping when rolling with crystal grain thinning, control milling train, the patent No. is the patent documentation of " CN02138022 ", " CN03149786 ", " CN200410010338 ", " CN200510134628 ", " CN200910153349 " and " CN201010224476 ", has recorded work and the imagination of engineers.
But even to this day, adopt " casting and roll process " production of copper compo pipe all to fail to succeed, concrete reason is mainly as follows:
1, it is thick because of crystal grain when rolling to compare the hollow copper alloy pipe of casting with red copper, and crystal boundary is very easy to cracking, is difficult to set up stable as-rolled condition, rolls back structural constituent inequality, the surfaces externally and internally crack defect is many.
Various defectives such as crackle, shrinkage cavity, segregation are contained in the cast sturcture of copper alloy pipe, and these defectives might be repaired in the process of back passage, also might be retained or amplify.When adopting " casting and roll process " to produce copper tube, the planetary rolling of the various defectives process heavy reductions on the casting pipe has also obtained repairing completely and seam under deformed area high temperature, high pressure, thereby has produced this new copper pipe manufacture method.And when same method used copper alloy tube rolling, the copper alloy pipe was very easy to cracking because of the crystal boundary of thick columnar grain in rolling, cause setting up stable as-rolled condition.Although the copper alloy pipe has also been made blank method such as heat in advance, when rolling, can there be a lot of defectives because of the crystal particle crystal boundary cracking after causing copper alloy tube to roll.This is the main cause that all the time adopts " casting and roll process " manufactured copper compo pipe to fail to achieve success.Measures such as employing electromagnetic agitation have certain help to reducing cracking, but can not fundamentally solve the cracking problem, and cost significantly increases.
2, copper alloy deformation rate and temperature rise when carrying out planetary rolling is not enough, causes existing manufacturing defect.
Compare with red copper, copper alloy has bigger resistance of deformation, lower plasticity.When adopting planetary rolling, be difficult to reach as red copper high deformation rate and temperature rise, be difficult to the temperature in steady-state deformation district.For yielding to the performance of milling train, often during rolling copper alloy, rolling specs is much smaller than the section of red copper, and this but causes rolling temperature not enough, pipe and rolling in the defective that produces can not be by seam, elimination in the deformed area.
3, the part copper alloy has the hot-working brittle zone, and conventional low temperature casting is difficult to avoid its work brittleness district.
Some copper alloys, as brass, in the time of 400 ℃～600 ℃, it is the work brittleness district, and the deformed area temperature of planetary rolling is that room temperature (or being higher than room temperature) from the porch is to the high temperature continuous distributed in exit, if the defective that produces in the brittleness temperature district can not get seam before distortion finishes, defective will exist always.
Up to the present, above-mentioned manufacturing deficiency problem to copper alloy tube is never solved well, finding the processing technology of the copper alloy tube that a kind of operation is few, lumber recovery is high, production efficiency is high, pipe workpiece quality is good, simple, is the technical problem of needing solution badly.
Summary of the invention
For solving the problems of the technologies described above, the invention provides a kind of manufacture method of new copper alloy tube, to push with two kinds of methods of planetary rolling and combine, take full advantage of hot worked superiority, once twice hot-working is finished in heating, advantage such as have that operation is few, lumber recovery is high, production efficiency is high, obvious energy conservation, low cost of manufacture, tubing quality of item are stable.
In view of this, the invention provides a kind of manufacture method of copper alloy tube, may further comprise the steps:
In this technical scheme, add hot extrusion copper alloy strand earlier, the copper alloy pipe that will have high temperature red heat state after will pushing again carries out single planetary rolling to time aximal deformation value, finish pipe extruding and twice hot-working of planetary rolling with once heating, i.e. " heating once and rolling ", the present invention is energy savings effectively, reduces cost, and reduces manufacturing procedure, enhances productivity; Carry out one-pass roller with the planetary rolling machine, come the controlled rolling temperature by controlled rolling speed and the contraction percentage of area, and then realize high-quality rolling to the copper alloy pipe; Rolling back is carried out different subsequent treatment, thereby is obtained the high-quality finished product according to the unlike material of pipe.
