CN101250642A - Leadless double teeming copper alloy - Google Patents
Leadless double teeming copper alloy Download PDFInfo
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- CN101250642A CN101250642A CNA2008100841853A CN200810084185A CN101250642A CN 101250642 A CN101250642 A CN 101250642A CN A2008100841853 A CNA2008100841853 A CN A2008100841853A CN 200810084185 A CN200810084185 A CN 200810084185A CN 101250642 A CN101250642 A CN 101250642A
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Abstract
The invention relates to a lead-free recasting copper alloy, which relates to a recasting copper alloy for various hot-water heating, sanitary spare parts and equipment which are produced in remelting and casting in hot-water heating industry and sanitary industry. The invention is characterized in that the percentage by weight composition of alloy comprises Cu 60%-62%, Pb 0.1%-0.25%, Al 0.5%-0.7%, Sb 0.2%-0.4%, Bi 0.6%-1.0%, Fe 0.05%-0.2% and the allowance is zinc and unavoidable impurity. Lead-free recasting copper billet which is produced by lead-free recasting copper alloy 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, a series of recasting copper billets which are produced are particularly suitable for various hot-water heating and sanitary components and equipment which are produced by a recasting and remelting method in hot-water heating industry and sanitary industry, and the products have the advantages of aesthetic appearance, compact structure, clean shape and bright color, casting article which is produced by the lead-free recasting copper alloy is 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 leadless double teeming copper alloy, the double teeming copper alloy of relating to and a kind ofly be used for that hot-water heating, bathroom industry are dim with the various water of remelting and casting production, bathroom component and equipment being used.
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 use properties is good, and the life-span is long.
For many years, being used for dim bathroom component of various water and equipment makes the copper alloy in field and 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.Have in the dim bathroom product of water much is to adopt leaded brass to carry out remelting to be cast as various parts in addition more all the time, is used for the copper alloy ingot that remelting casts again in the production and is referred to as the double teeming copper ingot, and the main composition of these brass alloys is (weight percent):
| Copper 59-60 | Plumbous 1.2-1.8 | Iron≤0.2 | Tin≤0.2 | Aluminium 0.5-0.7 | The zinc surplus |
Usually add lead and make brass have good cutting performance,, wherein have many foundry goods surface treatment such as after machining, also need electroplate because most of foundry goods all will carry out machinings such as partial cut, turnning and milling, brill weldering, grinding and polishing.Plumbiferous brass has very good cutting performance, and the effect that adds aluminium is to improve casting strength, hardness, makes alloy have advantages of good casting and mechanical property, and improves the corrosion resistance nature of alloy.Control impurity iron and tin mainly are in order to make alloy prevent to produce the hard point in castingprocesses, and this hard point causes plating to be scrapped the most at last.
In recent years, people recognize gradually, the copper 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.Thereby to develop novel low lead or do not have the leaded brass material be present copper material metallurgical industry field important technology problem.
Because environmental requirement, ban use of leaded brass to produce the regulation of the dim and bathroom utensil of water for adapting to countries and regions such as European Union, the U.S., the research report of having carried out being used to replacing the alloy of present widely used leaded brass is all arranged both at home and abroad.
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 the composition of unleaded BRASS FORGE 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 composition that the bright group in sea forges with unleaded round brass rod is: copper 58.0-61.0, lead≤0.1, bismuth 2.5-3.5, iron≤0.15, zinc Rem.
The bright machining Pb-free copper-alloy composition copper 58.0-61.0 of group in sea, lead≤0.1, bismuth 0.6-1.0, iron≤0.15, zinc Rem;
The big prosperous L/F lead-free alloy composition 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 :≤.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, general main 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 production double teeming product, crystal grain is careful inadequately and performance is undesirable, and shape is not attractive in appearance.Because water is dim to be defended the product major part and all requires polishing to electroplate, and therefore requires product must carry out grinding and polishing before plating, but the grinding and polishing poor performance of above-mentioned alloy, grinding and polishing surface regular meeting 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, and a kind of no lead content is provided, and has reduced the content than the precious metal bismuth, and has added a spot of antimony.Make castability, the machine of alloy add the grinding and polishing performance, electroplate performance, fine corrosion resistance, long service life, the leadless double teeming copper alloy 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 leadless double teeming copper alloy, the weight percent that it is characterized in that its alloy consists of: Cu:60%-62%, Al:0.5%-0.7%, Sb:0.2%-0.4%, Bi:0.6%-1.0%, Fe:0.05%-0.2%, surplus is zinc Zn and unavoidable impurities, and Sn: Ni≤0.15% :≤0.1%, Pb :≤0.05%.
The present invention is a kind of leadless double teeming copper alloy, its preparation process key 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 energy degasification, slagging-off also can be eliminated the hard point in the brass material, for not making product rejection because of hard point is arranged after double teeming later on or the machining grinding and polishing plating.After above melting technology, add the brass rim charge again, other elements such as last zincification, aluminium, antimony and adding bismuth make the Chemical Composition of alloy qualified.In the melting production process, notice preventing that the ironware article are as stirring rod, drag for the too much molten copper water of contact such as slag spoon, more not allowing refractory metals such as ironware, iron block falls 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.Also should add an amount of grain-refining agent when being necessary, in crystallisation process, obtain the crystal structure of grain refining in order to guarantee foundry goods.
This (unleaded) of the present invention double teeming copper alloy, the leadless double teeming copper ingot of its production, be to be that base adds an amount of zinc with copper, bismuth, antimony, iron, Deng principal element, and strict control impurity composition, the serial double teeming copper ingot of producing, it is dim to be particularly suitable for water, the various water of producing with the remelting and casting method in the bathroom industry are dim, bathroom is parts and equipment in addition, its product shape is attractive in appearance, compact structure, the clear wash rice of shape, bright in color, the foundry goods of producing with its is except that above-mentioned advantage, also be suitable for machining such as car especially, mill, grinding and polishing, welding, electroplate etc., and have advantages such as corrosion-resistant, long service life.
