CN102443717B - Low-cost elastic brass alloy - Google Patents
Low-cost elastic brass alloy Download PDFInfo
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- CN102443717B CN102443717B CN201210005315.6A CN201210005315A CN102443717B CN 102443717 B CN102443717 B CN 102443717B CN 201210005315 A CN201210005315 A CN 201210005315A CN 102443717 B CN102443717 B CN 102443717B
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Abstract
The invention discloses a low-cost elastic brass alloy. The alloy is characterized by comprising the following components by weight percent: 69-72% of copper, 23-26% of zinc, 3.3-3.6% of aluminum, 0.1-1.0% of nickel, 0.12-0.53% of manganese and the balance inevitable impurities. The low-cost elastic brass has the same hardness, elastic modulus and elongation rate as phosphor bronze; and the strength is higher than that of phosphor bronze in the Y2 state. The product is used to prepare connectors and conduct tests such as insert and extract and monopole lifting, and the obtained parameters all conform to the national standards. Meanwhile, the preparation process of the alloy is easy, the processing method is simple and the alloy is suitable for industrialized production. The elastic brass has the similar performances to phosphor bronze and the raw material cost is only 75%-80% of that of phosphor bronze, thus the elastic brass alloy can be used in the connector field to replace the phosphor bronze alloy.
Description
Technical field
The present invention relates to a kind of low-cost elastic brass alloy replacing tin-phosphor bronze material.
Background technology
Snappiness copper-based material is widely used in the industrial circles such as the various elastic element field such as electrical connector, spring, switch, contact and electronics, communication, instrument.At present, snappiness copper-based material is based on the material such as berylliumbronze, tin-phosphor bronze.But it is low to there is working temperature in berylliumbronze, complex manufacturing, the shortcomings such as beryllium oxide compound is poisonous, harmful to human, expensive, and alloying element tin in tin-phosphor bronze is expensive, manufacture that energy consumption is high, cost is high.Meanwhile, the rapid growth period that China being in economical, electronics, the industry development such as electric are rapid, very fast to the demand growth of tin-phosphor bronze band, with the speed increment of average annual more than 12%.It is predicted, the demand of domestic tin phosphorus bronze band in 2011 will more than 200,000 tons.Therefore, the substitute-low cost snappiness copper-based material studying tin-phosphor bronze is devoted to both at home and abroad.But up to now, also do not develop a kind of cost low elasticity good, the novel elastic alloy material that tin-phosphor bronze makes connector applications can be substituted.
CN101050494B has announced a kind of material of spring brass alloy and production method thereof, but its ni content reaches 4-5%, and because the cost ratio tin of nickel is high, therefore, the spring brass alloy cost of this invention is very high.
Summary of the invention
The object of the invention is to develop a kind of low-cost elastic brass alloy material, with the application of alternative tin-phosphor bronze in fields such as connectors.
A kind of low-cost elastic brass alloy, it is characterized in that copper is 69 ~ 72% weight, zinc is 23 ~ 26% weight, and aluminium is 3.3 ~ 3.6% weight, and nickel is 0.1 ~ 1.0% weight, and manganese is 0.12 ~ 0.53% weight, and surplus is inevitable impurity.
Spring brass preparation technology of the present invention adopts iron mould casting, hot rolling cogging, cold rolling, annealing, the technical process such as pickling.
Reduce alpha phase zone after aluminium element adds, the trend forming β phase is large, and strengthening effect is good.Can alumina protective layer be formed in melting, stop zinc evaporation, thus reduce zinc scaling loss.Meanwhile, aluminium can improve wear resistance, solidity to corrosion, elasticity etc.In finished product, the surface ionizing tendency of Al is larger than zinc, the pellumina that preferential formation is fine and close and firm, can prevent the further oxidation of alloy.But during Al content height, there will be γ phase, put forward heavy alloyed intensity and hardness, significantly reduce plasticity, be unfavorable for that rear road processes.Therefore, Al add-on general control is at about 1-4%.As HAl77-2, HAl60-1-1, HAl59-3-2 Young's modulus after processing can reach 102 respectively, 105,100Gpa.
