CN103757476A - Magnesium-bismuth brass alloy material and preparation method thereof - Google Patents
Magnesium-bismuth brass alloy material and preparation method thereof Download PDFInfo
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- CN103757476A CN103757476A CN201410011620.5A CN201410011620A CN103757476A CN 103757476 A CN103757476 A CN 103757476A CN 201410011620 A CN201410011620 A CN 201410011620A CN 103757476 A CN103757476 A CN 103757476A
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Abstract
The invention relates to a magnesium-bismuth brass alloy material which contains the following chemical components in percentage by mass: 6.5-5.9% of magnesium, 0.25-0.29% of bismuth, 11.5-11.9% of zinc, 0.04-0.06% of Ta, 1.6-1.8% of Mn, 0.4-0.5% of Be and the balance of copper. The alloy has the characteristics of no toxicity, environment friendliness, free cutting, lower cost than bismuth brass, high-temperature oxidation resistance, higher strength and favorable cold/hot working properties, and can be forged and cast into wires, bars and many other parts; and by reasonably controlling the after-casting treatment temperature and using waste copper as the raw material, the core hardness is basically consistent with the surface hardness, and the alloy quality is uniform. When the refining agent is used for casting production, the porosity in the casting is lowered by 1-2 degrees, the oxide inclusion content is at level 2 or so, and the yield is obviously enhanced.
Description
Technical field
The manufacture field that the present invention relates to metal alloy compositions, relates in particular to a kind of magnesium-bismuth-brass alloys material and preparation method thereof.
Background technology
Copper is because of its good electroconductibility, plasticity-, and erosion resistance, applies very extensive.In copper alloy, add Lv ﹑ Nie ﹑ Meng ﹑ Xi ﹑ Gui ﹑ lead and other elements, can improve the performance of copper, for different places.Still there are some problems in the existing copper alloy of China at present, and as alloy contains a large amount of impurity elements, high temperature fatigue is poor, hot strength is low; Hardness is low, wears no resistance, frictional coefficient is large, and work-ing life is short; Poorly conductive, waste electric energy; Bending machining performance is poor, easily fractures; Quality weight, constructional difficulties; Can't meet market demands.
Summary of the invention
The object of the present invention is to provide a kind of magnesium-bismuth-brass alloys material and preparation method thereof, this Cu alloy material has advantages of easy cutting, good processability, high temperature oxidation resisting.
Technical scheme of the present invention is as follows:
A kind of magnesium-bismuth-brass alloys material, is characterized in that: chemical element composition and mass percent thereof that it contains are: magnesium 6.5-6.9, bismuth 0.25-0.29, zinc 11.5-11.9, Ta0.04-0.06, Mn1.6-1.8, Be0.4-0.5, surplus are copper.
The production method of described magnesium-bismuth-brass alloys material, is characterized in that:
(1), preparing fine copper and copper scrap originates as copper matrix in 1:0.3-0.8 ratio, fine copper is added to drop in stove and melt, carry out removing impurities matter, deoxidation, employing refining agent initial refining, add alloying constituent and carry out alloying, then add copper scrap fusing, add refining agent secondary refining, detection and adjust chemical element component content to qualified, casting, casting postheat treatment etc.;
(2) in alloying process, to the lot sequence that drops into alloying element in stove, be: (1) zinc; (2) bismuth, manganese, Ta; (3) other remaining components; The each batch of timed interval of dropping into element is 20-24 minute, after feeding intake, stirs.
Described casting postheat treatment is: first by room temperature, with 250-260 ℃/h of speed, be warming up to 330-350 ℃, then be cooled to 280-290 ℃ with 200-210 ℃/h of speed, then be warming up to 550-570 ℃ with 250-260 ℃/h of speed, insulation 1-2 hour; With 270-280 ℃/h of speed, be cooled to 100-120 ℃ again, insulation 1-2 hour; With 250-260 ℃/h of speed, be warming up to 340-360 ℃ again, insulation 1-2 hour; With 250-260 ℃/h of speed, be cooled to 100-120 ℃ again, insulation 1-2 hour; With 200-210 ℃/h of speed, be warming up to 300-310 ℃ again, insulation 2-3 hour, takes out air cooling and get final product.
Described refining agent is made by the raw material of following weight part: Paris white 4-5, bauxitic clay 2.1-2.5, trees ashes 1-2, nano silicon 1-2, alum 2-3, jade powder 3-4, calcium carbide powder 4-5, potassium fluotitanate 2-3, sodium tetraborate 1-2, Bi
2o
32-3; Its preparation method is that Paris white, bauxitic clay, trees ashes, nano silicon, alum, jade powder, calcium carbide powder are mixed, be heated to 2600-3000 ℃, stir 1-2 hour, after cooling, be added in the hydrochloric acid soln of 10-15%, soak 1-2 hour, filter, filter residue is cleaned with clear water repeatedly, dries, and merges and mixes and get final product with other composition.
