CN103205661A - Preparation method of nickel pipe or nickel alloy pipe for heat exchanger and condenser - Google Patents
Preparation method of nickel pipe or nickel alloy pipe for heat exchanger and condenser Download PDFInfo
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Abstract
The invention discloses a preparation method of a nickel pipe or a nickel alloy pipe for a heat exchanger and a condenser, belonging to the technical field of the preparation of heat exchanging pipes. The preparation method comprises the following steps of: selecting a perforated pipe and treating the surface of the perforated pipe; introducing an acquired pipe blank into a cold rolling mill for cogging; introducing a cogged pipe into a greasy dirt removing container to remove the greasy dirt, and washing after the greasy dirt is removed; introducing the cleaned cogged pipe into an annealing furnace to anneal, controlling the annealing temperature and the annealing time, cooling and discharging from the furnace; straightening, polishing, coping and blanking the acquired annealing pipe blank; firstly introducing the acquired pretreatment pipe blank into the cold rolling mill to coldly roll the finished product, repeatedly removing the greasy dirt, annealing the finished product after the greasy dirt is removed, straightening and polishing the finished product again after annealing; and cutting two end parts of the acquired primary blank and cutting the blank according to a required length so as to acquire the nickel pipe or the nickel alloy pipe for the heat exchanger and the condenser. The preparation method of the nickel pipe or the nickel alloy pipe for the heat exchanger and the condenser has the advantages of obviously shortening the process flows, improving the preparation efficiency, saving the energy resource and improving the yield.
Description
Technical field
The invention belongs to the heat exchanger tube preparing technical field, be specifically related to a kind of interchanger and condenser with the preparation method of nickel pipe or nickelalloy pipe.
Background technology
Nickel-base alloy is a kind of special stainless steel, and main alloy element has chromium, molybdenum, tungsten, cobalt, aluminium, titanium, boron and zirconium etc., and wherein, chromium plays anti-oxidant and anticorrosive effect, and other element plays strengthening effect.Nickel-base alloy has higher intensity, anti-oxidant, anti-exhaust gas corrosion ability etc. under 850-1300 ℃ of high temperature, it is the class alloy most widely used in the superalloy, that hot strength is the highest, not only be applied to aerospace, nuclear reactor etc., and the high temperature component that are widely used in Energy conversion equipment for example aforesaid interchanger and condenser.With respect to known common stainless steel 304, the content of the nickel of nickel-base alloy, chromium and molybdenum is higher, is that stainless steel 304 can't match in excellence or beauty with it at aforesaid aspect such as high temperature resistant, corrosion-resistant and anti-oxidant.
Have just because of nickel-base alloy and to be not limited to the aforesaid performance of standing out from one's fellows, thereby as new steel grade, novel material and generally be subjected to thinking highly of of people, especially, industry is devoted to its form with tubing is extended to interchanger and condenser in recent years, but because rely on its aforementioned properties the comprehensive work-ing life of significant prolongation interchanger and condenser.
Though in disclosed Chinese patent literature up to now, can be seen in the preparation method's of the tubing that interchanger and condenser use technical intelligence, typical as application for a patent for invention publication No. CN102899595A recommends that " a kind of preparation method of cupronickel pipe " arranged, but this patent application scheme is for will be by directly making finished product nickel pipe or the nickelalloy pipe does not have referential technical meaning from the perforated pipe pipe of commercially available channel acquisition.Because the steps in sequence of this patent application scheme is: the founding of copper-nickel alloy material obtain ingot casting, ingot casting be squeezed into pipe, pipe by tube rolling mill be rolled into the web-like pipe, the web-like pipe pulls into web-like finished product, web-like finished products by aligning and sawing through the plate drawing machine dish, obtains cupronickel pipe (specifically can referring to the 0010th to 0017 section in the specification sheets of this patent application).Again, as the industry's knowledge of the reason, as the preparation of tubing, reasonably reducing cold rolling blooming pass is an important factor that overlooks either of the two, because on the one hand can satisfy the industrial amplification production requirement, and remarkable save energy on the other hand, can improve lumber recovery on the one hand again, etc.Yet, in present disclosed patent and non-patent literature, there is no all corresponding enlightenments.
In view of above-mentioned prior art, the applicant has done positive and useful exploration and trial, finally formed technical scheme described below, and tested in the applicant plant area under the necessary secrecy provision having taked, it is practicable that the result proves.
