CN110629068A - Zirconium microalloyed multi-element complex cast aluminum bronze alloy - Google Patents
Zirconium microalloyed multi-element complex cast aluminum bronze alloy Download PDFInfo
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- CN110629068A CN110629068A CN201810657003.0A CN201810657003A CN110629068A CN 110629068 A CN110629068 A CN 110629068A CN 201810657003 A CN201810657003 A CN 201810657003A CN 110629068 A CN110629068 A CN 110629068A
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/02—Making non-ferrous alloys by melting
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C9/00—Alloys based on copper
- C22C9/05—Alloys based on copper with manganese as the next major constituent
Abstract
The invention discloses a zirconium microalloyed multi-element complex cast aluminum bronze alloy, which comprises the following components in percentage by mass: al: 7.5-8.5%, Fe: 3.0-4.0%, Ni: 2.0-2.5%, Mn: 11.0-13.0%, Zr: 0.05-0.5% and the balance of Cu. The zirconium microalloyed complex casting aluminum bronze alloy of the invention takes an aluminum bronze alloy system as a matrix, and the zirconium microalloyed aluminum bronze alloy with high performance is obtained by greatly refining grains through zirconium microalloying, so that the strength and hardness of the alloy can be obviously improved.
Description
Technical Field
The invention discloses a zirconium microalloyed multi-element complex cast aluminum bronze alloy, belonging to the technical field of non-ferrous metal preparation.
Background
Copper alloy materials are widely used in various industries due to excellent electrical conductivity, thermal conductivity and corrosion resistance, good processing and forming properties and the like, but among numerous metal materials, copper alloys still belong to materials with low strength and low hardness.
In various series of copper alloys, the aluminum bronze alloy keeps excellent electric and heat conducting performance and excellent plasticity, and has higher strength and excellent wear resistance and corrosion resistance. At present, the tensile strength sigma of the aluminum bronze alloy ZCuAl8Mn13Fe3Ni2 at room temperatureb670MPa, room temperature yield strength sigmas310MPa, elongation delta 5 (%) > 18 and hardness 167 HB.
Aluminum bronze alloys have been used in many fields, for example, aluminum bronze alloys are used for manufacturing automobile synchronizer rings, the worldwide production amount per year is more than 6000 tons, the worldwide market demand per year for synchronizer rings is more than 10000 tons, but at present, most of synchronizer rings produced in China are manufactured by complex brass alloys, and the complex brass alloys can be compared with aluminum bronze alloys in strength and hardness, but are easy to generate thermal cracking segregation and the like. The aluminum bronze alloy is also commonly used for manufacturing a nut for a rolling mill, the nut has very large loss caused by poor mechanical properties in the using process, and the loss of many steel companies in China exceeds millions of yuan each year because of low strength and low hardness of the nut.
Therefore, the problem of the aluminum bronze alloy is how to further improve the mechanical properties such as strength and hardness. The method for improving the strength and the hardness of the alloy mainly comprises methods such as strain strengthening, solid solution strengthening, dispersion strengthening and the like, wherein the common method in the current production is the strain strengthening, but the strain strengthening limits the application of the aluminum bronze alloy in certain fields.
Disclosure of Invention
In order to solve the problems of low strength and low hardness of aluminum bronze, the invention aims to provide a zirconium microalloyed multi-element complex cast aluminum bronze alloy.
The technical scheme adopted by the invention is as follows:
a zirconium microalloyed multi-element complex cast aluminum bronze alloy comprises the following components in percentage by mass: 7.5 to 8.5 percent of Al, 3.0 to 4.0 percent of Fe, 2.0 to 2.5 percent of Ni, 11.0 to 13.0 percent of Mn, 0.05 to 0.5 percent of Zr and the balance of Cu.
