CN111534728A - Ultra-light aluminum alloy section for producing high-strength bolt and nut and preparation method thereof - Google Patents
Ultra-light aluminum alloy section for producing high-strength bolt and nut and preparation method thereof Download PDFInfo
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- CN111534728A CN111534728A CN202010422291.9A CN202010422291A CN111534728A CN 111534728 A CN111534728 A CN 111534728A CN 202010422291 A CN202010422291 A CN 202010422291A CN 111534728 A CN111534728 A CN 111534728A
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- aluminum
- aluminum alloy
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C21/00—Alloys based on aluminium
- C22C21/06—Alloys based on aluminium with magnesium as the next major constituent
- C22C21/08—Alloys based on aluminium with magnesium as the next major constituent with silicon
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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
- C22C1/026—Alloys based on aluminium
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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
- C22C1/03—Making non-ferrous alloys by melting using master alloys
-
- 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
- C22C1/06—Making non-ferrous alloys with the use of special agents for refining or deoxidising
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/002—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working by rapid cooling or quenching; cooling agents used therefor
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/04—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon
- C22F1/047—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon of alloys with magnesium as the next major constituent
Abstract
The invention relates to an ultra-light aluminum alloy section bar for producing high-strength bolts and nuts and a preparation method thereof, wherein the alloy comprises the following chemical components in percentage by mass: 0.60 to 0.75% of Si, 0.15 to 0.20% of Fe, 0.05 to 0.10% of Cu, 0.10 to 0.15% of Mn, 0.80 to 0.95% of Mg, 0.08 to 0.10% of Cr, 0.05 to 0.07% of B, 0.01 to 0.02% of Mo, 0.05 to 0.08% of Zn, 0.05 to 0.07% of Ti, and the balance of Al and inevitable impurities. The invention optimizes the contents of Si and Mg. And elements such as B, Ti, Cr, Mo, Mn and the like are added to perform mutual synergistic action, so that the mechanical property of the aluminum alloy is remarkably improved, and the aluminum alloy has higher strength and heat resistance during machining, and completely meets the performance requirements of high-pressure-resistant bolt and nut materials.
Description
Technical Field
The invention belongs to the technical field of new aluminum alloy materials, and particularly relates to an ultra-light aluminum alloy section for producing high-strength bolts and nuts and a preparation method thereof.
Background
The aluminium alloy is a light material, and by improving the alloy proportion and the production method, the mechanical property of the aluminium alloy is close to or exceeds that of high-quality steel, the aluminium alloy has good plasticity and easy processing, can be made into various shapes of section bars, and has excellent mechanical property and physical property. The aluminum alloy section is widely applied to structural materials of ships, aerospace devices, transportation, mechanical manufacturing, building decoration, chemical industry, electronic products and the like. In recent years, the requirements for the mechanical properties and physical properties of high-strength and high-pressure-resistant bolts and nuts are increasing, and therefore, the development of a high-strength bolt and nut ultra-light aluminum alloy section is urgently needed to meet the requirements of aluminum alloy bolt and nut materials.
Disclosure of Invention
The invention aims to provide an ultra-light aluminum alloy section for producing high-strength bolts and nuts and a preparation method thereof, which can improve the machining performance of materials while ensuring the high strength and mechanical properties of aluminum alloy.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
an ultra-light aluminum alloy section for producing high-strength bolts and nuts comprises the following raw materials in percentage by mass: 0.60 to 0.75% of Si, 0.15 to 0.20% of Fe, 0.05 to 0.10% of Cu, 0.10 to 0.15% of Mn, 0.80 to 0.95% of Mg, 0.08 to 0.10% of Cr, 0.05 to 0.07% of B, 0.01 to 0.02% of Mo, 0.05 to 0.08% of Zn, 0.05 to 0.07% of Ti0.05 to 0.07% of Ti, and the balance of Al and inevitable impurities.
Further, the mass percentage of the inevitable impurity elements is not more than 0.1%.
