CN103695703A - Process method for preparing brass tube for bathroom by using horizontal continuous casting method - Google Patents
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Abstract
The invention discloses a process method for preparing a brass tube for a bathroom by using a horizontal continuous casting method. According to the process method, the brass tube required for production is prepared through enabling copper, zinc and the like to be subjected to the steps of smelting, heat preservation, cooling, horizontal continuous casting, cutting, oxide layer removal and rolled tube annealing. The process method has the advantages that crystal grains of the interior tissue of the product are tiny and uniform isometric crystals, the tensile strength is high, the high-temperature softening strength is high, the corrosion resistance is strong, and the process is simple and easy to control, so that the process method is applicable to industrial popularization.
Description
Technical field
The present invention relates to chemical field, be specifically related to horizontal casting legal system for the processing method of bathroom brazed copper tube.
Background technology
In recent years, along with the development of construction industry, very swift and violent with the development of the high-grade brazed copper tube of Guan Wei representative with sanitary ware.Especially the foreign trade bathroom pipe market that exports the countries and regions such as Korea Spro, day, Europe, the United States is very good.Firm, corrosion resistant characteristic that brazed copper tube possesses, and become the first-selection that modern contractor installs at water supply pipe, heat supply, the refrigeration piping of all Commercial Residential Building's.Copper pipe melts many merits: brazed copper tube quality is hard, has the high strength of common metal, not perishable, and high temperature resistant, high pressure resistant, can in multiple environment, use; Simultaneously again than flexible, the easy torsion of common metal, be difficult for crack, non-frangibility, and there is certain frost heaving resistant and impact resistance, therefore in the waterworks in building copper plumbing once installation, use safe and reliable, even Maintenance free and maintenance.It is strictly principal feature that this product take that size deviation, mechanical property, surface quality and straight degree require, and difficulty of processing is large, to the level of tooling, requires also higher.At present, domestic production small scale, unstable product quality, many bathroom pipe fittings companies copper pipe dependence on import used.
Continuous casting is the process of certain section form strand that liquid metal is cast into continuously through one group of special cooling and bracing or strutting arrangement.Horizontal casting is a kind of continuous casting process of commonly using, because of the lead of its strand parallel with ground level, therefore be referred to as horizontal casting.Compared following advantage with conventional cast technology: (1) is saved operation, shortened flow process; Compare with die casting, it has saved the operations such as the demoulding, mould preparation, ingot casting soaking and cogging of die casting, and initial cost can save 40%, and floor space reduces 30%, and life cycle of the product is shortened in labor saving 75%, enhances productivity; (2) improve recovery rate of iron: the cutting head cutting tail loss of die casting is 10%-20%, and the loss of the cutting head cutting tail of continuous casting is only 1%-2%, therefore can improve recovery rate of iron, reduces the waste of raw material, reduces costs; (3) reduce energy expenditure: continuous casting has saved the operation that reheats of soaking pit, can consumption of energy reduce by 1/4 1 1/2 strand Direct Rollings, energy expenditure also can further reduce, and has shortened the process-cycle; (4) production process mechanize and level of automation are high; (5) slab quality is good: can produce various metals and alloy, and section bar is wide in variety, and because metal is by cooling rapidly, compact crystallization, homogeneous microstructure, can obtain the measured strand of matter; (6) horizontal caster device height is low, without building tall and big factory building, is specially adapted to middle-size and small-size workshop; (7) horizontal caster device structure is simple, and weight of equipment is fewer 40% than arc shaper, therefore initial cost is economized; Because equipment level is placed, installation and maintenance are convenient; (8) tundish and crystallizer are linked to be an integral body, have avoided secondary oxidation, and the clarity of strand is higher, and metal and the alloys range that can cast are large; (9) compare with arc continuous casting, the static pressure of horizontal continuous casting crystallizer is higher, and solidified shell contacts with crystallizer surface, and the cooling intensity of crystallizer is large, and is difficult for producing casting blank bulging, and strand component segregation is little; (10) strand is pulled out by horizontal direction, without straightening mechanism, therefore can cast and be difficult to the high alloy strand of distortion; (11) be specially adapted to production high-quality light section strand.Yet due to equipment, affect the factor of horizontal continuous casting blank quality (as casting temp, crystallizer and pulling speed etc.) etc. very many-sided impact, the copper pipe of producing there will be a lot of defects: surface irregularity, groove, eccentric, rough road, discontinuity liquid cave pitting, wavy overlapping, inner wall oxide, pore, shrinkage cavity, slag inclusion and internal fissure etc., in order to improve the quality of strand, improve the lumber recovery of product, reduce the tooling cost of product, just need to carry out some researchs to horizontal continuous casting process, grasp defect because what reason causes, relation between defect and processing parameter, by adjusting each processing parameter of horizontal casting, improve the quality of products.