Summary of the invention
Task of the present invention is to provide a kind of interchanger and the condenser preparation method with nickel pipe or nickelalloy pipe, and this method has the few and production efficiency that is improved of brief, the cold rolling blooming pass of technical process, save energy and improves the strong point of lumber recovery.
Task of the present invention is finished like this, and a kind of interchanger and condenser may further comprise the steps with the preparation method of nickel pipe or nickelalloy pipe:
A) get the raw materials ready, choose perforation tubing by the specification requirement of finished product nickel pipe or nickelalloy pipe, and to the surface treatment of perforation tubing, obtain pipe;
B) cold rolling, will be by steps A) pipe that obtains is introduced the cold-rolling mill cogging, and the control blooming pass obtains the cogging pipe for once or twice;
C) degrease, will be by step B) the cogging pipe that obtains introduces in the container that degreases and degreased by the oil removing soiling solution, attaches the greasy dirt at the surfaces externally and internally of cogging pipe when removing the cold-rolling mill cogging, washes after degreasing, and obtains cleaning the cogging pipe;
D) annealing will be by step C) the cleaning cogging pipe that obtains is introduced in the annealing furnace and is annealed, and control annealing temperature and annealing time, and cooling is come out of the stove, and obtains the pipe of annealing;
E) pre-treatment is to by step D) the annealing pipe that obtains is aligned successively, polishing, reconditioning and blanking, obtains the pre-treatment pipe;
F) the cold rolling and finished products of finished product earlier will be by step D) the pre-treatment pipe that obtains introduces cold-rolling mill to carry out finished product cold rolling, repeating step C again) degrease, after degreasing, carry out finished products, repeating step E again behind the finished products) described in aligning and polishing, obtain base just;
G) aftertreatment is to by step F) end, the two ends excision of the first base that obtains, and by required length scaling severing, obtain heat exchanger condenser with nickel pipe or nickelalloy pipe.
In a specific embodiment of the present invention, tube surfaces is handled steps A) is: earlier by appearance method to the visualize of perforation tube surfaces, and mark is carried out at the hair line that is produced by piercing process that when check found and the flaw position of protruding burr, use portable angle grinding machine to the reconditioning of flaw position again, to remove hair line and protruding burr.
In another specific embodiment of the present invention, step B) cold-rolling mill described in is two cold mills, and when described blooming pass is twice, before entering second passage cold rolling, earlier the cold rolling cogging pipe that obtains of first passage is repeated described step C successively), D) and step e), then carry out the cold-rolling mill cogging of second passage.
In another specific embodiment of the present invention, the processing parameter of described cold-rolling mill cogging is: the relative decrement of section is 33-50%, and the external diameter draught is 10-30 ㎜, and the wall thickness draught is 0.5-3 ㎜, prolong multiple and be 1.5-3.5 doubly, cold rolling feed is 3-5 ㎜/inferior.
In another specific embodiment of the present invention, step C) container that degreases described in is the groove that degreases of being furnished with heating unit, the capacity of described oil removing soiling solution accounts for the 75-80% of the groove volume that degreases, the Heating temperature of described heating unit is 50-70 ℃, the time of degreasing is 60-120min, and described oil removing soiling solution is 1 by water and environment-friendly type agent of non-phosphate degreasing by weight: 0.03-0.06 constitutes.
Also have in the specific embodiment of the present invention, described environment-friendly type agent of non-phosphate degreasing is made of following proportion raw material by weight: tensio-active agent 0.5-3 part, sodium sulfate 3-6 part, Sunmorl N 60S 0.1-0.4 part, disodium ethylene diamine tetraacetate 5-10 part, water glass 4-10 part and detergent 0.5-2 part, and wherein: described tensio-active agent is alcohol ether carboxylate; Described sodium sulfate is anhydrous sodium sulphate; Described water glass is the modification sodium disilicate.
More of the present invention and in specific embodiment, step D) annealing furnace described in is the anaerobic annealing furnace, and described control annealing temperature and annealing time are that annealing temperature and annealing time are controlled to be 500-580 ℃ and 110-130min respectively; The described furnace cooling that is cooled to, and the temperature of furnace cooling is 50-60 ℃.
