CN105886832A - Bronze bar and production method thereof - Google Patents
Bronze bar and production method thereof Download PDFInfo
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- CN105886832A CN105886832A CN201610325569.4A CN201610325569A CN105886832A CN 105886832 A CN105886832 A CN 105886832A CN 201610325569 A CN201610325569 A CN 201610325569A CN 105886832 A CN105886832 A CN 105886832A
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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
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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
- C22C9/04—Alloys based on copper with zinc as the next major constituent
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- 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 bronze bar and a production method thereof. The bronze bar comprises, by weight, 4.2%-4.5% of Sn, 4.2%-4.5% of Zn, 3.0%-3.3% of Pb, 0.01%-0.1% of P, 0.07%-0.1% of Fe, 0.1%-0.2% of Co, 0.1%-0.2% of Cr and the balance Cu. A bar blank in a soft state is obtained through smelting, horizontal continuous casting, three passes of skin planing, three passes of drawing and intermediate annealing, a finished product is produced through the method of drawing, skin planing, skin planing, drawing and drawing, and thus the target bronzer bar is obtained. According to the bronze bar and the production method thereof, existing components of C54400 alloy is subjected to optimal design, and the C54400 alloy is added with other microelements; and accordingly, the tensile strength of the bronze bar with the specification being phi 25 mm or above is higher than or equal to 345 Mpa, the elongation rate is larger than or equal to 15%, and the special requirements of the ship and warship manufacturing industry for the material performance are met.
Description
Technical field
Present invention relates particularly to a kind of bronze bar and production method thereof.
Background technology
Free-cutting bronze C54400 bar product has high resiliency and good cutting, is mainly used in communication connector and accurate zero of other industry
Part manufactures such as fields such as lining, axle sleeve, liners.C54400 alloy component range is: Sn:3.5～4.5wt%, Zn:1.5～4.5wt%, Pb:
3.0～4.0wt%, P:0.01～0.50wt%, Fe :≤0.1wt%, Cu be surplus.
C54400 bar uses horizontal casting at present, the method for multi pass drawing produces, and prior art produces Ф 25mm following specification Bar Wire Product product
Mechanical performance can meet use requirement, but requires Ф 25mm above scale rod bar tensile strength >=345Mpa for precision parts manufacturing industry, prolongs
Stretching rate >=15%, the bar that prior art produces, its mechanical performance can not meet use requirement.
Summary of the invention
In place of the deficiencies in the prior art, the invention provides a kind of bronze bar and production method thereof.
The technical scheme that the present invention takes is:
A kind of bronze bar, containing 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 are Cu.
Present invention also offers the production method of a kind of bronze bar, described production method comprises the following steps:
A. melting；
B. horizontal casting, obtains rod base；
C. three passage plane skin, after every time plane skin, the diameter of rod base reduces 0.2～1.0mm；
D. three passage drawing, after every time drawing, the diameter of rod base reduces 0.3～1.5mm；
E. intermediate annealing；
F. finished product uses the method for drawing plane skin plane skin drawing drawing to produce, thus obtains target bronze bar；
The specification of described bronze bar is Ф 25～60mm.
Described step A specifically includes: join in casting furnace by cathode copper, cobalt, chromium, ferrum copper intermediate alloy, covers Linesless charcoal, adds after the fusing that heats up
Entering block tin, spelter, lead, copper phosphorus intermediate alloy, after fusing, slag, sample analysis are dragged in stirring, after meeting the requirement of described each composition, cover calcining
Linesless charcoal.
In described step B, each parameter is respectively as follows: casting temperature 1150～1250 DEG C, hauling speed 6～12mm/s, throwing length 4～12mm, leads
Draw the time 500～2000ms, the anti-length 0.5～2mm that pushes away, the anti-speed 0.2～1.5mm/s that pushes away, counter push away time 200～1000ms, cooling water inflow
3～15m3/h。
In described step E, the temperature of intermediate annealing is 550～650 DEG C, and the heating-up time is 30～60min, and temperature retention time is 120～240min.
