CN104451251B - A kind of high ferro White brass alloy tubing and short-flow production method thereof - Google Patents
A kind of high ferro White brass alloy tubing and short-flow production method thereof Download PDFInfo
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Abstract
A kind of high ferro White brass alloy tubing and short-flow production method thereof, belong to technical field of metal.The White brass alloy BFe10 21 that the present invention provides, compared with BFe10 11 alloy, alloyed iron constituent content is brought up to 1.6 ~ 2.5 wt% by 1.0 ~ 1.5 wt%, decay resistance and the mechanical property of alloy are greatly improved, the present invention uses the preparation of hot cold combination casting mold horizontal continuous casting technology to have high surfaces externally and internally quality, the pipe of high axial orientation columanar structure, and the cold-forming property of high iron white copper is greatly improved；By continuously cast billet for pipe-making direct cold rolling and/or cold drawn shaping, use suitable annealing schedule that tubing is carried out finished products, eliminate microsegregation, control to be 20 ~ 40 μm by recrystal grain average-size, precipitate volume fraction is reduced to less than 2%, to obtain the copper-nickel alloy tubing having excellent mechanical property and decay resistance concurrently.Compared with BFe10 11 tubing that Traditional Method produces, BFe10 21 high ferro copper-nickel alloy tubing has a most excellent comprehensive serviceability, and production procedure is short, production efficiency and lumber recovery height.
Description
Technical field
The invention belongs to technical field of metal, relate to a kind of high ferro copper-nickel alloy tubing and short-flow production method thereof.
Background technology
Iron content White brass alloy (abbreviation iron white copper) tubing has higher intensity, good heat conductivility and corrosion resistance
Can, it is widely used in condensing tube and the heat exchanger tube in the fields such as thermoelectricity, naval vessel, desalinization.Wherein, BFe10-1-1 alloy
Tubing is due to nickel content relatively low (～10wt%), and cost is relatively low, is the iron white copper tubing that industry consumption is maximum at present.Along with China
The fast development of marine industry, proposes the highest requirement to decay resistance, the service life of sea water piping system iron white copper,
Traditional BFe10-1-1 tubing is difficult to meet use requirement.
Put forward the high nickel content BFe30-1-1 alloy of about 30wt% (the such as nickel content be), be remarkably improved iron white copper tubing
Corrosive nature and mechanical property, but heat conductivility decline, the heat conductivity of BFe30-1-1 than BFe10-1-1 decline about 30%,
And due to nickel costly, nickel content is therefore greatly improved and is unfavorable for reducing production cost and large-scale application.
Ferrum and manganese cheap, improves ferrum and Fe content also can obviously improve mechanical property and the corrosion resistance of iron white copper
Can, wherein ferrum element is the most notable to the effect improving alloy property, and the resistant to sea water that especially can increase substantially alloy washes away corruption
Erosion performance.But the decay resistance of the existence form appreciable impact iron white copper that ferrum element is in the base, when ferrum is with Second Phase Precipitation
Or when forming segregation tissue with rich nickel, ferrum, the decay resistance of alloy declines, and ferrum is present in alloy substrate with solid solution state form
Time, [seeing: Wang Weiyong, Li Jianming, Jin Tao, refrigerant system condenser seawater corrosion grinds to be remarkably improved the decay resistance of alloy
Study carefully, Marine engineering, 2009, Vol.31, No.3, p.70 ~ 74].Therefore, if BFe10-1-1(iron content be 1.0～
1.5wt%) alloy improves iron content by a relatively large margin, and the existence form that conservative control ferrum element is in the base, it is to develop low one-tenth
Originally, the effective way of high corrosion resistance iron white copper tubing.
Improving the Second Problem that in iron white copper, iron content causes is, the solution strengthening of alloy and precipitation strength effect increase
By force, the resistance of deformation of iron white copper tubing significantly increases, and work-hardening capacity substantially increases, and plasticity reduces, and causes following process to become
Shape difficulty and lumber recovery are low.At present, the main production process of domestic and international iron white copper tubing is " D.C.casting solid ingot casting hot extrusion
The cold rolling drawing of pipe " technique (be called for short squeeze traction therapy), owing to cold rolling/drawing passes is many, add strip off the skin, pickling, annealing etc.