The process of horizontal casting production bathroom brazed copper tube is subject to the impact of several factors, is a complicated process.Therefore the quality of product is exactly the result of many factors combined influence, the factor that affects quality product can be divided into two classes: the one, and the influence factor relevant with horizontal continuous casting process itself, the 2nd, operate relevant factor with workman, the influence factor of horizontal continuous casting process itself, comprise: the add-on of former material, order of addition(of ingredients) and method, smelting furnace, the temperature of holding furnace and insulating covering agent, the sealing of chute and nitrogen protection, the design of crystallizer, recirculating cooling water system, casting speed and throwing pattern etc., in this numerous influence factor, each factor connects each other, restriction mutually, for research has increased larger difficulty.The defect producing in horizontal copper pipe base casting process roughly can be divided three classes: surface imperfection, subsurface defect and shape defect.Surface imperfection is divided into again external defects and defect in inner surface, and external defects has surface crack, surface irregularity and groove etc.: defect in inner surface has rough road, discontinuity liquid cave pitting, wavy overlapping and inner wall oxide etc.; Subsurface defect has pore, shrinkage cavity, slag inclusion and internal fissure etc.; Shape defect has bias, ellipse and wall thickness deviation etc.Thereby seek a kind of scientific and reasonable complete processing, and effectively integrate processing step, determine each parameter of technique (feeding quantity, order of addition(of ingredients), casting temperature, crystallization water of condensation pressure, casting speed etc.), significant in the production practice of brazed copper tube.
Summary of the invention
The present invention is intended to solve prior art above shortcomings, and object is to provide horizontal casting legal system for the processing method of bathroom brazed copper tube, and the method has been determined scientific and reasonable processing step and processing parameter, simplify and standard technological operation; Supplementary material component and consumption have been determined, effectively improving product performance.
The technical scheme that realizes above-mentioned purpose is:
Horizontal casting legal system is for the processing method of bathroom brazed copper tube, and concrete steps are:
Melting: casting furnace is warming up to 100-150 ℃, insulation 1h, then be warming up to 700-800 ℃, electrolytic copper is added to casting furnace melting 30-60min; Add again copper-phosphorus alloy to carry out deoxidation removal of impurities, melting 40-90min; Finally add zinc and trace element, casting temperature is controlled to 1040-1260 ℃, melting
25-40minobtain liquation, and cover at copper-zinc alloy molten surface the charcoal layer oxygen barrier insulation that 130-170mm is thick; Wherein, in copper-phosphorus alloy, the massfraction of copper accounts for 88-82%, and the massfraction of phosphorus accounts for 12-18%; The mass ratio of electrolytic copper, copper-phosphorus alloy, zinc, trace element is 60-70:0.010-0.013:40-30:0.01-0.02, and trace element is one or more in nickel, arsenic, bismuth, calcium halophosphate activated by antimony andmanganese, selenium;
Be incubated cooling: liquation imports holding furnace by chute and is incubated, after sampling analysis composition is qualified, enter crystallizer crystallisation by cooling, control liquation flow velocity 10-15mm/s, in crystallizer, water of condensation pressure-controlled is at 0.2-0.4Mpa;
Horizontal casting: after liquation crystallization, cast continuously by tractor horizontally tracting, obtain brass pipe blanks, control casting speed 210-280mm/min;
Cutting: brass pipe blanks cuts by the integral type sawing machine with tractor coupling, and length accuracy is controlled at 0-1cm;
Remove zone of oxidation: again through Centreless lathe car surface removal zone of oxidation, control lathe input speed 1700-2500mm/min, discharging speed 1700-2500mm/min, speed of mainshaft 420-540r/min;
Tube rolling annealing: obtain work in-process finally by cutting milling train tube rolling; Work in-process get product through the annealing of through type annealing furnace.
