CN105886832B - A kind of bronze bar and its production method - Google Patents

A kind of bronze bar and its production method Download PDF

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Publication number
CN105886832B
CN105886832B CN201610325569.4A CN201610325569A CN105886832B CN 105886832 B CN105886832 B CN 105886832B CN 201610325569 A CN201610325569 A CN 201610325569A CN 105886832 B CN105886832 B CN 105886832B
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bar
time
counter
bronze
push away
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CN105886832A (en
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叶东皇
朱云城
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Anhui Xinke Copper Co Ltd
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Anhui Xinke Copper Co Ltd
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    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C9/00—Alloys based on copper
    • C22C9/02—Alloys based on copper with tin as the next major constituent
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C9/00—Alloys based on copper
    • C22C9/04—Alloys based on copper with zinc as the next major constituent
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
    • C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
    • C22F1/08—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of copper or alloys based thereon

Abstract

The invention discloses a kind of bronze bar and its production method, the bronze bar contains following element and percentage by weight：Sn：4.2~4.5%, Zn：4.2~4.5%, Pb：3.0~3.3%, P：0.01~0.1%, Fe：0.07~0.1%, Co：0.1~0.2%, Cr：0.1~0.2%, surplus Cu；Soft state bar stock is obtained by melting, horizontal casting, three passages plane skin, three passage drawings, intermediate annealing, finished product passes through drawing --- plane skin --- the method production of plane skin --- drawing --- drawing, so as to obtain target bronze bar；The present invention may be such that bronze bar tensile strength >=345Mpa of Ф 25mm above specifications, elongation percentage >=15%, meet particular/special requirement of the warship industry to material property by optimizing design to the existing composition of C54400 alloys, adding other trace elements.

Description

A kind of bronze bar and its production method
Technical field
Present invention relates particularly to a kind of bronze bar and its production method.
Background technology
Free-cutting bronze C54400 bar products have high resiliency and good cutting, be mainly used in communication connector and Other industrial precision parts manufactures such as bushing, axle sleeve, pad field.C54400 alloy component ranges are：Sn：3.5~ 4.5wt%, Zn：1.5~4.5wt%, Pb：3.0~4.0wt%, P：0.01~0.50wt%, Fe：≤ 0.1wt%, Cu is remaining Amount.
C54400 bars at present using horizontal casting, multi pass drawing method production, prior art produce Ф 25mm with Lower specification Bar Wire Product product mechanical performance can meet requirement, but require more than Ф 25mm for precision parts manufacturing industry Scale rod bar tensile strength >=345Mpa, elongation percentage >=15%, the bar of prior art production, its mechanical performance can not meet to make With requiring.
The content of the invention
In view of the deficiencies of the prior art, the invention provides a kind of bronze bar and its production method.
The technical scheme that the present invention takes is：
A kind of bronze bar, contains following element and percentage by weight：Sn：4.2~4.5%, Zn：4.2~4.5%, Pb： 3.0~3.3%, P：0.01~0.1%, Fe：0.07~0.1%, Co：0.1~0.2%, Cr：0.1~0.2%, surplus Cu.
Present invention also offers a kind of production method of bronze bar, the production method comprises the following steps：
A. melting；
B. horizontal casting, bar stock is obtained；
C. three passages plane skin, every time digs 0.2~1.0mm of diameter reduction of bar stock after skin；
D. three passage drawing, the diameter of bar stock reduces by 0.3~1.5mm after every time drawing；
E. intermediate annealing；
F. finished product uses drawing --- plane skin --- the method production of plane skin --- drawing --- drawing, so as to obtain target Bronze bar；
The specification of the bronze bar is 25~60mm of Ф.
The step A is specifically included：Cathode copper, cobalt, chromium, iron copper intermediate alloy are added in casting furnace, cover charcoal, Block tin, spelter, lead, copper phosphorus intermediate alloy are added after heating fusing, is stirred after fusing and drags for slag, sampling analysis, is met described each After the requirement of composition, covering calcining charcoal.
Each parameter is respectively in the step B：1150~1250 DEG C, 6~12mm/s of hauling speed of casting temperature, throwing length Spend 4~12mm, it is 500~2000ms of the pull-in time, counter to push away length 0.5~2mm, it is counter to push away speed 0.2~1.5mm/s, it is counter to push away the time 200~1000ms, 3~15m of cooling water inflow3/h。
The temperature of intermediate annealing is 550~650 DEG C in the step E, and the heating-up time is 30~60min, and soaking time is 120~240min.