In of the present invention and then specific embodiment, step e) aligning described in is that to adopt the trade mark be the horizontal straightener alignings of 60 types, seven rollers, and linearity is controlled to be 1000: 3; The polishing of metal cylindrical polishing machine is adopted in described polishing; Described reconditioning is for repeating steps A) described in surface treatment; Described blanking for according to the contract of signing with the user and processing requirement to the nickel pipe of scale or nickelalloy pipe before making production tube to weigh the mode blanking, the account form of weighing is with the rice re-computation, and a rice re-computation is: external diameter subtracts wall thickness and multiply by wall thickness and multiply by 0.028 again.
Of the present invention again more and in specific embodiment, step F) the cold rolling used cold-rolling mill of the finished product described in is the multiple roll cold reducing mill, the cold rolling parameter of this finished product is: the relative decrement 20-35% of section, external diameter draught 3-5 ㎜, the wall thickness draught is 0.5-1 ㎜, extend multiple and be 1.2-1.5 doubly, cold rolling feed is 3-4 ㎜/inferior; The used annealing furnace of described finished products is the anaerobic annealing furnace, and annealing temperature is 500-550 ℃, and annealing time is 150-210min.
In again of the present invention and then specific embodiment, step G) end, the two ends excision with first base described in, the length 20-30 ㎜ of excision has the length scaling requirement as technology, then adds the 5mm-10mm scale by processing requirement length.
Technical scheme provided by the invention is owing to only need cold rolling cogging once or twice, thereby remarkable shortened process and be improved preparation efficiency not only, and significantly save energy and raising lumber recovery (lumber recovery behind the blanking of weighing can improve 8-10%).
Embodiment
Embodiment 1:
Be that 6m, aperture are that 45 ㎜ and wall thickness are that interchanger and the condenser of 4.5 ㎜ is example with the nickel pipe with preparation length.
A) get the raw materials ready, by the specification requirement of finished product nickel pipe choose preferably produced by the Jenner of LiaoNing, China province Shenyang City novel material company limited and before the application proposes at the perforation nickel pipe tubing of the N6 of market sale Φ 85*8, and perforation nickel pipe tube surfaces is handled, specifically: earlier by appearance method to the visualize of perforation nickel pipe tube surfaces, and mark (with marking pen or similarly instrument such as chalk) is carried out at the hair line that is caused by piercing process that when check found and the flaw position of protruding burr and pit etc., use portable angle grinding machine to the reconditioning of flaw position again, with abundant removal hair line, projection burr and pit etc. obtain pipe;
B) cold rolling (being cogging), will be by steps A) pipe that obtains introduces and carries out the cold rolling i.e. cogging for the first time first time on two cold mills or claim that a cogging to external diameter is 65 ㎜, wall thickness is 6 ㎜, cold rolling processing parameter is for the first time: the relative decrement 42.6% of section, the external diameter draught is 20 ㎜, the wall thickness draught is 2 ㎜, extending multiple is 1.74 times, cold rolling feed is 4 ㎜/inferior, after having finished this first passage cold rolling, the step C that will describe below repeating successively), D) and step e), the cold rolling cogging of then carrying out second passage is that twice cogging to external diameter is 48 ㎜, wall thickness is 5.5 ㎜, cold rolling processing parameter is for the second time: the relative decrement 33.9% of section, and the external diameter draught is 17 ㎜, the wall thickness draught is 0.5 ㎜, extend multiple and be 1.52 times and cold rolling feed and be 4 ㎜/inferior, obtain the cogging pipe through twice cogging;