The invention provides a preparation method of a zirconium microalloyed multi-element complex cast aluminum bronze alloy copper bar, which comprises the following steps:
(1) firstly, cleaning a furnace body of an induction smelting furnace to prevent impurities from polluting a sample;
(2) accurately weighing each metal simple substance according to the components, uniformly mixing, putting into a crucible, putting the crucible into an induction smelting furnace, starting an induction smelting power supply to heat the alloy, keeping the temperature for 10min after reaching the melting point of 200K, and pouring into a low-carbon steel bar mold with the inner diameter of phi 20mm after uniform melting to obtain an alloy bar with the diameter of phi 20 mm.
Compared with the prior art, the invention has the following remarkable advantages: 1. the strength and hardness of the alloy after microalloying are greatly improved. ZCuAl8Mn13Fe3Ni2 room temperature tensile strength sigmab670MPa, room temperature yield strength sigmas310MPa, elongation delta 5 (%) > 18 and hardness 167 HB. 2. The invention adds Zr to microalloy the alloy to obtain the sigmabCan reach 860MPa, which is 190MPa higher than that of original system; sigmasCan reach 380MPa, which is increased by 70MPa compared with the original system; elongation δ 5 (%) ═ 15; the hardness of the alloy after microalloying can reach 250HB, which is 73HB higher than that of the original system.
Drawings
FIG. 1 is a microstructure diagram of an alloy ingot of a comparative example.
FIG. 2 is a microstructure diagram of an alloy ingot of example 1.
FIG. 3 is a microstructure diagram of an alloy ingot of example 5.
Detailed Description
The invention will be further explained with reference to the drawings and the embodiments
Example 1
A microalloyed copper alloy comprises the following chemical components in percentage by mass: 8.0 percent of Al, 3.5 percent of Fe, 2.3 percent of Ni, 12.0 percent of Mn, 0.5 percent of Zr and the balance of Cu.
Firstly, cleaning a smelting furnace body, weighing each metal simple substance according to a target component alloy, uniformly mixing, putting into a crucible, putting the crucible into an induction smelting furnace, starting an induction smelting power supply to heat the alloy, keeping the temperature for 10min after reaching the melting point of more than 200K, uniformly melting, and then pouring into a low-carbon steel bar mold with the inner diameter of phi 20mm to obtain an alloy bar with the diameter of phi 20 mm.
As shown in FIG. 2, when the microstructure of the alloy ingot was observed, the grain size of the alloy ingot obtained at this ratio was 3.3 μm, which was reduced by 9.1 μm as compared with the grain size of the alloy of comparative example.
With the increase of the added amount of Zr, the grain refinement becomes more obvious, the lath-shaped grains are changed into slender needle-shaped grains, and the grains obtained near the grain boundary are the smallest.
And performing Brinell hardness test on the alloy ingot according to the national standard to obtain the Brinell hardness of 250 HB.
According to the national standard of tensile test, the alloy ingot is made into tensile test samples meeting the national standard and is subjected to tensile property test to obtain the tensile strength sigmab860MPa, yield strength sigmas380MPa, elongation delta 5 (%) -15.
Example 2
A microalloyed copper alloy comprises the following chemical components in percentage by mass: 8.0 percent of Al, 3.5 percent of Fe, 2.3 percent of Ni, 12.0 percent of Mn, 0.3 percent of Zr and the balance of Cu.
Firstly, cleaning a smelting furnace body, weighing each metal simple substance according to a target component alloy, uniformly mixing, putting into a crucible, putting the crucible into an induction smelting furnace, starting an induction smelting power supply to heat the alloy, keeping the temperature for 10min after reaching the melting point of more than 200K, uniformly melting, and then pouring into a low-carbon steel bar mold with the inner diameter of phi 20mm to obtain an alloy bar with the diameter of phi 20 mm.
The microstructure of the alloy ingot is observed, and the grain size of the alloy ingot obtained under the mixture ratio is 3.5 mu m, and is reduced by 8.9 mu m compared with the grain size of the alloy of a comparative example.
