CN114150187A - Preparation process of aluminum-chromium alloy with high corrosion resistance and high strength - Google Patents
Preparation process of aluminum-chromium alloy with high corrosion resistance and high strength Download PDFInfo
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- CN114150187A CN114150187A CN202111482152.6A CN202111482152A CN114150187A CN 114150187 A CN114150187 A CN 114150187A CN 202111482152 A CN202111482152 A CN 202111482152A CN 114150187 A CN114150187 A CN 114150187A
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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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
- B22D17/007—Semi-solid pressure die casting
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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
- 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
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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
- C22F1/04—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
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Abstract
The invention discloses a preparation process of an aluminum-chromium alloy with high corrosion resistance and high strength, which relates to the field of aluminum alloy casting, and comprises main materials and auxiliary materials, wherein the main materials comprise 50-60 parts by weight of aluminum and 15-20 parts by weight of chromium; the auxiliary material comprises 8-14 parts by weight of manganese; 5-7 parts of zinc, 4-5 parts of nickel, 0.2-0.5 part of zirconium, 0.1-0.3 part of strontium, 0.3-0.6 part of yttrium and 0.1-0.4 part of erbium, and the synergistic effect of manganese, nickel, zinc, zirconium, strontium, yttrium and erbium elements is added in the casting process, so that the aluminum alloy structure can be deteriorated and refined, and thus the high-aluminum-chromium alloy with density is obtained.
Description
Technical Field
The invention relates to the field of aluminum alloy casting, in particular to a preparation process of an aluminum-chromium alloy with high corrosion resistance and high strength.
Background
The high-chromium aluminum alloy is an excellent wear-resistant, heat-resistant and corrosion-resistant light alloy material and has potential industrial application value.
The aluminum alloy is high in strength and good in forming quality, and is widely used in the industry, in the hot forming processing technology of the aluminum alloy, the aluminum alloy can be subjected to high-strength aluminum alloy after high-temperature hot pressing and cooling quenching, and in the process, the corrosion resistance of the aluminum alloy is generally poor, the surface or the inside of the aluminum alloy is easily corroded due to environmental factors such as acid rain and smoke, secondly, the brittleness of the traditional alloy is high, the overall performance of the aluminum alloy is influenced, and the practicability of the aluminum alloy is reduced.
Disclosure of Invention
The invention aims to: in order to solve the problems, the preparation process of the aluminum-chromium alloy with high corrosion resistance and high strength is provided.
In order to achieve the purpose, the invention provides the following technical scheme: the aluminum-chromium alloy with high corrosion resistance strength comprises main materials and auxiliary materials, wherein the main materials comprise 50-60 parts by weight of aluminum and 15-20 parts by weight of chromium; the auxiliary material comprises 8-14 parts by weight of manganese; 5 to 7 parts of zinc, 4 to 5 parts of nickel, 0.2 to 0.5 part of zirconium, 0.1 to 0.3 part of strontium, 0.3 to 0.6 part of yttrium and 0.1 to 0.4 part of erbium.
A preparation process of an aluminum-chromium alloy with high corrosion resistance strength comprises the following steps:
step 1: sieving the raw materials, wherein the granularity of the main material is 50-170 μm, the granularity of the auxiliary material is 75-150 μm, and the purity of all the raw materials is more than 99.5 wt%;
step 2: putting the main materials into a mixer in proportion, and stirring for 3-5h at the rotating speed of 30-50r/min to obtain a mixture A;
and step 3: adding the mixture A into a smelting furnace in batches for heating and melting to obtain molten metal B;
and 4, step 4: stirring the metal liquid B at the rotating speed of 200-;
and 5: adding auxiliary materials into the molten metal B to completely melt the auxiliary materials, stirring and standing to obtain a melt C;
step 6: molding and casting the melt C by a hot top casting machine when the melt C reaches a semi-solid state;
and 7: quenching the casting, wherein the quenching heating temperature is 530 ℃ and 610 ℃, the quenching transfer time is less than or equal to 22-30s, and the parking time after quenching is 3-5 h;
and 8: and after quenching, placing the casting in an aging furnace, and performing aging treatment to obtain the aluminum-chromium alloy.
Preferably, the stirring time in the step 4 is 10-20min, and the standing time is 5-15 min.
By adopting the technical scheme: so that the raw materials can be fully fused, and the quality of the aluminum alloy is improved.
Preferably, the casting pressure in the step 6 is 53-70MPa, the water pressure of the cooling water is controlled to be 0.05-0.1MPa, and the temperature of the aluminum alloy melt is kept at 730-.
By adopting the technical scheme: the normal operation of casting is ensured, the casting effort caused by too low temperature is avoided, and the casting is not easy to form due to too high temperature.