Preferably, between described step 101 and step 104, also comprise: step 103, to through before the described copper alloy pipe that obtains after the step process carry out temperature adjusting.
According to different copper alloy pipe properties of materials, in the rolling trip temperature regulation and control of advancing, the inlet temperature when the control pipe enters pipe mill is guaranteed rolling temperature, to guarantee the final performance of product selectively.
For the wide Cu alloy material of part hot rolling temperature range, corresponding copper alloy pipe, the temperature of the nature that has after its extruding can reach the requirement of rolling temperature, namely reaches described red heat state, do not need to carry out again temperature adjusting and handle, directly send in the planetary rolling machine and be rolled; The copper alloy pipe narrower to other hot-rolled temperature scope, the state of temperature of extruding back nature does not reach the hot-rolled temperature requirement, then it is carried out described temperature adjusting, thereby guarantees the quality of manufactured goods.
Preferably, described temperature adjusting comprises that online adjustment, off-line temperature are regulated or samming is handled.
Online adjustment is saved process time, and off-line temperature is regulated or samming is handled and can be carried out in special heat tracing stove, and the adjustment better effects if according to unlike material and the different requirement of pipe, is selected suitable temperature adjusting mode for use.
Preferably, between described step 101 and step 103, also comprise: step 102, the described copper alloy pipe that obtains after handling through described step 101 is carried out tube reducing handle.
In some cases, owing to the extruding machine punching pin can not be too little reason, pipe specification after the extruder extruding can not satisfy the dimensional requirement of the rolling pipe of planetary rolling machine, need carry out hot tube reducing to the pipe after the extruding this moment and handle, to obtain being fit to the rolling dimensions of planetary rolling machine.
Preferably, to the process of described step 104, carry out inert gas shielding in described step 101.
Carry out inert gas shielding, prevent from heating, extruding, tube reducing, temperature adjusting and/or the operation of rolling, oxidation taking place, further guarantee the quality of manufactured goods.
Further, the red heat state of described copper alloy pipe is the scope of temperature between 250 to 990 ℃.
The temperature that the control pipe enters pipe mill can be guaranteed the rolling temperature of deformed area in 250 to 990 ℃ of scopes, guarantee that rolling back tubing has good performance.Skilled in the art will recognize that: the object rubescent state that is heated is called the red heat state, and among the present invention, the copper alloy that has is yielding, the processing resistance is little, and the temperature range when entering the planetary rolling machine can be wideer, and namely the extruding back can directly be rolled without temperature adjustment; Some copper alloy is narrow to the rolling temperature area requirement, need carry out temperature adjustment accurately and just can be rolled.
Preferably, in described step 104, by controlled rolling speed, the contraction percentage of area, intensity of cooling when rolling, make the rolling temperature of described copper alloy pipe in described planetary rolling machine remain on the recrystallization temperature of described copper alloy.
Rolling temperature has material impact to the processing quality of pipe, can be by controlled rolling speed, the contraction percentage of area and the intensity of cooling when rolling, guarantee that the rolling temperature of pipe is higher than the recrystallization temperature of pipe, guarantee deformed area generation dynamic recrystallization, obtain recrystallized structure completely after rolling.
Preferably, in described step 104, adopt emulsion to cool off when rolling; Control described rolling temperature control between 600 ℃ to 990 ℃; The planetary rolling machine that described planetary rolling machine is the 2-6 roller.
For keeping rolling temperature (temperature of metal in the deformed area is exactly the rolling temperature of metal) more than the recrystallization temperature of copper alloy, need the control intensity of cooling in the operation of rolling, adopting 2-6 roller planetary rolling machine that the copper alloy pipe is carried out the rolling of single pass heavy reduction, is temperature adjusting scope preferably between 600 ℃ to 990 ℃ with rolling temperature control.
Preferably, in described step 104, the pipe fitting after the one-pass roller of described planetary rolling machine is cooled off or cooling naturally at room temperature fast.
Can carry out subsequent handlings such as coil pipe, packing after the cooling, on the modern production line of serialization, for enhancing productivity, generally be provided with cooling bath, the pipe fitting that goes out pipe mill is cooled off fast, and adopt the water-bath cooling mostly, cost is low, pollution-free.
