CN114318033B - Preparation method of aluminum-chromium alloy - Google Patents
Preparation method of aluminum-chromium alloy Download PDFInfo
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- CN114318033B CN114318033B CN202111462465.5A CN202111462465A CN114318033B CN 114318033 B CN114318033 B CN 114318033B CN 202111462465 A CN202111462465 A CN 202111462465A CN 114318033 B CN114318033 B CN 114318033B
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Abstract
The invention discloses a preparation method of an aluminum-chromium alloy, which relates to the technical field of aluminum-chromium alloys and comprises the following steps: the method comprises the following steps of raw material preparation, primary mixing, secondary mixing, primary raw material smelting, secondary raw material smelting, tertiary mixing, degassing and filtering treatment, pouring and forming, processing and packaging. According to the invention, through the arrangement of primary mixing, primary raw material smelting, secondary mixing, secondary raw material smelting and tertiary mixing, the purity of the mixed raw materials is higher, a large amount of high-melting-point particles can be generated by adding the aluminum-boron intermediate alloy, the aluminum-boron intermediate alloy can be used as an external crystal nucleus to refine the crystal grain structure during solidification, the strength and plasticity of an aluminum alloy finished product are improved, the aluminum-boron intermediate alloy can also be used for preparing pure aluminum and high-purity boron salt, the purity of the aluminum alloy is higher after the aluminum-boron intermediate alloy is added, and the condition that the purity of the aluminum-chromium alloy is insufficient after the aluminum-chromium alloy is prepared is avoided.
Description
Technical Field
The invention relates to the technical field of aluminum-chromium alloy, in particular to a preparation method of aluminum-chromium alloy.
Background
The high-chromium aluminum alloy is an excellent wear-resistant, heat-resistant and corrosion-resistant light alloy material, has potential industrial application value, one or more metal elements or non-metal elements must be added into aluminum materials in the casting process, common elements comprise silicon, iron, copper, manganese, titanium, magnesium, chromium, zirconium, tin, boron, rare earth and the like, chromium is an important element in aluminum alloy addition elements, and the chromium can enhance the strength, toughness, surface smoothness, oxidation resistance, corrosion resistance and machining performance of the aluminum alloy. Chromium significantly increases the creep strength and recrystallization temperature of aluminum.
In the existing aluminum-chromium alloy preparation process, the processes of mixing, smelting, stirring and the like are required among raw materials, and all the raw materials are usually put into the preparation process to achieve the convenience of rapid preparation, but the raw materials are piled up and crowded, so that the purity of the prepared mixed raw materials is insufficient, and the quality of products prepared and processed subsequently is influenced.
Disclosure of Invention
The invention aims to provide a preparation method of an aluminum-chromium alloy, which aims to solve the technical problem of insufficient purity of the prepared aluminum-chromium alloy.
In order to achieve the purpose, the invention provides the following technical scheme: a preparation method of an aluminum-chromium alloy comprises the following steps:
the method comprises the following steps: preparing raw materials;
step two: primary mixing;
step three: mixing for the second time;
step four: smelting a primary raw material;
step five: smelting a secondary raw material;
step six: mixing for the third time;
step seven: degassing and filtering;
step eight: pouring and forming;
step nine: and (6) processing and packaging.
Further, 45-70 parts by mass of aluminum, 20-40 parts by mass of chromium, 2-8 parts by mass of iron, 5-15 parts by mass of sodium nitrate and 10-27 parts by mass of aluminum-boron intermediate alloy are prepared as raw materials in the first step.
By adopting the technical scheme, the materials can be conveniently taken and used in the subsequent preparation.
Further, in the first mixing in the second step, 40% by mass of aluminum, 40% by mass of chromium, 40% by mass of iron, 40% by mass of sodium nitrate and 40% by mass of aluminum-boron intermediate alloy are uniformly added into a mixer to be fully mixed for 15 minutes, and then taken out for standby.
By adopting the technical scheme, the primary mixed raw material can be obtained for subsequent use.
Further, in the second mixing in the third step, the rest 60% by mass of aluminum, 60% by mass of chromium, 60% by mass of iron, 60% by mass of sodium nitrate and 60% by mass of aluminum-boron intermediate alloy are uniformly added into a mixer to be fully mixed for 20 minutes, and then taken out for standby.
By adopting the technical scheme, the secondary mixed raw material can be obtained for subsequent use.
Further, the mixture obtained in the second step needs to be uniformly put into a smelting furnace for primary raw material smelting in the fourth step, the smelting temperature is 1200-1800 ℃, and the smelting time is 5-10 minutes.
By adopting the technical scheme, the mixed raw material solution obtained after primary raw material smelting can be obtained for subsequent use.
