CN101250640A - Low-lead copper alloy for amiable cutting smithing - Google Patents
Low-lead copper alloy for amiable cutting smithing Download PDFInfo
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- CN101250640A CN101250640A CNA2008100841834A CN200810084183A CN101250640A CN 101250640 A CN101250640 A CN 101250640A CN A2008100841834 A CNA2008100841834 A CN A2008100841834A CN 200810084183 A CN200810084183 A CN 200810084183A CN 101250640 A CN101250640 A CN 101250640A
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Abstract
The invention relates to a lead-free copper alloy which is easy to cut and forge, which relates to a low-lead brass alloy pipe and steel bar which are used in various hot-water heating, sanitary spare parts and equipment which is forged or is directly processed and produced in industries such as hot-water heating and sanitary. The invention is characterized in that the percentage by weight composition of alloy comprises Cu 57.5%-59.0%, Fe 0.05%-0.2%, Si 0.3%-0.4%, Bi 0.7%-1.2% and the allowance is zinc and unavoidable impurity. The alloy component of lead-free copper alloy which is easy to cut and forge of the invention is on the basis of copper and adds main elements such as proper zinc, antimony, bismuth, aluminium, iron and the like, which strictly control impurity component, easy-cutting brass alloy material for casting which is produced is particularly suitable for various hot-water heating, sanitary components and equipment, and the products have the advantages of aesthetic appearance, compact structure, clean shape and bright color, copper alloy pipe and steel bar which are produced by the lead-free recasting copper alloy are particularly applicable for processing vehicles, milling, grinding polishing, welding, electroplating and the like besides the above advantages, and has the advantages of corrosion prevention, long service span and the like.
Description
Technical field
A kind of low-lead copper alloy for amiable cutting smithing relates to that industries such as being used for hot-water heating, bathroom is used to forge or direct low-lead brass alloy pipe, the bar used of dim, the bathroom component of the various water produced of machining and equipment.
Background technology
Because its castability of copper alloy, machine add the grinding and polishing performance, electroplate performance, fine corrosion resistance, be widely used in for a long time that various water are dim, bathroom component and equipment make the field, its long service life, performance is good.
For many years, the copper alloy of be used for that various water are dim, bathroom component and equipment being made the field is generally the lead brass alloy material that contains 1%～3.5% lead.Owing to contain a certain amount of lead in the lead brass alloy, have good machinability.So all be to adopt the Winn bronze material to forge or directly be machined to that portion water is dim, bathroom is with other parts and utensil, this leaded brass master composition all the time
| HPb59-1 | Copper 57-60 | Plumbous 0.8-1.9 | Iron≤0.5 | Nickel≤0.5 | The zinc surplus | Use for forging |
| HPb62-3 | Copper 60.0-63.0 | Plumbous 2.5-3.7 | Iron≤0.35 | Nickel≤0.5 | The zinc surplus | Use for fast turning |
Add lead and make brass have good cutting performance part all will cut because most of forge piece or machine add, car, mill, machinings such as brill, weldering, grinding and polishing, plumbiferous brass has very good cutting performance.
In recent years, people recognize gradually, the alloy that contains lead element in use, can produce adverse influence to HUMAN HEALTH and environment, European Union, the U.S. etc. launch respectively the environmental protection law, require 2010 to ban use of plumbiferous brass material to be used to produce the dim bathroom product of water that human health is had disadvantageous effect later on.Developing novel low lead or not having the leaded brass material is present copper material metallurgical industry field important technology problem.
For adapting to countries and regions such as European Union, the U.S. because of to requirement on environmental protection, ban use of leaded brass to produce the regulation of the dim and bathroom utensil of water, domestic and international all have a research report of having carried out being used to replacing the alloy of present widely used leaded brass.
At present, existing research is to add a spot of bismuth or antimony is used for substituting plumbous effect in copper zinc alloy, the investigator is placed on sight and adds and go into bismuth or add antimony, therefore all produces some alternative leaded brasss accordingly and bismuth brass that have same cutting effect and merimee's yellow copper both at home and abroad.There are external product such as the U.S., Japan, Korea S and the domestic bright group in sea, Zhejiang, Guangdong state east company etc. that the own substitute products of developing are all arranged.Listed some analogous products in the following table for example: as
Lead-Free Brass Chemical Compositions
Suppliers Products Cu Pb Bi Si Fe Al Sn Ni Mn Sb Zn
The casting of the bright group in sea with unleaded BRASS FORGE composition is: copper 60.0-62.0, lead≤0.05, bismuth 0.5-1.0, iron≤0.15, aluminium 0.5-0.7, tin≤0.15, nickel≤0.10, antimony≤0.02, zinc Rem;
The forging of the bright group in sea with unleaded round brass rod composition is: copper 58.0-61.0, lead≤0.1, bismuth 2.5-3.5, iron≤0.15, zinc Rem;
The composition of the machining Pb-free copper-alloy of the bright group in sea is: copper 58.0-61.0, lead≤0.1, bismuth 0.6-1.0, iron≤0.15, zinc Rem;
The composition of the big prosperous L/F Pb-free copper-alloy of Korea S is: copper 61-62, lead≤0.05, bismuth 0.6-1.0, iron≤0.15 aluminium 0.5-0.7, tin≤0.15, nickel≤0.10, antimony≤0.02, zinc Rem;
Starline 1294 LOW Lead: copper 61.25-61.75, lead≤0.05, bismuth 0.85-0.95, silicon≤0.01, iron 0.10-0.30, aluminium 0.35-0.45, tin 0.20-0.40, nickel 0.15-0.25, manganese≤0.01, antimony 0.04-0.06, zinc Rem;
Big drop state east HBi59-1: copper 57.5-60, lead≤0.01 bismuth 1.0-2.5, iron≤0.05, zinc Rem;
ASTM C89540: copper 58.0-64.0, lead≤0.10, bismuth 0.6-1.2, iron≤0.50, aluminium 0.10-0.60, tin≤1.2, nickel≤1.0, zinc 32.0-38.0 (Se :≤0.10);
The PWEHSCBRASS of Bo Wei group: copper 55-65, lead≤0.01, bismuth 0.3-1.5, antimony 0.05-2.2, zinc Rem;
The PWEHSBRASS of Bo Wei group: copper 55-65, lead≤0.01, bismuth 0.3-2.0 (Mn or Ni or Si:0.3-1.0) antimony 0.05-1.5, zinc Rem.
