CN100552070C - A kind of leadless easy-cutting magnesium brass alloy and preparation method thereof - Google Patents
A kind of leadless easy-cutting magnesium brass alloy and preparation method thereof Download PDFInfo
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- CN100552070C CN100552070C CNB2007100359122A CN200710035912A CN100552070C CN 100552070 C CN100552070 C CN 100552070C CN B2007100359122 A CNB2007100359122 A CN B2007100359122A CN 200710035912 A CN200710035912 A CN 200710035912A CN 100552070 C CN100552070 C CN 100552070C
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Abstract
A kind of leadless easy-cutting magnesium brass alloy and preparation method thereof, it is made up of copper, zinc, magnesium alloy element and unavoidable impurities.Alloy composition is: copper: 55～63wt%, magnesium: 0.5～3.0wt%, and aluminium, bismuth or titanium: 0.2～1.5wt%, all the other are zinc Zn, content of impurities is less than 0.1wt%.Its manufacture method is: adopt protective covering method melting magnesium brass; making magnesium rapid solid solution in brass solution is intermetallic compound, and uniform distribution, is cast as the brass ingot casting under 1000～1000-1050 ℃; 500～760 ℃ of extruding, under 200～400 ℃, carry out stress relieving.The present invention adopts magnesium replacement environmental pollution and human body is endangered heavier lead on the basis of existing common lead brass.And possess good cutting performance, hot workability and mechanical property, and can replace existing lead brass alloy, be applied to hot-water heating bathroom and other various production fields.
Description
Technical field
The invention belongs to the manufacturing technology field of metal alloy compositions.Refer more particularly to a kind of environmental protection leadless easy-cutting magnesium brass alloy with excellent cutting ability, mechanical property and corrosion resistance nature.
Background technology
Leaded brass has performances such as good easy cutting, mechanics, physics, is an Albatra metal-of widespread use, developed country only the rate of utilization of brass water pipe just up to more than 90%.Along with mankind's activity and industrial development, plumbous pollution to environment is on the rise, therefore must the strict lead content of controlling various products in industrial production.At present the substitution studies of no leaded brass mainly contains bismuth brass and merimee's yellow copper, but domestic research to bismuth brass does not form independent intellectual property right as yet.Research thinking according to bismuth brass and merimee's yellow copper, select the cheap magnesium of aboundresources for use in conjunction with China's national situation, angle from smear metal formation, performances such as the machinability of magnesium brass and microtexture are studied, obtain to have the another new type leadless easy cutting magnesium brass of market popularization value, will obtain huge social benefit and economic benefit.
Summary of the invention
The purpose of this invention is to provide a series of lead-free have excellent in machinability energy, cold and hot formability, good mechanical propertys, has simultaneously excellent corrosion resistance nature again, the environmental protection leadless easy-cutting magnesium brass alloy that can substitute cupro lead and can not cause environmental pollution and help reducing cost.
Another object of the present invention aims to provide the preparation method of above-mentioned alloy.
The objective of the invention is to realize by following manner:
A kind of leadless easy-cutting magnesium brass alloy, it is become to be grouped into by copper, zinc, magnesium alloy element and unavoidable impurities, the consisting of of described alloy: copper: 55～63wt%, magnesium: 0.5～3.0wt%, all the other are zinc, the total content of impurity is not more than 0.1wt%.
The preparation method of above alloy is: melting magnesium brass under the effect of insulating covering agent, making the rapid solid solution in brass solution of magnesium, aluminium is intermetallic compound, and uniform distribution, and under 1000～1050 ℃, be cast as the brass ingot casting, 500～760 ℃ of extruding, and under 200～400 ℃, carry out stress relieving.
The present invention also provides leadless easy-cutting magnesium brass alloy elementary composition by copper, zinc, magnesium, unavoidable impurities and aluminium or bismuth or titanium alloy, consisting of of described alloy: copper 55～63wt%, magnesium 0.5～3.0wt%, aluminium or bismuth or titanium: 0.2～1.5wt%, all the other are zinc, and the total content of impurity is not more than 0.1wt%.
Described aluminium or bismuth or titanium content are preferably 0.2～1.0wt%.
Melting magnesium brass under the effect of insulating covering agent, making the rapid solid solution in brass solution of magnesium and aluminium or bismuth or titanium is intermetallic compound, and uniform distribution, and is cast as the brass ingot casting under 1000～1050 ℃, 500～760 ℃ of extruding, and under 200～400 ℃, carry out stress relieving.
Thereby the present invention specifically provides the environmental protection leadless easy-cutting magnesium brass alloy of four kinds of forms.