Reasonably casting temp is the prerequisite that guarantees good ingot quality.In certain temperature range, melt temperature is higher, and its viscosity is less, and mobility is better; Otherwise mobility is poorer.But excess Temperature, the air-breathing oxidation of melt is serious, and the ingot casting coarse grains of formation also easily produces the defects such as loose, shrinkage cavity and pore, moreover can increase the scaling loss of Cu and Zn, causes lumber recovery decline.Certainly temperature can not select too low, too low casting temp can make to form prematurely scull near the molten metal of crystallizer wall, if the scull forming afterwards can not fuse together with it well, just can form cold shut; In addition, too low casting temp, can make the mobility variation of melt, and the slag of generation and nonmetallic impurity are difficult for floating, if be bonded at graphite cannula inwall, can make the friction resistance increase of scull surface and graphite inwall, and process of billet withdrawal easily causes transverse fissure.Meanwhile, for extending the work-ing life of casting furnace, casting furnace temperature-rise period needs incremental, is warming up to high temperature if disposable, easily causes the damage to casting furnace.
The technological process of brass pipe blanks horizontal casting comprises: melting, crystallization and traction three road master operations, can melting be the prerequisite that normally produce, and reasonably melting technology just can be produced the copper liquid of high-quality cleaning, and the quality of copper liquid is relevant with raw material order of addition to raw material, in the application, first add electrolytic copper, add again copper-phosphorus alloy, finally add zinc, avoid the volatilization waste that adds too early zinc to cause zinc, guarantee that copper-phosphorus alloy effectively plays the effect of removal of impurities deoxidation, guarantees the best in quality of finished product simultaneously; The copper liquid of high-quality is the basis that obtains well-crystallized tissue, and highly organized pipe is the guarantee of normal traction, and traction program and speed affect again the crystallization and freezing process of pipe conversely, also determine the quality of terminal level continuously cast billet for pipe-making.In order to obtain the pipe of high-quality, must formulate rational melting technology parameter, control crystallisation process and recirculating cooling water system well, select suitable traction program and parameter.
The invention has the advantages that: determined rational casting temperature gradient, guaranteeing under low-loss prerequisite of casting furnace, in progressive temperature-rise period, make copper liquid viscosity, mobility suitable, impurity is few, be difficult for air-breathing oxidation, avoid the loose pore of ingot casting coarse grains of production etc., be convenient to the carrying out of subsequent technique; Add composite trace element, strengthened product mechanical property; And determined rational raw material order of addition, and avoid the waste of raw material, guarantee the quality of finished product; Simplified technique, traditional technology need to repeatedly be carried out annealing and pickling to pipe, and cutting etc. stretches, but because the application makes full use of the advantage of horizontal casting, by horizontal casting and other processing step reasonable combination, after pipe moulding, behind cutting, car surface, directly carry out tube rolling annealing, improved production efficiency, be applicable to industrialization promotion, and interiors of products to organize crystal grain be tiny, uniform equiax crystal, the large high temperature resistance softening intensity of tensile strength is high, and resistance to corrosion is strong.
Specific embodiment
Below in conjunction with specific embodiment, the present invention is described further, to help understanding content of the present invention.
