CN102329981A - High-tensile property brass band for lamp holder and production process thereof - Google Patents

High-tensile property brass band for lamp holder and production process thereof Download PDF

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Publication number
CN102329981A
CN102329981A CN201110282477A CN201110282477A CN102329981A CN 102329981 A CN102329981 A CN 102329981A CN 201110282477 A CN201110282477 A CN 201110282477A CN 201110282477 A CN201110282477 A CN 201110282477A CN 102329981 A CN102329981 A CN 102329981A
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lamp holder
brass
brass band
finished product
high stretch
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CN102329981B (en
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黄咸胜
何凡
汤昌东
吴宏保
胡仰乾
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Qingyuan Chujiang High Precision Copper Strip Co ltd
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Anhui Jingcheng Copper Co Ltd
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Abstract

The invention discloses a high-tensile property brass band for a lamp holder and a production process thereof. The brass band comprises the following components in percentage by weight: less than or equal to 0.01 percent of lead, less than or equal to 0.02 percent of iron, less than or equal to 0.02 percent of tin, less than or equal to 0.02 percent of nickel, 0.001 to 0.003 percent of phosphor, 63.0 to 64.5 percent of copper, and the balance of zinc. Compared with the prior art, the high-tensile property brass band has the advantages that: the produced high-tensile property brass band for a lamp holder can fulfill the requirement for excellent plasticity in a lamp holder forming process, and prevent pitted surface of a product which is subjected to deep tension from influencing the appearance and yield by reasonably controlling the content of impure elements, grain sizes of finished products and deep drawability.

