CN104032172A - Leadless free-cutting corrosion-resistant brass alloy material and preparation method thereof - Google Patents
Leadless free-cutting corrosion-resistant brass alloy material and preparation method thereof Download PDFInfo
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- CN104032172A CN104032172A CN201410197487.7A CN201410197487A CN104032172A CN 104032172 A CN104032172 A CN 104032172A CN 201410197487 A CN201410197487 A CN 201410197487A CN 104032172 A CN104032172 A CN 104032172A
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Abstract
A leadless free-cutting corrosion-resistant brass alloy material comprises the chemical elements in percent by mass: 31-33% of Zn, 0.3-0.5% of Si, 0.07-0.12% of Bi, 3.1-3.5% of Al, 0.01-0.03% of Sn, 1.2-1.5% of Cr, 0.2-0.5% of Nb, 0.05-0.08% of Mo, and the balance Cu. By adding Si, Bi, Al, Sn, Cr, Nb, Mo and other elements into brass alloy, the alloy is increased in strength, keeps good processing performance, is good in cutting performance and excellent in corrosion resistance, also has extremely good dezincification resistance, and is capable of replacing lead brass, bismuth brass and silicon brass for preparing water heating parts, bathroom accessories, valves and various easily-corroded parts, and also the alloy material is low in lead content, environment-friendly and healthy. 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 present invention relates to the manufacture field of metal alloy compositions, relate in particular to a kind of lead-free free-cutting corrosion resistant brass 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 lead-free free-cutting corrosion resistant brass alloy material and preparation method thereof, this Cu alloy material has advantages of that intensity is high, corrosion-resistant, excellent cutting performance.
Technical scheme of the present invention is as follows:
A kind of lead-free free-cutting corrosion resistant brass alloy material, is characterized in that: chemical element composition and mass percent thereof that it contains are: zinc 31-33, silicon 0.3-0.5, bismuth 0.07-0.12, aluminium 3.1-3.5, tin 0.01-0.03, Cr1.2-1.5, Nb0.2-0.5, Mo0.05-0.08, surplus are copper.
The production method of described lead-free free-cutting corrosion resistant brass alloy material, is characterized in that:
(1), preparing fine copper and copper scrap originates as copper matrix in 1:0.3-0.6 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) silicon, bismuth, Cr; (3) aluminium, tin, Mo; (4) other remaining components; The each batch of timed interval of dropping into element is 22-25 minute, after feeding intake, stirs.
Described casting postheat treatment is: be first warming up to 250-260 DEG C by room temperature with 210-220 DEG C/h of speed, and insulation 50-60 minute, then be warming up to 580-600 DEG C with 210-220 DEG C/h of speed, insulation 1-2 hour; Be cooled to 100-120 DEG C with 260-270 DEG C/h of speed again, insulation 1-2 hour; Be warming up to 390-400 DEG C with 210-220 DEG C/h of speed again, insulation 1-2 hour; Be cooled to 100-120 DEG C with 260-270 DEG C/h of speed again; Be warming up to 290-300 DEG C with 210-220 DEG C/h of speed again, insulation 2-3 hour, takes out air cooling and get final product.
Described refining agent is made up of 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 DEG C, 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
Brass alloys of the present invention are by adding the elements such as silicon, bismuth, aluminium, tin, Cr, Nb, Mo, make the strength increase of alloy, and keep good processing characteristics, excellent cutting performance, excellent anti-corrosion performance, also has good anti dezincification character energy, and alternative leaded brass, bismuth brass, silicon brass are for hot-water heating, bathroom, valve and various perishable parts, and this alloy material is leaded low, environment protection health.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 lead-free free-cutting corrosion resistant brass alloy material, chemical element composition and mass percent thereof that it contains are: zinc 31-33, silicon 0.3-0.5, bismuth 0.07-0.12, aluminium 3.1-3.5, tin 0.01-0.03, Cr1.2-1.5, Nb0.2-0.5, Mo0.05-0.08, surplus are copper.
The production method of described lead-free free-cutting corrosion resistant brass alloy 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) silicon, bismuth, Cr; (3) aluminium, tin, Mo; (4) other remaining components; The each batch of timed interval of dropping into element is 24 minutes, after feeding intake, stirs.
Described casting postheat treatment is: be first warming up to 255 DEG C by room temperature with 215 DEG C/h of speed, be incubated 55 minutes, then be warming up to 590 DEG C with 215 DEG C/h of speed, be incubated 1.5 hours; Be cooled to 105 DEG C with 265 DEG C/h of speed again, be incubated 1.5 hours; Be warming up to 395 DEG C with 215 DEG C/h of speed again, be incubated 1.5 hours; Be cooled to 105 DEG C with 265 DEG C/h of speed again; Be warming up to 295 DEG C with 215 DEG C/h of speed 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 DEG C, 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 lead-free free-cutting corrosion resistant brass alloy material, tensile strength б b is 516Mpa, yield strength 480MPa, hardness value HB is 146, electric conductivity %IACS62,593 DEG C of softening temperatures, unit elongation 13%.