Embodiment 1:
Horizontal casting legal system is for the processing method of bathroom brazed copper tube, and concrete steps are:
Melting: casting furnace is warming up to 130 ℃, insulation 1h, then be warming up to 770 ℃, electrolytic copper is added to casting furnace melting 45min; Add again copper-phosphorus alloy to carry out deoxidation removal of impurities, melting 70min; Finally add zinc and trace element, casting temperature is controlled to 1220 ℃, melting
32minobtain liquation, and cover at copper-zinc alloy molten surface the charcoal layer oxygen barrier insulation that 155mm is thick; Wherein, in copper-phosphorus alloy, the massfraction of copper accounts for 84%, and the massfraction of phosphorus accounts for 16%; The mass ratio of electrolytic copper, copper-phosphorus alloy, zinc, trace element is 65:0.011:35:0.014, and in trace element, the mass ratio of each component is, nickel: bismuth: antimony: manganese: selenium=0.006:0.003:0.002:0.002:0.001;
Be incubated cooling: liquation imports holding furnace by chute and is incubated, after sampling analysis composition is qualified, enter crystallizer crystallisation by cooling, control liquation flow velocity 13mm/s, in crystallizer, water of condensation pressure-controlled is at 0.3Mpa;
Horizontal casting: after liquation crystallization, cast continuously by tractor horizontally tracting, obtain brass pipe blanks, control casting speed 240mm/min;
Cutting: brass pipe blanks cuts by the integral type sawing machine with tractor coupling, and length accuracy is controlled at 0-1cm;
Remove zone of oxidation: again through Centreless lathe car surface removal zone of oxidation, control lathe input speed 2100mm/min, discharging speed 2100mm/min, speed of mainshaft 480r/min;
Tube rolling annealing: obtain work in-process finally by cutting milling train tube rolling; Work in-process get product through the annealing of through type annealing furnace.
Embodiment 2
Horizontal casting legal system is for the processing method of bathroom brazed copper tube, and concrete steps are:
Melting: casting furnace is warming up to 100 ℃, insulation 1h, then be warming up to 700 ℃, electrolytic copper is added to casting furnace melting 30min; Add again copper-phosphorus alloy to carry out deoxidation removal of impurities, melting 40min; Finally add zinc and trace element, casting temperature is controlled to 1040 ℃, melting
40minobtain liquation, and cover at copper-zinc alloy molten surface the charcoal layer oxygen barrier insulation that 130mm is thick; Wherein, in copper-phosphorus alloy, the massfraction of copper accounts for 82%, and the massfraction of phosphorus accounts for 18%; The mass ratio of electrolytic copper, copper-phosphorus alloy, zinc, trace element is 62:0.010:38:0.01, and trace element is nickel;
Be incubated cooling: liquation imports holding furnace by chute and is incubated, after sampling analysis composition is qualified, enter crystallizer crystallisation by cooling, control liquation flow velocity 10mm/s, in crystallizer, water of condensation pressure-controlled is at 0.2Mpa;
Horizontal casting: after liquation crystallization, cast continuously by tractor horizontally tracting, obtain brass pipe blanks, control casting speed 210mm/min;
Cutting: brass pipe blanks cuts by the integral type sawing machine with tractor coupling, and length accuracy is controlled at 0-1cm;
Remove zone of oxidation: again through Centreless lathe car surface removal zone of oxidation, control lathe input speed 1700mm/min, discharging speed 1700mm/min, speed of mainshaft 420r/min;
Tube rolling annealing: obtain work in-process finally by cutting milling train tube rolling; Work in-process get product through the annealing of through type annealing furnace.