Nickel makes alpha phase zone expand in brass, in Mock platina, add nickel, can obtain the high-strength alloy containing a small amount of β phase.Have simultaneously and improve intensity, toughness, anti-dezincify and stress corrosion dehiscence resistant effect, and pressure machining characteristics is better.Such as HNi65-5 Young's modulus can reach 112Gpa.There are some researches show: add the effect that Ni can reach remarkable crystal grain thinning.It should be noted that and add a certain amount of nickel and aluminium in brass, there is significant temper hardening effect.
Mn makes alpha phase zone reduce, but effect is little, therefore less on the impact of brass microstructure.Meanwhile, Mn to brass have significant solution strengthening, anticorrosive, improve the effect of processing characteristics.The Young's modulus of such as HMn58-2 can reach 100Gpa.It should be noted that because alloy is lower than at the temperature of 375 DEG C, the solid solubility of Mn in Cu declines, and when Mn content is more than 4%, can separate out the ξ phase of the rich Mn of part, ξ phase is hard crisp phase, and alloy property is reduced.Meanwhile, Mn adds the serious specific conductivity reducing material, and to when having the alloy designs of certain specific conductivity, control Mn content just seems particularly important.
Al and Ni has formation Al
3the trend of Ni compound, significantly improved the performance of material, and Mn is solid-solution in Cu-Zn matrix, significantly improves the performance of matrix by mechanism such as dispersion-strengthened, vertically hung scroll decomposition, solution strengthening, and promotes that Al and Ni forms Al
3ni compound.The comprehensive action of three kinds of elements will improve the performance of material, especially elastic performance widely.
The hardness of low cost spring brass of the present invention, Young's modulus, unit elongation are suitable with tin-phosphor bronze, and intensity is higher than the intensity of tin-phosphor bronze Y2 state.Carry out after product of the present invention is made connector plugging, the test such as one pole lift heavy, the parameter obtained all meets national standard.Meanwhile, reasonable offer flow process of the present invention simply, is easily processed, and is applicable to industrialization and produces.This spring brass performance is suitable with tin-phosphor bronze performance, and raw materials cost is only the 75%-80% of tin-phosphor bronze raw materials cost.
Embodiment
Below in conjunction with subordinate list embodiment, the invention will be further described.
Embodiment 1:
Starting material are by the Cu of 69.58% weight, and the Zn of 25.75% weight, the Al of 3.56% weight, the Ni of 0.59% weight, the Mn of 0.41% weight, surplus is the proportioning of inevitable impurity.Adopt the melting of 50Kg medium-frequency induction furnace, smelting temperature 1100-1250 DEG C, teeming temperature 1080-1150 DEG C.Swage is poured into a mould, and cast ingot dimension is that 60mm(is thick) × 120mm(is wide) × 450mm(is long).It is thick that ingot casting is of a size of 48mm(behind milling face) × 120mm(is wide) × 450mm(is long).Then according to hot rolling-roughing-annealing-in roll-anneal-prepared by pre-finish rolling-annealing-pickling-finish-rolling process.First ingot casting behind milling face heats 60-120 minute in walking-beam furnace, and temperature is 750-850 DEG C, then adopts the slab that φ 305 2 roller hot mill rolling becomes 3.5mm thick.Roughing and in roll and all adopt the rolling of φ 250 × 350 four-high mill, roughing, in roll rear slab thickness be respectively 2.0mm, 1.1mm.Application φ 80-φ 180 4-roller cold rolling mill carries out pre-finish rolling and the finish rolling of strip, and after pre-finish rolling and finish rolling, the thickness of slab is respectively 0.6mm, 0.5mm.The processing parameter of annealing in preparation process is: temperature 600-750 DEG C, soaking time 0.5-2 hour.