Further, in the step five, the mixture obtained in the step three is required to be uniformly put into a smelting furnace for secondary raw material smelting, the smelting temperature is 1200-1800 ℃, and the smelting time is 8-15 minutes.
By adopting the technical scheme, the mixed raw material solution obtained after the secondary raw material smelting can be obtained for subsequent use.
Further, the third mixing in the sixth step needs to uniformly feed the two parts of the smelting mixed raw materials obtained in the fourth and fifth steps into the same smelting furnace, the smelting temperature is 2000-2600 ℃, the smelting time is 20-30 minutes, and the raw materials are uniformly stirred at the speed of 30 revolutions per minute during the smelting period to obtain the mixed raw materials.
By adopting the technical scheme, the final mixed raw material solution can be obtained for subsequent use.
Further, in the degassing and filtering treatment in the seventh step, hexachloroethane is added to the mixed raw material obtained in the sixth step for an alloy reaction to perform a degassing function, and the mixed raw material is filtered to obtain a high-purity mixed raw material.
By adopting the technical scheme, the purity of the mixed raw material solution is improved.
Further, in the smelting and forming in the eighth step, the mixed raw material in the seventh step needs to be injected into a pouring mold and cooled, so as to obtain an aluminum-chromium alloy ingot blank.
By adopting the technical scheme, the aluminum-chromium alloy ingot blank can be obtained for subsequent use.
Further, in the step nine, the polishing step needs to polish and polish the surface layer of the aluminum-chromium alloy ingot blank by an automatic machine tool, coat paint, and finally package.
By adopting the technical scheme, the aluminum-chromium alloy ingot blank can be processed into a high-quality aluminum-chromium alloy ingot for later use.
Compared with the prior art, the invention has the beneficial effects that:
1. the aluminum-boron intermediate alloy can be used for preparing pure aluminum and high-purity boron salt, the purity of the aluminum alloy is higher after the aluminum alloy is added, and the aluminum-boron intermediate alloy can be used for producing a large amount of high-melting-point particles and refining a grain structure as an external crystal nucleus during solidification, so that the strength and plasticity of an aluminum alloy finished product are improved.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example (b): a preparation method of an aluminum-chromium alloy comprises the following steps:
the method comprises the following steps: preparing raw materials;
step two: primary mixing;
step three: mixing for the second time;
step four: smelting a primary raw material;
step five: smelting a secondary raw material;
step six: mixing for the third time;
step seven: degassing and filtering;
step eight: pouring and molding;
step nine: and (6) processing and packaging.
Further, in the first step, 45-70 parts by mass of aluminum, 20-40 parts by mass of chromium, 2-8 parts by mass of iron, 5-15 parts by mass of sodium nitrate and 10-27 parts by mass of aluminum-boron intermediate alloy are prepared for raw material preparation, so that the aluminum-boron intermediate alloy can be used in subsequent preparation.
Further, in the first mixing in the second step, 40% by mass of aluminum, 40% by mass of chromium, 40% by mass of iron, 40% by mass of sodium nitrate and 40% by mass of aluminum-boron intermediate alloy are uniformly added into a mixer to be fully mixed for 15 minutes, and the mixture is taken out for later use to obtain a first mixed raw material for later use.
Further, in the second mixing in the third step, the rest 60% by mass of aluminum, 60% by mass of chromium, 60% by mass of iron, 60% by mass of sodium nitrate and 60% by mass of aluminum-boron intermediate alloy are uniformly added into a mixer to be fully mixed for 20 minutes, and then the mixture is taken out for standby, so that a second mixed raw material can be obtained for subsequent use.
Further, in the step four, the mixture obtained in the step two needs to be uniformly put into a smelting furnace for smelting for the first raw material, and the mixed raw material solution obtained after the first raw material is smelted can be obtained for subsequent use at the smelting temperature of 1200-1800 ℃ for 5-10 minutes.
Further, in the step five, the mixture obtained in the step three is required to be uniformly put into a smelting furnace for smelting secondary raw materials, and the mixed raw material solution obtained after smelting the secondary raw materials can be obtained for subsequent use at the smelting temperature of 1200-1800 ℃ for 8-15 minutes.
Further, in the third mixing in the sixth step, two parts of the smelting mixed raw materials obtained in the fourth step and the fifth step are uniformly added into the same smelting furnace, the smelting temperature is 2000-2600 ℃, the smelting time is 20-30 minutes, and the materials are uniformly stirred at the rotating speed of 30 revolutions per minute during smelting to obtain mixed raw materials, so that the final mixed raw material solution can be obtained for subsequent use.
Further, in the degassing and filtering treatment in the seventh step, hexachloroethane is added to the mixed raw material obtained in the sixth step for alloy reaction, so that a degassing effect is achieved, and the mixed raw material is filtered to obtain a high-purity mixed raw material, so that the purity of the mixed raw material solution is improved.