Embodiment 3
Horizontal casting legal system is for the processing method of bathroom brazed copper tube, and concrete steps are:
Melting: casting furnace is warming up to 150 ℃, insulation 1h, then be warming up to 800 ℃, electrolytic copper is added to casting furnace melting 60min; Add again copper-phosphorus alloy to carry out deoxidation removal of impurities, melting 90min; Finally add zinc and trace element, casting temperature is controlled to 1260 ℃, melting 25min obtains liquation, and covers at copper-zinc alloy molten surface the charcoal layer oxygen barrier insulation that 170mm is thick; Wherein, in copper-phosphorus alloy, the massfraction of copper accounts for 88%, and the massfraction of phosphorus accounts for 12%; The mass ratio of electrolytic copper, copper-phosphorus alloy, zinc, trace element is 68:0.013:32:0.02, and in trace element, the mass ratio of each component is, nickel: arsenic: bismuth: antimony: manganese: selenium=0.007:0.004:0.003:0.003:0.002:0.001;
Be incubated cooling: liquation imports holding furnace by chute and is incubated, after sampling analysis composition is qualified, enter crystallizer crystallisation by cooling, control liquation flow velocity 15mm/s, in crystallizer, water of condensation pressure-controlled is at 0.4Mpa;
Horizontal casting: after liquation crystallization, cast continuously by tractor horizontally tracting, obtain brass pipe blanks, control casting speed 280mm/min;
Cutting: brass pipe blanks cuts by the integral type sawing machine with tractor coupling, and length accuracy is controlled at 0-1cm;
Remove zone of oxidation: again through Centreless lathe car surface removal zone of oxidation, control lathe input speed 2500mm/min, discharging speed 1700-2500mm/min, speed of mainshaft 540r/min;
Tube rolling annealing: obtain work in-process finally by cutting milling train tube rolling; Work in-process get product through the annealing of through type annealing furnace.
Embodiment 4
Horizontal casting legal system is for the processing method of bathroom brazed copper tube, and concrete steps are:
Melting: casting furnace is warming up to 90 ℃, insulation 1h, then be warming up to 650 ℃, electrolytic copper is added to casting furnace melting 50min; Add again copper-phosphorus alloy to carry out deoxidation removal of impurities, melting 30min; Finally add zinc, casting temperature is controlled to 1000 ℃, melting 20min obtains liquation, and covers at copper-zinc alloy molten surface the charcoal layer oxygen barrier insulation that 110mm is thick; Wherein, in copper-phosphorus alloy, the massfraction of copper accounts for 75%, and the massfraction of phosphorus accounts for 15%; The mass ratio of electrolytic copper, copper-phosphorus alloy, zinc is 60:0.009:40;
Be incubated cooling: liquation imports holding furnace by chute and is incubated, after sampling analysis composition is qualified, enter crystallizer crystallisation by cooling, control liquation flow velocity 8mm/s, in crystallizer, water of condensation pressure-controlled is at 0.15Mpa;
Horizontal casting: after liquation crystallization, cast continuously by tractor horizontally tracting, obtain brass pipe blanks, control casting speed 180mm/min;
Cutting: brass pipe blanks cuts by the integral type sawing machine with tractor coupling, and length accuracy is controlled at 0-1cm;
Remove zone of oxidation: again through Centreless lathe car surface removal zone of oxidation, control lathe input speed 1500mm/min, discharging speed 1500mm/min, speed of mainshaft 360r/min;
Tube rolling annealing: obtain work in-process finally by cutting milling train tube rolling; Work in-process get product through the annealing of through type annealing furnace.
Embodiment 5
Horizontal casting legal system is for the processing method of bathroom brazed copper tube, and concrete steps are:
Melting: casting furnace is warming up to 200 ℃, insulation 1h, then be warming up to 900 ℃, electrolytic copper is added to casting furnace melting 90min; Add again copper-phosphorus alloy to carry out deoxidation removal of impurities, melting 100min; Finally add zinc and trace element, casting temperature is controlled to 1320 ℃, melting 45min obtains liquation, and covers at copper-zinc alloy molten surface the charcoal layer oxygen barrier insulation that 190mm is thick; Wherein, in copper-phosphorus alloy, the massfraction of copper accounts for 95%, and the massfraction of phosphorus accounts for 5%; The mass ratio of electrolytic copper, copper-phosphorus alloy, zinc, trace element is 70:0.015:30:0.032, in trace element, the mass ratio of each component is, nickel: arsenic: bismuth: antimony: manganese: selenium: silicon: boron=0.011:0.005:0.004:0.004:0.003:0.002:0.002:0.001;
Be incubated cooling: liquation imports holding furnace by chute and is incubated, after sampling analysis composition is qualified, enter crystallizer crystallisation by cooling, control liquation flow velocity 20mm/s, in crystallizer, water of condensation pressure-controlled is at 0.5Mpa;
Horizontal casting: after liquation crystallization, cast continuously by tractor horizontally tracting, obtain brass pipe blanks, control casting speed 300mm/min;
Cutting: brass pipe blanks cuts by the integral type sawing machine with tractor coupling, and length accuracy is controlled at 0-1cm;
Remove zone of oxidation: again through Centreless lathe car surface removal zone of oxidation, control lathe input speed 2800mm/min, discharging speed 2800mm/min, speed of mainshaft 580r/min;
Tube rolling annealing: obtain work in-process finally by cutting milling train tube rolling; Work in-process get product through the annealing of through type annealing furnace.