Description

Lamp holder can brass band and production technique thereof with high stretch
Technical field:
The invention belongs to brass band and production technique thereof, belonging to lamp holder especially can brass band and production technique thereof with high stretch.
Background technology:
Brass has good processing properties and conduction, heat conductivility, and color and luster good (being close to the gold color and luster), in the copper strips alloy, uses very extensively, and it generally is used for hot-water heating sanitary equipment, five metals towards industries such as part, the auxilliary decoration of clothes, electrical accessories; Because its inherent element component content is different; The brass trade mark also has a lot; Aspects such as each trade mark brass mechanical property, processing characteristics also there are differences, and produce lamp holder on the just present industry and are mainly H62 and the H65 processing brass of thickness between 0.15~0.40mm with brass band, and its composition is as showing-1:
Table-1 GB/T 5231-2001 (processing brass chemical ingredients)
Figure BDA0000093265820000011
The main production process of lamp holder product is blanking, deep-draw, rolled thread, side cut etc.; Stretch because lamp holder formed product process experiences the continuous degree of depth, and after stretching, arrange the rolled thread operation, therefore require high material plasticity; Simultaneously because high-grade lamp holder product is higher to surperficial specification of quality; Especially true qualities product (finished product does not carry out electroplating processes) requires any surface finish, light, smooth, even the surface exists slight defect also possibly cause degradation to be handled; Simultaneously; The grain fineness number of brass has bigger influence to its cold-forming property, and mechanical property and cold deformation performance after the brass annealing depend primarily on grain-size, often under the prerequisite of pursuing moulding property of material, cause crystal grain thick easily; Cause finished product the pitted skin phenomenon to occur, have a strong impact on final product quality.
Summary of the invention:
The 1st technical problem to be solved by this invention is: provide a kind of and can satisfy the requirement of moulding plasticity, the lamp holder that is unlikely to again to cause the finished product pitted skin is with high stretch ability brass band;
The 2nd technical problem to be solved by this invention is: the control method of the preparation method of above-mentioned brass band, especially composition, plasticity and grain fineness number.
The technical scheme of technical solution problem of the present invention is: a kind of lamp holder contains lead (Pb), iron (Fe), tin (Sn), nickel (Ni), copper (Cu), phosphorus (P), zinc with high stretch ability brass band;
Described lead (Pb) content≤0.01%, iron (Fe) content≤0.02%, tin (Sn) content≤0.02%, nickel (Ni) content≤0.02%, phosphorus (P) content are 0.001-0.003%; Copper (Cu) content 63.0-64.5%, surplus is a zinc.
In order to strengthen the plasticity of brass, also can in brass, add the cerium of 0.001-0.003%, the add-on of cerium is very few or too much, does not all have the plastifying effect.
Preparing method of the present invention comprises following operation:
1) founding operation:
2) heating, hot-rolled process: going out the ingot temperature is 820~850 ℃, and the heating time spent is 4 hours, guarantees before coming out of the stove that the ingot blank temperature is even;
3) mill the face operation: hot rolling gained ingot blank is carried out upper and lower surperficial milling, and two-sided milling thickness is about 0.9mm~1.0mm;
4) cold rolling process: adopt 7 passage rolling technology: 12.5mm-9.5mm-7.5mm-6.0mm-4.9mm-4.0mm-3.35mm-2.5mm;
5) rough annealing operation: the preheating zone design temperature is that 635 ℃, heating zone design temperature are that 645 ℃, heat preservation zone design temperature are 625 ℃, and the annealing cycle is 7 hours; Annealing back ingot blank physicals is by tension>=294N/mm 2, extend>=55% and carry out an acceptance inspection;
6) blank pickling process: the sulphuric acid soln of operating weight concentration 10~12% carries out pickling, and 90~110 ℃ of oven dry.
7) work in-process and finished product rolling process:
8) work in-process and finished product acid-washing:
First and second rolling process acid cleaning process: operating weight concentration is that 6~8% sulphuric acid soln carries out pickling, and 90~110 ℃ of oven dry.
The 3rd rolling process acid cleaning process: this operation is a finished product acid-washing, and operating weight concentration is that 4~6% sulphuric acid soln carries out pickling, and operating weight concentration is that 0.02% passivating solution carries out passivation, and 90~110 ℃ of oven dry.
9) inspection process: finished surface, tolerance, band shape and physicals are detected, if all meet standard for acceptance then be regarded as salable product, otherwise qualitative be defective products;
A) physicals standard for acceptance
Finished product thickness The cupping standard The HV standard
>0.35~0.40 ≥9.80mm 75~90
>0.30~0.35 ≥9.60mm 75~90
>0.25~0.30 ≥9.40mm 80~95
>0.20~0.25 ≥9.20mm 80~95
>0.15~0.20 ≥8.80mm 80~95
10) side cut, packaging process: the base branch is cut into the required width of client in the future, and finished product is packed warehouse-in;
In the above-mentioned founding operation, equipment used is frequency cored induction furnace and vertical D.C.casting;
In the described heating process, equipment used is a walking beam furnace, and stove is divided into three sections of preheatings, heating, insulation, and it is 800~830 ℃ that H62 goes out the ingot temperature, and H65 goes out the ingot temperature and is about 800~850 ℃.