The other purpose of the invention is realized by the following technical scheme: the preparation method of the aluminum alloy profile comprises the following steps:
(1) weighing furnace charge according to the proportion of the alloy formula, adding an aluminum ingot into a melting furnace for heating and melting, when the temperature of the molten liquid reaches 725-745 ℃, sequentially adding an aluminum-silicon intermediate alloy, an aluminum-copper intermediate alloy, an aluminum-manganese intermediate alloy, an aluminum-magnesium intermediate alloy, an aluminum-chromium intermediate alloy, an aluminum-molybdenum intermediate alloy, an aluminum-zinc intermediate alloy and an aluminum-titanium intermediate alloy, stirring uniformly, continuing to heat to 750-765 ℃, stirring for 20-30min after the furnace charge is completely melted, then slagging off, adjusting the temperature to 740-750 ℃, blowing a refining agent to the surface of the molten liquid by a nitrogen pipe through nitrogen to refine, wherein the dosage of the refining agent is 1.6-2.0% of the weight of the molten liquid, slagging off after refining for 18-25min, standing for 12-18min, adjusting the temperature to 715-735 ℃, stirring for 8-12min, sampling and analyzing, heating to 725-740 ℃, the aluminum alloy cast rod can be discharged and poured, the aluminum titanium boron wire is adopted for on-line wire feeding and thinning, the wire feeding speed is 1.8 to 2KG for each ton of aluminum water, the aluminum alloy cast rod is obtained, and the aluminum alloy cast rod is cooled to be below 150 ℃;
(2) homogenizing the aluminum alloy cast rod obtained in the step (1), and carrying out homogenization treatment and heat preservation in a homogenizing furnace at 470-490 ℃ for 7-10 h;
(3) extruding and molding the homogenized aluminum alloy cast rod, heating an extrusion die to 480-490 ℃, the extrusion temperature is 495-520 ℃, the extrusion speed is 20-28m/min, and then cooling and quenching the extruded section bar by adopting online strong water mist to obtain an aluminum alloy section bar;
(4) straightening and stretching the cooled aluminum alloy section, and performing cold stretching compression deformation under the tension of 200-350 tons of a stretcher, wherein the longitudinal stretching deformation amount is 2-2.6%;
(5) carrying out secondary aging treatment on the stretched aluminum alloy profile: firstly preserving heat for 4-5h at the temperature of 130-.
The invention has the beneficial effects that:
the invention optimizes the contents of silicon and magnesium. And elements such as boron, titanium, chromium, molybdenum, manganese and the like are added, and the elements have mutual synergistic effect, so that the mechanical property of the aluminum alloy is obviously improved, and the high-pressure-resistant bolt and nut material has higher strength and heat resistance when the aluminum alloy section is stretched and machined, and completely meets the performance requirements of high-pressure-resistant bolt and nut materials.
Detailed Description
The present invention will be further described with reference to the following examples for facilitating understanding of those skilled in the art, and the description of the embodiments is not intended to limit the present invention.
The utility model provides a be used for producing bolt and nut ultra-light aluminum alloy section bar of high strength, this aluminum alloy section bar includes the component of following weight percent: 0.60 to 0.75% of Si, 0.15 to 0.20% of Fe, 0.05 to 0.10% of Cu, 0.10 to 0.15% of Mn, 0.80 to 0.95% of Mg, 0.08 to 0.10% of Cr, 0.05 to 0.07% of B, 0.01 to 0.02% of Mo, 0.05 to 0.08% of Zn0.05 to 0.07% of Ti, and the balance of A1. The preparation method of the aluminum alloy profile comprises the following steps:
(1) weighing furnace charge according to the proportion of the alloy formula, adding an aluminum ingot into a melting furnace for heating and melting, when the temperature of the molten liquid reaches 725-745 ℃, sequentially adding an aluminum-silicon intermediate alloy, an aluminum-copper intermediate alloy, an aluminum-manganese intermediate alloy, an aluminum-magnesium intermediate alloy, an aluminum-chromium intermediate alloy, an aluminum-molybdenum intermediate alloy, an aluminum-zinc intermediate alloy and an aluminum-titanium intermediate alloy, stirring uniformly, continuing to heat to 750-765 ℃, stirring for 20-30min after the furnace charge is completely melted, then slagging off, adjusting the temperature to 740-750 ℃, blowing a refining agent to the surface of the molten liquid by a nitrogen pipe through nitrogen to refine, wherein the dosage of the refining agent is 1.6-2.0% of the weight of the molten liquid, slagging off after refining for 18-25min, standing for 12-18min, adjusting the temperature to 715-735 ℃, stirring for 8-12min, sampling and analyzing, heating to 725-740 ℃, and (3) discharging and pouring, adopting aluminum-titanium-boron wires to feed wires and refine on line, feeding wires at the speed of 1.8-2KG aluminum-titanium-boron wires per ton of aluminum water to obtain aluminum alloy cast rods, and cooling to below 150 ℃.