A kind of production method of bronze bar, the specification of described bronze bar is Ф 29mm, and described production method comprises the following steps:
A. melting: join in casting furnace by cathode copper, cobalt, chromium, ferrum copper intermediate alloy, covers Linesless charcoal, adds block tin, zinc after the fusing that heats up
Block, lead, copper phosphorus intermediate alloy, after fusing, slag, sample analysis are dragged in stirring, after meeting the requirement of described each composition, cover calcining Linesless charcoal；
B. horizontal casting: casting temperature 1170～1190 DEG C, hauling speed 10mm/s, throwing length 9mm, pull-in time 1000ms, counter push away
Length 1.1mm, anti-speed 1.1mm/s that pushes away, anti-the time 450ms that pushes away, cooling water inflow 6.5m3/ h, obtains Φ 37mm specification rod base；
C. three passage plane skins, 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: the Φ 32.5mm blank after drawing is annealed in trolley type annealing furnace, and temperature is: 630 DEG C, heating-up time 60min,
Temperature retention time is 180min, obtains soft state Φ 32.5mm rod base；
F. the method that finished product uses first drawing to dig skin drawing more again produces: Φ 32.5mm → drawing Φ 31.0mm → plane skin Φ 30.7mm → plane
Skin Φ 30.5mm → drawing Φ 29.5mm → drawing Φ 29mm, thus obtain the bronze bar of Ф 29mm specification.
A kind of production method of bronze bar, the specification of described bronze bar is Ф 34mm, and described production method comprises the following steps:
A. melting: join in casting furnace by cathode copper, cobalt, chromium, ferrum copper intermediate alloy, covers Linesless charcoal, adds block tin, zinc after the fusing that heats up
Block, lead, copper phosphorus intermediate alloy, after fusing, slag, sample analysis are dragged in stirring, after meeting the requirement of described each composition, cover calcining Linesless charcoal；
B. horizontal casting: casting temperature 1170～1190 DEG C, hauling speed 8mm/s, throwing length 7mm, pull-in time 1100ms, counter push away length
Degree 0.8mm, anti-speed 1mm/s that pushes away, anti-the time 500ms that pushes away, cooling water inflow 7.6m3/ h, obtains Φ 42mm specification rod base；
C. three passage plane skins, 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: the Φ 37.5mm blank after drawing is annealed in trolley type annealing furnace, and temperature is: 600 DEG C, heating-up time 40min,
Temperature retention time is 220min, obtains soft state Φ 37.7mm rod base；
F. the method that finished product uses first drawing to dig skin drawing more again produces: 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 specification.
A kind of production method of bronze bar, the specification of described bronze bar is Ф 40mm, and described production method comprises the following steps:
A. melting: join in casting furnace by cathode copper, cobalt, chromium, ferrum copper intermediate alloy, covers Linesless charcoal, adds block tin, zinc after the fusing that heats up
Block, lead, copper phosphorus intermediate alloy, after fusing, slag, sample analysis are dragged in stirring, after meeting the requirement of described each composition, cover calcining Linesless charcoal；
B. horizontal casting: casting temperature 1170～1190 DEG C, hauling speed 7mm/s, throwing length 7mm, pull-in time 1200ms, counter push away length
Degree 0.8mm, anti-speed 0.8mm/s that pushes away, anti-the time 600ms that pushes away, cooling water inflow 9.0m3/ h, obtains Φ 48.5mm specification rod base；
C. three passage plane skins, 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: the Φ 44mm blank after drawing is annealed in trolley type annealing furnace, and temperature is: 650 DEG C, heating-up time 100min, protects
The temperature time is 150min, obtains soft state Φ 43.7mm rod base；
F. the method that finished product uses first drawing to dig skin drawing more again produces: 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 specification.