C) degrease, will be by step B) the cogging pipe that obtains is introduced is furnished with heating unit (electric heater unit) and fills in the groove that degreases of oil removing soiling solution, the capacity of oil removing soiling solution in the groove that degreases namely measured and accounted for 80% of the groove volume that degreases, neither show the hydrorrhea that degreases that makes in the groove behind the groove that degreases and go out outside the groove to ensure that the cogging pipe is introduced, ensure that again the cogging pipe is flooded by the oil removing soiling solution, by heating unit the oil removing soiling solution is heated to 70 ℃, the degrease time of cogging pipe in the groove that degreases is 120min, go out to degrease and with water blast gun the cogging pipe is washed behind the groove, obtain cleaning the cogging pipe, oil removing soiling solution described in this step is 1: 0.06 formation by water (tap water) and environment-friendly type agent of non-phosphate degreasing by weight, the agent of non-phosphate degreasing that described environment-friendly type agent of non-phosphate degreasing is made of following proportion raw material by weight: tensio-active agent is 3 parts of alcohol ether carboxylates, 3 parts of anhydrous sodium phosphates, 0.2 part of Sunmorl N 60S, 10 parts of disodium ethylene diamine tetraacetate, water glass is 1.5 parts of 4 parts of modification sodium disilicates and detergents, wherein, detergent preferably by Chinese Ningbo City, Zhejiang Province forever abundant chemical industry company limited produce and the application day before the trade mark in market sale be TAY-2 metal cleaning detergent;
D) annealing will be by step C) the cleaning cogging pipe that obtains introduces in the anaerobic annealing furnace and anneals, and annealing temperature is 580 ℃, and annealing time is 110min, and annealing cools to 50-60 ℃ with the furnace after finishing, and comes out of the stove, and obtains the pipe of annealing;
E) pre-treatment, earlier to by step D) the annealing pipe that obtains is the horizontal straightener alignings of 60 types, seven rollers by means of the trade mark of preferably being produced by plum Lee of Changshu City, Jiangsu Province, China machinery company limited, linearity is controlled to be 1000: 3, again by metal cylindrical polishing machine (be JSD-A shaped metal pipe polishing machine as the trade mark produced by Shanghai City, China GAST machinery company limited) polishing, A set by step then) mode is carried out surface treatment, carry out blanking at last, specifically: before making production tube, be Weighing mode blanking (industry also claim fracture) in the mode of weighing to the nickel pipe of scale according to the contract requirement of signing with user such as interchanger and condenser production firm and processing requirement, the Weighing mode is with every meter rice re-computation of nickel pipe, the formula of rice re-computation is: external diameter subtracts wall thickness and multiply by wall thickness and multiply by 0.028 ［ (external diameter-wall thickness) * wall thickness * 0.028 ］ again, obtains the pre-treatment pipe;
F) the cold rolling and finished products of finished product, earlier will be by step e) the pre-treatment pipe that obtains introduces the multiple roll cold reducing mill and carries out finished product and be cold-rolled to diameter 45 ㎜, wall thickness 4.5 ㎜, the cold rolling processing parameter of finished product is: the relative decrement of section is 22%, the external diameter draught is 3 ㎜, the wall thickness draught is 1 ㎜, extend multiple and be 1.28 times and cold rolling feed and be 4 ㎜/inferior, cold rolling back repeating step C) degrease, the back that degreases is introduced the anaerobic annealing furnace and is carried out finished products, and the finished products temperature is 500 ℃, the finished products time is 210min, come out of the stove after cooling to normal temperature with the furnace, and repeating step E again) described in aligning and polishing, obtain base just;
G) aftertreatment (being finishing), to by step F) end, the two ends excision of the first base that obtains, specifically: excise an end termination, length 20 ㎜ of excision the other end termination, and with 6 meters be a unit severing, obtaining length is that 6m, aperture are that 45 ㎜ and wall thickness are interchanger and the condenser nickel pipe of 4.5 ㎜.The cogging number of times of present embodiment is twice, i.e. the cogging of two passages.
Embodiment 2:
Be that 6m, aperture are that 60.3 ㎜ and wall thickness are that interchanger and the condenser of 4.2 ㎜ is example with the nickelalloy pipe with preparation length.
