CN104032179A - Leadless environment-friendly copper alloy material and preparation method thereof - Google Patents
Leadless environment-friendly copper alloy material and preparation method thereof Download PDFInfo
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- CN104032179A CN104032179A CN201410197553.0A CN201410197553A CN104032179A CN 104032179 A CN104032179 A CN 104032179A CN 201410197553 A CN201410197553 A CN 201410197553A CN 104032179 A CN104032179 A CN 104032179A
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Abstract
A leadless environment-friendly copper alloy material comprises the chemical elements in percent by mass: 5.0-5.5% of Mn,0.5-0.8% of Sn, 3.0-3.5% of Zn, 2.2-2.5% of Mg, 1.0-1.2% of W, 0.03-0.05% of Mo, 0.005-0.008% of Sb, and the balance Cu. By adding Mn, Zn, Sb and other elements, the copper alloy is improved in hardness, wear resistance and cutting performance; by adding W and Mo, the alloy is improved in melting point and increased in density and hardness; by adding Sn and Mg, the alloy is increased in seawater corrosion resistance and high-temperature oxidation resistance; and the hardness of the core part and the hardness of the surface are basically consistent, and alloy quality is uniform. The copper alloy is excellent in comprehensive performances, can be used to prepare multiple parts, and is leadless and environment-friendly. An employed refining agent is used for casting production, is capable of reducing the porosity degree of a casting by 1-2 degree and enabling the oxide inclusions to be around second grade, and helps to obviously improve the yield.
Description
Technical field
The manufacture field that the present invention relates to metal alloy compositions, relates in particular to a kind of leadless environment-friendly Cu alloy 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 leadless environment-friendly Cu alloy material and preparation method thereof, this Cu alloy material has advantages of that hardness is high, good processability, leadless environment-friendly, corrosion-resistant and high-temperature resistant oxidation.
Technical scheme of the present invention is as follows:
A leadless environment-friendly Cu alloy material, is characterized in that: chemical element composition and mass percent thereof that it contains are: manganese 5.0-5.5, tin 0.5-0.8, zinc 3.0-3.5, magnesium 2.2-2.5, tungsten 1.0-1.2, molybdenum 0.03-0.05, antimony 0.005-0.008, surplus are copper.
The production method of described leadless environment-friendly Cu alloy material, is characterized in that:
(1), preparing fine copper and copper scrap originates as copper matrix in 1:0.5-1 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) manganese, tin, molybdenum; (2) zinc, magnesium; (3) other remaining components; The timed interval that each batch drops into element is 21-23 minute, after feeding intake, stirs.
Described casting postheat treatment is: first by room temperature, with 210-220 ℃/h of speed, be warming up to 400-420 ℃, and insulation 50-60 minute, then with 220-230 ℃/h of speed, be warming up to 560-570 ℃, insulation 1-2 hour; With 250-260 ℃/h of speed, be cooled to 100-120 ℃ again, insulation 1-2 hour; With 240-250 ℃/h of speed, be warming up to 370-380 ℃ again, insulation 1-2 hour; With 250-260 ℃/h of speed, be cooled to 100-120 ℃ again; 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: silica 1 5-20, rhombspar 3-5, bitter water chestnut soil 4-8, clay 30-35, titanium dioxide 2-3, fluorite 6-8, jade powder 3-4, montmorillonite 1-2, trees ashes 1-2, Na
2tiF
68-10, Sodium Silicofluoride 3-4; Its preparation method is that silicon-dioxide, rhombspar, bitter water chestnut soil, clay, titanium dioxide, fluorite, jade powder, montmorillonite, trees ashes 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, by adding the elements such as manganese, zinc, antimony, has improved hardness, wear resistance and the cutting ability of copper alloy; By adding tungsten, molybdenum, improved the fusing point of alloy, increased density and hardness; By adding tin, magnesium, increased resistance to corrosion seawater and the high-temperature oxidation of alloy; By reasonable control casting post-processing temperature, use copper scrap as raw material, make core hardness and surface hardness basically identical, alloy quality homogeneous.Copper alloy excellent combination property of the present invention, can process various parts, simultaneously leadless environment-friendly.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 leadless environment-friendly Cu alloy material, chemical element composition and mass percent thereof that it contains are: manganese 5.0-5.5, tin 0.5-0.8, zinc 3.0-3.5, magnesium 2.2-2.5, tungsten 1.0-1.2, molybdenum 0.03-0.05, antimony 0.005-0.008, surplus are copper.
The production method of described leadless environment-friendly Cu alloy material is:
(1), preparing fine copper and copper scrap originates as copper matrix in 1:0.7 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) manganese, tin, molybdenum; (2) zinc, magnesium; (3) other remaining components; The timed interval that each batch drops into element is 22 minutes, after feeding intake, stirs.