A kind of production method of bronze bar, the specification of the bronze bar are Ф 29mm, the production method include with Lower step：
A. melting：Cathode copper, cobalt, chromium, iron copper intermediate alloy are added in casting furnace, charcoal is covered, after heating fusing Block tin, spelter, lead, copper phosphorus intermediate alloy are added, is stirred after fusing and drags for slag, sampling analysis, meet the requirement of each composition Afterwards, covering calcining charcoal；
B. horizontal casting：1170~1190 DEG C, hauling speed 10mm/s, throwing length 9mm of casting temperature, pull-in time 1000ms, it is counter to push away length 1.1mm, it is counter to push away speed 1.1mm/s, it is counter to push away time 450ms, cooling water inflow 6.5m3/ h, obtain Φ 37mm Specification bar stock；
C. three passages plane skin, Φ 37mm → Φ 36.3mm → Φ 35.7mm → Φ 35.5mm；
D. three passage drawing, Φ 35.5mm → Φ 34mm → Φ 33mm → Φ 32.5mm；
E. intermediate annealing：Φ 32.5mm blanks after drawing are annealed in trolley type annealing furnace, and temperature is：630 DEG C, heating Time 60min, soaking time 180min, obtain soft state Φ 32.5mm bar stocks；
F. finished product digs the method production of skin and then drawing again using first drawing again：Φ 32.5mm → drawing Φ 31.0mm → plane Skin Φ 30.7mm → plane skin Φ 30.5mm → drawing Φ 29.5mm → drawing Φ 29mm, so as to obtain the bronze bar of Ф 29mm specifications Material.
A kind of production method of bronze bar, the specification of the bronze bar are Ф 34mm, the production method include with Lower step：
A. melting：Cathode copper, cobalt, chromium, iron copper intermediate alloy are added in casting furnace, charcoal is covered, after heating fusing Block tin, spelter, lead, copper phosphorus intermediate alloy are added, is stirred after fusing and drags for slag, sampling analysis, meet the requirement of each composition Afterwards, covering calcining charcoal；
B. horizontal casting：1170~1190 DEG C, hauling speed 8mm/s, throwing length 7mm of casting temperature, pull-in time 1100ms, it is counter to push away length 0.8mm, it is counter to push away speed 1mm/s, it is counter to push away time 500ms, cooling water inflow 7.6m3/ h, obtain Φ 42mm rule Lattice bar stock；
C. three passages plane skin, Φ 42mm → Φ 41.2mm → Φ 40.6mm → Φ 40.4mm；
D. three passage drawing, Φ 40.4mm → Φ 39.0mm → Φ 38.0mm → Φ 37.5mm；
E. intermediate annealing：Φ 37.5mm blanks after drawing are annealed in trolley type annealing furnace, and temperature is：600 DEG C, heating Time 40min, soaking time 220min, obtain soft state Φ 37.7mm bar stocks；
F. finished product digs the method production of skin and then drawing again using first drawing again：Φ 37.7mm → drawing Φ 36.0mm → plane Skin Φ 35.7mm → plane skin Φ 35.5mm → drawing Φ 34.5mm → drawing Φ 34mm, and obtain the bronze bar of Ф 34mm specifications Material.
A kind of production method of bronze bar, the specification of the bronze bar are Ф 40mm, the production method include with Lower step：
A. melting：Cathode copper, cobalt, chromium, iron copper intermediate alloy are added in casting furnace, charcoal is covered, after heating fusing Block tin, spelter, lead, copper phosphorus intermediate alloy are added, is stirred after fusing and drags for slag, sampling analysis, meet the requirement of each composition Afterwards, covering calcining charcoal；
B. horizontal casting：1170~1190 DEG C, hauling speed 7mm/s, throwing length 7mm of casting temperature, pull-in time 1200ms, it is counter to push away length 0.8mm, it is counter to push away speed 0.8mm/s, it is counter to push away time 600ms, cooling water inflow 9.0m3/ h, obtains Φ 48.5mm specification bar stock；
C. three passages plane skin, Φ 48.5mm → Φ 47.5mm → Φ 47.0mm → Φ 46.7mm；
D. three passage drawing, Φ 46.7mm → Φ 45.2mm → Φ 44.2mm → Φ 43.7mm；
E. intermediate annealing：Φ 44mm blanks after drawing are annealed in trolley type annealing furnace, and temperature is：650 DEG C, during heating Between 100min, soaking time 150min, obtain soft state Φ 43.7mm bar stocks；
F. finished product digs the method production of skin and then drawing again using first drawing again：Φ 43.7mm → drawing Φ 42.2mm → plane Skin Φ 41.7mm → plane skin Φ 41.5mm → drawing Φ 40.5mm → drawing Φ 40mm, and obtain the bronze bar of Ф 40mm specifications Material.