A) get the raw materials ready, by the specification requirement of finished product nickel pipe choose preferably produced by the Jenner of LiaoNing, China province Shenyang City novel material company limited and before the application proposes at the perforation nickelalloy pipe tubing of the N6 of market sale Φ 85*8, and perforation nickelalloy pipe tube surfaces is handled, specifically: earlier by appearance method to the visualize of perforation nickelalloy pipe tube surfaces, and mark (with marking pen or similarly instrument such as chalk) is carried out at the hair line that is caused by piercing process that when check found and the flaw position of protruding burr and pit etc., use portable angle grinding machine to the reconditioning of flaw position again, with abundant removal hair line, projection burr and pit etc. obtain pipe;
B) cold rolling (being cogging), will be by steps A) pipe that obtains introduces that to carry out a cogging to external diameter on two cold mills be 65 ㎜, wall thickness is 5.2 ㎜, and cold rolling processing parameter is: the relative decrement 49.5% of section, and the external diameter draught is 20 ㎜, the wall thickness draught is 2.8 ㎜, extending multiple is 1.98 times, and cold rolling feed is 4 ㎜/inferior, after having finished this passage cold rolling, the step C that will describe below repeating successively), D) and step e), obtain the cogging pipe through a cogging;
C) degrease, will be by step B) the cogging pipe that obtains is introduced is furnished with heating unit (electric heater unit) and fills in the groove that degreases of oil removing soiling solution, the capacity of oil removing soiling solution in the groove that degreases namely measured and accounted for 75% of the groove volume that degreases, neither show the hydrorrhea that degreases that makes in the groove behind the groove that degreases and go out outside the groove to ensure that the cogging pipe is introduced, ensure that again the cogging pipe is flooded by the oil removing soiling solution, by heating unit the oil removing soiling solution is heated to 50 ℃, the degrease time of cogging pipe in the groove that degreases is 60min, go out to degrease and with water blast gun the cogging pipe is washed behind the groove, obtain cleaning the cogging pipe, oil removing soiling solution described in this step is 1: 0.03 formation by water (tap water) and environment-friendly type agent of non-phosphate degreasing by weight, the agent of non-phosphate degreasing that described environment-friendly type agent of non-phosphate degreasing is made of following proportion raw material by weight: tensio-active agent is 0.5 part of alcohol ether carboxylate, 6 parts of anhydrous sodium phosphates, 0.4 part of Sunmorl N 60S, 6.5 parts of disodium ethylene diamine tetraacetate, water glass is 0.5 part of 10 parts of modification sodium disilicates and detergent, wherein, detergent preferably by Chinese Ningbo City, Zhejiang Province forever abundant chemical industry company limited produce and the application day before the trade mark in market sale be TAY-2 metal cleaning detergent;
D) annealing will be by step C) the cleaning cogging pipe that obtains introduces in the anaerobic annealing furnace and anneals, and annealing temperature is 500 ℃, and annealing time is 130min, and annealing cools to 50-55 ℃ with the furnace after finishing, and comes out of the stove, and obtains the pipe of annealing;
E) pre-treatment, earlier to by step D) the annealing pipe that obtains is the horizontal straightener alignings of 60 types, seven rollers by means of the trade mark of preferably being produced by plum Lee of Changshu City, Jiangsu Province, China machinery company limited, linearity is controlled to be 1000: 3, again by metal cylindrical polishing machine (be JSD-A shaped metal pipe polishing machine as the trade mark produced by Shanghai City, China GAST machinery company limited) polishing, A set by step then) mode is carried out surface treatment, carry out blanking at last, specifically: before making production tube, be Weighing mode blanking (industry also claim fracture) in the mode of weighing to the nickel pipe of scale according to the contract requirement of signing with user such as interchanger and condenser production firm and processing requirement, the Weighing mode is with every meter rice re-computation of nickel pipe, the formula of rice re-computation is: external diameter subtracts wall thickness and multiply by wall thickness and multiply by 0.028 ［ (external diameter-wall thickness) * wall thickness * 0.028 ］ again, obtains the pre-treatment pipe;
F) the cold rolling and finished products of finished product, earlier will be by step e) the pre-treatment pipe that obtains introduces the multiple roll cold reducing mill and carries out finished product and be cold-rolled to diameter 60.3 ㎜, wall thickness 4.2 ㎜, the cold rolling processing parameter of finished product is: the relative decrement of section is 24.2%, the external diameter draught is 4.7 ㎜, the wall thickness draught is 1 ㎜, extend multiple and be 1.32 times and cold rolling feed and be 3 ㎜/inferior, cold rolling back repeating step C) degrease, the back that degreases is introduced the anaerobic annealing furnace and is carried out finished products, and the finished products temperature is 550 ℃, the finished products time is 150min, come out of the stove after cooling to normal temperature with the furnace, and back repeating step E) described in aligning and polishing, obtain base just;
G) aftertreatment (being finishing), to by step F) end, the two ends excision of the first base that obtains, specifically: excise an end termination, length 20 ㎜ of excision the other end termination, and with 6 meters be a unit severing, obtaining length is that 6m, aperture are that 60.3 ㎜ and wall thickness are interchanger and the condenser nickelalloy pipe of 4.2 ㎜.The cogging number of times of present embodiment namely only needs the cogging of a passage for once.
Embodiment 3:
Be that 6m, aperture are that 35.6 ㎜ and wall thickness are that interchanger and the condenser of 3.5 ㎜ is example with the nickelalloy pipe with preparation length.