In the described hot-rolled process, equipment used is a two-roller reversible formula hot rolls, adopts the dilute emulsion cooling and lubricating, and coming base thickness is 165mm, and supplying base thickness is 13.5mm, and ingot blank adopts 11 passages rolling;
Described milling in the face operation, equipment used are that off-line mills the face machine, respectively the made-up belt upper and lower surfaces are carried out milling, and two-sided milling thickness 0.9~1.0mm mills ingot blank surface, back and should not have obvious wiping scuffing, is mingled with (sand), core, and lead angle is slick and sly, and knife mark is carefully shallow;
In the said cold rolling process, equipment used is a 4-roller reversible cold rolling mill, according to rolling accuracy can with rolling be divided into roughing, in roll, the finish rolling three major types, wherein be provided with the cutting edge operation after the roughing;
Described annealing operation, blank adopts the push-down lehre, and work in-process and finished product adopt the bell-jar lehre, and it is mainly used in the work hardening of eliminating brass alloys, makes it to recover again plasticity; According to hardenability, alloying constituent, performance requriements adjustment holding temperature and soaking time; The annealing design temperature is 390~650 ℃, and the annealing cycle is 7.0~20 hours;
Described pickling process, it is mainly used in the residual lubricant medium of removing (washing) copper strip surface, annealing dirt, surface oxide layer etc., mainly be provided with unreel, devices such as pickling, washing, water brush, oven dry, upright volume, wherein finished product acid-washing is provided with the passivation device.
Said inspection process, it is mainly used in check finished product qualification, mainly comprises tolerance of dimension, surface quality, band shape quality, physicals four broad aspect, and above four equal eligibles of check are regarded as salable product, can implement the finished product cutting edge to it, cut open bar;
Visible from the Cu-Zn binary system phase diagram, market brass is solid-state to have α (alpha+beta) phase respectively down, changes to β ' ordered solid solution at 454~468 ℃ of β disordered solid solutions.Zinc content was less than 36% o'clock, and its tissue is a αGu Rongti, and alpha brass plasticity is good, can hot and coldly process, and its room temperature elongation increases with the increase of zinc content, reached maximum value during to 30%~32% zinc.Zinc content was at 36%~46.5% o'clock; Its tissue is (alpha+beta) alpha-beta brass, and (alpha+beta) brass at room temperature contains hard and crisp ordered phase β ', so intensity is high, plasticity is low; And be easy to work hardening than alpha brass; Along with the increase of β ' phase, the plasticity of alpha-beta brass acutely reduces, and wants strict control working modulus during cold working.But the β of (alpha+beta) brass at high temperature more is prone to softening than α mutually mutually; So often being heated in the TR in β district, (alpha+beta) brass carries out hot-work; But it is too far away that Heating temperature should not surpass (alpha+beta)/β ' line of delimitation; Its best heating condition is to make still to keep a spot of α in the alloy structure and limit β phase grain growth mutually, avoids cracking.
Seldom solid solution is in copper-zinc alloy for phosphorus (P), and fragility phase Cu will appear in the phosphorus that in alpha brass, surpasses certain content 3P reduce brass plasticity, but carbamate additives for low phosphorus can make the grain refining of brass ingot casting, improves the grain fineness number of brass.
The present invention compared with prior art; The major technique advantage is embodied in: the lamp holder of being produced is with high stretch ability brass band; Through reasonable control impurity content, finished product grain fineness number and deep drawability; Can satisfy in the lamp holder moulding process the requirement of good plasticity, can avoid the degree of depth back goods pitted skin that stretches to influence outward appearance and yield rate again;
Embodiment
Below in conjunction with embodiment the present invention is done detailed explanation.
Cathode copper that this instance uses meets GB GB/T 467-1997, and the zinc ingot metal that uses meets GB GB/T470-2008, and the weight percent composition of the category-B material that uses is: Cu>=99.80%, Pb≤0.025%, Fe≤0.025%, P≤0.01%;
Embodiment 1: brass band H650.25 * 200M production technique
1, founding operation: this instance is pressed cathode copper 1:B class material 2, and surplus is that zinc ingot metal is thrown stove, and gained ingot blank composition weight percent is:
Copper: 64.2, lead: 0.0085, iron: 0.0050, tin: 0.0050, nickel: 0.0018, phosphorus: 0.0022, other impurity elements: 0.06, surplus is a zinc.
The gained ingot blank is of a size of: thickness 165mm, width 210mm, length 4000mm;
2, heating, hot-rolled process: the heat tracing zone design temperature is 920 ℃, and actual to go out the ingot temperature be 820~850 ℃, and the heating time spent is 4 hours, guarantees before coming out of the stove that the ingot blank temperature is even; After coming out of the stove, uses ingot blank 11 passage hot rollings;
Gained made-up belt thickness 13.5mm, width 230mm;
3, mill the face operation: hot rolling gained ingot blank is carried out upper and lower surperficial milling, and two-sided milling thickness is about 0.9mm~1.0mm;
Gained made-up belt thickness 12.5mm, width 230mm;
4, cold rolling, cutting edge operation: adopt 7 passage rolling technology: 12.5mm-9.5mm-7.5mm-6.0mm-4.9mm-4.0mm-3.35mm-2.5mm; Preceding two passages of roughing are polished, are eliminated to ensure confession base quality the ingot blank surface imperfection, roll the back roughing blank is carried out cutting edge;