Intermediate step, total manufacturing procedure reaches more than 20 passage and [sees: Guo Li, Li Yaoqun, condensing tube production technology, p.30 ~ 32, metallurgical work
Industry publishing house, 2007], there is technological process length, energy consumption is big, lumber recovery is low, high in cost of production problem.
The heat cold combination casting mold horizontal casting new technique of the invention such as present invention applicant [see: thank build new etc., a kind of White Copper Tubes
The material cold combination casting mold horizontal continuous casting process of heat and equipment, Chinese invention patent, grant number ZL 201010501407.4, grant date
2010-06-27] larger diameter (more than diameter of phi 50mm) and the tubing of wall thickness (such as more than 5mm), appearance in tubing can be prepared
Face is bright and clean, have high axial orientation columanar structure and the cold-forming property of excellence, it is not necessary to milling face etc. process and can directly carry out greatly
Deflection cold working (such as cold rolling, drawing) shapes.On this basis, it is proposed that use hot cold combination casting mold horizontal continuous casting technology system
Standby copper-nickel alloy pipe, in conjunction with specific following process and annealing process, it is achieved the method that iron white copper tubing short flow high efficiency produces
[see: thank build new etc., a kind of short-flow high-efficiency production method for white brass alloy pipes, Chinese invention patent, grant number ZL
201110064777.0, grant date 2012-10-10], it is called for short continuous casting cold process, have that technological process is short, production efficiency is high,
The features such as lumber recovery height is low with energy consumption.The above-mentioned two patented technology of applicant is used for high ferro copper-nickel alloy tubing produce, can be effective
Solve the problem that difficulty processing is low with lumber recovery, but can not solve to cause obvious microsegregation phenomenon owing to iron content improves, with
And the high adverse effect that tubing decay resistance is brought of precipitated phase content after product annealing, need to propose one and be suitable for
Heat treating regime in high iron white copper.
Summary of the invention
It is an object of the invention to provide a kind of novel high ferro White brass alloy BFe10-2-1, iron content is by BFe10-1-1's
The content that 1.0 ~ 1.5 wt% rise to 1.6 ~ 2.5wt%, nickel and manganese is identical with BFe10-1-1, can increase substantially the power of alloy
Learn performance and decay resistance；Hot cold combination casting mold horizontal casting is used to prepare high ferro copper-nickel alloy pipe, to solve iron content increase
Rear iron white copper poor processability, the problem that lumber recovery is low；Suitable cold working (cold rolling and/or cold drawn) technique and finished product is used to move back
Fire preparing degree, controls recrystallized structure and precipitated phase content, overcomes microsegregation to improve homogeneity of ingredients, make tubing have concurrently well
Mechanical property and decay resistance.A kind of high ferro White brass alloy and high performance pipe short-flow production method thereof are provided, i.e. open
Send out a kind of high ferro White brass alloy BFe10-2-1, use hot cold combination casting mold horizontal continuous casting process to prepare alloy pipe stock, in conjunction with follow-up
Cold working (cold rolling and/or cold drawn) and control annealing process, the high iron white copper preparing decay resistance and excellent in mechanical performance closes
Gold tubing.
A kind of high ferro White brass alloy tubing, alloying component percentage by weight is the electrolytic nickel of 9 ~ 11wt%, percentage by weight
The pure iron of 1.6 ~ 2.5wt%, the pure manganese of percentage by weight 0.5 ~ 1.0wt% and surplus cathode copper.
Described high ferro White brass alloy tubing uses short-flow production method manufacture, specifically comprises the following steps that
(1) electrolytic nickel, pure iron, pure manganese and cathode copper are added in fusing stove, are heated to 1200 ~ 1350 DEG C and melt,
Molten metal liquid proceeds in holding furnace, stands 0.5 ~ 1h, protect meanwhile under conditions of holding furnace temperature is 1200 ~ 1300 DEG C
Logical inert gas shielding in temperature stove.
(2) hot cold combination casting mold horizontal continuous casting process is used to prepare a diameter of Φ 50 ~ 120mm, wall thickness 5 ~ 20mm
Great surface quality, the excellent high ferro copper-nickel alloy pipe of high axial orientation columanar structure, cold-forming property.