Comparative example 1
Horizontal casting legal system is for the processing method of bathroom brazed copper tube, and concrete steps are:
Melting: casting furnace is warming up to 1220 ℃, adds successively electrolytic copper, copper-phosphorus alloy, zinc, trace element, melting 32min obtains liquation, and cover at copper-zinc alloy molten surface the charcoal layer oxygen barrier insulation that 155mm is thick; Wherein, in copper-phosphorus alloy, the massfraction of copper accounts for 84%, and the massfraction of phosphorus accounts for 16%; The mass ratio of electrolytic copper, copper-phosphorus alloy, zinc, trace element is 65:0.011:35:0.014, and in trace element, the mass ratio of each component is, nickel: bismuth: antimony: manganese: selenium=0.006:0.003:0.002:0.002:0.001;
All the other are with embodiment 1.
Comparative example 2
Upward-casting process is prepared the processing method of bathroom brazed copper tube, and concrete steps are:
Melting: casting furnace is warming up to 130 ℃, insulation 1h, then be warming up to 770 ℃, electrolytic copper, zinc are added to casting furnace melting 45min successively; Casting temperature is controlled to 1220 ℃ again, melting 32min obtains liquation, and covers at copper-zinc alloy molten surface the charcoal layer oxygen barrier insulation that 155mm is thick; Wherein, the mass ratio of electrolytic copper, zinc is 65:35;
Be incubated cooling: liquation imports holding furnace by chute and is incubated, after sampling analysis composition is qualified, enter crystallizer crystallisation by cooling, control liquation flow velocity 13mm/s, in crystallizer, water of condensation pressure-controlled is at 0.3Mpa;
Continuous up-casting: after liquation crystallization, by upwards traction continuous casting of tractor, obtain brass pipe blanks, control lead speed 130mm/min, above drawing pitch is 1mm, above draws that to stop drawing frequency be 130 beats/min, above draws temperature and is controlled at 1000-1200 ℃;
Cutting: brass pipe blanks cuts by the integral type sawing machine with tractor coupling, and length accuracy is controlled at 0-1cm;
Remove zone of oxidation: again through Centreless lathe car surface removal zone of oxidation, control lathe input speed 2100mm/min, discharging speed 2100mm/min, speed of mainshaft 480r/min;
Tube rolling annealing: obtain work in-process finally by cutting milling train tube rolling; Work in-process get product through the annealing of through type annealing furnace.
Test example
Test example 1
Bathroom pipe is higher to dimension precision requirement, chooses that product prepared by embodiment 1-5 and comparative example 1-2 method carries out external diameter and wall thickness detects, and the results are shown in Table 1:
Table 1 external diameter, wall thickness deviation comparison
With reference to GB, the outside diameter tolerance of embodiment 1-5 and comparative example 1, the equal conformance with standard requirement of wall thickness deviation, and comparative example 2 wall thickness deviations are a little more than GB, this may be relevant to its complete processing, and upward-casting process is produced brazed copper tube, because pipe is by upwards traction casting of tractor, due to the liquation self gravitation factor after crystallization, will cause the bottom liquation quality will be higher than top, thereby in traction castingprocesses, can cause pipe wall thickness to exist deviation larger.And horizontal casting method of the present invention is by horizontally tracting crystallization liquation, make each face of pipe stressed evenly, wall thickness, external diameter can be controlled in scope, and precision is higher.By repetition test, we have determined rational processing step and processing parameter, and within the scope of this, quality product and stability thereof have obtained guarantee.From table 1 data, embodiment 1-3 effect is better than embodiment 4-5, comparative example-2, and embodiment 1 effect is optimum.