A) get the raw materials ready, by the specification requirement of finished product nickel pipe choose preferably produced by the Jenner of LiaoNing, China province Shenyang City novel material company limited and before the application proposes at the perforation nickelalloy pipe tubing of the N6 of market sale Φ 50*5, and perforation nickelalloy pipe tube surfaces is handled, specifically: earlier by appearance method to the visualize of perforation nickelalloy pipe tube surfaces, and mark (with marking pen or similarly instrument such as chalk) is carried out at the hair line that is caused by piercing process that when check found and the flaw position of protruding burr and pit etc., use portable angle grinding machine to the reconditioning of flaw position again, with abundant removal hair line, projection burr and pit etc. obtain pipe;
B) cold rolling (being cogging), will be by steps A) pipe that obtains introduces that to carry out a cogging to external diameter on two cold mills be 40 ㎜, wall thickness is 4 ㎜, and cold rolling processing parameter is: the relative decrement 36% of section, and the external diameter draught is 10 ㎜, the wall thickness draught is 1 ㎜, extending multiple is 1.56 times, and cold rolling feed is 5 ㎜/inferior, after having finished this passage cold rolling, the step C that will describe below repeating successively), D) and step e), obtain the cogging pipe through a cogging;
C) degrease, will be by step B) the cogging pipe that obtains is introduced is furnished with heating unit (electric heater unit) and fills in the groove that degreases of oil removing soiling solution, the capacity of oil removing soiling solution in the groove that degreases namely measured and accounted for 78% of the groove volume that degreases, neither show the hydrorrhea that degreases that makes in the groove behind the groove that degreases and go out outside the groove to ensure that the cogging pipe is introduced, ensure that again the cogging pipe is flooded by the oil removing soiling solution, by heating unit the oil removing soiling solution is heated to 60 ℃, the degrease time of cogging pipe in the groove that degreases is 90min, go out to degrease and with water blast gun the cogging pipe is washed behind the groove, obtain cleaning the cogging pipe, oil removing soiling solution described in this step is 1: 0.05 formation by water (tap water) and environment-friendly type agent of non-phosphate degreasing by weight, the agent of non-phosphate degreasing that described environment-friendly type agent of non-phosphate degreasing is made of following proportion raw material by weight: tensio-active agent is 1.8 parts of alcohol ether carboxylates, 4.5 parts of anhydrous sodium phosphates, 0.1 part of Sunmorl N 60S, 5 parts of disodium ethylene diamine tetraacetate, water glass is 2 parts of 6 parts of modification sodium disilicates and detergents, wherein, detergent preferably by Chinese Ningbo City, Zhejiang Province forever abundant chemical industry company limited produce and the application day before the trade mark in market sale be TAY-2 metal cleaning detergent;
D) annealing will be by step C) the cleaning cogging pipe that obtains introduces in the anaerobic annealing furnace and anneals, and annealing temperature is 530 ℃, and annealing time is 120min, and annealing cools to 55-60 ℃ with the furnace after finishing, and comes out of the stove, and obtains the pipe of annealing;
E) pre-treatment, earlier to by step D) the annealing pipe that obtains is the horizontal straightener alignings of 60 types, seven rollers by means of the trade mark of preferably being produced by plum Lee of Changshu City, Jiangsu Province, China machinery company limited, linearity is controlled to be 1000: 3, again by metal cylindrical polishing machine (be JSD-A shaped metal pipe polishing machine as the trade mark produced by Shanghai City, China GAST machinery company limited) polishing, A set by step then) mode is carried out surface treatment, carry out blanking at last, specifically: before making production tube, be Weighing mode blanking (industry also claim fracture) in the mode of weighing to the nickel pipe of scale according to the contract requirement of signing with user such as interchanger and condenser production firm and processing requirement, the Weighing mode is with every meter rice re-computation of nickel pipe, the formula of rice re-computation is: external diameter subtracts wall thickness and multiply by wall thickness and multiply by 0.028 ［ (external diameter-wall thickness) * wall thickness * 0.028 ］ again, obtains the pre-treatment pipe;
F) the cold rolling and finished products of finished product, earlier will be by step e) the pre-treatment pipe that obtains introduces the multiple roll cold reducing mill and carries out finished product and be cold-rolled to diameter 35.6 ㎜, wall thickness 3 ㎜, the cold rolling processing parameter of finished product is: the relative decrement of section is 32%, the external diameter draught is 4.4 ㎜, the wall thickness draught is 1 ㎜, extend multiple and be 1.47 times and cold rolling feed and be 4 ㎜/inferior, cold rolling back repeating step C) degrease, the back that degreases is introduced the anaerobic annealing furnace and is carried out finished products, and the finished products temperature is 550 ℃, the finished products time is 150min, come out of the stove after cooling to normal temperature with the furnace, and back repeating step E) described in aligning and polishing, obtain base just;
G) aftertreatment (being finishing), to by step F) end, the two ends excision of the first base that obtains, specifically: excise an end termination, length 20 ㎜ of excision the other end termination, and with 6 meters be a unit severing, obtaining length is that 6m, aperture are that 35.6 ㎜ and wall thickness are interchanger and the condenser nickelalloy pipe of 3.5 ㎜.Present embodiment only needs the once cold rolling cogging.