(3) pipe is directly carried out cold rolling, total deformation 70% ~ 95%, produce diameter of phi 30 ~ 100mm, wall thickness
The high ferro copper-nickel alloy tubing of all size of 1 ~ 15mm；Cold rolling tubing can carry out low temperature recovery annealing as required, temperature
Spend 300 ~ 500 DEG C, annealing time 1 ~ 2h, then carry out that series winding draws or three draws, one or many dish draws, produce footpath Φ 30mm with
Under, the small dimension high ferro copper-nickel alloy tubing of below wall thickness 2mm, average passage lengthening coefficient 1.1 ~ 1.5, dish pulling rate degree 1 ~ 1000m/
min。
(4) tubing produced in step (3) is carried out finished products, mainly eliminate Deformation structure and microcosmic is inclined
Analysis, controls to be 20 ~ 40 μm, precipitate volume fraction is reduced to less than 2% by recrystal grain average-size, it is thus achieved that
Required performance, and make product have the apparent condition of light, meet actual operation requirements.Suitably annealing temperature be 700 ~
850 DEG C, annealing time is 1 ~ 2h, Annealing Protection atmosphere 2%H2+ surplus N2。
Pattern of fever (casting mold bringing-up section) temperature in the hottest cold combination casting mold horizontal continuous casting process step (2) is 1180-
1350 DEG C, cold mould (water cooling copper sleeve) cooling water flow is 500-1000L/h, and hauling speed is 100-200mm/min.
It is an advantage of the current invention that:
(1) the BFe10-2-1 alloy (iron content is 1.6 ~ 2.5wt%) developed, compared with BFe10-1-1 alloy, alloy becomes
This is essentially identical, and mechanical property and decay resistance (especially seawater scouring corrosion resistant) significantly improve.
(2) use hot cold combination casting mold horizontal continuous casting process to prepare surfaces externally and internally quality is good, dense structure, have high axially
The high ferro copper-nickel alloy pipe of columnar orientation crystalline substance tissue, is greatly improved cold-forming property, solves high ferro BFe10-2-1 copper-nickel alloy and closes
Gold tubular object extruding poor performance, the problem that lumber recovery is low.Copper-nickel alloy pipe prepared by this technique can directly carry out aximal deformation value cold working
Shape (cold rolling, drawing), significantly shorten technological process, reduce energy consumption, improve lumber recovery and production efficiency.
(3) by controlling finished product annealing process, eliminate Deformation structure and the microsegregation of alloy pipe, control recrystallization group
Knit and precipitated phase content, improve homogeneity of ingredients, it is thus achieved that the BFe10-2-1 copper-nickel alloy tubing that comprehensive serviceability is excellent.With commonly
BFe10-1-1 tubing is compared, and BFe10-2-1 copper-nickel alloy tubing resistant to sea water erosion corrosion performance prepared by the present invention improves 30 ~ 40%,
Tensile strength improves 10 ~ 20%, and elongation after fracture and thermal conductivity are essentially identical.
Detailed description of the invention
Embodiment 1: a size of Φ 60 × 3mm BFe10-2-1 White brass alloy straight tube production method
(1) it is the electrolytic nickel of 10.0wt%, the pure iron of percentage by weight 2.0wt%, quality hundred by percentage by weight
Proportion by subtraction is the pure manganese of 1.0wt% and surplus cathode copper adds in fusing stove, is heated to 1250 DEG C and melts, fusing
Molten metal proceed in holding furnace, under conditions of holding furnace temperature is 1200 DEG C, stand 0.5h, simultaneously logical inertia in holding furnace
Gas shield.
(2) the high ferro copper-nickel alloy pipe that hot cold combination casting mold horizontal continuous casting process prepares a diameter of Φ 85 × 10mm is used,
Pattern of fever (casting mold bringing-up section) temperature is 1220 DEG C, and cold mould (water cooling copper sleeve) cooling water flow is 900L/h, traction speed
Degree is 120mm/min.
(3) the three roller periodics that pipe prepared by step (2) carries out 3 passages are cold rolling, it is thus achieved that Φ 60 × 3mm
Alloy pipe, average pass deformation is 40%, and each pass deformation is gradually reduced with rolling pass increase, rolling
Process can not carry out intermediate annealing.