A kind of production method of bronze bar, the specification of described bronze bar is Ф 52mm, and described production method comprises the following steps:
A. melting: join in casting furnace by cathode copper, cobalt, chromium, ferrum copper intermediate alloy, covers Linesless charcoal, adds block tin, zinc after the fusing that heats up
Block, lead, copper phosphorus intermediate alloy, after fusing, slag, sample analysis are dragged in stirring, after meeting the requirement of described each composition, cover calcining Linesless charcoal；
B. horizontal casting: casting temperature 1170～1190 DEG C, hauling speed 6mm/s, throwing length 6mm, pull-in time 1420ms, counter push away length
Degree 0.7mm, anti-speed 0.75mm/s that pushes away, anti-the time 650ms that pushes away, cooling water inflow 12.3m3/ h, obtains Φ 59.6mm specification rod base；
C. three passage plane skins, 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: the Φ 32.5mm blank after drawing is annealed in trolley type annealing furnace, and temperature is: 560 DEG C, heating-up time 30min,
Temperature retention time is 240min, obtains soft state Φ 55.5mm rod base；
F. the method that finished product uses first drawing to dig skin drawing more again produces: 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 specification.
Produce the bronze bar obtained according to aforementioned production method, its tensile strength reaches more than 345Mpa, and elongation percentage is maintained at more than 15%.
The present invention is optimized design by composition existing to C54400 alloy, is added other trace element, can make the above specification of Ф 25mm
Bronze bar tensile strength >=345Mpa, elongation percentage >=15%, the big specification of C54400 more than Φ 25mm using above-mentioned formula and production technology to prepare
Bar, its tensile strength and elongation percentage are satisfied by the requirement to free-cutting bronze strength of materials index of the precision parts manufacturing industry, solve this material big
The technical barrier that specification product performance is the most up to standard, meets the warship industry particular/special requirement to material property.
Detailed description of the invention
Embodiment 1
A kind of bronze bar, containing following element and percentage by weight: Sn:4.5%, Zn:4.4%, Pb:3.1%, P:0.02%, Fe:0.09%,
Co:0.18%, Cr:0.17%, surplus are Cu.
The production method of described bronze bar comprises the following steps:
A. melting: join in casting furnace by cathode copper, cobalt, chromium, ferrum copper intermediate alloy, covers Linesless charcoal, adds block tin, zinc after the fusing that heats up
Block, lead, copper phosphorus intermediate alloy, after fusing, slag, sample analysis are dragged in stirring, after meeting the requirement of described each composition, cover calcining Linesless charcoal；
B. horizontal casting: casting temperature 1170～1190 DEG C, hauling speed 10mm/s, throwing length 9mm, pull-in time 1000ms, counter push away
Length 1.1mm, anti-speed 1.1mm/s that pushes away, anti-the time 450ms that pushes away, cooling water inflow 6.5m3/ h, obtains Φ 37mm specification rod base；
C. three passage plane skins, 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: the Φ 32.5mm blank after drawing is annealed in trolley type annealing furnace, and temperature is: 630 DEG C, heating-up time 60min,
Temperature retention time is 180min, obtains soft state Φ 32.5mm rod base；
F. the method that finished product uses first drawing to dig skin drawing more again produces: Φ 32.5mm → drawing Φ 31.0mm → plane skin Φ 30.7mm → plane
Skin Φ 30.5mm → drawing Φ 29.5mm → drawing Φ 29mm, thus obtain the bronze bar of Ф 29mm specification.
The C54400 Ф 29mm bronze bar tensile strength produced by this technique reaches more than 380Mpa, and elongation percentage can be maintained at more than 15%.
Embodiment 2
A kind of bronze bar, containing following element and percentage by weight: Sn:4.2%, Zn:4.4%, Pb:3.3%, P:0.05%, Fe:0.07%,
Co:0.12%, Cr:0.16%, surplus are Cu.
The production method of described bronze bar comprises the following steps:
A. melting: join in casting furnace by cathode copper, cobalt, chromium, ferrum copper intermediate alloy, covers Linesless charcoal, adds block tin, zinc after the fusing that heats up
Block, lead, copper phosphorus intermediate alloy, after fusing, slag, sample analysis are dragged in stirring, after meeting the requirement of described each composition, cover calcining Linesless charcoal；
B. horizontal casting: casting temperature 1170～1190 DEG C, hauling speed 8mm/s, throwing length 7mm, pull-in time 1100ms, counter push away length
Degree 0.8mm, anti-speed 1mm/s that pushes away, anti-the time 500ms that pushes away, cooling water inflow 7.6m3/ h, obtains Φ 42mm specification rod base；
C. three passage plane skins, 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: the Φ 37.5mm blank after drawing is annealed in trolley type annealing furnace, and temperature is: 600 DEG C, heating-up time 40min,
Temperature retention time is 220min, obtains soft state Φ 37.7mm rod base；
F. the method that finished product uses first drawing to dig skin drawing more again produces: 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 specification.