Claims (4)
1. a lead-free free-cutting corrosion resistant brass alloy material, is characterized in that: chemical element composition and mass percent thereof that it contains are: zinc 31-33, silicon 0.3-0.5, bismuth 0.07-0.12, aluminium 3.1-3.5, tin 0.01-0.03, Cr1.2-1.5, Nb0.2-0.5, Mo0.05-0.08, surplus are copper.
2. the production method of lead-free free-cutting corrosion resistant brass alloy material according to claim 1, is characterized in that:
(1), preparing fine copper and copper scrap originates as copper matrix in 1:0.3-0.6 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) silicon, bismuth, Cr; (3) aluminium, tin, Mo; (4) other remaining components; The each batch of timed interval of dropping into element is 22-25 minute, after feeding intake, stirs.
3. the production method of lead-free free-cutting corrosion resistant brass alloy material according to claim 2, it is characterized in that: described casting postheat treatment is: be first warming up to 250-260 DEG C by room temperature with 210-220 DEG C/h of speed, insulation 50-60 minute, be warming up to 580-600 DEG C with 210-220 DEG C/h of speed again, insulation 1-2 hour; Be cooled to 100-120 DEG C with 260-270 DEG C/h of speed again, insulation 1-2 hour; Be warming up to 390-400 DEG C with 210-220 DEG C/h of speed again, insulation 1-2 hour; Be cooled to 100-120 DEG C with 260-270 DEG C/h of speed again; Be warming up to 290-300 DEG C with 210-220 DEG C/h of speed again, insulation 2-3 hour, takes out air cooling and get final product.
4. the production method of lead-free free-cutting corrosion resistant brass alloy material according to claim 2, is characterized in that: described refining agent is made up of 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 DEG C, 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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| CN201410197487.7A CN104032172A (en) | 2014-05-12 | 2014-05-12 | Leadless free-cutting corrosion-resistant brass alloy material and preparation method thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107130137A (en) * | 2017-06-27 | 2017-09-05 | 华南理工大学 | A kind of low-pressure casting process of environmentally friendly silizin tap |
| CN109266900A (en) * | 2018-12-07 | 2019-01-25 | 宁波艾维洁具有限公司 | A kind of Anti-dezincificationyellow yellow brass alloy of lead-free corrosion resistant and preparation method thereof |
| CN113430416A (en) * | 2021-06-21 | 2021-09-24 | 宁波兴敖达金属新材料有限公司 | Lead-free-cutting high-conductivity tellurium-copper alloy material |
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| JPS5974250A (en) * | 1982-10-19 | 1984-04-26 | Mitsubishi Electric Corp | Heat resistant copper alloy |
| US5582281A (en) * | 1994-07-19 | 1996-12-10 | Chuetsu Metal Works Co., Ltd. | Method of connecting a sliding member to a synchronizer ring |
| 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 |
| CN1856588A (en) * | 2003-09-19 | 2006-11-01 | 住友金属工业株式会社 | Copper alloy and method for production thereof |
| CN102676875A (en) * | 2012-06-12 | 2012-09-19 | 杨晓锋 | Shell with good heat dissipation performance made of complex copper-zinc alloy |
| CN103757475A (en) * | 2014-01-10 | 2014-04-30 | 滁州学院 | High-strength free-cutting tin brass alloy material and preparation method thereof |
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2014
- 2014-05-12 CN CN201410197487.7A patent/CN104032172A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5974250A (en) * | 1982-10-19 | 1984-04-26 | Mitsubishi Electric Corp | Heat resistant copper alloy |
| US5582281A (en) * | 1994-07-19 | 1996-12-10 | Chuetsu Metal Works Co., Ltd. | Method of connecting a sliding member to a synchronizer ring |
| 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 |
| CN1856588A (en) * | 2003-09-19 | 2006-11-01 | 住友金属工业株式会社 | Copper alloy and method for production thereof |
| CN102676875A (en) * | 2012-06-12 | 2012-09-19 | 杨晓锋 | Shell with good heat dissipation performance made of complex copper-zinc alloy |
| 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 (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107130137A (en) * | 2017-06-27 | 2017-09-05 | 华南理工大学 | A kind of low-pressure casting process of environmentally friendly silizin tap |
| CN107130137B (en) * | 2017-06-27 | 2018-10-09 | 华南理工大学 | A kind of low-pressure casting process of environmental protection silizin tap |
| CN109266900A (en) * | 2018-12-07 | 2019-01-25 | 宁波艾维洁具有限公司 | A kind of Anti-dezincificationyellow yellow brass alloy of lead-free corrosion resistant and preparation method thereof |
| CN113430416A (en) * | 2021-06-21 | 2021-09-24 | 宁波兴敖达金属新材料有限公司 | Lead-free-cutting high-conductivity tellurium-copper alloy material |
| CN113430416B (en) * | 2021-06-21 | 2024-01-23 | 宁波兴敖达金属新材料有限公司 | Lead-free-cutting high-conductivity tellurium copper alloy material |
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Application publication date: 20140910 |