And performing Brinell hardness test on the alloy ingot according to the national standard to obtain the Brinell hardness of 239 HB.
According to the national standard of tensile test, the alloy ingot is made into tensile test samples meeting the national standard and is subjected to tensile property test to obtain the tensile strength sigmab849MPa, yield strength sigmas371MPa, elongation δ 5 (%) -15.
Example 3
A microalloyed copper alloy comprises the following chemical components in percentage by mass: 8.0 percent of Al, 3.5 percent of Fe, 2.3 percent of Ni, 12.0 percent of Mn, 0.2 percent of Zr and the balance of Cu.
Firstly, cleaning a smelting furnace body, weighing each metal simple substance according to a target component alloy, uniformly mixing, putting into a crucible, putting the crucible into an induction smelting furnace, starting an induction smelting power supply to heat the alloy, keeping the temperature for 10min after reaching the melting point of more than 200K, uniformly melting, and then pouring into a low-carbon steel bar mold with the inner diameter of phi 20mm to obtain an alloy bar with the diameter of phi 20 mm.
The microstructure of the alloy ingot is observed, and the grain size of the alloy ingot obtained under the mixture ratio is 4.2 μm and is reduced by 8.3 μm compared with the grain size of the alloy of a comparative example.
And (4) carrying out Brinell hardness test on the alloy ingot according to the national standard to obtain the Brinell hardness of 221 HB.
According to the national standard of tensile test, the alloy ingot is made into tensile test samples meeting the national standard and is subjected to tensile property test to obtain the tensile strength sigmab818MPa, yield strength sigma 359MPa, elongation delta 5 (%) -16.
Example 4
A microalloyed copper alloy comprises the following chemical components in percentage by mass: 8.0 percent of Al, 3.5 percent of Fe, 2.3 percent of Ni, 12.0 percent of Mn, 0.1 percent of Zr and the balance of Cu.
Firstly, cleaning a smelting furnace body, weighing each metal simple substance according to a target component alloy, uniformly mixing, putting into a crucible, putting the crucible into an induction smelting furnace, starting an induction smelting power supply to heat the alloy, keeping the temperature for 10min after reaching the melting point of more than 200K, uniformly melting, and then pouring into a low-carbon steel bar mold with the inner diameter of phi 20mm to obtain an alloy bar with the diameter of phi 20 mm.
The microstructure of the alloy ingot is observed, and the grain size of the alloy ingot obtained under the mixture ratio is 6.2 mu m, and is reduced by 6.2 mu m compared with the grain size of the alloy of a comparative example.
And carrying out Brinell hardness test on the alloy ingot according to the national standard to obtain the Brinell hardness of 196 HB.
According to the national standard of tensile test, the alloy ingot is made into tensile test samples meeting the national standard and is subjected to tensile property test to obtain the tensile strength sigmab780MPa, yield strength sigmas346MPa, elongation delta 5 (%) -17.
Example 5
A microalloyed copper alloy comprises the following chemical components in percentage by mass: 8.0 percent of Al, 3.5 percent of Fe, 2.3 percent of Ni, 12.0 percent of Mn, 0.05 percent of Zr and the balance of Cu.
Firstly, cleaning a smelting furnace body, weighing each metal simple substance according to a target component alloy, uniformly mixing, putting into a crucible, putting the crucible into an induction smelting furnace, starting an induction smelting power supply to heat the alloy, keeping the temperature for 10min after reaching the melting point of more than 200K, uniformly melting, and then pouring into a low-carbon steel bar mold with the inner diameter of phi 20mm to obtain an alloy bar with the diameter of phi 20 mm.
As shown in FIG. 3, when the microstructure of the alloy ingot was observed, the grain size of the alloy ingot obtained at this ratio was 9.8 μm, which was reduced by 2.6 μm as compared with the grain size of the alloy of comparative example.
The addition of Zr causes the lath-shaped crystal grains to start to be crushed into slender small crystal grains, the crystal grains are obviously very fine in the Zr-enriched area, and the crystal grains crushed to half of the crystal grains can be observed in partial area.