Gained made-up belt thickness 2.5mm, width 210mm;
5, annealing operation: the preheating zone design temperature is that 635 ℃, heating zone design temperature are that 645 ℃, heat preservation zone design temperature are 625 ℃, and the annealing cycle is about 7 hours; Annealing back ingot blank physicals is by tension>=294N/mm 2, extend>=55% and carry out an acceptance inspection;
6, blank pickling process: the sulphuric acid soln of operating weight concentration 10~12% carries out pickling, and 90~110 ℃ of oven dry.
7, rolling, the annealing process of work in-process and finished product is seen table-4;
Table-4 work in-process and finished product production technique
Figure BDA0000093265820000061
8, work in-process and finished product acid-washing technology:
First and second rolling process acid cleaning process: operating weight concentration is that 6~8% sulphuric acid soln carries out pickling, and 90~110 ℃ of oven dry.
The 3rd rolling process acid cleaning process: this operation is a finished product acid-washing; Operating weight concentration is that 4~6% sulphuric acid soln carries out pickling; And operating weight concentration is that 0.02% passivating solution (hc-10, Hangzhou Baimu Surface Technology Co., Ltd.) carries out passivation, and 90~110 ℃ of oven dry.
9, inspection process: finished surface, tolerance, band shape and physicals are detected, if all meet standard for acceptance then be regarded as salable product, otherwise qualitative be defective products;
End properties value: cupping: 9.42mm, HV value 88.6, the about 0.020mm of grain-size;
10, side cut, packaging process: in the future base width 210mm divides and is cut into the required width 200mm of client, and promptly finished product is: H650.25 * 200mm, and finished product packed warehouse-in;
Embodiment 2 (embodiment 1 Comparative Examples): brass band H650.25 * 200M production technique
1, founding operation: this instance is pressed cathode copper 1:B class material 4, and surplus is that zinc ingot metal is thrown stove, and gained ingot blank composition weight percent is:
Copper: 64.3, lead: 0.0090, iron: 0.018, tin: 0.025, nickel: 0.020, phosphorus: 0.004, other impurity elements: 0.072, surplus is a zinc.
The gained ingot blank is of a size of: thickness 165mm, width 210mm, length 4000mm;
2, heating, hot-rolled process, mill face operation, cutting edge operation, rough annealing operation, blank pickling process, work in-process and finished product acid-washing technology, inspection process, side cut, packaging process such as embodiment 1;
3, rolling, the annealing process of work in-process and finished product is seen table-5;
Table-5 work in-process and finished product production technique
End properties value: cupping: 9.45mm, HV value 87.2, the about 0.03mm of grain-size;
Because brass impurity component phosphorus exceeds standard of the present invention among the embodiment 2; Though in work in-process and finished product annealing process, make end properties satisfy requirement of the present invention through rationally adjusting annealing temperature; But its grain fineness number is bigger, is prone to the pitted skin phenomenon in the lamp holder drawing process, can not satisfy customer requirement;
Embodiment 3: brass band H650.25 * 200M production technique
1, founding operation: this instance is pressed cathode copper 1:B class material 4, and surplus is that zinc ingot metal is thrown stove, and gained ingot blank composition weight percent is:
Copper: 64.2, lead: 0.0075, iron: 0.012, tin: 0.018, nickel: 0.015, phosphorus: 0.0023, cerium: 0.002:0.0055, other impurity elements: 0.062, surplus is a zinc.
The gained ingot blank is of a size of: thickness 165mm, width 210mm, length 4000mm;
2, heating, hot-rolled process, mill face operation, cutting edge operation, rough annealing operation, blank pickling process, work in-process and finished product acid-washing technology, inspection process, side cut, packaging process such as embodiment 1;
3, rolling, the annealing process of work in-process and finished product is seen table-6;
Table-6 work in-process and finished product production technique
Figure BDA0000093265820000081
End properties value: cupping: 10.05mm, HV value 86.8, the about 0.025mm of grain-size;
Since the adding among the embodiment 3 in the brass rare-earth element cerium, its Erichsen number is significantly improved.
Embodiment 4: brass band H620.35 * 3004M production technique
1, founding operation: this instance is pressed category-B material 2: our factory H65 feed back 1, surplus are that zinc ingot metal is thrown stove, and gained ingot blank staple weight percent is:
Copper: 63.2, lead: 0.0090, iron: 0.0190, tin: 0.015, nickel: 0.0036, phosphorus: 0.0026, other impurity elements: 0.062, surplus is a zinc.
The gained ingot blank is of a size of: thickness 165mm, width 310mm, length 4000mm;
2, heating, hot rolling, to mill face, cold rolling, cutting edge, annealing, blank pickling process identical with embodiment 1;
3, work in-process and finished product production technique are seen table-7;
Table-7 work in-process and finished product production technique
Figure BDA0000093265820000091
4, work in-process and finished product acid-washing technology:
First and second rolling process acid cleaning process: operating weight concentration is that 6~8% sulphuric acid soln carries out pickling, and 90~110 ℃ of oven dry.
The 3rd rolling process acid cleaning process: this operation is a finished product acid-washing, and operating weight concentration is that 4~6% sulphuric acid soln carries out pickling, and operating weight concentration is that 0.02% passivating solution carries out passivation, and 90~110 ℃ of oven dry.
5, check, side cut, packaging process are identical with embodiment 1;
End properties value: cupping: 9.72mm, HV:89.5, the about 0.025mm of grain-size.