A kind of production method of bronze bar, the specification of the bronze bar are Ф 52mm, the production method include with Lower step：
A. melting：Cathode copper, cobalt, chromium, iron copper intermediate alloy are added in casting furnace, charcoal is covered, after heating fusing Block tin, spelter, lead, copper phosphorus intermediate alloy are added, is stirred after fusing and drags for slag, sampling analysis, meet the requirement of each composition Afterwards, covering calcining charcoal；
B. horizontal casting：1170~1190 DEG C, hauling speed 6mm/s, throwing length 6mm of casting temperature, pull-in time 1420ms, it is counter to push away length 0.7mm, it is counter to push away speed 0.75mm/s, it is counter to push away time 650ms, cooling water inflow 12.3m3/ h, obtains Φ 59.6mm specification bar stock；
C. three passages plane skin, Φ 59.6mm → Φ 58.7mm → Φ 58.2mm → Φ 58.5mm；
D. three passage drawing, Φ 58.5mm → Φ 57.0mm → Φ 56.0mm → Φ 55.5mm；
E. intermediate annealing：Φ 32.5mm blanks after drawing are annealed in trolley type annealing furnace, and temperature is：560 DEG C, heating Time 30min, soaking time 240min, obtain soft state Φ 55.5mm bar stocks；
F. finished product digs the method production of skin and then drawing again using first drawing again：Φ 55.5mm → drawing Φ 54.2mm → plane Skin Φ 53.7mm → plane skin Φ 53.5mm → drawing Φ 52.5mm → drawing Φ 52mm, and obtain the bronze bar of Ф 52mm specifications Material.
The bronze bar for producing to obtain according to aforementioned production method, its tensile strength reach more than 345Mpa, and elongation percentage is protected Hold more than 15%.
The present invention may be such that Ф by optimizing design to the existing composition of C54400 alloys, adding other trace elements Bronze bar tensile strength >=345Mpa of more than 25mm specifications, elongation percentage >=15%, using above-mentioned formula and production technology system Standby C54400 Φ 25mm above large scale rod bars, its tensile strength and elongation percentage are satisfied by precision parts manufacturing industry to easily cutting The requirement of bronze material intensity index is cut, material larger product performance technical barrier not up to standard is solved, meets naval vessel Particular/special requirement of the manufacturing industry to material property.
Embodiment
Embodiment 1
A kind of bronze bar, contains following element and percentage by weight：Sn：4.5%th, Zn：4.4%th, Pb：3.1%th, P： 0.02%th, Fe：0.09%th, Co：0.18%th, Cr：0.17%th, surplus Cu.
The production method of the bronze bar comprises the following steps：
A. melting：Cathode copper, cobalt, chromium, iron copper intermediate alloy are added in casting furnace, charcoal is covered, after heating fusing Block tin, spelter, lead, copper phosphorus intermediate alloy are added, is stirred after fusing and drags for slag, sampling analysis, meet the requirement of each composition Afterwards, covering calcining charcoal；
B. horizontal casting：1170~1190 DEG C, hauling speed 10mm/s, throwing length 9mm of casting temperature, pull-in time 1000ms, it is counter to push away length 1.1mm, it is counter to push away speed 1.1mm/s, it is counter to push away time 450ms, cooling water inflow 6.5m3/ h, obtain Φ 37mm Specification bar stock；
C. three passages plane skin, Φ 37mm → Φ 36.3mm → Φ 35.7mm → Φ 35.5mm；
D. three passage drawing, Φ 35.5mm → Φ 34mm → Φ 33mm → Φ 32.5mm；
E. intermediate annealing：Φ 32.5mm blanks after drawing are annealed in trolley type annealing furnace, and temperature is：630 DEG C, heating Time 60min, soaking time 180min, obtain soft state Φ 32.5mm bar stocks；
F. finished product digs the method production of skin and then drawing again using first drawing again：Φ 32.5mm → drawing Φ 31.0mm → plane Skin Φ 30.7mm → plane skin Φ 30.5mm → drawing Φ 29.5mm → drawing Φ 29mm, so as to obtain the bronze bar of Ф 29mm specifications Material.