The present invention is one of environmental protection leadless easy-cutting magnesium brass alloy, it is become to be grouped into unavoidable impurities by alloying elements such as copper, zinc, magnesium, consisting of of described alloy: copper Cu:55～63wt%, magnesium Mg:0.5～3.0wt%, all the other are zinc Zn, and impurity component (being other elements) total content is less than 0.1wt%.
The present invention is two of the environmental protection leadless easy-cutting magnesium brass alloy, it is become to be grouped into by copper, zinc, magnesium, aluminium alloy element and unavoidable impurities, contain: copper Cu:55～63wt%, magnesium Mg:0.5～3.0wt%, aluminium Al:0.2～1.5wt%, all the other are zinc Zn, and impurity component (being other elements) total content is less than 0.1wt%.
The present invention is three of the environmental protection leadless easy-cutting magnesium brass alloy, it is become to be grouped into by copper, zinc, magnesium, bismuth alloy element and unavoidable impurities, it contains: copper Cu:55～63wt%, magnesium Mg:0.5～3.0wt%, bismuth Bi:0.2～1.0wt%, all the other are zinc Zn, and impurity component (being other elements) total content is less than 0.1wt%.
The present invention is four of the environmental protection leadless easy-cutting magnesium brass alloy, it is become to be grouped into by copper, zinc, magnesium, titanium alloy element and unavoidable impurities, it contains: copper Cu:55～63wt%, magnesium Mg:0.5～3.0wt%, titanium Ti:0.2～1.0wt%, all the other are zinc Zn, and impurity component (being other elements) total content is less than 0.1wt%.
The present invention is on the basis of existing common lead brass alloys; main use properties and requirement at leaded brass; and the requirement of combining environmental protection; in line with the principle that reduces cost; adopt the replacement environmental pollution of magnesium Mg element and human body is endangered more serious plumbous Pb element, thereby reach unleaded and cheap purpose.Compare with present no leaded brass with leaded brass, have following outstanding advantage and positively effect:
1, be a kind of unleaded brass material, can eliminate plumbous produce and use in harm that environment and human body are caused.
2, have good cutting performance, cold and hot formability, good mechanical property, have excellent corrosion resistance nature simultaneously again, can replace existing lead brass alloy, be applied to hot-water heating and defend abundant and other various production fields.
3, the aboundresources of China's magnesium Mg and aluminium Al is cheap, can reduce cost significantly.
4, production technique is simple, and is controlled.
Alloy of the present invention is specially adapted to hot-water heating and defends abundant and other various production fields.It is the new metallic material that helps HUMAN HEALTH and environment protection, also is the meeting of present widespread use causes the leaded brass of baneful influence to human body and environment another new type ideal substitute.
Embodiment
Following examples are intended to illustrate the present invention rather than limitation of the invention further.
Embodiment casts ingot casting, is squeezed into pole the alloying constituent in the environmental protection leadless easy-cutting magnesium brass alloy according to the form below one of the present invention.
Embodiment 1
Its technological process of production method is as follows:
Starting material are prepared and batching-melting-casting-ingot casting heating-extruding-stress relieving-finished product.
Detailed process is: medium-frequency induction furnace is adopted in melting, adds copper ingot and insulating covering agent charcoal earlier, in copper melts, presses the composition proportion batching of table one, adds zinc ingot metal, magnesium ingot in order.Making magnesium rapid solid solution in brass solution is intermetallic compound, and uniform distribution, and is cast as the magnesium BRASS FORGE under 1000-1050 ℃ in swage, presses at 750 ℃ of following warm extrusions, and carry out stress relieving under 380 ℃.
Embodiment 2
Its technological process of production method is as follows:
Starting material are prepared and batching-melting-casting-ingot casting heating-extruding-stress relieving-finished product.
Detailed process is: medium-frequency induction furnace is adopted in melting, adds copper ingot and insulating covering agent charcoal earlier, in copper melts, presses the composition proportion batching of table one, adds zinc ingot metal, magnesium ingot, aluminium ingot in order.Making magnesium rapid solid solution in brass solution is intermetallic compound, and uniform distribution, and is cast as the magnesium BRASS FORGE under 1000～1050 ℃ in swage, 550 ℃ of following low temperature extruding, and carries out stress relieving under 250 ℃.
Embodiment 3
Its technological process of production method is as follows:
Starting material are prepared and batching-melting-casting-ingot casting heating-extruding-stress relieving-finished product.
Detailed process is: medium-frequency induction furnace is adopted in melting, adds copper ingot and insulating covering agent sodium aluminum fluoride earlier, in copper melts, presses the composition proportion batching of table one, adds zinc ingot metal, magnesium ingot, bismuth ingot in order.Make magnesium in brass solution rapidly solid solution be intermetallic compound, and uniform distribution, and be cast as the magnesium BRASS FORGE under 1000～1050 ℃ in swage 750 ℃ of following high temperature extruding, and carries out stress relieving being lower than under 250 ℃.