By aforesaid method process the thickness obtained be 0.5mm spring brass finished product after testing, its Young's modulus, unit elongation and tin-phosphor bronze are suitable, and tensile strength, specific conductivity are then higher than the respective performances of tin-phosphor bronze.Its performance comparison is as shown in the table.
The performance comparison table of spring brass and tin-phosphor bronze
| Sample | Tensile strength (Mpa) | Unit elongation (%) | Young's modulus (Gpa) | Specific conductivity (%IACS) | Remarks |
| Spring brass | 624.3 | 18.5 | 111.7 | 16.1 | |
| Tin-phosphor bronze | 467-528 | 24-38.5 | 113.4 | 10.6 | State Y2 |
After spring brass product makes connector, carry out performance of connector test, through aging, plug 5000 times after, its minimum withdrawal force one pole does not come off and is 3N, higher than national standard 1.5N.Brass alloys product of the present invention can substitute tin-phosphor bronze and apply in connector field.
Through performance of connector that is aging, that plug sample after 5000 times
Embodiment 2
Starting material are by the Cu of 71.52% weight, and the Zn of 23.89% weight, the Al of 3.37% weight, the Ni of 0.57% weight, the Mn of 0.53% weight, surplus is the proportioning of inevitable impurity.Adopt the melting of 50Kg medium-frequency induction furnace, smelting temperature 1100-1250 DEG C, teeming temperature 1080-1150 DEG C.Swage is poured into a mould, and cast ingot dimension is that 60mm(is thick) × 120mm(is wide) × 450mm(is long).It is thick that ingot casting is of a size of 48mm(behind milling face) × 120mm(is wide) × 450mm(is long).Then according to hot rolling-roughing-annealing-in roll-anneal-prepared by pre-finish rolling-annealing-pickling-finish-rolling process.First ingot casting behind milling face heats 60-120 minute in walking-beam furnace, and temperature is 750-850 DEG C, then adopts the slab that φ 305 2 roller hot mill rolling becomes 3.5mm thick.Roughing and in roll and all adopt the rolling of φ 250 × 350 four-high mill, roughing, in roll rear slab thickness be respectively 2.0mm, 1.1mm.Application φ 80-φ 180 4-roller cold rolling mill carries out pre-finish rolling and the finish rolling of strip, and after pre-finish rolling and finish rolling, the thickness of slab is respectively 0.6mm, 0.5mm.The processing parameter of annealing in preparation process is: temperature 600-750 DEG C, soaking time 0.5-2 hour.
By aforesaid method process the thickness obtained be 0.5mm spring brass finished product after testing, its Young's modulus, unit elongation and tin-phosphor bronze are suitable, and tensile strength, specific conductivity are then higher than the respective performances of tin-phosphor bronze.Its performance comparison is as shown in the table.
The performance comparison table of spring brass and tin-phosphor bronze
| Sample | Tensile strength (Mpa) | Unit elongation (%) | Young's modulus (Gpa) | Specific conductivity (%IACS) | Remarks |
| Spring brass | 618.3 | 22.7 | 112.7 | 15.8 | |
| Tin-phosphor bronze | 467-528 | 24-38.5 | 113.4 | 10.6 | State Y2 |
After spring brass product makes connector, carry out performance of connector test, through aging, plug 5000 times after, its minimum withdrawal force one pole does not come off and is 3N, higher than national standard 1.5N.Brass alloys product of the present invention can substitute tin-phosphor bronze and apply in connector field.