Beneficial effect of the present invention
Alloy of the present invention has the free machining feature of asepsis environment-protecting, and cost is low compared with bismuth brass, also has the feature of high-temperature oxidation resistant, and intensity is higher, and cold and hot working performance is good, can forge, be cast as the various parts such as wire rod, excellent class; By reasonable control casting post-processing temperature, use copper scrap as raw material, make core hardness and surface hardness basically identical, alloy quality homogeneous.Refining agent of the present invention, for Foundry Production, can make the degree of porosity in foundry goods reduce 1-2 degree, and oxide inclusion, 2 grades of left and right, obviously improves yield rate.
Embodiment
A kind of magnesium-bismuth-brass alloys material, chemical element composition and mass percent thereof that it contains are: magnesium 6.5-6.9, bismuth 0.25-0.29, zinc 11.5-11.9, Ta0.04-0.06, Mn1.6-1.8, Be0.4-0.5, surplus are copper.
The production method of described magnesium-bismuth-brass alloys material is as follows:
(1), preparing fine copper and copper scrap originates as copper matrix in 1:0.5 ratio, fine copper is added to drop in stove and melt, carry out removing impurities matter, deoxidation, employing refining agent initial refining, add alloying constituent and carry out alloying, then add copper scrap fusing, add refining agent secondary refining, detection and adjust chemical element component content to qualified, casting, casting postheat treatment etc.;
(2) in alloying process, to the lot sequence that drops into alloying element in stove, be: (1) zinc; (2) bismuth, manganese, Ta; (3) other remaining components; The each batch of timed interval of dropping into element is 22 minutes, after feeding intake, stirs.
Described casting postheat treatment is: first by room temperature, with 255 ℃/h of speed, be warming up to 340 ℃, then be cooled to 285 ℃ with 205 ℃/h of speed, then be warming up to 560 ℃ with 255 ℃/h of speed, be incubated 1.5 hours; With 2750 ℃/h of speed, be cooled to 110 ℃ again, be incubated 1.5 hours; With 255 ℃/h of speed, be warming up to 350 ℃ again, be incubated 1.5 hours; With 255 ℃/h of speed, be cooled to 110 ℃ again, be incubated 1.5 hours; With 205 ℃/h of speed, be warming up to 305 ℃ again, be incubated 2.5 hours, take out air cooling and get final product.
Described refining agent by following weight part (kilogram) raw material make: Paris white 5, bauxitic clay 2.1, trees ashes 1, nano silicon 2, alum 2, jade powder 4, calcium carbide powder 4, potassium fluotitanate 3, sodium tetraborate 2, Bi
2o
32; Its preparation method is that Paris white, bauxitic clay, trees ashes, nano silicon, alum, jade powder, calcium carbide powder are mixed, be heated to 2600-3000 ℃, stir 1-2 hour, after cooling, be added in the hydrochloric acid soln of 10-15%, soak 1-2 hour, filter, filter residue is cleaned with clear water repeatedly, dries, and merges and mixes and get final product with other composition.
The present embodiment magnesium-bismuth-brass alloys material, tensile strength б b is 510Mpa, yield strength 486MPa, hardness value HB is 134, electric conductivity %IACS54,602 ℃ of softening temperatures, 20 ℃ of unit elongation 16%.
Claims (4)
1. a magnesium-bismuth-brass alloys material, is characterized in that: chemical element composition and mass percent thereof that it contains are: magnesium 6.5-6.9, bismuth 0.25-0.29, zinc 11.5-11.9, Ta0.04-0.06, Mn1.6-1.8, Be0.4-0.5, surplus are copper.
2. the production method of magnesium-bismuth-brass alloys material according to claim 1, is characterized in that:
(1), preparing fine copper and copper scrap originates as copper matrix in 1:0.3-0.8 ratio, fine copper is added to drop in stove and melt, carry out removing impurities matter, deoxidation, employing refining agent initial refining, add alloying constituent and carry out alloying, then add copper scrap fusing, add refining agent secondary refining, detection and adjust chemical element component content to qualified, casting, casting postheat treatment etc.;
(2) in alloying process, to the lot sequence that drops into alloying element in stove, be: (1) zinc; (2) bismuth, manganese, Ta; (3) other remaining components; The each batch of timed interval of dropping into element is 20-24 minute, after feeding intake, stirs.