The present invention also provides a kind of copper alloy tube, adopts the manufacture method of the described copper alloy tube of above-mentioned each technical scheme to make.This copper alloy tube is superior in quality, and is suitable for follow-up reprocessing processing under the situation that need not to anneal, and can be made into the high-quality copper alloy finished product tubing of different size.
To sum up, manufacture method of the present invention has following main feature:
The first, can squeeze out the tiny heavy wall pipe of crystal grain.
Send into extruder after the solid or hollow copper alloy strand of casting heated by extrusion process requirements and carry out hot extrusion, extruder outlet is the heavy wall copper alloy tube.It is rolling that this heavy wall copper alloy tube is that the planetary rolling machine that is fit to the back passage carries out the single pass aximal deformation value dimensionally, and but the light-wall pipe of the heavy wall copper alloy tube of this extrusion modling and routine extruding compares and can obtain the heavy production overlength of bigger single tube base pipe, can improve working (machining) efficiency.
Because high temperature, three-dimensional compressive stress and aximal deformation value during extruding make the fragmentation of casting crystal grain and finish recrystallization, therefore the copper alloy pipe institutional framework densification after the extruding, surface or internal flaw are seldom arranged, its metallographic structure changes the fine isometric crystal grains of recrystallized structure into by the coarse grain of cast sturcture, is fit to very much the processing of postorder.
The second, optionally the temperature of the heavy wall pipe that extruding is obtained is carried out temperature adjusting and dimensions regulation and control.
To carry out that temperature control makes its maintenance or obtain the red heat state be the key measure that guarantees the final products performance to entering heavy wall pipe before the planetary rolling machine, and this temperature controlling of different copper alloys is different.
For the wideer copper alloy of some hot-rolled temperature scopes, can not make the temperature adjusting that adds, utilize the state of temperature of nature on the heavy wall pipe of extruding back directly to enter the planetary rolling machine and be rolled and get final product;
For other some to the relatively stricter copper alloy of hot-rolled temperature area requirement, to carry out temperature adjusting to the heavy wall copper alloy tube after the extruding, this regulation and control can be carried out online adjustment in the exit of extruder or the import department of planetary rolling machine, also the heavy wall copper alloy tube after the extruding can be sent into the adjustment or the samming that carry out off-line in the special heat tracing stove and handle.
The 3rd, adopt planetary rolling machine single pass aximal deformation value rolling.
Adopt the planetary rolling machine of 2-6 roller that the heavy wall pipe after pushing is carried out the rolling of single pass heavy reduction, inlet temperature when entering the planetary rolling machine by the control pipe, contraction percentage of area when rolling, mill speed and intensity of cooling, the controlled rolling temperature is between 600 ℃-990 ℃.
The planetary rolling machine is a kind of pipe mill of heavy reduction, and the contraction percentage of area of its single pass can reach more than 70%.It is hot that so big single pass heavy deformation can produce sizable distortion, makes to be rolled metal temperature in the deformed area and be raised to it more than recrystallization temperature, forms so-called hot rolling.For guaranteeing rolled metal generation dynamic recrystallization, rolled the rolling temperature of metal in the deformed area and should be surpassed metal recrystallization initial temperature, for copper alloy, the scope of this temperature is generally between 600-990 ℃.Consider the factor of wishing to obtain better recrystallized structure and will avoid red brittleness temperature two aspects of copper alloy, the ideal range of rolling temperature should be between 700-990 ℃, and this temperature range is different according to not being both of concrete copper alloy, and reaching this temperature range is to guarantee to roll the important assurance that rear tubular member has premium properties.
The present invention sends the heavy wall pipe after extruding into the planetary rolling machine and carries out one-pass roller, the rolling tubing that is rolled that makes of planetary rolling machine single pass heavy reduction produces rapid temperature rise in the deformed area, drafts is more big, and mill speed is more fast, and this temperature rise is just more high.For keeping rolling temperature desirable in the deformed area, to spray water or spray emulsion etc. the deformed area generally speaking and cool off, the inlet temperature of control pipe, the contraction percentage of area when rolling, roll speed and intensity of cooling, make temperature stabilization in the tubing deformed area in 600-990 ° of C scope, the quilt of this moment rolls metal and has lower resistance of deformation and better ductility, pipe fitting after rolling has good recrystallized structure, makes final products have the favorable mechanical performance.