Reach more than 380Mpa by the C54400 Ф 29mm bronze bar tensile strength of this technique productions, elongation percentage can be kept More than 15%.
Embodiment 2
A kind of bronze bar, contains following element and percentage by weight：Sn：4.2%th, Zn：4.4%th, Pb：3.3%th, P： 0.05%th, Fe：0.07%th, Co：0.12%th, Cr：0.16%th, surplus Cu.
The production method of the bronze bar comprises the following steps：
A. melting：Cathode copper, cobalt, chromium, iron copper intermediate alloy are added in casting furnace, charcoal is covered, after heating fusing Block tin, spelter, lead, copper phosphorus intermediate alloy are added, is stirred after fusing and drags for slag, sampling analysis, meet the requirement of each composition Afterwards, covering calcining charcoal；
B. horizontal casting：1170~1190 DEG C, hauling speed 8mm/s, throwing length 7mm of casting temperature, pull-in time 1100ms, it is counter to push away length 0.8mm, it is counter to push away speed 1mm/s, it is counter to push away time 500ms, cooling water inflow 7.6m3/ h, obtain Φ 42mm rule Lattice bar stock；
C. three passages plane skin, Φ 42mm → Φ 41.2mm → Φ 40.6mm → Φ 40.4mm；
D. three passage drawing, Φ 40.4mm → Φ 39.0mm → Φ 38.0mm → Φ 37.5mm；
E. intermediate annealing：Φ 37.5mm blanks after drawing are annealed in trolley type annealing furnace, and temperature is：600 DEG C, heating Time 40min, soaking time 220min, obtain soft state Φ 37.7mm bar stocks；
F. finished product digs the method production of skin and then drawing again using first drawing again：Φ 37.7mm → drawing Φ 36.0mm → plane Skin Φ 35.7mm → plane skin Φ 35.5mm → drawing Φ 34.5mm → drawing Φ 34mm, and obtain the bronze bar of Ф 34mm specifications Material.
Reach more than 360Mpa by the C54400 Ф 34mm bronze bar tensile strength of this technique productions, elongation percentage can be kept More than 16%.
Embodiment 3
A kind of bronze bar, contains following element and percentage by weight：Sn：4.3%th, Zn：4.4%th, Pb：3.3%th, P： 0.08%th, Fe：0.1%th, Co：0.15%th, Cr：0.14%th, surplus Cu.
The production method of the bronze bar comprises the following steps：
A. melting：Cathode copper, cobalt, chromium, iron copper intermediate alloy are added in casting furnace, charcoal is covered, after heating fusing Block tin, spelter, lead, copper phosphorus intermediate alloy are added, is stirred after fusing and drags for slag, sampling analysis, meet the requirement of each composition Afterwards, covering calcining charcoal；
B. horizontal casting：1170~1190 DEG C, hauling speed 7mm/s, throwing length 7mm of casting temperature, pull-in time 1200ms, it is counter to push away length 0.8mm, it is counter to push away speed 0.8mm/s, it is counter to push away time 600ms, cooling water inflow 9.0m3/ h, obtains Φ 48.5mm specification bar stock；
C. three passages plane skin, Φ 48.5mm → Φ 47.5mm → Φ 47.0mm → Φ 46.7mm；
D. three passage drawing, Φ 46.7mm → Φ 45.2mm → Φ 44.2mm → Φ 43.7mm；
E. intermediate annealing：Φ 44mm blanks after drawing are annealed in trolley type annealing furnace, and temperature is：650 DEG C, during heating Between 100min, soaking time 150min, obtain soft state Φ 43.7mm bar stocks；
F. finished product digs the method production of skin and then drawing again using first drawing again：Φ 43.7mm → drawing Φ 42.2mm → plane Skin Φ 41.7mm → plane skin Φ 41.5mm → drawing Φ 40.5mm → drawing Φ 40mm, and obtain the bronze bar of Ф 40mm specifications Material.