Through performance of connector that is aging, that plug sample after 5000 times
Embodiment 3
Starting material are by the Cu of 71.61% weight, and the Zn of 23.7% weight, the Al of 3.37% weight, the Ni of 0.53% weight, the Mn of 0.28% weight, surplus is the proportioning of inevitable impurity.Adopt the melting of 50Kg medium-frequency induction furnace, smelting temperature 1100-1250 DEG C, teeming temperature 1080-1150 DEG C.Swage is poured into a mould, and cast ingot dimension is that 60mm(is thick) × 120mm(is wide) × 450mm(is long).It is thick that ingot casting is of a size of 48mm(behind milling face) × 120mm(is wide) × 450mm(is long).Then according to hot rolling-roughing-annealing-in roll-anneal-prepared by pre-finish rolling-annealing-pickling-finish-rolling process.First ingot casting behind milling face heats 60-120 minute in walking-beam furnace, and temperature is 750-850 DEG C, then adopts the slab that φ 305 2 roller hot mill rolling becomes 3.5mm thick.Roughing and in roll and all adopt the rolling of φ 250 × 350 four-high mill, roughing, in roll rear slab thickness be respectively 2.0mm, 1.1mm.Application φ 80-φ 180 4-roller cold rolling mill carries out pre-finish rolling and the finish rolling of strip, and after pre-finish rolling and finish rolling, the thickness of slab is respectively 0.6mm, 0.5mm.The processing parameter of annealing in preparation process is: temperature 600-750 DEG C, soaking time 0.5-2 hour.
By aforesaid method process the thickness obtained be 0.5mm spring brass finished product after testing, its Young's modulus, unit elongation and tin-phosphor bronze are suitable, and tensile strength, specific conductivity are then higher than the respective performances of tin-phosphor bronze.Its performance comparison is as shown in the table.
The performance comparison table of spring brass and tin-phosphor bronze
| Sample | Tensile strength (Mpa) | Unit elongation (%) | Young's modulus (Gpa) | Specific conductivity (%IACS) | Remarks |
| Spring brass | 635.8 | 15.8 | 112 | 16.7 | |
| Tin-phosphor bronze | 467-528 | 24-38.5 | 113.4 | 10.6 | State Y2 |
After spring brass product makes connector, carry out performance of connector test, through aging, plug 5000 times after, its minimum withdrawal force one pole does not come off and is 3N, higher than national standard 1.5N.Brass alloys product of the present invention can substitute tin-phosphor bronze and apply in connector field.
Through performance of connector that is aging, that plug sample after 5000 times
Embodiment 4
Starting material are by the Cu of 71.82% weight, and the Zn of 23.93% weight, the Al of 3.49% weight, the Ni of 0.54% weight, the Mn of 0.12% weight, surplus is the proportioning of inevitable impurity.Adopt the melting of 50Kg medium-frequency induction furnace, smelting temperature 1100-1250 DEG C, teeming temperature 1080-1150 DEG C.Swage is poured into a mould, and cast ingot dimension is that 60mm(is thick) × 120mm(is wide) × 450mm(is long).It is thick that ingot casting is of a size of 48mm(behind milling face) × 120mm(is wide) × 450mm(is long).Then according to hot rolling-roughing-annealing-in roll-anneal-prepared by pre-finish rolling-annealing-pickling-finish-rolling process.First ingot casting behind milling face heats 60-120 minute in walking-beam furnace, and temperature is 750-850 DEG C, then adopts the slab that φ 305 2 roller hot mill rolling becomes 3.5mm thick.Roughing and in roll and all adopt the rolling of φ 250 × 350 four-high mill, roughing, in roll rear slab thickness be respectively 2.0mm, 1.1mm.Application φ 80-φ 180 4-roller cold rolling mill carries out pre-finish rolling and the finish rolling of strip, and after pre-finish rolling and finish rolling, the thickness of slab is respectively 0.6mm, 0.5mm.The processing parameter of annealing in preparation process is: temperature 600-750 DEG C, soaking time 0.5-2 hour.
By aforesaid method process the thickness obtained be 0.5mm spring brass finished product after testing, its Young's modulus, unit elongation and tin-phosphor bronze are suitable, and tensile strength, specific conductivity are then higher than the respective performances of tin-phosphor bronze.Its performance comparison is as shown in the table.