In addition, obtain good surface appearance and quality for making tubing, need carry out inert gas shieldings such as nitrogen to tubing.
The 4th, copper alloy tube through after one or several method processing are handled in follow-up stretching, annealing or the moulding, becomes vendible finished product by market demand.
As seen, adopt the manufacture method of copper alloy tube provided by the present invention, have following advantage at least:
1, can produce high-quality copper alloy tube.
The copper alloy tube kind is numerous, brass tube, and White Copper Tubes and bronze tube are widely used in all trades and professions.
The inventive method fully combines the advantage of extruding and two kinds of hot-working methods of planetary rolling, can produce high-quality copper alloy tube.
Copper alloy pipe after the extruding, metallographic structure becomes the processing attitude by the casting attitude, organizes finer and closely, does not almost have defectives such as shrinkage cavity and crackle, and it is rolling to adopt this pipe to carry out the planetary rolling machine, and the defective of rolling back tubing is extremely low.
Can eliminate segregation phenomena in the copper alloy strand by adding hot extrusion, planet hot rolling subsequently makes the tissue after rolling have the tissue of dynamic recrystallization.What this tissue was particularly suitable for the back passage subtracts the processing of wall, tube reducing, the final products that easier acquisition is high-quality.And traditional extrusion is carried out Pilger after extruding cold rolling, and rolling the back tissue is unmanageable work hardening tissue.
2, efficient, energy-conservation, low-cost, and can carry out disc type production.
Extruder and planetary rolling machine all have high production efficiency, adopt the large-tonnage extruder, and the combination of planetary rolling machine and plate drawing machine can be made the heavy copper alloy coil pipe of big ingot.Adopt disc type production can obtain high efficiency, high yield and low cost.The present invention adopts once heating to finish extruding and twice hot-working of planetary rolling in addition, and both " heating once and rolling ", effectively energy savings reduces cost.
In sum, the manufacture method of copper alloy tube provided by the invention, extruding is in the same place with the advantages of rolling two kinds of methods, take full advantage of the superiority of hot-working method, heating once and rolling, advantage such as have compared with prior art that operation is few, lumber recovery is high, production efficiency is high, obvious energy conservation, low cost of manufacture, tubing quality of item are stable.
Description of drawings
Fig. 1 is the FB(flow block) according to an embodiment of the manufacture method of copper alloy tube of the present invention;
Fig. 2 is the FB(flow block) according to the another embodiment of the manufacture method of copper alloy tube of the present invention;
Fig. 3 is the FB(flow block) of an embodiment again according to the manufacture method of copper alloy tube of the present invention.
The specific embodiment
In order more to be expressly understood above-mentioned purpose of the present invention, feature and advantage, below in conjunction with the drawings and specific embodiments the present invention is further described in detail.
A lot of details have been set forth in the following description so that fully understand the present invention; but; the present invention can also adopt other to be different from mode described here and implement, and therefore, protection scope of the present invention is not subjected to the restriction of following public specific embodiment.
As shown in Figure 1, the invention provides a kind of manufacture method of copper alloy tube, may further comprise the steps:
Step 101 is pushed the copper alloy strand after the heating, obtains pipe thickness and be 10 millimeters to 40 millimeters copper alloy pipe;
Step 104 is sent into extruding back and the described copper alloy pipe that is in the red heat state and is carried out one-pass roller in the planetary rolling machine, controlled rolling speed between 4m/min to 40m/min, the contraction percentage of area between 50% to 95%, obtain copper alloy coil pipe;
In this technical scheme, finish extruding and twice hot-working of planetary rolling with heating once, i.e. heating once and rolling, effectively energy savings reduces cost, and manufacturing procedure is few, production efficiency is high; The pipe thickness of the pipe after the extruding is 10 millimeters to 40 millimeters, the heavy wall of this extrusion modling is compared with the thin-walled of routine extruding, can obtain bigger single tube base and weigh, can make long tube, improve working (machining) efficiency, be fit to the rolling of planetary rolling machine single pass heavy reduction; Carry out one-pass roller with the planetary rolling machine, come the controlled rolling temperature by controlled rolling speed and the contraction percentage of area, make the rolling temperature of pipe be higher than the recrystallization initial temperature of pipe, obtaining good recrystallized structure, and then realize high-quality rolling to the copper alloy pipe; Rolling back is carried out different subsequent treatment, thereby is obtained the high-quality finished product according to the unlike material of pipe.