Claims (8)

1. lamp holder is with high stretch ability brass band, and it is characterized in that: described brass contains lead, iron, tin, nickel, copper, phosphorus, zinc;
Described lead content≤0.01%, iron level≤0.02%, tin content≤0.02%, nickel content≤0.02%, phosphorus content are 0.001-0.003%; Copper content 63.0-64.5%, surplus is a zinc.
2. lamp holder according to claim 1 is characterized in that: the cerium that also can in brass, add 0.001-0.003% with high stretch ability brass band.
Claim 1 or 2 described lamp holders with high stretch can brass band the preparation method, comprise following operation: founding operation, heating, hot-rolled process, mill face operation, cold rolling process, rough annealing operation, blank pickling process, work in-process and finished product rolling process, work in-process and finished product acid-washing, inspection process, side cut, packaging process.
4. lamp holder according to claim 3 is characterized in that with the preparation method of high stretch ability brass band:
Described heating, hot-rolled process: going out the ingot temperature is 820~850 ℃, and the heating time spent is 4 hours, guarantees before coming out of the stove that the ingot blank temperature is even.
5. lamp holder according to claim 3 is characterized in that with the preparation method of high stretch ability brass band:
Described cold rolling process: adopt 7 passage rolling technology: 12.5mm-9.5mm-7.5mm-6.0mm-4.9mm-4.0mm-3.35mm-2.5mm.
6. lamp holder according to claim 3 is characterized in that with the preparation method of high stretch ability brass band:
Described rough annealing operation: the preheating zone design temperature is that 635 ℃, heating zone design temperature are that 645 ℃, heat preservation zone design temperature are 625 ℃, and the annealing cycle is 7 hours; Annealing back ingot blank physicals is by tension>=294N/mm 2, extend>=55% and carry out an acceptance inspection.
7. lamp holder according to claim 3 is characterized in that with the preparation method of high stretch ability brass band:
Described blank pickling process: the sulphuric acid soln of operating weight concentration 10~12% carries out pickling, and 90~110 ℃ of oven dry.
8. lamp holder according to claim 3 is characterized in that with the preparation method of high stretch ability brass band:
Described work in-process and finished product acid-washing operation:
First and second rolling process acid cleaning process: operating weight concentration is that 6~8% sulphuric acid soln carries out pickling, and 90~110 ℃ of oven dry;
The 3rd rolling process acid cleaning process: this operation is a finished product acid-washing, and operating weight concentration is that 4~6% sulphuric acid soln carries out pickling, and operating weight concentration is that 0.02% passivating solution carries out passivation, and 90~110 ℃ of oven dry.
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Cited By (3)

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Publication number Priority date Publication date Assignee Title
CN103266239A (en) * 2013-05-28 2013-08-28 宁波盛发铜业有限公司 Tin-bismuth brass and production process thereof as well as device for producing tin-bismuth brass
CN103484718A (en) * 2013-10-10 2014-01-01 铜陵金威铜业有限公司 Lock making copper strip and preparation method thereof
CN104087881A (en) * 2014-07-16 2014-10-08 安徽鑫科新材料股份有限公司 Manufacturing technology for brass zipper wire

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Publication number Priority date Publication date Assignee Title
CN103266239A (en) * 2013-05-28 2013-08-28 宁波盛发铜业有限公司 Tin-bismuth brass and production process thereof as well as device for producing tin-bismuth brass
CN103484718A (en) * 2013-10-10 2014-01-01 铜陵金威铜业有限公司 Lock making copper strip and preparation method thereof
CN103484718B (en) * 2013-10-10 2016-06-29 铜陵金威铜业有限公司 Lockmaking copper strips and its preparation method
CN104087881A (en) * 2014-07-16 2014-10-08 安徽鑫科新材料股份有限公司 Manufacturing technology for brass zipper wire
CN104087881B (en) * 2014-07-16 2016-01-13 安徽鑫科新材料股份有限公司 A kind of manufacturing process of brass teeth zipper line

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Address after: 241008 Anhui province Wuhu City Jiuhua economic and Technological Development Zone No. 8 North Road

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Denomination of invention: High-tensile property brass band for lamp holder and production process thereof

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