Reach more than 360Mpa by the C54400 Ф 40mm bronze bar tensile strength of this technique productions, elongation percentage can be kept More than 15%.
Embodiment 4
A kind of bronze bar, contains following element and percentage by weight：Sn：4.2%th, Zn：4.3%th, Pb：3.2%th, P： 0.07%th, Fe：0.09%th, Co：0.11%th, Cr：0.14%th, surplus Cu.
The production method of the bronze bar comprises the following steps：
A. melting：Cathode copper, cobalt, chromium, iron copper intermediate alloy are added in casting furnace, charcoal is covered, after heating fusing Block tin, spelter, lead, copper phosphorus intermediate alloy are added, is stirred after fusing and drags for slag, sampling analysis, meet the requirement of each composition Afterwards, covering calcining charcoal；
B. horizontal casting：1170~1190 DEG C, hauling speed 6mm/s, throwing length 6mm of casting temperature, pull-in time 1420ms, it is counter to push away length 0.7mm, it is counter to push away speed 0.75mm/s, it is counter to push away time 650ms, cooling water inflow 12.3m3/ h, obtains Φ 59.6mm specification bar stock；
C. three passages plane skin, Φ 59.6mm → Φ 58.7mm → Φ 58.2mm → Φ 58.5mm；
D. three passage drawing, Φ 58.5mm → Φ 57.0mm → Φ 56.0mm → Φ 55.5mm；
E. intermediate annealing：Φ 32.5mm blanks after drawing are annealed in trolley type annealing furnace, and temperature is：560 DEG C, heating Time 30min, soaking time 240min, obtain soft state Φ 55.5mm bar stocks；
F. finished product digs the method production of skin and then drawing again using first drawing again：Φ 55.5mm → drawing Φ 54.2mm → plane Skin Φ 53.7mm → plane skin Φ 53.5mm → drawing Φ 52.5mm → drawing Φ 52mm, and obtain the bronze bar of Ф 52mm specifications Material.
Reach more than 345Mpa by the C54400 Ф 52mm bronze bar tensile strength of this technique productions, elongation percentage can be kept More than 15%.
Embodiment 5
A kind of bronze bar, the element and percentage by weight contained is as implemented shown in 1.
The production method of the bronze bar is same as Example 2, so as to obtain the bronze bar of Ф 34mm specifications.
Reach more than 360Mpa by the C54400 Ф 34mm bronze bar tensile strength of this technique productions, elongation percentage can be kept More than 16%.
Embodiment 6
A kind of bronze bar, the element and percentage by weight contained is as implemented shown in 2.
The production method of the bronze bar is same as Example 3, so as to obtain the bronze bar of Ф 40mm specifications.
Reach more than 355Mpa by the C54400 Ф 40mm bronze bar tensile strength of this technique productions, elongation percentage can be kept More than 15%.
Embodiment 7
A kind of bronze bar, the element and percentage by weight contained is as implemented shown in 3.
The production method of the bronze bar is same as Example 4, so as to obtain the bronze bar of Ф 52mm specifications.
Reach more than 350Mpa by the C54400 Ф 52mm bronze bar tensile strength of this technique productions, elongation percentage can be kept More than 17%.
Embodiment 8
A kind of bronze bar, the element and percentage by weight contained is as implemented shown in 4.
The production method of the bronze bar is same as Example 1, so as to obtain the bronze bar of Ф 29mm specifications.
Reach more than 365Mpa by the C54400 Ф 29mm bronze bar tensile strength of this technique productions, elongation percentage can be kept More than 15%.
The above-mentioned detailed description carried out with reference to embodiment to bronze bar and its production method is illustrative rather than limit Qualitatively, several embodiments, therefore the change in the case where not departing from present general inventive concept can be included according to limited scope And modification, it should belong within protection scope of the present invention.