(4) carrying out finished products, annealing temperature 800 DEG C by rolling rear tubing in step (3), annealing time is 1.5h,
Annealing Protection atmosphere 2%H2+ surplus N2, it is therefore an objective to eliminate pipe deformations tissue and microsegregation, tubing after annealing
Recrystal grain average-size is about 35 μm, and precipitate volume fraction is about 1.5%, and pipe performance is as shown in table 1.In table
(including table 2 and table 3) thermal conductivity is the electrical conductivity surveyed according to alloy and Wiedeman-Franz law calculates.With general
Logical BFe10-1-1 tubing is compared, and prepared BFe10-2-1 high ferro copper-nickel alloy tubing resistant to sea water erosion corrosion performance improves 30%, resists
Tensile strength improves 19%, and elongation after fracture and thermal conductivity are essentially identical.
Table 1 BFe10-2-1 and BFe10-1-1 alloy pipe Performance comparision
Embodiment 2: a size of Φ 40 × 2mm BFe10-2-1 copper-nickel alloy straight tube production method
(1) it is the electrolytic nickel of 10.0wt%, the pure iron of percentage by weight 1.8wt%, quality hundred by percentage by weight
Proportion by subtraction is the pure manganese of 1.0wt% and surplus cathode copper adds in fusing stove, is heated to 1250 DEG C and melts, fusing
Molten metal proceed in holding furnace, under conditions of holding furnace temperature is 1200 DEG C, stand 0.5h, simultaneously logical inertia in holding furnace
Gas shield.
(2) the high ferro copper-nickel alloy pipe that hot cold combination casting mold horizontal continuous casting process prepares a diameter of Φ 70 × 8mm is used,
Pattern of fever (casting mold bringing-up section) temperature is 1200 DEG C, and cold mould (water cooling copper sleeve) cooling water flow is 700L/h, traction speed
Degree is 150mm/min.
(3) pipe prepared by step (2) is carried out 4 passage three roller periodics cold rolling, it is thus achieved that Φ 40 × 2mm closes
Gold tubing, average pass deformation 40%, each pass deformation is gradually reduced with rolling pass increase, the operation of rolling
Intermediate annealing can not be carried out.
(4) carrying out finished products, annealing temperature 800 DEG C by rolling rear tubing in step (3), annealing time is 1h,
Annealing Protection atmosphere 2%H2+ surplus N2, it is therefore an objective to eliminate Deformation structure and microsegregation, the tubing after annealing of tubing
Recrystal grain average-size be about 30 μm, precipitate volume fraction is about 1.0%, and pipe performance is as shown in table 2.With
Common BFe10-1-1 tubing is compared, and prepared BFe10-2-1 high ferro copper-nickel alloy tubing resistant to sea water erosion corrosion performance improves 35%,
Tensile strength improves 15%, and elongation after fracture and thermal conductivity are essentially identical.
Table 2 BFe10-2-1 and BFe10-1-1 copper-nickel alloy tubing Performance comparision
Embodiment 3: a size of Φ 15 × 1mm BFe10-2-1 copper-nickel alloy coil pipe production method
(1) it is the electrolytic nickel of 10.0wt%, the pure iron of percentage by weight 1.8wt%, quality hundred by percentage by weight
Proportion by subtraction is the pure manganese of 1.0wt% and surplus cathode copper adds in fusing stove, is heated to 1250 DEG C and melts, fusing
Molten metal proceed in holding furnace, time of repose 0.5h under conditions of holding furnace temperature is 1200 DEG C, simultaneously logical in holding furnace
Inert gas shielding.
(2) the White brass alloy pipe that hot cold combination casting mold horizontal continuous casting process prepares a diameter of Φ 50 × 5mm is used,
Pattern of fever (casting mold bringing-up section) temperature is 1200 DEG C, and cold mould (water cooling copper sleeve) cooling water flow is 600L/h, traction speed
Degree is 150mm/min.
(3) step (2) is prepared pipe, and to carry out large deformation two roller periodic cold rolling, and deflection is 70 ~ 80%.
(4) the cold rolling tubing in step (3) being carried out low temperature recovery annealing, annealing temperature is 400 DEG C, moves back
The fire time is 1h, Annealing Protection atmosphere 2%H2+ surplus N2。
(5) tubing after annealing in step (4) carries out the series winding of 1 ~ 3 passage draw or three draw, deflection
15 ~ 25%, it is therefore an objective to tubing is carried out the finishing before dish draws.