Preferably, the melting temperature in the step 1 is 800-950 ℃, and the melting temperature in the step 5 is 740-820 ℃.
By adopting the technical scheme: so that the raw materials can be melted rapidly, and the processing efficiency and effect are ensured.
Compared with the prior art, the invention has the beneficial effects that: in the invention, the synergistic effect of manganese, nickel, zinc, zirconium, strontium, yttrium and erbium elements is added in the casting process, so that the aluminum alloy structure can be modified and refined, and the dense high-aluminum-chromium alloy is obtained; the strontium added into the aluminum-chromium alloy can play a role in modification, can effectively refine eutectic silicon and primary crystal silicon in the alloy, and improves the mechanical property of the alloy; yttrium, zirconium, nickel and zinc are cooperatively matched to play a role in protecting the aluminum alloy, wherein the yttrium, zirconium and nickel can form a continuous and compact protective oxide film on the surface of the aluminum alloy, so that the diffusion and the immersion of oxygen and sulfur can be hindered, the corrosion resistance of the aluminum alloy can be improved, the zinc can refine grains of the aluminum alloy, the hardenability and the heat strength can be improved, the sufficient strength and the creep resistance can be kept at high temperature, and meanwhile, the corrosion resistance of the alloy can be greatly improved; the addition of erbium can obviously refine the as-cast crystal grains of the alloy, inhibit crystallization to a certain extent, improve the thermal stability of the alloy and simultaneously improve the tensile strength and hardness of the alloy in different heat treatment states; the addition of manganese is beneficial to corrosion resistance of the alloy on one hand, and can also effectively improve the alloy strength on the other hand, and the aluminum-chromium alloy has good performances of corrosion resistance, high strength, good toughness, heat conductivity and the like by increasing the proportion of each metal in the aluminum alloy, so that the practicability of the aluminum-chromium alloy is improved;
Detailed Description
Example 1:
the aluminum-chromium alloy with high corrosion resistance strength comprises a main material and an auxiliary material, wherein the main material comprises 50 parts by weight of aluminum and 15 parts by weight of chromium; the auxiliary material comprises 8 parts of manganese; 5 parts of zinc, 4 parts of nickel, 0.2 part of zirconium, 0.1 part of strontium, 0.3 part of yttrium and 0.1 part of erbium.
A preparation process of an aluminum-chromium alloy with high corrosion resistance strength comprises the following steps:
step 1: screening the raw materials, wherein the granularity of the main material is 50 mu m, the granularity of the auxiliary material is 75 mu m, and the purity of all the raw materials is more than 99.5 wt%;
step 2: putting the main materials into a mixer in proportion, and stirring for 5 hours at the rotating speed of 30r/min to obtain a mixture A;
and step 3: adding the mixture A into a smelting furnace in batches for heating and melting to obtain molten metal B;
and 4, step 4: stirring the molten metal B at the rotating speed of 200r/min, standing, and then performing degassing and deslagging by using hexachloroethane and a deslagging agent;
and 5: adding auxiliary materials into the molten metal B to completely melt the auxiliary materials, stirring and standing to obtain a melt C;
step 6: molding and casting the melt C by a hot top casting machine when the melt C reaches a semi-solid state;
and 7: quenching the casting, wherein the quenching heating temperature is 530 ℃, the quenching transfer time is less than or equal to 22s, and the standing time after quenching is 3 h;
and 8: and after quenching, placing the casting in an aging furnace, and performing aging treatment to obtain the aluminum-chromium alloy.
Preferably, the stirring time in the step 4 is 10min, and the standing time is 5 min.
By adopting the technical scheme: so that the raw materials can be fully fused, and the quality of the aluminum alloy is improved.
Preferably, the casting pressure in step 6 is 53MPa, the water pressure of cooling water is controlled to be 0.05MPa, and the temperature of the aluminum alloy melt is kept at 730 ℃.
By adopting the technical scheme: the normal operation of casting is ensured, the casting effort caused by too low temperature is avoided, and the casting is not easy to form due to too high temperature.
Preferably, the melting temperature in step 1 is 800 ℃ and the melting temperature in step 5 is 740 ℃.
By adopting the technical scheme: so that the raw materials can be melted rapidly, and the processing efficiency and effect are ensured.
The aluminum-chromium alloy finished product obtained by the method has the following main mechanical properties at room temperature: the tensile strength is 312MPa, the yield strength is 217MPa, and the elongation is 11.32 percent
Example 2:
the aluminum-chromium alloy with high corrosion resistance strength comprises main materials and auxiliary materials, wherein the main materials comprise 55 parts by weight of aluminum and 17.5 parts by weight of chromium; the auxiliary material comprises 11 parts by weight of manganese; 6 parts of zinc, 4.5 parts of nickel, 0.35 part of zirconium, 0.2 part of strontium, 0.45 part of yttrium and 0.25 part of erbium.