3. the production method of magnesium-bismuth-brass alloys material according to claim 2, it is characterized in that: described casting postheat treatment is: first by room temperature, with 250-260 ℃/h of speed, be warming up to 330-350 ℃, with 200-210 ℃/h of speed, be cooled to 280-290 ℃ again, with 250-260 ℃/h of speed, be warming up to 550-570 ℃ again, insulation 1-2 hour; With 270-280 ℃/h of speed, be cooled to 100-120 ℃ again, insulation 1-2 hour; With 250-260 ℃/h of speed, be warming up to 340-360 ℃ again, insulation 1-2 hour; With 250-260 ℃/h of speed, be cooled to 100-120 ℃ again, insulation 1-2 hour; With 200-210 ℃/h of speed, be warming up to 300-310 ℃ again, insulation 2-3 hour, takes out air cooling and get final product.
4. the production method of magnesium-bismuth-brass alloys material according to claim 2, is characterized in that: described refining agent is made by the raw material of following weight part: Paris white 4-5, bauxitic clay 2.1-2.5, trees ashes 1-2, nano silicon 1-2, alum 2-3, jade powder 3-4, calcium carbide powder 4-5, potassium fluotitanate 2-3, sodium tetraborate 1-2, Bi
2o
32-3; Its preparation method is that Paris white, bauxitic clay, trees ashes, nano silicon, alum, jade powder, calcium carbide powder are mixed, be heated to 2600-3000 ℃, stir 1-2 hour, after cooling, be added in the hydrochloric acid soln of 10-15%, soak 1-2 hour, filter, filter residue is cleaned with clear water repeatedly, dries, and merges and mixes and get final product with other composition.
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| CN201410011620.5A CN103757476A (en) | 2014-01-10 | 2014-01-10 | Magnesium-bismuth brass alloy material and preparation method thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104032163A (en) * | 2014-05-12 | 2014-09-10 | 蚌埠市宏威滤清器有限公司 | Free-cutting brass alloy material and preparation method thereof |
| CN104032170A (en) * | 2014-05-12 | 2014-09-10 | 蚌埠市宏威滤清器有限公司 | Free-cutting brass alloy material and preparation method thereof |
| CN104032175A (en) * | 2014-05-12 | 2014-09-10 | 蚌埠市宏威滤清器有限公司 | Lanthanum-containing brass alloy material and preparation method thereof |
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| JP2002266042A (en) * | 2001-03-09 | 2002-09-18 | Kobe Steel Ltd | Copper alloy sheet having excellent bending workability |
| CN1517446A (en) * | 2003-01-22 | 2004-08-04 | ͬ�Ϳ�ҵ��ʽ���� | Copper-based alloy and its manufacturing method |
| CN101161836A (en) * | 2007-10-16 | 2008-04-16 | 中南大学 | Leadless easy-cutting magnesium brass alloy and method for preparing same |
| CN101289714A (en) * | 2007-04-18 | 2008-10-22 | 北京有色金属研究总院 | Lead-free and easy-cutting magnesium-bismuth-brass alloys |
| CN103397221A (en) * | 2013-07-01 | 2013-11-20 | 安徽三联泵业股份有限公司 | Copper alloy for drawing mould and preparation method thereof |
-
2014
- 2014-01-10 CN CN201410011620.5A patent/CN103757476A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002266042A (en) * | 2001-03-09 | 2002-09-18 | Kobe Steel Ltd | Copper alloy sheet having excellent bending workability |
| CN1517446A (en) * | 2003-01-22 | 2004-08-04 | ͬ�Ϳ�ҵ��ʽ���� | Copper-based alloy and its manufacturing method |
| CN101289714A (en) * | 2007-04-18 | 2008-10-22 | 北京有色金属研究总院 | Lead-free and easy-cutting magnesium-bismuth-brass alloys |
| CN101161836A (en) * | 2007-10-16 | 2008-04-16 | 中南大学 | Leadless easy-cutting magnesium brass alloy and method for preparing same |
| CN103397221A (en) * | 2013-07-01 | 2013-11-20 | 安徽三联泵业股份有限公司 | Copper alloy for drawing mould and preparation method thereof |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104032163A (en) * | 2014-05-12 | 2014-09-10 | 蚌埠市宏威滤清器有限公司 | Free-cutting brass alloy material and preparation method thereof |
| CN104032170A (en) * | 2014-05-12 | 2014-09-10 | 蚌埠市宏威滤清器有限公司 | Free-cutting brass alloy material and preparation method thereof |
| CN104032175A (en) * | 2014-05-12 | 2014-09-10 | 蚌埠市宏威滤清器有限公司 | Lanthanum-containing brass alloy material and preparation method thereof |
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