Claims (8)

1. a kind of bronze bar, it is characterised in that the bronze bar contains following element and percentage by weight：Sn：4.2~ 4.5%th, Zn：4.2~4.5%, Pb：3.0~3.3%, P：0.01~0.1%, Fe：0.07~0.1%, Co：0.1~0.2%, Cr：0.1~0.2%, surplus Cu；
The production method of described bronze bar comprises the following steps：
A. melting；
B. horizontal casting, bar stock is obtained；
C. three passages plane skin, every time digs 0.2~1.0mm of diameter reduction of bar stock after skin；
D. three passage drawing, the diameter of bar stock reduces by 0.3~1.5mm after every time drawing；
E. intermediate annealing；
F. finished product uses drawing --- plane skin --- the method production of plane skin --- drawing --- drawing, so as to obtain target bronze Bar；
The specification of the bronze bar is 25~60mm of Ф；
The temperature of intermediate annealing is 550~650 DEG C in the step E, and the heating-up time is 30~120min, soaking time 120 ~240min.
2. bronze bar according to claim 1, it is characterised in that the step A is specifically included：By cathode copper, cobalt, Chromium, iron copper intermediate alloy are added in casting furnace, cover charcoal, added after heating fusing block tin, spelter, lead, among copper phosphorus Alloy, stirred after fusing and drag for slag, sampling analysis, after the requirement for meeting each composition, covering calcining charcoal.
3. bronze bar according to claim 1, it is characterised in that each parameter is respectively in the step B：Casting temperature It is 1150~1250 DEG C, 6~12mm/s of hauling speed, throwing 4~12mm of length, 500~2000ms of the pull-in time, counter to push away length 0.5~2mm, it is counter to push away speed 0.2~1.5mm/s, it is counter to push away 200~1000ms of time, 3~15m of cooling water inflow3/h。
4. bronze bar according to claim 1, it is characterised in that the specification of the bronze bar is Ф 29mm, described Production method comprises the following steps：
A. melting：Cathode copper, cobalt, chromium, iron copper intermediate alloy are added in casting furnace, charcoal is covered, is added after heating fusing Block tin, spelter, lead, copper phosphorus intermediate alloy, stirred after fusing and drag for slag, sampling analysis, after the requirement for meeting each composition, covering is forged Burn charcoal；
B. horizontal casting：1170~1190 DEG C, hauling speed 10mm/s, throwing length 9mm of casting temperature, pull-in time 1000ms, it is counter to push away length 1.1mm, it is counter to push away speed 1.1mm/s, it is counter to push away time 450ms, cooling water inflow 6.5m3/ h, obtain Φ 37mm Specification bar stock；
C. three passages plane skin, Φ 37mm → Φ 36.3mm → Φ 35.7mm → Φ 35.5mm；
D. three passage drawing, Φ 35.5mm → Φ 34mm → Φ 33mm → Φ 32.5mm；
E. intermediate annealing：Φ 32.5mm blanks after drawing are annealed in trolley type annealing furnace, and temperature is：630 DEG C, the heating-up time 60min, soaking time 180min, obtain soft state Φ 32.5mm bar stocks；
F. finished product digs the method production of skin and then drawing again using first drawing again：Φ 32.5mm → drawing Φ 31.0mm → plane skin Φ 30.7mm → plane skin Φ 30.5mm → drawing Φ 29.5mm → drawing Φ 29mm, so as to obtain the bronze bar of Ф 29mm specifications.
5. bronze bar according to claim 1, it is characterised in that the specification of the bronze bar is Ф 34mm, described Production method comprises the following steps：
A. melting：Cathode copper, cobalt, chromium, iron copper intermediate alloy are added in casting furnace, charcoal is covered, is added after heating fusing Block tin, spelter, lead, copper phosphorus intermediate alloy, stirred after fusing and drag for slag, sampling analysis, after the requirement for meeting each composition, covering is forged Burn charcoal；
B. horizontal casting：1170~1190 DEG C, hauling speed 8mm/s of casting temperature, throwing length 7mm, pull-in time 1100ms, It is counter to push away length 0.8mm, it is counter to push away speed 1mm/s, it is counter to push away time 500ms, cooling water inflow 7.6m3/ h, obtain Φ 42mm specification bar stocks；
C. three passages plane skin, Φ 42mm → Φ 41.2mm → Φ 40.6mm → Φ 40.4mm；
D. three passage drawing, Φ 40.4mm → Φ 39.0mm → Φ 38.0mm → Φ 37.5mm；
E. intermediate annealing：Φ 37.5mm blanks after drawing are annealed in trolley type annealing furnace, and temperature is：600 DEG C, the heating-up time 40min, soaking time 220min, obtain soft state Φ 37.7mm bar stocks；
F. finished product digs the method production of skin and then drawing again using first drawing again：Φ 37.7mm → drawing Φ 36.0mm → plane skin Φ 35.7mm → plane skin Φ 35.5mm → drawing Φ 34.5mm → drawing Φ 34mm, and obtain the bronze bar of Ф 34mm specifications.