A preparation process of an aluminum-chromium alloy with high corrosion resistance strength comprises the following steps:
step 1: screening the raw materials, wherein the granularity of the main material is 110 mu m, the granularity of the auxiliary material is 120 mu m, and the purity of all the raw materials is more than 99.5 wt%;
step 2: putting the main materials into a mixer in proportion, and stirring at the rotating speed of 40r/min for 4 hours to obtain a mixture A;
and step 3: adding the mixture A into a smelting furnace in batches for heating and melting to obtain molten metal B;
and 4, step 4: stirring the molten metal B at the rotating speed of 300r/min, standing, and then performing degassing and deslagging by using hexachloroethane and a deslagging agent;
and 5: adding auxiliary materials into the molten metal B to completely melt the auxiliary materials, stirring and standing to obtain a melt C;
step 6: molding and casting the melt C by a hot top casting machine when the melt C reaches a semi-solid state;
and 7: quenching the casting, wherein the quenching heating temperature is 570 ℃, the quenching transfer time is less than or equal to 26s, and the standing time after quenching is 5 h;
and 8: and after quenching, placing the casting in an aging furnace, and performing aging treatment to obtain the aluminum-chromium alloy.
Preferably, the stirring time in the step 4 is 15min, and the standing time is 10 min.
By adopting the technical scheme: so that the raw materials can be fully fused, and the quality of the aluminum alloy is improved.
Preferably, the casting pressure in step 6 is 57MPa, the water pressure of cooling water is controlled at 0.08MPa, and the temperature of the aluminum alloy melt is kept at 735 ℃.
By adopting the technical scheme: the normal operation of casting is ensured, the casting effort caused by too low temperature is avoided, and the casting is not easy to form due to too high temperature.
Preferably, the melting temperature in step 1 is 900 ℃ and the melting temperature in step 5 is 780 ℃.
By adopting the technical scheme: so that the raw materials can be melted rapidly, and the processing efficiency and effect are ensured.
The aluminum-chromium alloy finished product obtained by the method has the following main mechanical properties at room temperature: the tensile strength was 341MPa, the yield strength was 243MPa, and the elongation was 13.46%.
Example 3:
the aluminum-chromium alloy with high corrosion resistance strength comprises a main material and an auxiliary material, wherein the main material comprises 60 parts by weight of aluminum and 20 parts by weight of chromium; the auxiliary material comprises 4 parts of manganese; 7 parts of zinc, 5 parts of nickel, 0.5 part of zirconium, 0.3 part of strontium, 0.6 part of yttrium and 0.4 part of erbium.
A preparation process of an aluminum-chromium alloy with high corrosion resistance strength comprises the following steps:
step 1: screening the raw materials, wherein the granularity of the main material is 170 mu m, the granularity of the auxiliary material is 150 mu m, and the purity of all the raw materials is more than 99.5 wt%;
step 2: putting the main materials into a mixer in proportion, and stirring for 3 hours at a rotating speed of 50r/min to obtain a mixture A;
and step 3: adding the mixture A into a smelting furnace in batches for heating and melting to obtain molten metal B;
and 4, step 4: stirring the molten metal B at the rotating speed of 400r/min, standing, and then performing degassing and deslagging by using hexachloroethane and a deslagging agent;
and 5: adding auxiliary materials into the molten metal B to completely melt the auxiliary materials, stirring and standing to obtain a melt C;
step 6: molding and casting the melt C by a hot top casting machine when the melt C reaches a semi-solid state;
and 7: quenching the casting, wherein the quenching heating temperature is 610 ℃, the quenching transfer time is less than or equal to 30s, and the standing time after quenching is 5 h;
and 8: and after quenching, placing the casting in an aging furnace, and performing aging treatment to obtain the aluminum-chromium alloy.
Preferably, the stirring time in the step 4 is 20min, and the standing time is 15 min.
By adopting the technical scheme: so that the raw materials can be fully fused, and the quality of the aluminum alloy is improved.
Preferably, the casting pressure in the step 6 is 53-70MPa, the water pressure of cooling water is controlled at 0.1MPa, and the temperature of the aluminum alloy melt is kept at 740 ℃.
By adopting the technical scheme: the normal operation of casting is ensured, the casting effort caused by too low temperature is avoided, and the casting is not easy to form due to too high temperature.
Preferably, the melting temperature in step 1 is 950 ℃ and the melting temperature in step 5 is 820 ℃.
By adopting the technical scheme: so that the raw materials can be melted rapidly, and the processing efficiency and effect are ensured.