Embodiment
A kind of leadless double teeming copper alloy, the weight percent of its alloy consists of: Cu:60%-62%, Pb :≤0.05%, Al:0.5%-0.7%, Sb:0.2%-0.4%, Bi:0.6%～1.0%, Fe:0.05%～0.2%, Sn: Ni≤0.15% :≤0.1%, and surplus is zinc and unavoidable impurities.
Embodiment 1
A kind of leadless double teeming copper alloy, the weight percent of its alloy consists of: Cu:59.95%; Pb:0.03%; Al:0.50%; Bi:0.89%; Sb:0.22%; Fe:0.07%; Ni:0.03%; Sn:0.08%; Zn: surplus; Product specification: the wide * height of the long * of copper ingot 350*120*80 (mm)); State: as cast condition,
Interventions Requested: 1. wineglass test: qualified; 2. surface quality: qualified;
3. polishing check: qualified; 4. Chemical Composition: qualified;
The check explanation:
The test of 1. wineglasses is described: i.e. copper water melting in smelting furnace finishes, stokehold assay chemistry used composition is qualified, before preparing casting, in sampling mold, pour a little copper water into, and make copper water Kuo in sampling mold moving fast, allow copper water in original mold, condense into the sample of goblet shape, check the cup-shaped inwall, with the naked eye and use finger touch, require the sample inwall not have coarse particle and exist, be smooth to the touch and promptly represent the wineglass stand the test;
2. surface quality inspections are described: surperficial flawless is mingled with defectives such as pore. and it is qualified to be;
3. polishing checks are described: ingot casting is prolonged cross section cut, carry out sanding and polishing, check that grinding and polishing face flawless, pore, hard point then are qualified.(following check explanation is identical)
Embodiment 2
A kind of leadless double teeming copper alloy, the weight percent of its alloy consists of: Cu:61.53%; Pb:0.05%; Al:0.71%; Bi:1.05%; Sb:0.32%; Fe:0.20%:Ni:0.10%; Sn:0.12%; Zn: surplus; Product specification: the wide * height of the long * of copper ingot 350*120*80 (mm)); State: as cast condition;
Interventions Requested: 1. wineglass test: qualified; 2. surface quality: qualified;
3. polishing check: qualified; 4. Chemical Composition: qualified.
Embodiment 3
A kind of leadless double teeming copper alloy, the weight percent of its alloy consists of: Cu:62.03%; Pb:0.032%; Al:0.63%; Bi:0.60%; Sb:0.40%; Fe:0.05%; Ni:0.08%; Sn0.15%; Zn: surplus; Product specification: the wide * height of the long * of copper ingot 350*120*80 (mm)); State: as cast condition,
Interventions Requested: 1. wineglass test: qualified; 2. surface quality: qualified;
3. polishing check: qualified; 4. Chemical Composition: qualified.
Embodiment 4
A kind of leadless double teeming copper alloy, the weight percent of its alloy consists of: Cu:61.53%; Pb:0.002%; Al:0.58%; Bi:0.69%; Sb:0.42%; Fe:0.15%; Ni:0.01%; Sn0.12%; Zn: surplus; Product specification: the wide * height of the long * of copper ingot 350*120*80 (mm)); State: as cast condition,
Interventions Requested: 1. wineglass test: qualified; 2. surface quality: qualified;
3. polishing check: qualified; 4. Chemical Composition: qualified.
Claims (1)
1. leadless double teeming copper alloy, the weight percent that it is characterized in that its alloy consists of: Cu:60%-62%, Al:0.5%-0.7%, Sb:0.2%-0.4%, Bi:0.6%-1.0%, Fe:0.05%-0.2%, surplus is zinc Zn and unavoidable impurities, and Sn: Ni≤0.15% :≤0.1%, Pb :≤0.05%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100841853A CN101250642A (en) | 2008-03-28 | 2008-03-28 | Leadless double teeming copper alloy |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100841853A CN101250642A (en) | 2008-03-28 | 2008-03-28 | Leadless double teeming copper alloy |
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| Publication Number | Publication Date |
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| CN101250642A true CN101250642A (en) | 2008-08-27 |
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| CNA2008100841853A Pending CN101250642A (en) | 2008-03-28 | 2008-03-28 | Leadless double teeming copper alloy |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102367529A (en) * | 2011-10-13 | 2012-03-07 | 苏州撼力铜合金材料有限公司 | Environmentally-friendly fast cutting recasting copper alloy |
| CN111455200A (en) * | 2020-04-16 | 2020-07-28 | 宁波金田铜业(集团)股份有限公司 | Preparation method for directly producing copper ingot for environment-friendly bath by using scrap copper |
-
2008
- 2008-03-28 CN CNA2008100841853A patent/CN101250642A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102367529A (en) * | 2011-10-13 | 2012-03-07 | 苏州撼力铜合金材料有限公司 | Environmentally-friendly fast cutting recasting copper alloy |
| CN111455200A (en) * | 2020-04-16 | 2020-07-28 | 宁波金田铜业(集团)股份有限公司 | Preparation method for directly producing copper ingot for environment-friendly bath by using scrap copper |
| CN111455200B (en) * | 2020-04-16 | 2022-02-15 | 宁波金田铜业(集团)股份有限公司 | Preparation method for directly producing copper ingot for environment-friendly bath by using scrap copper |
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Open date: 20080827 |