(6) tubing after finishing in step (5) is carried out dish to draw, it is thus achieved that Φ 15 × 1mm alloy pipe, averagely
Passage lengthening coefficient 1.2, dish pulling rate degree 500 m/min.
(7) step (6) mid-game trombone slide material being carried out finished products, annealing temperature 780 DEG C, annealing time is 1h,
Annealing Protection atmosphere 2%H2+ surplus N2, it is therefore an objective to eliminate Deformation structure and microsegregation, the tubing after annealing of tubing
Recrystal grain average-size be about 30 μm, precipitate volume fraction is about 1.2%, and pipe performance is as shown in table 3.With
Common BFe10-1-1 tubing is compared, and prepared BFe10-2-1 White brass alloy tubing resistant to sea water erosion corrosion performance improves 32%,
Tensile strength improves 16%, and elongation after fracture and thermal conductivity are essentially identical.
Table 3 BFe10-2-1 and BFe10-1-1 alloy pipe performance comparison
Claims (2)
1. a high ferro White brass alloy tubing, it is characterised in that alloying component percentage by weight is electrolytic nickel, the weight of 9～11wt%
The amount pure iron of percentage ratio 1.6～2.5wt%, the pure manganese of percentage by weight 0.5～1.0wt% and surplus cathode copper, described high ferro
White brass alloy tubing includes a kind of short-flow production method, and described production method specifically comprises the following steps that
(1) electrolytic nickel, pure iron, pure manganese and cathode copper are added in fusing stove, be heated to 1200～1350 DEG C and melt, fusing
Molten metal proceed in holding furnace, under conditions of holding furnace temperature is 1200～1300 DEG C stand 0.5～1h, meanwhile, insulation
Logical inert gas shielding in stove；
(2) hot cold combination casting mold horizontal continuous casting process is used to prepare a diameter of Φ 50～120mm, the high surface of wall thickness 5～20mm
The high ferro copper-nickel alloy pipe that quality, high axial orientation columanar structure, cold-forming property are excellent；
(3) pipe is directly carried out cold rolling, total deformation 70%～95%, produce diameter of phi 30～100mm, wall thickness 1～15mm
The high ferro copper-nickel alloy tubing of all size；Cold rolling tubing carries out low temperature recovery annealing, temperature 300～500 DEG C, annealing as required
Time 1～2h, then carry out that series winding draws or three draws, one or many dish draws, produce footpath below Φ 30mm, wall thickness below 2mm
Small dimension high ferro copper-nickel alloy tubing, average passage lengthening coefficient 1.1～1.5, dish pulling rate degree 1～1000m/min；
(4) tubing produced in step (3) is carried out finished products, mainly eliminate Deformation structure and microsegregation, will tie again
Brilliant average grain size controls to be 20～40 μm, and precipitate volume fraction is reduced to less than 2%, it is thus achieved that required performance, and
Make product have the apparent condition of light, meet actual operation requirements；Annealing temperature is 700～850 DEG C, annealing time be 1～
2h, Annealing Protection atmosphere 2%H2+ surplus N2.
The short-flow production method of a kind of high ferro White brass alloy tubing, it is characterised in that Qi Zhongre
Pattern of fever temperature in cold combination casting mold horizontal continuous casting process step (2) is 1180-1350 DEG C, and cold mould cooling water flow is 500-
1000L/h, hauling speed is 100-200mm/min.
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105312353B (en) * | 2015-09-18 | 2017-08-08 | 北京科技大学 | A kind of large diameter thin wall copper-nickel alloy tubing short-flow production method |
| CN105195550A (en) * | 2015-10-14 | 2015-12-30 | 北京科技大学 | Short-flow processing method for metal bar |
| CN107716885B (en) * | 2016-08-12 | 2019-09-10 | 北京科技大学 | A kind of copper alloy with high strength and high conductivity band short-flow production method |
| CN109821927B (en) * | 2019-03-28 | 2021-06-29 | 北京科技大学 | Production method of large-diameter white copper pipe |
| CN115505767A (en) * | 2022-09-27 | 2022-12-23 | 江苏隆达超合金股份有限公司 | Manufacturing method of high-plasticity BFe10-1-1 white copper pipe |
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