The C54400 Ф 34mm bronze bar tensile strength produced by this technique reaches more than 360Mpa, and elongation percentage can be maintained at more than 16%.
Embodiment 3
A kind of bronze bar, containing following element and percentage by weight: Sn:4.3%, Zn:4.4%, Pb:3.3%, P:0.08%, Fe:0.1%,
Co:0.15%, Cr:0.14%, surplus are Cu.
The production method of described bronze bar comprises the following steps:
A. melting: join in casting furnace by cathode copper, cobalt, chromium, ferrum copper intermediate alloy, covers Linesless charcoal, adds block tin, zinc after the fusing that heats up
Block, lead, copper phosphorus intermediate alloy, after fusing, slag, sample analysis are dragged in stirring, after meeting the requirement of described each composition, cover calcining Linesless charcoal；
B. horizontal casting: casting temperature 1170～1190 DEG C, hauling speed 7mm/s, throwing length 7mm, pull-in time 1200ms, counter push away length
Degree 0.8mm, anti-speed 0.8mm/s that pushes away, anti-the time 600ms that pushes away, cooling water inflow 9.0m3/ h, obtains Φ 48.5mm specification rod base；
C. three passage plane skins, 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: the Φ 44mm blank after drawing is annealed in trolley type annealing furnace, and temperature is: 650 DEG C, heating-up time 100min, protects
The temperature time is 150min, obtains soft state Φ 43.7mm rod base；
F. the method that finished product uses first drawing to dig skin drawing more again produces: 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 specification.
The C54400 Ф 40mm bronze bar tensile strength produced by this technique reaches more than 360Mpa, and elongation percentage can be maintained at more than 15%.
Embodiment 4
A kind of bronze bar, containing following element and percentage by weight: Sn:4.2%, Zn:4.3%, Pb:3.2%, P:0.07%, Fe:
0.09%, Co:0.11%, Cr:0.14%, surplus are Cu.
The production method of described bronze bar comprises the following steps:
A. melting: join in casting furnace by cathode copper, cobalt, chromium, ferrum copper intermediate alloy, covers Linesless charcoal, adds block tin, zinc after the fusing that heats up
Block, lead, copper phosphorus intermediate alloy, after fusing, slag, sample analysis are dragged in stirring, after meeting the requirement of described each composition, cover calcining Linesless charcoal；
B. horizontal casting: casting temperature 1170～1190 DEG C, hauling speed 6mm/s, throwing length 6mm, pull-in time 1420ms, counter push away length
Degree 0.7mm, anti-speed 0.75mm/s that pushes away, anti-the time 650ms that pushes away, cooling water inflow 12.3m3/ h, obtains Φ 59.6mm specification rod base；
C. three passage plane skins, 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: the Φ 32.5mm blank after drawing is annealed in trolley type annealing furnace, and temperature is: 560 DEG C, heating-up time 30min,
Temperature retention time is 240min, obtains soft state Φ 55.5mm rod base；
F. the method that finished product uses first drawing to dig skin drawing more again produces: 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 specification.
The C54400 Ф 52mm bronze bar tensile strength produced by this technique reaches more than 345Mpa, and elongation percentage can be maintained at more than 15%.
Embodiment 5
A kind of bronze bar, the element contained and percentage by weight are as implemented shown in 1.
The production method of described bronze bar is same as in Example 2, thus obtains the bronze bar of Ф 34mm specification.
The C54400 Ф 34mm bronze bar tensile strength produced by this technique reaches more than 360Mpa, and elongation percentage can be maintained at more than 16%.
Embodiment 6
A kind of bronze bar, the element contained and percentage by weight are as implemented shown in 2.
The production method of described bronze bar is same as in Example 3, thus obtains the bronze bar of Ф 40mm specification.