Test example 2
Adopt the method for embodiment 1 and comparative example 1-2 to prepare brazed copper tube, along brass pipe blanks, axially cut sample and be processed into standard test specimen according to GB/T228-2002, measure pipe tensile strength and unit elongation under different casting conditions.In Table 2:
Table 2 tensile strength and unit elongation comparison
| Group | Tensile strength (Mpa) | Unit elongation (%) |
| Embodiment 1 | 173.7 | 32.4 |
| Embodiment 2 | 162.9 | 22.5 |
| Embodiment 3 | 172.8 | 31.7 |
| Embodiment 4 | 114.9 | 16.1 |
| Embodiment 5 | 157.5 | 21.3 |
| Comparative example 1 | 145.4 | 19.6 |
| Comparative example 2 | 101.6 | 13.4 |
The factors such as the mechanical property of bathroom brazed copper tube and product processing technique, processing parameter, supplementary material and consumption are closely related.The present invention is added to trace element tensile strength and the unit elongation of finding to strengthen to a certain extent brazed copper tube in fusion process, through further test determination, we have finally determined composite trace element prescription and proportioning, adopted gradient increased temperature smelting process, product grains is distributed reasonably simultaneously, strengthen product mechanical property.The processing method that embodiment 1-3 adopts and processing parameter are in rational scope, and embodiment 4 does not add trace element, processing parameter is also lower than minimum extent value, and embodiment 5 has increased micro-kind and consumption, 1 employing of comparative example directly rises to the melting method of outlet temperature, comparative example 2 is not added any auxiliary material, adopt upward-casting process to prepare brazed copper tube, as shown in Table 2, embodiment 1-3 tensile strength and unit elongation are obviously better than embodiment 4 and comparative example 1-2, although embodiment 5 has increased micro-kind and but consumption physical strength does not obviously promote, on the contrary lower than the effect of embodiment 1-3, visible, the composite trace element that the present invention selects and consumption, be aided with rational processing method, can strengthen the mechanical property of product.
Claims (5)
1. horizontal casting legal system, for the processing method of bathroom brazed copper tube, is characterized in that: concrete steps comprise melting, it is cooling to be incubated, horizontal casting, cutting, removal zone of oxidation, tube rolling annealing.
2. horizontal casting legal system, for the processing method of bathroom brazed copper tube, is characterized in that: concrete steps are:
Melting: casting furnace is warming up to 100-150 ℃, insulation 1h, then be warming up to 700-800 ℃, electrolytic copper is added to casting furnace melting 30-60min; Add again copper-phosphorus alloy to carry out deoxidation removal of impurities, melting 40-90min; Finally add zinc and trace element, casting temperature is controlled to 1040-1260 ℃, melting
25-40minobtain liquation, and cover at copper-zinc alloy molten surface the charcoal layer oxygen barrier insulation that 130-170mm is thick; Wherein, in copper-phosphorus alloy, the massfraction of copper accounts for 88-82%, and the massfraction of phosphorus accounts for 12-18%; The mass ratio of electrolytic copper, copper-phosphorus alloy, zinc, trace element is 60-70:0.010-0.013:40-30:0.01-0.02;
Be incubated cooling: liquation imports holding furnace by chute and is incubated, after sampling analysis composition is qualified, enter crystallizer crystallisation by cooling, control liquation flow velocity 10-15mm/s, in crystallizer, water of condensation pressure-controlled is at 0.2-0.4Mpa;
Horizontal casting: after liquation crystallization, cast continuously by tractor horizontally tracting, obtain brass pipe blanks, control casting speed 210-280mm/min;
Cutting: brass pipe blanks cuts by the integral type sawing machine with tractor coupling, and length accuracy is controlled at 0-1cm;
Remove zone of oxidation: again through Centreless lathe car surface removal zone of oxidation, control lathe input speed 1700-2500mm/min, discharging speed 1700-2500mm/min, speed of mainshaft 420-540r/min;
Tube rolling annealing: obtain work in-process finally by cutting milling train tube rolling; Work in-process get product through the annealing of through type annealing furnace.