Claims (10)
1. an interchanger and condenser is characterized in that may further comprise the steps with the preparation method of nickel pipe or nickelalloy pipe:
A) get the raw materials ready, choose perforation tubing by the specification requirement of finished product nickel pipe or nickelalloy pipe, and to the surface treatment of perforation tubing, obtain pipe;
B) cold rolling, will be by steps A) pipe that obtains is introduced the cold-rolling mill cogging, and the control blooming pass obtains the cogging pipe for once or twice;
C) degrease, will be by step B) the cogging pipe that obtains introduces in the container that degreases and degreased by the oil removing soiling solution, attaches the greasy dirt at the surfaces externally and internally of cogging pipe when removing the cold-rolling mill cogging, washes after degreasing, and obtains cleaning the cogging pipe;
D) annealing will be by step C) the cleaning cogging pipe that obtains is introduced in the annealing furnace and is annealed, and control annealing temperature and annealing time, and cooling is come out of the stove, and obtains the pipe of annealing;
E) pre-treatment is to by step D) the annealing pipe that obtains is aligned successively, polishing, reconditioning and blanking, obtains the pre-treatment pipe;
F) the cold rolling and finished products of finished product earlier will be by step D) the pre-treatment pipe that obtains introduces cold-rolling mill to carry out finished product cold rolling, repeating step C again) degrease, after degreasing, carry out finished products, repeating step E again behind the finished products) described in aligning and polishing, obtain base just;
G) aftertreatment is to by step F) end, the two ends excision of the first base that obtains, and by required length scaling severing, obtain heat exchanger condenser with nickel pipe or nickelalloy pipe.
2. interchanger according to claim 1 and condenser are with the preparation method of nickel pipe or nickelalloy pipe, it is characterized in that steps A) described in tube surfaces handled be: earlier by appearance method to the visualize of perforation tube surfaces, and mark is carried out at the hair line that is produced by piercing process that when check found and the flaw position of protruding burr, use portable angle grinding machine to the reconditioning of flaw position again, to remove hair line and protruding burr.
3. interchanger according to claim 1 and condenser are with the preparation method of nickel pipe or nickelalloy pipe, it is characterized in that step B) described in cold-rolling mill be two cold mills, and when described blooming pass is twice, before entering second passage cold rolling, earlier the cold rolling cogging pipe that obtains of first passage is repeated described step C successively), D) and step e), then carry out the cold-rolling mill cogging of second passage.
4. according to claim 1 or 3 described interchanger and the condenser preparation method with nickel pipe or nickelalloy pipe, the processing parameter that it is characterized in that described cold-rolling mill cogging is: the relative decrement of section is 33-50%, the external diameter draught is 10-30 ㎜, the wall thickness draught is 0.5-3 ㎜, prolong multiple and be 1.5-3.5 doubly, cold rolling feed is 3-5 ㎜/inferior.
5. interchanger according to claim 1 and condenser are with the preparation method of nickel pipe or nickelalloy pipe, it is characterized in that step C) described in the container that degreases be the groove that degreases of being furnished with heating unit, the capacity of described oil removing soiling solution accounts for the 75-80% of the groove volume that degreases, the Heating temperature of described heating unit is 50-70 ℃, the time of degreasing is 60-120min, and described oil removing soiling solution is 1 by water and environment-friendly type agent of non-phosphate degreasing by weight: 0.03-0.06 constitutes.