Embodiment 4
Its technological process of production method is as follows:
Starting material are prepared and batching-melting-casting-ingot casting heating-extruding-stress relieving-finished product.
Detailed process is: medium-frequency induction furnace is adopted in melting, adds copper ingot and insulating covering agent sodium aluminum fluoride earlier, in copper melts, presses the composition proportion batching of table one, adds zinc ingot metal, copper titanium master alloy, magnesium ingot in order.Making magnesium rapid solid solution in brass solution is intermetallic compound, and uniform distribution, and is cast as the magnesium BRASS FORGE under 1000～1050 ℃ in swage.Be heated in resistance furnace behind the ingot casting railway carriage and carry out the low temperature extruding under 550 ℃, the round brass rod after the extruding carries out stress relieving under 250 ℃.
Embodiment 5～6 its technological process of productions are with implementation column 2.
Embodiment 7 its technological process of productions are with implementation column 3.
Embodiment 8 its technological process of productions are with implementation column 4.
The one-tenth of table 1 environmental protection leadless easy-cutting magnesium of the present invention brass is grouped into example: (weight percent)
| Embodiment | Cu | Mg | Al | Bi | Ti | Zn |
| Embodiment 1:Cu-Zn-Mg | 60.12 | 0.98 | Surplus | |||
| Embodiment 2:Cu-Zn-Mg-Al | 59.43 | 2.12 | 0.47 | Surplus | ||
| Embodiment 3:Cu-Zn-Mg-Bi | 62.78 | 0.54 | 0.81 | Surplus | ||
| Embodiment 4:Cu-Zn-Mg-Ti | 63.15 | 2.86 | 0.59 | Surplus | ||
| Embodiment 5:Cu-Zn-Mg-Al | 55.34 | 1.12 | 0.64 | Surplus | ||
| Embodiment 6:Cu-Zn-Mg-Al | 57.58 | 0.89 | 0.95 | Surplus | ||
| Embodiment 7:Cu-Zn-Mg-Bi | 58.64 | 1.52 | 1.35 | Surplus | ||
| Embodiment 8:Cu-Zn-Mg-Ti | 60.37 | 2.57 | 1.46 | Surplus |
Average mechanical property such as following table two after the leadless free-cutting brass alloy extruding annealing of the present invention, the contrast sample is the C3600 Winn bronze.
The mechanical property of table two magnesium brass
| Embodiment | Tensile strength MPa | Ultimate strength MPa | Unit elongation % |
| Embodiment 1:Cu-Zn-Mg | 575.1 | 421.8 | 18.4 |
| Embodiment 2:Cu-Zn-Mg-Al | 779.2 | 514.6 | 4.3 |
| Embodiment 3:Cu-Zn-Mg-Bi | 612.6 | 501.2 | 17.0 |
| Embodiment 4:Cu-Zn-Mg-Ti | 535.6 | 313.5 | 13.0 |
| Embodiment 5:Cu-Zn-Mg-Al | 509.7 | 312.3 | 12.5 |
| Embodiment 6:Cu-Zn-Mg-Al | 536.1 | 313.8 | 13.1 |
| Embodiment 7:Cu-Zn-Mg-Bi | 634.2 | 513.5 | 21.0 |
| Embodiment 8:Cu-Zn-Mg-Ti | 564.3 | 319.8 | 13.9 |
| C3600 | ≥450 | ≥350 | ≥7 |
Other performance index are as follows:
1, hot workability: suitable with C3600
2, cutting ability: the cutting ability that unleaded magnesium brass alloy embodiment pushes after the annealing is as follows, and the contrast sample is the C3600 Winn bronze.
Embodiment 1: the cutting index is greater than 75%
Embodiment 2: the cutting index is greater than 95%
Embodiment 3: the cutting index is greater than 88%
Embodiment 4: the cutting index is greater than 90%
Embodiment 5: the cutting index is greater than 92%
Embodiment 6: the cutting index is greater than 90%
Embodiment 7: the cutting index is greater than 90%
Embodiment 8: the cutting index is greater than 85%
C3600: the cutting index is 100%
2, corrosion resistance nature: unleaded magnesium brass alloy embodiment pushes the annealing back and carries out the dezincify experiment according to GB10119-88 dezincify experimental technique, and the contrast sample is the C3600 Winn bronze, and measured dezincify layer thickness is as follows, and the contrast sample is the C3600 Winn bronze.