Preferably, as shown in Figure 2, between described step 101 and step 104, also comprise: step 103, to through before the described copper alloy pipe that obtains after the step process carry out temperature adjusting.
So-called " red heat state " is technical term well known to those skilled in the art, i.e. the object rubescent state that is heated.
According to the characteristic of different copper alloy tubes, in the rolling trip temperature regulation and control of advancing, the inlet temperature when the control pipe enters pipe mill is guaranteed rolling temperature, to guarantee the final performance of product selectively.Namely when entering the planetary rolling machine, can reach rolling requirement to the temperature of part copper alloy pipe stock, namely described red heat state is handled with regard to no longer carrying out temperature adjusting, directly sends in the planetary rolling machine to be rolled; Part copper alloy pipe stock temperature before entering the planetary rolling machine is not reached requirement, then it is carried out described temperature adjusting, thereby guarantee the quality of manufactured goods.
Preferably, described temperature adjusting comprises that online adjustment, off-line temperature are regulated or samming is handled.
Online adjustment is saved process time, and off-line temperature is regulated or samming is handled and can be carried out in special heat tracing stove, and the adjustment better effects if according to unlike material and the different demand of pipe, is selected suitable temperature adjusting mode for use.
Preferably, as shown in Figure 3, between described step 101 and step 103, also comprise: step 102, the described copper alloy pipe that obtains after handling through described step 101 is carried out tube reducing handle.
In some cases, the pipe specification after the extruder extruding can not directly be sent into the planetary rolling machine and be rolled, and need carry out tube reducing to the pipe after the extruding this moment and handle, to obtain being fit to the rolling dimensions of planetary rolling machine.
Preferably, to the process of described step 104, carry out inert gas shielding in described step 101.
Carry out inert gas shielding, prevent in heating, extruding, temperature adjusting and the operation of rolling, the quality of manufactured goods is further guaranteed in pipe generation oxidation.
Preferably, described red heat state is the state of temperature between 250 to 990 ℃.
The temperature that the control pipe enters pipe mill can be guaranteed the rolling temperature of deformed area in 250 to 990 ℃ of scopes, guarantee that rolling back tubing has good performance.Skilled in the art will recognize that: the object rubescent state that is heated is called the red heat state, and among the present invention, some copper alloy is yielding, the processing resistance is little, the hot-rolled temperature wide ranges, and this class alloy extruding back can directly be rolled without temperature adjustment; Some copper alloy is narrow to the rolling temperature area requirement, need carry out temperature adjustment accurately and just can be rolled.
In above-mentioned arbitrary embodiment, preferably, in described step 104, by controlled rolling speed, the contraction percentage of area, intensity of cooling when rolling, make the rolling temperature of described copper alloy pipe in described planetary rolling machine remain on the recrystallization temperature of described copper and copper alloy.
Rolling temperature has material impact to the processing quality of pipe, can guarantee that the rolling temperature of pipe is higher than the recrystallization temperature of pipe, guarantees to obtain better dynamic recrystallized structure by controlled rolling speed, the contraction percentage of area and the intensity of cooling when rolling.
Preferably, in described step 104, adopt emulsion to cool off when rolling; Control described rolling temperature control between 600 ℃ to 990 ℃; The planetary rolling machine that described planetary rolling machine is the 2-6 roller.