The aluminum-chromium alloy finished product obtained by the method has the following main mechanical properties at room temperature: the tensile strength is 384MPa, the yield strength is 297MPa, and the elongation is 16.03%.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Claims (5)
1. The aluminum-chromium alloy with high corrosion resistance strength comprises main materials and auxiliary materials, and is characterized in that: the main materials comprise, by weight, 50-60 parts of aluminum and 15-20 parts of chromium; the auxiliary material comprises 8-14 parts by weight of manganese; 5 to 7 parts of zinc, 4 to 5 parts of nickel, 0.2 to 0.5 part of zirconium, 0.1 to 0.3 part of strontium, 0.3 to 0.6 part of yttrium and 0.1 to 0.4 part of erbium.
2. The process for preparing an aluminum-chromium alloy with high corrosion resistance according to claim 1, wherein the process comprises the following steps: the method comprises the following steps:
step 1: sieving the raw materials, wherein the granularity of the main material is 50-170 μm, the granularity of the auxiliary material is 75-150 μm, and the purity of all the raw materials is more than 99.5 wt%;
step 2: putting the main materials into a mixer in proportion, and stirring for 3-5h at the rotating speed of 30-50r/min to obtain a mixture A;
and step 3: adding the mixture A into a smelting furnace in batches for heating and melting to obtain molten metal B;
and 4, step 4: stirring the metal liquid B at the rotating speed of 200-;
and 5: adding auxiliary materials into the molten metal B to completely melt the auxiliary materials, stirring and standing to obtain a melt C;
step 6: molding and casting the melt C by a hot top casting machine when the melt C reaches a semi-solid state;
and 7: quenching the casting, wherein the quenching heating temperature is 530 ℃ and 610 ℃, the quenching transfer time is less than or equal to 22-30s, and the parking time after quenching is 3-5 h;
and 8: and after quenching, placing the casting in an aging furnace, and performing aging treatment to obtain the aluminum-chromium alloy.
3. The process for preparing an aluminum-chromium alloy with high corrosion resistance according to claim 2, wherein the process comprises the following steps: in the step 4, the stirring time is 10-20min, and the standing time is 5-15 min.
4. The process for preparing an aluminum-chromium alloy with high corrosion resistance according to claim 2, wherein the process comprises the following steps: in step 6, the casting pressure is 53-70MPa, the water pressure of cooling water is controlled at 0.05-0.1MPa, and the temperature of the aluminum alloy melt is kept at 730-.
5. The process for preparing an aluminum-chromium alloy with high corrosion resistance according to claim 1, wherein the process comprises the following steps: the melting temperature in the step 1 is 800-950 ℃, and the melting temperature in the step 5 is 740-820 ℃.
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| CN202111482152.6A CN114150187A (en) | 2021-12-07 | 2021-12-07 | Preparation process of aluminum-chromium alloy with high corrosion resistance and high strength |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101109029A (en) * | 2007-09-06 | 2008-01-23 | 谢应凯 | Composite alloy with deoxidized and corrosion protected aluminum chromium |
| CN104894439A (en) * | 2015-06-25 | 2015-09-09 | 潘应生 | Chromium-aluminum alloy and preparation method thereof |
| CN108441711A (en) * | 2018-03-06 | 2018-08-24 | 淮北富士特铝业有限公司 | A kind of anticorrosion aluminium ally section and its production technology |
| CN109837425A (en) * | 2017-11-24 | 2019-06-04 | 成都兴宇精密铸造有限公司 | A kind of preparation method of novel aluminum chromium |
| CN111699063A (en) * | 2018-02-08 | 2020-09-22 | 肯联铝业技术中心 | Method for manufacturing aluminium-chromium alloy parts |
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2021
- 2021-12-07 CN CN202111482152.6A patent/CN114150187A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101109029A (en) * | 2007-09-06 | 2008-01-23 | 谢应凯 | Composite alloy with deoxidized and corrosion protected aluminum chromium |
| CN104894439A (en) * | 2015-06-25 | 2015-09-09 | 潘应生 | Chromium-aluminum alloy and preparation method thereof |
| CN109837425A (en) * | 2017-11-24 | 2019-06-04 | 成都兴宇精密铸造有限公司 | A kind of preparation method of novel aluminum chromium |
| CN111699063A (en) * | 2018-02-08 | 2020-09-22 | 肯联铝业技术中心 | Method for manufacturing aluminium-chromium alloy parts |
| US20210032727A1 (en) * | 2018-02-08 | 2021-02-04 | C-Tec Constellium Technology Center | Process for manufacturing an aluminum-chromium alloy part |
| CN108441711A (en) * | 2018-03-06 | 2018-08-24 | 淮北富士特铝业有限公司 | A kind of anticorrosion aluminium ally section and its production technology |
Non-Patent Citations (1)
| Title |
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| 刘劲松等: "固液混合铸造Al-Cr合金的耐蚀性能研究", 《化学工业与工程技术》 * |
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Application publication date: 20220308 |