Described casting postheat treatment is: first by room temperature, with 215 ℃/h of speed, be warming up to 410 ℃, be incubated 55 minutes, then be warming up to 565 ℃ with 225 ℃/h of speed, be incubated 1.5 hours; With 255 ℃/h of speed, be cooled to 110 ℃ again, be incubated 1.5 hours; With 245 ℃/h of speed, be warming up to 375 ℃ again, be incubated 1.5 hours; With 255 ℃/h of speed, be cooled to 110 ℃ again; 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: silica 15, rhombspar 3, bitter water chestnut soil 4, clay 30, titanium dioxide 2, fluorite 8, jade powder 4, montmorillonite 1, trees ashes 2, Na
2tiF
68, Sodium Silicofluoride 3; Its preparation method is that silicon-dioxide, rhombspar, bitter water chestnut soil, clay, titanium dioxide, fluorite, jade powder, montmorillonite, trees ashes 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 leadless environment-friendly Cu alloy material, tensile strength б b is 610Mpa, yield strength 535MPa, hardness value HB is 146, electric conductivity %IACS60,595 ℃ of softening temperatures, 20 ℃ of unit elongation 13.5%.
Claims (4)
1. a leadless environment-friendly Cu alloy material, is characterized in that: chemical element composition and mass percent thereof that it contains are: manganese 5.0-5.5, tin 0.5-0.8, zinc 3.0-3.5, magnesium 2.2-2.5, tungsten 1.0-1.2, molybdenum 0.03-0.05, antimony 0.005-0.008, surplus are copper.
2. the production method of leadless environment-friendly Cu alloy material according to claim 1, is characterized in that:
(1), preparing fine copper and copper scrap originates as copper matrix in 1:0.5-1 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) manganese, tin, molybdenum; (2) zinc, magnesium; (3) other remaining components; The timed interval that each batch drops into element is 21-23 minute, after feeding intake, stirs.
3. the production method of leadless environment-friendly Cu alloy material according to claim 2, it is characterized in that: described casting postheat treatment is: first by room temperature, with 210-220 ℃/h of speed, be warming up to 400-420 ℃, insulation 50-60 minute, with 220-230 ℃/h of speed, be warming up to 560-570 ℃ again, insulation 1-2 hour; With 250-260 ℃/h of speed, be cooled to 100-120 ℃ again, insulation 1-2 hour; With 240-250 ℃/h of speed, be warming up to 370-380 ℃ again, insulation 1-2 hour; With 250-260 ℃/h of speed, be cooled to 100-120 ℃ again; 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 leadless environment-friendly Cu alloy material according to claim 2, is characterized in that: described refining agent is made by the raw material of following weight part: silica 1 5-20, rhombspar 3-5, bitter water chestnut soil 4-8, clay 30-35, titanium dioxide 2-3, fluorite 6-8, jade powder 3-4, montmorillonite 1-2, trees ashes 1-2, Na
2tiF
68-10, Sodium Silicofluoride 3-4; Its preparation method is that silicon-dioxide, rhombspar, bitter water chestnut soil, clay, titanium dioxide, fluorite, jade powder, montmorillonite, trees ashes 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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| CN201410197553.0A CN104032179A (en) | 2014-05-12 | 2014-05-12 | Leadless environment-friendly copper alloy material and preparation method thereof |
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| CN201410197553.0A CN104032179A (en) | 2014-05-12 | 2014-05-12 | Leadless environment-friendly copper alloy material and preparation method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105127384A (en) * | 2015-09-08 | 2015-12-09 | 安徽天大铜业有限公司 | Casting crystallizer stop block |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003119527A (en) * | 2001-10-12 | 2003-04-23 | Chuetsu Metal Works Co Ltd | Lead-free copper alloy for sliding part |
| CN1517446A (en) * | 2003-01-22 | 2004-08-04 | ͬ�Ϳ�ҵ��ʽ���� | Copper-based alloy and its manufacturing method |
| CN103757475A (en) * | 2014-01-10 | 2014-04-30 | 滁州学院 | High-strength free-cutting tin brass alloy material and preparation method thereof |
-
2014
- 2014-05-12 CN CN201410197553.0A patent/CN104032179A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003119527A (en) * | 2001-10-12 | 2003-04-23 | Chuetsu Metal Works Co Ltd | Lead-free copper alloy for sliding part |
| CN1517446A (en) * | 2003-01-22 | 2004-08-04 | ͬ�Ϳ�ҵ��ʽ���� | Copper-based alloy and its manufacturing method |
| CN103757475A (en) * | 2014-01-10 | 2014-04-30 | 滁州学院 | High-strength free-cutting tin brass alloy material and preparation method thereof |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105127384A (en) * | 2015-09-08 | 2015-12-09 | 安徽天大铜业有限公司 | Casting crystallizer stop block |
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Application publication date: 20140910 |
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