For keeping rolling temperature more than the recrystallization temperature of pipe, in the operation of rolling, need the control intensity of cooling sometimes; 2-6 roller planetary rolling machines of employing are fit to the copper alloy pipe is carried out the rolling of single pass heavy reduction; It is better temperature range between 600 ℃ to 990 ℃ that rolling temperature is controlled, and is preferred version.
In above-mentioned arbitrary embodiment, preferably, in described step 104, the pipe fitting after the one-pass roller of described planetary rolling machine is cooled off or cooling naturally at room temperature fast.
On the modern production line of serialization, for enhancing productivity, generally be provided with cooling bath, the pipe fitting that goes out milling train is cooled off fast, and adopt the water-bath cooling mostly, cost is low, pollution-free, certainly can also select other the type of cooling according to actual needs.
The present invention also provides a kind of copper alloy tube, and the employing as above manufacture method of the described copper alloy tube of each technical scheme is made.This copper alloy tube is superior in quality, and is suitable for follow-up reprocessing processing under the situation that need not to anneal, and can be made into the high-quality copper alloy finished product tubing of different size.
Describe below in conjunction with the manufacture method of concrete production instance to copper alloy tube of the present invention:
Embodiment one: a preferred embodiment of the present invention is: make the BFe10-1-1 pipe.Rollingly carry out at XR-JSG90 three-roller planetary pipe mill.Blank pushes through 3000 tons of extruders, and extrusion temperature is 900 ℃, is of a size of Φ 85 * 18mm after the extruding, and the temperature of pipe is 650 ° when sending into three-roller planetary rolling mill.Pipe mill is that 12-20m/min carries out work with the rolling speed, pipe is warmed up to about 800 ℃ after entering the deformed area very soon, be that rolling temperature is about 800 ℃, and constantly rolling copper alloy tube is sent to forward in the emulsion bath of long 1.5m, rolling pipe fitting is approximately realized cooling fast by the emulsion bath in the time in 5 seconds, be bent upwards rolling then, through the coiler coil pipe.The specification of the copper alloy tube after rolling is Φ 48 * 2.3mm, and its contraction percentage of area is 91.3%, makes the surface of pipe and does not have any folding pattern and other defect existence, and tensile strength and percentage elongation are respectively 295MPa～310MPa and 25%～30%.Rolling back tubing can be stretched to finished size without intermediate annealing always, as the coil pipe of Φ 9.52 * 0.5mm.Finished product is checked through eddy current inspection, and the result reflects that every km only is 3～5 defect points.Rolling back tubing is best in quality, and manufacturing is successful.
Embodiment two: another preferred embodiment of the present invention is: make the HSn70-1 brass tube.Blank pushes through 2200 tons of extruders, and extrusion temperature is 750 ℃, is of a size of Φ 80 * 14mm after the extruding, and hot tube reducing imports in the XR-JSG60 three-roller planetary pipe mill subsequently to external diameter Φ 60mm. soaking to 700 ℃ in the electrical heating soaking pit then.Thereafter rolling described as above-described embodiment one, its rolling temperature is about 830 ℃, and mill speed is 10m/min, and the brass tube specification after rolling is Φ 40 * 2.0mm, and the contraction percentage of area is 88.1%.The brass tube no any folding pattern in surface and other defective after making, its tensile strength and percentage elongation are respectively 320MPa～380MPa and 25%～40%, and Electronic Speculum shows that the metallographic structure of rolling the back body is very fine and close, and grain size is 15～40 microns.Technology is successful.This copper alloy tube does not almost cause the generation of disconnected pipe phenomenon because of the defective of body itself in follow-up stretching.
Embodiment three: another preferred embodiment of the present invention is: make the H85 brass tube.Pipe pushes through 3000 tons of extruders; extrusion temperature is 920 ℃; be of a size of Φ 90 * 20mm after the extruding, utilize the condition of high temperature of the nature that brass tube has after pushing, directly under protection of nitrogen gas, import XR-JSG100 three-roller planetary pipe mill without temperature adjustment and be rolled.Pipe fitting specification after rolling is Φ 55 * 2.5mm, and rolling deformation district temperature is at 750-850 ℃, and mill speed is 20m/min.Brass tube after rolling enters the coiler rewinding after water-cooled, and then carries out multi-pass and be drawn to Φ 6.35 * 0.6mm, makes finished product finally by heat-treatment of annealing.Adopt the H85 brass tube mechanical performance of this explained hereafter good, can be used as the material of air conditioner connecting pipe and evaporimeter, condenser, in the demand that can satisfy the user qualitatively.