3. horizontal casting legal system according to claim 2, for the processing method of bathroom brazed copper tube, is characterized in that: trace element is one or more in nickel, arsenic, bismuth, calcium halophosphate activated by antimony andmanganese, selenium.
4. horizontal casting legal system according to claim 2, for the processing method of bathroom brazed copper tube, is characterized in that: concrete steps are:
Melting: casting furnace is warming up to 130 ℃, insulation 1h, then be warming up to 770 ℃, electrolytic copper is added to casting furnace melting 45min; Add again copper-phosphorus alloy to carry out deoxidation removal of impurities, melting 70min; Finally add zinc and trace element, casting temperature is controlled to 1220 ℃, melting
32minobtain liquation, and cover at copper-zinc alloy molten surface the charcoal layer oxygen barrier insulation that 155mm is thick; Wherein, in copper-phosphorus alloy, the massfraction of copper accounts for 84%, and the massfraction of phosphorus accounts for 16%; The mass ratio of electrolytic copper, copper-phosphorus alloy, zinc, trace element is 65:0.011:35:0.014;
Be incubated cooling: liquation imports holding furnace by chute and is incubated, after sampling analysis composition is qualified, enter crystallizer crystallisation by cooling, control liquation flow velocity 13mm/s, in crystallizer, water of condensation pressure-controlled is at 0.3Mpa;
Horizontal casting: after liquation crystallization, cast continuously by tractor horizontally tracting, obtain brass pipe blanks, control casting speed 240mm/min;
Cutting: brass pipe blanks cuts by the integral type sawing machine with tractor coupling, and length accuracy is controlled at 0-1cm;
Remove zone of oxidation: again through Centreless lathe car surface removal zone of oxidation, control lathe input speed 2100mm/min, discharging speed 2100mm/min, speed of mainshaft 480r/min;
Tube rolling annealing: obtain work in-process finally by cutting milling train tube rolling; Work in-process get product through the annealing of through type annealing furnace.
5. horizontal casting legal system according to claim 4, for the processing method of bathroom brazed copper tube, is characterized in that: in trace element, the mass ratio of each component is, nickel: bismuth: antimony: manganese: selenium=0.006:0.003:0.002:0.002:0.001.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103978172A (en) * | 2014-05-29 | 2014-08-13 | 南通天星铸锻有限公司 | Copper alloy casting technology |
| CN104550792A (en) * | 2014-10-17 | 2015-04-29 | 江西鸥迪铜业有限公司 | Horizontal continuous casting copper ingot production technology |
| CN105964965A (en) * | 2016-06-02 | 2016-09-28 | 高原 | Continuous-casting one-step forming process of lock bodies |
| CN106480330A (en) * | 2015-09-01 | 2017-03-08 | 兴化市兴成铜业有限公司 | A kind of processing technology of the high Alpaka of B30 |
| CN108405820A (en) * | 2018-03-23 | 2018-08-17 | 江西鸥迪铜业有限公司 | A kind of horizontal casting Rolling Production brass tube technique |
| 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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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103978172A (en) * | 2014-05-29 | 2014-08-13 | 南通天星铸锻有限公司 | Copper alloy casting technology |
| CN104550792A (en) * | 2014-10-17 | 2015-04-29 | 江西鸥迪铜业有限公司 | Horizontal continuous casting copper ingot production technology |
| CN106480330A (en) * | 2015-09-01 | 2017-03-08 | 兴化市兴成铜业有限公司 | A kind of processing technology of the high Alpaka of B30 |
| CN105964965A (en) * | 2016-06-02 | 2016-09-28 | 高原 | Continuous-casting one-step forming process of lock bodies |
| CN108405820A (en) * | 2018-03-23 | 2018-08-17 | 江西鸥迪铜业有限公司 | A kind of horizontal casting Rolling Production brass tube technique |
| CN108405820B (en) * | 2018-03-23 | 2019-11-26 | 江西鸥迪铜业有限公司 | A kind of horizontal casting Rolling Production brass tube technique |
| 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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