At above-mentioned existing alloy, main only emphasis solves has the cutting ability of alternative leaded brass, makes other performance undesirable.Owing to contain the bismuth that composition is higher and price is very expensive, the production cost height in the alloy.And when producing alloy cast ingot; crystal grain is not careful; undesirable with performance; produce the parts in addition that copper rod or copper pipe are used to forge or directly be machined to the dim or sanitaryware of water with such ingot casting again; because this product major part all requires polishing to electroplate; therefore require product before plating, must carry out grinding and polishing, but the grinding and polishing poor performance of above-mentioned alloy, the grinding and polishing surface usually have be mingled with, crackle, hard point generation.
Summary of the invention
Purpose of the present invention is exactly the deficiency that exists at above-mentioned prior art, provides a kind of and can effectively reduce lead content in the alloy, the more valuable bismuth metal of an amount of adding, and added a spot of silicon, iron etc.Its castability, forgeability, machine add the grinding and polishing performance, electroplate performance, corrosion resistance nature all show good, long service life, the low-lead copper alloy for amiable cutting smithing material that performance is good and production cost is lower.
The objective of the invention is to be achieved through the following technical solutions.
A kind of low-lead copper alloy for amiable cutting smithing is characterized in that the weight percent of its alloy consists of: Cu:57.5%-59.0%; Pb:0.3%-0.6%; Fe:0.05%-0.2%; Si:0.3%-0.4%; Bi:0.7%～1.2%; Surplus is zinc and unavoidable impurities, wherein Sn :≤0.2%; Ni :≤0.2%.
The present invention is a kind of low-lead copper alloy for amiable cutting smithing, its preparation process is after carrying out weighing by the Chemical Composition requirement, with general red copper (iron-holder is lower than 0.3%), the warm melting that raises makes it fusing, because of furnace burdening is the brass of copper content about 60%, the adding red copper also makes after the fusing, copper content rises to more than 70% in the interior copper liquid composition of stove, belong to higher-grade brass, the flame temperature of its copper liquid is higher, if copper liquid suitably keeps the regular hour to make it to be in high temperature or flame state, refractory metal or metallic compound in the brass liquation can be melted or dissolve, its process can be eliminated the hard point in the brass material, electroplates after forging or the machining grinding and polishing after making and can not make product rejection because of hard point is arranged.After above melting technology, add the brass rim charge again, last zincification, leading or other elements such as adding bismuth, silicon make the Chemical Composition of alloy qualified.In the melting production process, should also be noted that to prevent the ironware article as stirring rod, drag for the too much molten copper water of contact such as slag spoon, more do not allow refractory metals such as ironware, iron block and fall in the copper liquid.The control of iron composition is a gordian technique in this alloy, in the alloy a spot of iron must be arranged, but its effect crystal grain thinning, but iron too much existence in copper liquid is the major reason that causes hard point.Also will add the brass refining agent with reference to the production method of general market brass material during production, deslagging agent etc. carry out degasification, slagging-off to copper liquid, prevent that ingot casting or foundry goods from producing pore and being mingled with.
Low-lead copper alloy for amiable cutting smithing of the present invention, the copper material of its production be with copper be base add zinc, lead, bismuth, silicon, iron, etc. principal element, and this kind copper material of strict control impurity composition production, be particularly suitable for being used in the industries such as water is dim, bathroom forging or machining after produce that various water are dim, bathroom parts and equipment in addition, its product shape is attractive in appearance, compact structure, the clear wash rice of shape, bright in color, except that above-mentioned advantage, also be suitable for especially forging or machining such as car, mill, grinding and polishing, welding, plating etc., and have advantages such as corrosion-resistant, long service life.