The C54400 Ф 40mm bronze bar tensile strength produced by this technique reaches more than 355Mpa, and elongation percentage can be maintained at more than 15%.
Embodiment 7
A kind of bronze bar, the element contained and percentage by weight are as implemented shown in 3.
The production method of described bronze bar is the same as in Example 4, thus obtains the bronze bar of Ф 52mm specification.
The C54400 Ф 52mm bronze bar tensile strength produced by this technique reaches more than 350Mpa, and elongation percentage can be maintained at more than 17%.
Embodiment 8
A kind of bronze bar, the element contained and percentage by weight are as implemented shown in 4.
The production method of described bronze bar is same as in Example 1, thus obtains the bronze bar of Ф 29mm specification.
The C54400 Ф 29mm bronze bar tensile strength produced by this technique reaches more than 365Mpa, and elongation percentage can be maintained at more than 15%.
The above-mentioned detailed description carried out bronze bar and production method thereof with reference to embodiment, is illustrative rather than determinate, can be according to being limited
Determine scope and list several embodiments, therefore changing and modifications under without departing from present general inventive concept, within protection scope of the present invention should being belonged to.
Claims (10)
1. a bronze bar, it is characterised in that described bronze bar contain 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 are Cu.
The production method of bronze bar the most according to claim 1, it is characterised in that described production method comprises the following steps:
A. melting；
B. horizontal casting, obtains rod base；
C. three passage plane skin, after every time plane skin, the diameter of rod base reduces 0.2～1.0mm；
D. three passage drawing, after every time drawing, the diameter of rod base reduces 0.3～1.5mm；
E. intermediate annealing；
F. finished product uses the method for drawing plane skin plane skin drawing drawing to produce, thus obtains target bronze bar；
The specification of described bronze bar is Ф 25～60mm.
Production method the most according to claim 2, it is characterised in that described step A specifically includes: in the middle of cathode copper, cobalt, chromium, ferrum copper
Alloy joins in casting furnace, covers Linesless charcoal, adds block tin, spelter, lead, copper phosphorus intermediate alloy after the fusing that heats up, and after fusing, stirring is dragged for
Slag, sample analysis, after meeting the requirement of described each composition, cover calcining Linesless charcoal.
Production method the most according to claim 2, it is characterised in that in described step B, each parameter is respectively as follows: casting temperature 1150～1250 DEG C,
Hauling speed 6～12mm/s, throwing length 4～12mm, the pull-in time 500～2000ms, the anti-length 0.5～2mm that pushes away, counter push away speed
0.2～1.5mm/s, counter push away the time 200～1000ms, cooling water inflow 3～15m3/h。
5., according to production method according to claim 2, it is characterised in that in described step E, the temperature of intermediate annealing is 550～650 DEG C, rise
The temperature time is 30～120min, and temperature retention time is 120～240min.
The production method of bronze bar the most according to claim 2, it is characterised in that the specification of described bronze bar is Ф 29mm, described production
Method comprises the following steps:
A. melting: join in casting furnace by cathode copper, cobalt, chromium, ferrum copper intermediate alloy, covers Linesless charcoal, adds block tin, zinc after the fusing that heats up
Block, lead, copper phosphorus intermediate alloy, after fusing, slag, sample analysis are dragged in stirring, after meeting the requirement of described each composition, cover calcining wood
Charcoal；
B. horizontal casting: casting temperature 1170～1190 DEG C, hauling speed 10mm/s, throwing length 9mm, pull-in time 1000ms, counter push away
Length 1.1mm, anti-speed 1.1mm/s that pushes away, anti-the time 450ms that pushes away, cooling water inflow 6.5m3/ h, obtains Φ 37mm specification rod base；
C. three passage plane skins, 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: the Φ 32.5mm blank after drawing is annealed in trolley type annealing furnace, and temperature is: 630 DEG C, heating-up time 60min,
Temperature retention time is 180min, obtains soft state Φ 32.5mm rod base；
F. the method that finished product uses first drawing to dig skin drawing more again produces: Φ 32.5mm → drawing Φ 31.0mm → plane skin Φ 30.7mm → plane
Skin Φ 30.5mm → drawing Φ 29.5mm → drawing Φ 29mm, thus obtain the bronze bar of Ф 29mm specification.