In sum, the present invention utilizes the advantage of extrusion technique and two kinds of methods of planetary rolling technology, carries out " heating once and rolling ", have efficient, energy-conservation, lumber recovery is high, tubing low cost of manufacture, advantages such as manufactured goods tubing quality better.Adopt manufactured copper compo pipe of the present invention to overcome defective and deficiency that prior art exists, can produce high-quality copper alloy tube and copper alloy coil pipe, improved production efficiency and the lumber recovery of copper alloy tube greatly.
The above is the preferred embodiments of the present invention only, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. the manufacture method of a copper alloy tube is characterized in that, may further comprise the steps:
Step 101 is pushed the copper alloy strand after the heating, obtains pipe thickness and be 10 millimeters to 40 millimeters copper alloy pipe;
Step 104 is sent into extruding back and the described copper alloy pipe that is in the red heat state and is carried out one-pass roller in the planetary rolling machine, controlled rolling speed between 4m/min to 40m/min, the contraction percentage of area between 50% to 95%, obtain copper alloy coil pipe;
Step 105, to the described copper alloy coil pipe that obtains stretch, the subsequent treatment of any one or any several combinations in moulding, annealing or the finishing, make the copper alloy tube finished product.
2. the manufacture method of copper alloy tube according to claim 1 is characterized in that, between described step 101 and step 104, also comprises:
Step 103, to through before the described copper alloy pipe that obtains after the step process carry out temperature adjusting.
3. the manufacture method of copper alloy tube according to claim 2 is characterized in that, described temperature adjusting comprises that natural temperature adjusting, online adjustment, off-line temperature are regulated or samming is handled.
4. the manufacture method of copper alloy tube according to claim 2 is characterized in that, between described step 101 and step 103, also comprises:
Step 102 is carried out tube reducing to the described copper alloy pipe that obtains after handling through described step 101 and is handled.
5. the manufacture method of copper alloy tube according to claim 4 is characterized in that, carries out inert gas shielding in described step 101 to the process of described step 104.
6. according to the manufacture method of each described copper alloy tube among the claim 1-5, it is characterized in that described red heat state is the state of temperature between 250 to 990 ℃.
7. the manufacture method of copper alloy tube according to claim 6, it is characterized in that, in described step 104, by controlled rolling speed, the contraction percentage of area, intensity of cooling when rolling, make the rolling temperature of described copper alloy pipe in described planetary rolling machine remain on the recrystallization temperature of described copper alloy.
8. the manufacture method of copper alloy tube according to claim 7 is characterized in that, in described step 104, adopts emulsion to cool off when rolling; Control described rolling temperature between 600 ℃ to 990 ℃; The planetary rolling machine that described planetary rolling machine is the 2-6 roller.
9. the manufacture method of copper alloy tube according to claim 6 is characterized in that, in described step 104, the pipe fitting after the one-pass roller of described planetary rolling machine is cooled off or cooling naturally at room temperature fast.
10. a copper alloy tube is characterized in that, adopts and makes as the manufacture method of each described copper alloy tube among the claim 1-9.
Priority Applications (1)
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| CN110964942A (en) * | 2019-12-19 | 2020-04-07 | 无锡隆达金属材料有限公司 | Preparation process of high-strength wear-resistant copper alloy pipe |
| CN115008141A (en) * | 2022-08-05 | 2022-09-06 | 江苏允能新材料科技有限公司 | Casting-rolling manufacturing method of brass pipe and brass pipe |
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Denomination of invention: Manufacturing method of copper alloy pipe and copper alloy pipe Effective date of registration: 20221206 Granted publication date: 20150909 Pledgee: China Merchants Bank Co.,Ltd. Changzhou Branch Pledgor: Jiangsu Xingrong Hi-Tech Co.,Ltd. Registration number: Y2022980025182 |