Embodiment
A kind of low-lead copper alloy for amiable cutting smithing, the weight percent of its alloy consists of: Cu:57.5%-59.0%, Pb:0.3%-0.6%, Fe:0.05%-0.2%, Si:0.3%-0.4%, Bi:0.5%-0.9%, surplus are zinc and unavoidable impurities, and Sn≤0.2, Ni≤0.2.
Embodiment 1
A kind of low-lead copper alloy for amiable cutting smithing, the weight percent of its alloy consists of: Cu:57.50; Pb:0.48; Si:0.35; Bi:0.78; Fe:0.21; Ni:0.20; Sn:0.12; Zn: surplus; Product specification: bar: φ 32 ± 0.1 (mm); State: semihard;
Interventions Requested: 1. surface quality: flawless, damage, jump defectives such as Che Hen, qualified,
2. specification and tolerance: φ 31.98: qualified,
3. hardness: Brinell hardness: HB 101: qualified,
4. Chemical Composition: qualified;
The good fluidity of casting cycle copper liquid, not finding has the hard point to wait other defective; Do not find during machining that water outlet has the phenomenon of mashed tooth; Do not find during grinding and polishing that material has the phenomenon of crackle; Do not find after the plating that material has the phenomenon of crackle yet.
Embodiment 2
A kind of low-lead copper alloy for amiable cutting smithing, the weight percent of its alloy consists of Cu:58.53; Pb:0.30; Si:0.30; Bi:0.90; Fe:0.08; Ni:0.21; Sn:0.15; Zn: surplus; Product specification: bar: φ 41 ± 0.15 (mm); State: semihard;
Interventions Requested: 1. surface quality: flawless, damage, jump defectives such as Che Hen, qualified,
2. specification and tolerance: φ 41.11: qualified,
3. hardness: Brinell hardness: HB 97: qualified,
4. Chemical Composition: qualified.
The good fluidity of casting cycle copper liquid, not finding has the hard point to wait other defective; Do not find during machining that water outlet has the phenomenon of mashed tooth; Do not find during grinding and polishing that material has the phenomenon of crackle; Do not find after the plating that material has the phenomenon of crackle yet.
Embodiment 3
A kind of low-lead copper alloy for amiable cutting smithing, the weight percent of its alloy consists of Cu:58.03; Pb:0.61; Si:0.42; Bi:0.51; Fe:0.05; Ni:0.14; Sn:0.20; Zn: surplus; Product specification: bar: φ 45 ± 0.15 (mm); State: semihard:
Interventions Requested: 1. surface quality: flawless, damage, jump defectives such as Che Hen, qualified,
2. specification and tolerance: φ 44.98: qualified,
3. hardness: Brinell hardness: HB 96: qualified,
4. Chemical Composition: qualified,
The good fluidity of casting cycle copper liquid, not finding has the hard point to wait other defective; Do not find during machining that water outlet has the phenomenon of mashed tooth; Do not find during grinding and polishing that material has the phenomenon of crackle; Do not find after the plating that material has the phenomenon of crackle yet.
Embodiment 4
A kind of low-lead copper alloy for amiable cutting smithing, the weight percent of its alloy consists of Cu:59.01; Pb:0.32; Si:0.31; Bi:0.76; Fe:0.06; Ni:0.02; Sn:0.13; Zn: surplus; Product specification: bar: φ 43 ± 0.1 (mm); State: semihard:
Interventions Requested: 1. surface quality: flawless, damage, jump defectives such as Che Hen, qualified,
2. specification and tolerance: φ 42.98: qualified,
3. hardness: Brinell hardness: HB 110: qualified,
4. Chemical Composition: qualified.
The good fluidity of casting cycle copper liquid, not finding has the hard point to wait other defective; Do not find during machining that water outlet has the phenomenon of mashed tooth; Do not find during grinding and polishing that material has the phenomenon of crackle; Do not find after the plating that material has the phenomenon of crackle yet.
Claims (1)
1. a low-lead copper alloy for amiable cutting smithing is characterized in that the weight percent of its alloy consists of: Cu:57.5%-59.0%; Pb:0.3%-0.6%; Fe:0.05%-0.2%; Si:0.3%-0.4%; Bi:0.7%～1.2%; Surplus is zinc and unavoidable impurities, wherein Sn :≤0.2%; Ni :≤0.2%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100841834A CN101250640A (en) | 2008-03-28 | 2008-03-28 | Low-lead copper alloy for amiable cutting smithing |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100841834A CN101250640A (en) | 2008-03-28 | 2008-03-28 | Low-lead copper alloy for amiable cutting smithing |
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| Publication Number | Publication Date |
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| CN101250640A true CN101250640A (en) | 2008-08-27 |
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| CNA2008100841834A Pending CN101250640A (en) | 2008-03-28 | 2008-03-28 | Low-lead copper alloy for amiable cutting smithing |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104195365A (en) * | 2014-05-07 | 2014-12-10 | 泉州市长江卫浴有限公司 | Low-lead brass alloy and preparing method thereof |
-
2008
- 2008-03-28 CN CNA2008100841834A patent/CN101250640A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104195365A (en) * | 2014-05-07 | 2014-12-10 | 泉州市长江卫浴有限公司 | Low-lead brass alloy and preparing method thereof |
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Open date: 20080827 |