The performance comparison table of spring brass and tin-phosphor bronze
| Sample | Tensile strength (Mpa) | Unit elongation (%) | Young's modulus (Gpa) | Specific conductivity (%IACS) | Remarks |
| Spring brass | 679.2 | 17.5 | 110.1 | 17.5 | |
| Tin-phosphor bronze | 467-528 | 24-38.5 | 113.4 | 10.6 | State Y2 |
After spring brass product makes connector, carry out performance of connector test, through aging, plug 5000 times after, its minimum withdrawal force one pole does not come off and is 3N, higher than national standard 1.5N.Brass alloys product of the present invention can substitute tin-phosphor bronze and apply in connector field.
Through performance of connector that is aging, that plug sample after 5000 times
In sum, tensile strength, the Young's modulus of spring brass alloy of the present invention reach more than 618MPa, more than 110Gpa, excellent performance respectively.The performance of spring brass alloy of the present invention and tin-phosphor bronze compared, unit elongation, Young's modulus and tin-phosphor bronze are suitable, and tensile strength, specific conductivity are higher than the respective performances of tin-phosphor bronze, and complete alternative tin-phosphor bronze is applied in connector field.
Above embodiment is further illustrating and explaining this patent, instead of limitation of the present invention, and in spirit of the present invention and right protection scope, any amendment made, all falls into protection scope of the present invention.
Claims (3)
1. a low-cost elastic brass alloy, it is characterized in that copper is 69.58% weight, zinc is 25.75% weight, and aluminium is 3.56% weight, and nickel is 0.59% weight, and manganese is 0.41% weight, and surplus is inevitable impurity.
2. a low-cost elastic brass alloy, it is characterized in that copper is 71.61% weight, zinc is 23.7% weight, and aluminium is 3.37% weight, and nickel is 0.53% weight, and manganese is 0.28% weight, and surplus is inevitable impurity.
3. a low-cost elastic brass alloy, it is characterized in that copper is 71.82% weight, zinc is 23.93% weight, and aluminium is 3.49% weight, and nickel is 0.54% weight, and manganese is 0.12% weight, and surplus is inevitable impurity.
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| TWI395199B (en) * | 2010-08-30 | 2013-05-01 | Usun Technology Co Ltd | Method for manufacturing sounding element |
| CN103031466B (en) * | 2013-01-10 | 2015-04-15 | 宁波博威合金材料股份有限公司 | Tin-brass alloy and manufacturing method thereof |
| CN103131894B (en) * | 2013-03-15 | 2015-06-03 | 宁波金田铜业(集团)股份有限公司 | High-elasticity and high-conductivity copper alloy and production method thereof |
| CN109825739A (en) * | 2019-03-29 | 2019-05-31 | 安徽众源新材料股份有限公司 | A kind of fuse cap copper alloy and production technology |
| CN110669959A (en) * | 2019-10-25 | 2020-01-10 | 宁夏中色新材料有限公司 | Elastic bronze alloy and preparation method thereof |
| CN113695388B (en) * | 2021-08-31 | 2023-08-08 | 山西春雷铜材有限责任公司 | Production method of copper-manganese-nickel hot rolled coil |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101454468A (en) * | 2006-05-29 | 2009-06-10 | 日矿金属株式会社 | Cu-zn alloy strip excellent in thermal separation resistance for sn plating and sn-plated strip thereof |
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| JP2545842B2 (en) * | 1987-03-25 | 1996-10-23 | 三菱マテリアル株式会社 | Synchronous ring for transmission made of Cu alloy |
| CN101050494B (en) * | 2007-05-16 | 2010-05-19 | 赵景财 | Material of spring brass alloy, and production method |
| CN101215654B (en) * | 2008-01-04 | 2010-10-06 | 宁波博威合金材料股份有限公司 | High-strength brass alloy |
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| CN101454468A (en) * | 2006-05-29 | 2009-06-10 | 日矿金属株式会社 | Cu-zn alloy strip excellent in thermal separation resistance for sn plating and sn-plated strip thereof |
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