The average dezincify layer thickness that embodiment 1 records is 200 μ m
The average dezincify layer thickness that embodiment 2 records is 451 μ m
The average dezincify layer thickness that embodiment 3 records is 468 μ m
The average dezincify layer thickness that embodiment 4 records is 521 μ m
The average dezincify layer thickness that embodiment 5 records is 384 μ m
The average dezincify layer thickness that embodiment 6 records is 296 μ m
The average dezincify layer thickness that embodiment 7 records is 478 μ m
The average dezincify layer thickness that embodiment 8 records is 534 μ m
The average dezincify layer thickness that C3600 records is greater than 600 μ m
The stress test of 3, stress test: embodiment, 1 to embodiment 8 annealing back sample all is up to state standards.
Claims (4)
1, a kind of leadless easy-cutting magnesium brass alloy, it is characterized in that: it is made up of copper, zinc, magnesium alloy element and unavoidable impurities and aluminium element, consisting of of described alloy: copper 59.43～63wt%, magnesium: 2.12～3.0wt%, aluminium: 0.2～1.5wt%, all the other are zinc, and the total content of impurity is not more than 0.1wt%.。
2, a kind of leadless easy-cutting magnesium brass alloy, it is characterized in that: it is made up of copper, zinc, magnesium alloy element and unavoidable impurities and titanium elements, consisting of of described alloy: copper 60.37～63wt%, magnesium: 2.57～3.0wt%, titanium: 0.2～1.46wt%, all the other are zinc, and the total content of impurity is not more than 0.1wt%.
3. the preparation method of an a kind of leadless easy-cutting magnesium brass alloy as claimed in claim 1, it is characterized in that: melting magnesium brass under the effect of insulating covering agent, making the rapid solid solution in the brass liquation of magnesium and aluminium is intermetallic compound, and uniform distribution, and under 1000～1050 ℃, be cast as the brass ingot casting, 500～760 ℃ of extruding, and under 200～400 ℃, carry out stress relieving.
4. preparation method as each described a kind of leadless easy-cutting magnesium brass alloy in the claim 2, it is characterized in that: melting magnesium brass under the effect of insulating covering agent, making the rapid solid solution in the brass liquation of magnesium and titanium is intermetallic compound, and uniform distribution, and under 1000～1050 ℃, be cast as the brass ingot casting, 500～760 ℃ of extruding, and under 200～400 ℃, carry out stress relieving.
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| CNB2007100359122A CN100552070C (en) | 2007-10-16 | 2007-10-16 | A kind of leadless easy-cutting magnesium brass alloy and preparation method thereof |
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| CNB2007100359122A CN100552070C (en) | 2007-10-16 | 2007-10-16 | A kind of leadless easy-cutting magnesium brass alloy and preparation method thereof |
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| CN100552070C true CN100552070C (en) | 2009-10-21 |
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Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101285137B (en) * | 2008-06-11 | 2010-06-02 | 路达(厦门)工业有限公司 | Leadless and free-cutting brass containing magnesium and manufacturing method for manufactures |
| CN103667779B (en) * | 2013-11-27 | 2015-12-09 | 余姚市士森铜材厂 | A kind of preparation method of lead-free reflow |
| CN103667778B (en) * | 2013-11-27 | 2015-10-28 | 余姚市士森铜材厂 | A kind of leadless environment-friendly brass of rolling and forming |
| CN103757471B (en) * | 2013-12-31 | 2015-12-09 | 安徽瑞庆信息科技有限公司 | A kind of leadless easy-cutting magnesium brass alloy material and preparation method thereof |
| CN103757476A (en) * | 2014-01-10 | 2014-04-30 | 滁州学院 | Magnesium-bismuth brass alloy material and preparation method thereof |
| CN104032200B (en) * | 2014-05-12 | 2016-05-18 | 蚌埠市宏威滤清器有限公司 | A kind of resistance to high temperature oxidation brass alloy material and preparation method thereof |
| CN105779813B (en) * | 2014-12-24 | 2018-01-02 | 百路达（厦门）工业有限公司 | Environment-protective free-cutting thermal crack resistant brass alloys |
| CN106011532B (en) * | 2016-06-30 | 2018-05-22 | 宁波金田铜业(集团)股份有限公司 | Drinking water transmission ＆ distribution special environment protection brass alloys and preparation method thereof |
| CN110117736B (en) * | 2019-06-17 | 2021-11-19 | 上海理工大学 | Corrosion-resistant bismuth brass alloy with good plasticity |
| DE102021119474A1 (en) | 2021-07-27 | 2023-02-02 | Diehl Brass Solutions Stiftung & Co. Kg | Lead and antimony free brass alloy |
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