(2) Homogenizing the aluminum alloy cast rod obtained in the step (1), and carrying out homogenization treatment and heat preservation for 7-10h in a homogenizing furnace at 470-490 ℃.
(3) And (3) extruding and molding the homogenized aluminum alloy cast rod, heating an extrusion die to 480-490 ℃, the extrusion temperature is 495-520 ℃, the extrusion speed is 20-28m/min, and then cooling and quenching the extruded section by adopting online strong water mist to obtain the aluminum alloy section.
(4) And straightening and stretching the cooled aluminum alloy section, and performing cold stretching compression deformation under the tension of 200-350 tons of a stretcher, wherein the longitudinal stretching deformation is 2-2.6%.
(5) Carrying out secondary aging treatment on the stretched aluminum alloy profile: firstly preserving heat for 4-5h at the temperature of 130-.
The main properties of the obtained aluminum alloy section are as follows through inspection: the tensile strength is 407MPa, the yield strength is 296MPa, the elongation is 9.8 percent, the machining performance is very good, and burrs and cracks at the top of the thread are eliminated.
The invention optimizes the contents of silicon and magnesium. And elements such as boron, titanium, chromium, molybdenum, manganese and the like are added, and the elements have mutual synergistic effect, so that the mechanical property of the aluminum alloy is obviously improved, and the high-pressure-resistant bolt and nut material has higher strength and heat resistance when the aluminum alloy section is stretched and machined, and completely meets the performance requirements of high-pressure-resistant bolt and nut materials.
Claims (3)
1. The ultra-light aluminum alloy section for producing the high-strength bolt and nut is characterized by comprising the following components in percentage by weight: 0.60 to 0.75% of Si, 0.15 to 0.20% of Fe, 0.05 to 0.10% of Cu, 0.10 to 0.15% of Mn, 0.80 to 0.95% of Mg, 0.08 to 0.10% of Cr, 0.05 to 0.07% of B, 0.01 to 0.02% of Mo, 0.05 to 0.08% of Zn0.05 to 0.07% of Ti, and the balance of Al and inevitable impurities.
2. The ultra-light aluminum alloy profile for high-strength bolts and nuts as claimed in claim 1, wherein the mass percentage of the inevitable impurity elements is not more than 0.1%.