The production method of bronze bar the most according to claim 2, it is characterised in that the specification of described bronze bar is Ф 34mm, described production
Method comprises the following steps:
A. melting: join in casting furnace by cathode copper, cobalt, chromium, ferrum copper intermediate alloy, covers Linesless charcoal, adds block tin, zinc after the fusing that heats up
Block, lead, copper phosphorus intermediate alloy, after fusing, slag, sample analysis are dragged in stirring, after meeting the requirement of described each composition, cover calcining wood
Charcoal；
B. horizontal casting: casting temperature 1170～1190 DEG C, hauling speed 8mm/s, throwing length 7mm, pull-in time 1100ms, counter push away length
Degree 0.8mm, anti-speed 1mm/s that pushes away, anti-the time 500ms that pushes away, cooling water inflow 7.6m3/ h, obtains Φ 42mm specification rod base；
C. three passage plane skins, 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: the Φ 37.5mm blank after drawing is annealed in trolley type annealing furnace, and temperature is: 600 DEG C, heating-up time 40min,
Temperature retention time is 220min, obtains soft state Φ 37.7mm rod base；
F. the method that finished product uses first drawing to dig skin drawing more again produces: 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 specification.
The production method of bronze bar the most according to claim 2, it is characterised in that the specification of described bronze bar is Ф 40mm, described production
Method comprises the following steps:
A. melting: join in casting furnace by cathode copper, cobalt, chromium, ferrum copper intermediate alloy, covers Linesless charcoal, adds block tin, zinc after the fusing that heats up
Block, lead, copper phosphorus intermediate alloy, after fusing, slag, sample analysis are dragged in stirring, after meeting the requirement of described each composition, cover calcining wood
Charcoal；
B. horizontal casting: casting temperature 1170～1190 DEG C, hauling speed 7mm/s, throwing length 7mm, pull-in time 1200ms, counter push away length
Degree 0.8mm, anti-speed 0.8mm/s that pushes away, anti-the time 600ms that pushes away, cooling water inflow 9.0m3/ h, obtains Φ 48.5mm specification rod base；
C. three passage plane skins, 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: the Φ 44mm blank after drawing is annealed in trolley type annealing furnace, and temperature is: 650 DEG C, heating-up time 100min, protects
The temperature time is 150min, obtains soft state Φ 43.7mm rod base；
F. the method that finished product uses first drawing to dig skin drawing more again produces: 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 specification.
The production method of bronze bar the most according to claim 2, it is characterised in that the specification of described bronze bar is Ф 52mm, described production
Method comprises the following steps:
A. melting: join in casting furnace by cathode copper, cobalt, chromium, ferrum copper intermediate alloy, covers Linesless charcoal, the addition block tin after melting that heats up,
Spelter, lead, copper phosphorus intermediate alloy, after fusing, slag, sample analysis are dragged in stirring, and after meeting the requirement of described each composition, covering is forged
Burn Linesless charcoal；
B. horizontal casting: casting temperature 1170～1190 DEG C, hauling speed 6mm/s, throwing length 6mm, pull-in time 1420ms, counter push away
Length 0.7mm, anti-speed 0.75mm/s that pushes away, anti-the time 650ms that pushes away, cooling water inflow 12.3m3/ h, obtains Φ 59.6mm specification
Rod base；
C. three passage plane skins, 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: the Φ 32.5mm blank after drawing is annealed in trolley type annealing furnace, and temperature is: 560 DEG C, heating-up time 30min,
Temperature retention time is 240min, obtains soft state Φ 55.5mm rod base；
F. the method that finished product uses first drawing to dig skin drawing more again produces: 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 specification.
10. produce, according to the production method of the bronze bar described in claim 2-9 any one, the bronze bar obtained, it is characterised in that described bronze
The tensile strength of bar reaches more than 345Mpa, and elongation percentage is maintained at more than 15%.
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| CN114737071B (en) * | 2022-04-18 | 2023-02-24 | 宁波金田铜业(集团)股份有限公司 | Preparation method of high-strength tin-phosphor bronze bar |
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