Further, in the smelting and forming in the step eight, the mixed raw material in the step seven needs to be injected into a pouring mold and cooled to obtain an aluminum-chromium alloy ingot blank, and the aluminum-chromium alloy ingot blank can be obtained for subsequent use.
Further, in the step nine, the polishing step needs to polish and polish the surface layer of the aluminum-chromium alloy ingot blank by an automatic machine tool, coat paint, and finally package, so that the aluminum-chromium alloy ingot blank can be processed into a high-quality aluminum-chromium alloy ingot for later use.
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 (4)
1. The preparation method of the aluminum-chromium alloy is characterized by comprising the following steps of:
the method comprises the following steps: preparing raw materials, wherein the raw materials are prepared by 45-70 parts by mass of aluminum, 20-40 parts by mass of chromium, 2-8 parts by mass of iron, 5-15 parts by mass of sodium nitrate and 10-27 parts by mass of aluminum-boron intermediate alloy;
step two: primary mixing, namely uniformly adding 40% by mass of aluminum, 40% by mass of chromium, 40% by mass of iron, 40% by mass of sodium nitrate and 40% by mass of aluminum-boron intermediate alloy into a mixer for fully mixing for 15 minutes, and taking out for later use;
step three: secondary mixing, namely uniformly adding the rest 60% of aluminum, 60% of chromium, 60% of iron, 60% of sodium nitrate and 60% of aluminum-boron intermediate alloy into a mixer for fully mixing for 20 minutes, and taking out for later use;
step four: smelting the primary raw material, namely uniformly putting the mixture obtained in the step two into a smelting furnace, and smelting for 5-10 minutes at the smelting temperature of 1200-1800 ℃;
step five: smelting the secondary raw material, namely uniformly putting the mixture obtained in the third step into a smelting furnace, and smelting for 8-15 minutes at the smelting temperature of 1200-1800 ℃;
step six: mixing for the third time, namely uniformly putting the two parts of smelting mixed raw materials obtained in the fourth step and the fifth step into the same smelting furnace, uniformly stirring at the smelting temperature of 2000-2600 ℃ for 20-30 minutes and at the rotating speed of 30 revolutions per minute during smelting to obtain mixed raw materials;
step seven: degassing and filtering;
step eight: casting and molding;
step nine: and (6) processing and packaging.
2. The method for preparing an aluminum-chromium alloy as claimed in claim 1, wherein the degassing and filtering treatment in the seventh step is to add hexachloroethane to the mixed raw material obtained in the sixth step for alloying reaction, so as to perform degassing and filtering to obtain a high-purity mixed raw material.
3. The method for preparing an aluminum-chromium alloy according to claim 1, wherein in the eighth step, the mixed raw materials in the seventh step are poured into a casting mold and cooled to obtain an aluminum-chromium alloy ingot blank.
4. The method for preparing the aluminum-chromium alloy according to claim 1, wherein in the ninth step, the ingot blank of the aluminum-chromium alloy is subjected to surface layer grinding and polishing by an automatic machine tool, is coated with paint and is finally packaged.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3625677A (en) * | 1967-12-30 | 1971-12-07 | Ti Group Services Ltd | Aluminum alloys |
| US4313759A (en) * | 1979-07-16 | 1982-02-02 | Institut Cerac S.A. | Wear resistant aluminium alloy |
| CN102212723A (en) * | 2011-05-10 | 2011-10-12 | 李建明 | Preparation method of chromium-aluminum intermediate alloy material |
| 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 |
| CN112680637A (en) * | 2020-12-30 | 2021-04-20 | 隆达铝业（烟台）有限公司 | Aluminum alloy ingot processing technology |
-
2021
- 2021-12-03 CN CN202111462465.5A patent/CN114318033B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3625677A (en) * | 1967-12-30 | 1971-12-07 | Ti Group Services Ltd | Aluminum alloys |
| US4313759A (en) * | 1979-07-16 | 1982-02-02 | Institut Cerac S.A. | Wear resistant aluminium alloy |
| CN102212723A (en) * | 2011-05-10 | 2011-10-12 | 李建明 | Preparation method of chromium-aluminum intermediate alloy material |
| 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 |
| CN112680637A (en) * | 2020-12-30 | 2021-04-20 | 隆达铝业（烟台）有限公司 | Aluminum alloy ingot processing technology |
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Denomination of invention: A preparation method of aluminum chromium alloy Effective date of registration: 20230809 Granted publication date: 20221028 Pledgee: Jiangxi Lianhua rural commercial bank Limited by Share Ltd. Pledgor: Jiangxi Ke Rong alloy material Co.,Ltd. Registration number: Y2023980051647 |