3. Method for the production of an aluminium alloy profile according to any one of claims 1 to 2, comprising the steps of:
(1) weighing furnace charge according to the proportion of the alloy formula, adding an aluminum ingot into a melting furnace for heating and melting, when the temperature of the molten liquid reaches 725-745 ℃, sequentially adding an aluminum-silicon intermediate alloy, an aluminum-copper intermediate alloy, an aluminum-manganese intermediate alloy, an aluminum-magnesium intermediate alloy, an aluminum-chromium intermediate alloy, an aluminum-molybdenum intermediate alloy, an aluminum-zinc intermediate alloy and an aluminum-titanium intermediate alloy, stirring uniformly, continuing to heat to 750-765 ℃, stirring for 20-30min after the furnace charge is completely melted, then slagging off, adjusting the temperature to 740-750 ℃, blowing a refining agent to the surface of the molten liquid by a nitrogen pipe through nitrogen to refine, wherein the dosage of the refining agent is 1.6-2.0% of the weight of the molten liquid, slagging off after refining for 18-25min, standing for 12-18min, adjusting the temperature to 715-735 ℃, stirring for 8-12min, sampling and analyzing, heating to 725-740 ℃, the aluminum alloy cast rod can be discharged and poured, the aluminum titanium boron wire is adopted for on-line wire feeding and thinning, the wire feeding speed is 1.8 to 2KG for each ton of aluminum water, the aluminum alloy cast rod is obtained, and the aluminum alloy cast rod is cooled to be below 150 ℃;
(2) homogenizing the aluminum alloy cast rod obtained in the step (1), and carrying out homogenization treatment and heat preservation in a homogenizing furnace at 470-490 ℃ for 7-10 h;
(3) extruding and molding the homogenized aluminum alloy cast rod, heating an extrusion die to 480-490 ℃, the extrusion temperature is 495-520 ℃, the extrusion speed is 20-28m/min, and then cooling and quenching the extruded section by adopting online strong water mist to obtain an aluminum alloy section;
(4) straightening and stretching the cooled aluminum alloy section, and performing cold stretching compression deformation under the tension of 200-350 tons of a stretcher, wherein the longitudinal stretching deformation amount is 2-2.6%;
(5) carrying out secondary aging treatment on the stretched aluminum alloy profile: firstly preserving heat for 4-5h at the temperature of 130-.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010422291.9A CN111534728A (en) | 2020-05-19 | 2020-05-19 | Ultra-light aluminum alloy section for producing high-strength bolt and nut and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010422291.9A CN111534728A (en) | 2020-05-19 | 2020-05-19 | Ultra-light aluminum alloy section for producing high-strength bolt and nut and preparation method thereof |
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| CN111534728A true CN111534728A (en) | 2020-08-14 |
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| CN202010422291.9A Pending CN111534728A (en) | 2020-05-19 | 2020-05-19 | Ultra-light aluminum alloy section for producing high-strength bolt and nut and preparation method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115323226A (en) * | 2022-10-14 | 2022-11-11 | 山东裕航特种合金装备有限公司 | Fastener for ship and preparation method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20090045983A (en) * | 2007-11-05 | 2009-05-11 | 주식회사동양강철 | Al-alloy for hot air forming |
| CN105821262A (en) * | 2016-03-28 | 2016-08-03 | 中国铁道科学研究院铁道建筑研究所 | Sliding alloy material and alloy sliding structural component special for support and manufacturing method of alloy sliding structural component |
| CN107488799A (en) * | 2017-08-14 | 2017-12-19 | 山东南山铝业股份有限公司 | A kind of automobile connecting plate aluminium alloy extrusions and its manufacture method |
| CN110055442A (en) * | 2019-04-16 | 2019-07-26 | 吴江市新申铝业科技发展有限公司 | It is a kind of for producing the aluminium alloy extrusions and preparation method thereof of the full aluminium vehicle frame of High-strength ultralight |
-
2020
- 2020-05-19 CN CN202010422291.9A patent/CN111534728A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20090045983A (en) * | 2007-11-05 | 2009-05-11 | 주식회사동양강철 | Al-alloy for hot air forming |
| CN105821262A (en) * | 2016-03-28 | 2016-08-03 | 中国铁道科学研究院铁道建筑研究所 | Sliding alloy material and alloy sliding structural component special for support and manufacturing method of alloy sliding structural component |
| CN107488799A (en) * | 2017-08-14 | 2017-12-19 | 山东南山铝业股份有限公司 | A kind of automobile connecting plate aluminium alloy extrusions and its manufacture method |
| CN110055442A (en) * | 2019-04-16 | 2019-07-26 | 吴江市新申铝业科技发展有限公司 | It is a kind of for producing the aluminium alloy extrusions and preparation method thereof of the full aluminium vehicle frame of High-strength ultralight |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115323226A (en) * | 2022-10-14 | 2022-11-11 | 山东裕航特种合金装备有限公司 | Fastener for ship and preparation method thereof |
| CN115323226B (en) * | 2022-10-14 | 2023-01-24 | 山东裕航特种合金装备有限公司 | Fastener for ship and preparation method thereof |
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Application publication date: 20200814 |
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