6. interchanger according to claim 5 and condenser are with the preparation method of nickel pipe or nickelalloy pipe, it is characterized in that described environment-friendly type agent of non-phosphate degreasing is made of following proportion raw material by weight: tensio-active agent 0.5-3 part, sodium sulfate 3-6 part, Sunmorl N 60S 0.1-0.4 part, disodium ethylene diamine tetraacetate 5-10 part, water glass 4-10 part and detergent 0.5-2 part, wherein: described tensio-active agent is alcohol ether carboxylate; Described sodium sulfate is anhydrous sodium sulphate; Described water glass is the modification sodium disilicate.
7. interchanger according to claim 1 and condenser are with the preparation method of nickel pipe or nickelalloy pipe, it is characterized in that step D) described in annealing furnace be the anaerobic annealing furnace, described control annealing temperature and annealing time are that annealing temperature and annealing time are controlled to be 500-580 ℃ and 110-130min respectively; The described furnace cooling that is cooled to, and the temperature of furnace cooling is 50-60 ℃.
8. interchanger according to claim 1 and condenser is characterized in that step e with the preparation method of nickel pipe or nickelalloy pipe) described in aligning be that to adopt the trade mark be the horizontal straightener alignings of 60 types, seven rollers, linearity is controlled to be 1000: 3; The polishing of metal cylindrical polishing machine is adopted in described polishing; Described reconditioning is for repeating steps A) described in surface treatment; Described blanking for according to the contract of signing with the user and processing requirement to the nickel pipe of scale or nickelalloy pipe before making production tube to weigh the mode blanking, the account form of weighing is with the rice re-computation, and a rice re-computation is: external diameter subtracts wall thickness and multiply by wall thickness and multiply by 0.028 again.
9. interchanger according to claim 1 and condenser are with the preparation method of nickel pipe or nickelalloy pipe, it is characterized in that step F) described in the cold rolling used cold-rolling mill of finished product be the multiple roll cold reducing mill, the cold rolling parameter of this finished product is: the relative decrement 20-35% of section, external diameter draught 3-5 ㎜, the wall thickness draught is 0.5-1 ㎜, extend multiple and be 1.2-1.5 doubly, cold rolling feed is 3-4 ㎜/inferior; The used annealing furnace of described finished products is the anaerobic annealing furnace, and annealing temperature is 500-550 ℃, and annealing time is 150-210min.
10. interchanger according to claim 1 and condenser are with the preparation method of nickel pipe or nickelalloy pipe, it is characterized in that step G) described in the excision of the end, two ends of first base, the length 20-30 ㎜ of excision, as technology the length scaling requirement is arranged, then add the 5mm-10mm scale by processing requirement length.
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| CN2013101151108A CN103205661A (en) | 2013-04-06 | 2013-04-06 | Preparation method of nickel pipe or nickel alloy pipe for heat exchanger and condenser |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103658183A (en) * | 2013-12-08 | 2014-03-26 | 西北有色金属研究院 | Method for manufacturing high-straightness thin-wall titanium alloy tubes |
| CN112945982A (en) * | 2021-04-07 | 2021-06-11 | 四川华都核设备制造有限公司 | High-sensitivity hydrogen meter and processing method |
| CN113020313A (en) * | 2021-03-02 | 2021-06-25 | 攀钢集团江油长城特殊钢有限公司 | Ledeburite die steel seamless steel tube and preparation method thereof |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102294579A (en) * | 2011-08-29 | 2011-12-28 | 西部钛业有限责任公司 | Method for manufacturing thin-wall and ultra-long nickel-copper alloy pipes |
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2013
- 2013-04-06 CN CN2013101151108A patent/CN103205661A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102294579A (en) * | 2011-08-29 | 2011-12-28 | 西部钛业有限责任公司 | Method for manufacturing thin-wall and ultra-long nickel-copper alloy pipes |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103658183A (en) * | 2013-12-08 | 2014-03-26 | 西北有色金属研究院 | Method for manufacturing high-straightness thin-wall titanium alloy tubes |
| CN103658183B (en) * | 2013-12-08 | 2015-12-02 | 西北有色金属研究院 | A kind of manufacture method of high linearity thin-wall titanium alloy tubing |
| CN113020313A (en) * | 2021-03-02 | 2021-06-25 | 攀钢集团江油长城特殊钢有限公司 | Ledeburite die steel seamless steel tube and preparation method thereof |
| CN112945982A (en) * | 2021-04-07 | 2021-06-11 | 四川华都核设备制造有限公司 | High-sensitivity hydrogen meter and processing method |
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