And performing Brinell hardness test on the alloy ingot according to the national standard to obtain the Brinell hardness of 180 HB.
According to the national standard of tensile test, the alloy ingot is made into tensile test samples meeting the national standard and is subjected to tensile property test to obtain the tensile strength sigmab730MPa, yield strength sigmas320MPa, elongation δ 5 (%) -17.
The strength and hardness of the alloy after microalloying are greatly improved. ZCuAl8Mn13Fe3Ni2 room temperature tensile strength sigmab670MPa, room temperature yield strength sigmas310MPa, elongation delta 5 (%) > 18 and hardness 167 HB. The invention adds Zr to microalloy the alloy to obtain the sigmabCan reach 860MPa, which is 190MPa higher than that of original system; sigmasCan reach 380MPa, which is increased by 70MPa compared with the original system; elongation δ 5 (%) ═ 15; the hardness of the alloy after microalloying can reach 250HB, which is 73HB higher than that of the original system.
Comparative example
An aluminum bronze alloy comprises the following chemical components in percentage by mass: 8.0 percent of Al, 3.5 percent of Fe, 2.3 percent of Ni, 12.0 percent of Mn and 74.2 percent of Cu.
Firstly, cleaning a smelting furnace body, weighing each metal simple substance according to a target component alloy, uniformly mixing, putting into a crucible, putting the crucible into an induction smelting furnace, starting an induction smelting power supply to heat the alloy, keeping the temperature for 10min after reaching the melting point of more than 200K, uniformly melting, and then pouring into a low-carbon steel bar mold with the inner diameter of phi 20mm to obtain an alloy bar with the diameter of phi 20 mm.
As shown in FIG. 1, the microstructure of the alloy ingot was observed, and the grain size of the alloy ingot was 12.4 μm at this ratio.
And performing Brinell hardness test on the alloy ingot according to the national standard to obtain the Brinell hardness of 168 HB.
According to the national standard of tensile test, the alloy ingot is made into tensile test samples meeting the national standard and is subjected to tensile property test to obtain the tensile strength sigmab674MPa, yield strength sigmas313MPa, elongation δ 5 (%) -18.
Claims (9)
1. The zirconium microalloyed multi-element complex cast aluminum bronze alloy is characterized by comprising the following components in percentage by mass: 7.5-8.5% of Al, 3.0-4.0% of Fe, 2.0-2.5% of Ni, 11.0-13.0% of Mn, 0.05-0.5% of Zr, and the balance of Cu and impurities difficult to remove, wherein the impurity content is less than or equal to 0.03%.
2. The zirconium microalloyed multi-element complex cast aluminum bronze alloy according to claim 1, wherein the aluminum bronze alloy comprises, in mass percent: 8.0 percent of Al, 3.5 percent of Fe, 2.3 percent of Ni, 12.0 percent of Mn, 0.5 percent of Zr, and the balance of Cu and impurities which are difficult to remove, wherein the content of the impurities is less than or equal to 0.03 percent.
3. The zirconium microalloyed multi-element complex cast aluminum bronze alloy according to claim 1, wherein the aluminum bronze alloy comprises, in mass percent: 8.0 percent of Al, 3.5 percent of Fe, 2.3 percent of Ni, 12.0 percent of Mn, 0.3 percent of Zr, and the balance of Cu and impurities which are difficult to remove, wherein the content of the impurities is less than or equal to 0.03 percent.
4. The zirconium microalloyed multi-element complex cast aluminum bronze alloy according to claim 1, wherein the aluminum bronze alloy comprises, in mass percent: 8.0 percent of Al, 3.5 percent of Fe, 2.3 percent of Ni, 12.0 percent of Mn, 0.2 percent of Zr, and the balance of Cu and impurities which are difficult to remove, wherein the content of the impurities is less than or equal to 0.03 percent.