6. bronze bar according to claim 1, it is characterised in that the specification of the bronze bar is Ф 40mm, described Production method comprises the following steps：
A. melting：Cathode copper, cobalt, chromium, iron copper intermediate alloy are added in casting furnace, charcoal is covered, is added after heating fusing Block tin, spelter, lead, copper phosphorus intermediate alloy, stirred after fusing and drag for slag, sampling analysis, after the requirement for meeting each composition, covering is forged Burn charcoal；
B. horizontal casting：1170~1190 DEG C, hauling speed 7mm/s of casting temperature, throwing length 7mm, pull-in time 1200ms, It is counter to push away length 0.8mm, it is counter to push away speed 0.8mm/s, it is counter to push away time 600ms, cooling water inflow 9.0m3/ h, obtain Φ 48.5mm specifications Bar stock；
C. three passages plane skin, Φ 48.5mm → Φ 47.5mm → Φ 47.0mm → Φ 46.7mm；
D. three passage drawing, Φ 46.7mm → Φ 45.2mm → Φ 44.2mm → Φ 43.7mm；
E. intermediate annealing：Φ 44mm blanks after drawing are annealed in trolley type annealing furnace, and temperature is：650 DEG C, the heating-up time 100min, soaking time 150min, obtain soft state Φ 43.7mm bar stocks；
F. finished product digs the method production of skin and then drawing again using first drawing again：Φ 43.7mm → drawing Φ 42.2mm → plane skin Φ 41.7mm → plane skin Φ 41.5mm → drawing Φ 40.5mm → drawing Φ 40mm, and obtain the bronze bar of Ф 40mm specifications.
7. bronze bar according to claim 1, it is characterised in that the specification of the bronze bar is Ф 52mm, described Production method comprises the following steps：
A. melting：Cathode copper, cobalt, chromium, iron copper intermediate alloy are added in casting furnace, charcoal is covered, is added after heating fusing Block tin, spelter, lead, copper phosphorus intermediate alloy, stirred after fusing and drag for slag, sampling analysis, after the requirement for meeting each composition, covering is forged Burn charcoal；
B. horizontal casting：1170~1190 DEG C, hauling speed 6mm/s of casting temperature, throwing length 6mm, pull-in time 1420ms, It is counter to push away length 0.7mm, it is counter to push away speed 0.75mm/s, it is counter to push away time 650ms, cooling water inflow 12.3m3/ h, obtain Φ 59.6mm rule Lattice bar stock；
C. three passages plane skin, Φ 59.6mm → Φ 58.7mm → Φ 58.2mm → Φ 58.5mm；
D. three passage drawing, Φ 58.5mm → Φ 57.0mm → Φ 56.0mm → Φ 55.5mm；
E. intermediate annealing：Φ 32.5mm blanks after drawing are annealed in trolley type annealing furnace, and temperature is：560 DEG C, the heating-up time 30min, soaking time 240min, obtain soft state Φ 55.5mm bar stocks；
F. finished product digs the method production of skin and then drawing again using first drawing again：Φ 55.5mm → drawing Φ 54.2mm → plane skin Φ 53.7mm → plane skin Φ 53.5mm → drawing Φ 52.5mm → drawing Φ 52mm, and obtain the bronze bar of Ф 52mm specifications.
8. according to the bronze bar described in claim 1-7 any one, it is characterised in that the tensile strength of the bronze bar Reach more than 345MPa, elongation percentage is maintained at more than 15%.
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CN107447126B (en) * 2017-08-23 2018-11-23 中色奥博特铜铝业有限公司 A kind of Cu-Ni-Sn-Mn-P-Zn copper alloy and preparation method thereof
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