5. The zirconium microalloyed multi-element complex cast aluminum bronze alloy according to claim 1, wherein the aluminum bronze alloy comprises, in mass percent: 8.0 percent of Al, 3.5 percent of Fe, 2.3 percent of Ni, 12.0 percent of Mn, 0.1 percent of Zr, and the balance of Cu and impurities which are difficult to remove, wherein the content of the impurities is less than or equal to 0.03 percent.
6. The zirconium microalloyed multi-element complex cast aluminum bronze alloy according to claim 1, wherein the aluminum bronze alloy comprises, in mass percent: 8.0 percent of Al, 3.5 percent of Fe, 2.3 percent of Ni, 12.0 percent of Mn, 0.05 percent of Zr, and the balance of Cu and impurities which are difficult to remove, wherein the content of the impurities is less than or equal to 0.03 percent.
7. The zirconium microalloyed multi-element complex cast aluminum bronze alloy bar is characterized by comprising the following components in percentage by mass: 7.5-8.5% of Al, 3.0-4.0% of Fe, 2.0-2.5% of Ni, 11.0-13.0% of Mn, 0.05-0.5% of Zr, and the balance of Cu and impurity content difficult to remove less than or equal to 0.03%.
8. The preparation method of the zirconium microalloyed multi-element complex cast aluminum bronze alloy bar material based on the claim 7 is characterized by comprising the following preparation processes: weighing each metal simple substance according to the target component alloy, uniformly mixing, putting into a crucible, putting the crucible into an induction smelting furnace, starting an induction smelting power supply to heat the alloy to be more than a melting point of 200K, preserving the heat for 10min, uniformly melting, and pouring into a low-carbon steel bar mold to obtain the bronze alloy bar.
9. The method of making a zirconium microalloyed wrought cast aluminum bronze alloy bar according to claim 8, wherein the bronze alloy bar has a diameter of 20 mm.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113584343A (en) * | 2021-07-28 | 2021-11-02 | 宁波博威合金材料股份有限公司 | Corrosion-resistant high-manganese aluminum bronze alloy and preparation method thereof |
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| CN102899522A (en) * | 2012-10-26 | 2013-01-30 | 镇江金叶螺旋桨有限公司 | Zirconium micro-alloyed nickel-aluminum bronze and preparation method thereof |
| CN102925742A (en) * | 2012-10-26 | 2013-02-13 | 镇江金叶螺旋桨有限公司 | Scandium, zirconium and strontium (Sc-Zr-Sr) compounded micro-alloyed high manganic aluminum bronze and preparation method thereof |
| CN106399728A (en) * | 2016-11-28 | 2017-02-15 | 中国船舶重工集团公司第十二研究所 | Smelting method for high-manganese aluminum bronze alloy |
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- 2018-06-25 CN CN201810657003.0A patent/CN110629068A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102312179A (en) * | 2010-06-29 | 2012-01-11 | 天津市金龙焊接材料有限公司 | Thermal treatment process for high manganese aluminum bronze brazing alloy |
| CN102899522A (en) * | 2012-10-26 | 2013-01-30 | 镇江金叶螺旋桨有限公司 | Zirconium micro-alloyed nickel-aluminum bronze and preparation method thereof |
| CN102925742A (en) * | 2012-10-26 | 2013-02-13 | 镇江金叶螺旋桨有限公司 | Scandium, zirconium and strontium (Sc-Zr-Sr) compounded micro-alloyed high manganic aluminum bronze and preparation method thereof |
| CN106399728A (en) * | 2016-11-28 | 2017-02-15 | 中国船舶重工集团公司第十二研究所 | Smelting method for high-manganese aluminum bronze alloy |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113584343A (en) * | 2021-07-28 | 2021-11-02 | 宁波博威合金材料股份有限公司 | Corrosion-resistant high-manganese aluminum bronze alloy and preparation method thereof |
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Application publication date: 20191231 |