CN111778460B - Method for improving indentation defect of high-quality aluminum alloy round ingot casting through soaking treatment - Google Patents
Method for improving indentation defect of high-quality aluminum alloy round ingot casting through soaking treatment Download PDFInfo
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- CN111778460B CN111778460B CN201910269132.7A CN201910269132A CN111778460B CN 111778460 B CN111778460 B CN 111778460B CN 201910269132 A CN201910269132 A CN 201910269132A CN 111778460 B CN111778460 B CN 111778460B
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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 relates to the technical field of aluminum alloy heat treatment, in particular to a method for improving the indentation defect of high-quality aluminum alloy round ingot heat-soaking treatment, which specifically comprises the following steps: s1: placing the aluminum alloy round cast ingot on an aluminum alloy plate with the thickness more than 5 mm; s2: preheating the aluminum alloy round cast ingot, wherein the preheating temperature range is 475-525 ℃, and the preheating time is 4-7 h; s3: homogenizing the aluminum alloy round cast ingot, wherein the homogenizing temperature range is 550-600 ℃, and the homogenizing time is 3-10 h. The method for improving the indentation defect of the high-quality aluminum alloy round ingot in the soaking treatment provided by the invention eliminates the indentation defect on the surface of the round ingot, improves the mechanical property of the round ingot and improves the quality of an aluminum alloy product.
Description
Technical Field
The invention relates to the technical field of aluminum alloy heat treatment, in particular to a method for improving the indentation defect of high-quality aluminum alloy round ingot heat-soaking treatment.
Background
The aluminum alloy has the characteristics of light weight, good formability, high strength, corrosion resistance, recyclability and the like, is widely applied to the fields of architectural decoration, machinery, IT electronics and the like, and along with the development of modern industry and science and technology, the application of aluminum alloy products in the fields of aerospace, ships, rail traffic, automobile light weight and the like is gradually expanded, so that higher requirements are put forward on the comprehensive quality of the aluminum alloy material.
Aluminum alloy products are formed by plastic working processes such as extrusion, rolling, forging, etc. from billets, wherein the billets commonly used for extrusion are typically round ingots cast by a semi-continuous casting process. As a front-end raw material for aluminum alloy extrusion manufacturing, the quality of an aluminum alloy round cast ingot directly influences the plastic processing performance and the comprehensive performance of a final product. Because the cooling speed in the casting process is high, the crystallization is carried out in an unbalanced state, so that the defects of residual stress, uneven components and the like of the round cast ingot exist, the subsequent plastic processing process is influenced, and the round cast ingot needs to be subjected to homogenization treatment.
The aluminum alloy round ingot homogenizing heat treatment is to place the aluminum alloy round ingot on a material rack and then place the aluminum alloy round ingot in a homogenizing treatment furnace for heat preservation treatment. Because the aluminum alloy round ingot and the material rest are subjected to thermal expansion at high temperature in the soaking furnace, the friction coefficients of aluminum and steel are different, so that the contact position of the round ingot and the soaking material rest generates relative motion and deformation, and indentation defects of pits appear at the contact position of the round ingot and the soaking material rest, particularly, the high-quality low-strength alloy ingot is low in hardness and obvious in plastic deformation, when an aluminum alloy round bar with the defects is extruded, the aluminum alloy round bar not only can damage an extrusion cylinder and an extrusion die of extrusion equipment, but also can easily form quality defects such as oxidation inclusion, air holes and the like in an extruded product, and huge loss is caused in the manufacturing of a precise high-quality aluminum alloy extruded material.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: provides a method for improving the indentation defect of the soaking treatment of the high-quality aluminum alloy round ingot by eliminating the surface indentation of the round ingot and improving the strength of the round ingot.
In order to solve the technical problems, the invention adopts the technical scheme that:
a method for improving the indentation defect of the soaking treatment of the high-quality aluminum alloy round ingot comprises the following steps:
s1: placing the aluminum alloy round cast ingot on an aluminum alloy plate with the thickness more than 5 mm;
s2: preheating the aluminum alloy round cast ingot, wherein the preheating temperature range is 475-525 ℃, and the preheating time is 4-7 h;
s3: homogenizing the aluminum alloy round cast ingot, wherein the homogenizing temperature range is 550-600 ℃, and the homogenizing time is 3-10 h.
The invention has the beneficial effects that: a method for improving the indentation defect of the soaking treatment of the high-quality aluminum alloy round ingot comprises the following steps: s1: placing the aluminum alloy round cast ingot on an aluminum alloy plate with the thickness more than 5 mm; s2: preheating the aluminum alloy round cast ingot, wherein the preheating temperature range is 475-525 ℃, and the preheating time is 4-7 h; s3: homogenizing the aluminum alloy round cast ingot, wherein the homogenizing temperature range is 550-600 ℃, and the homogenizing time is 3-10 h. The aluminum alloy plate with the thickness larger than 5mm is additionally arranged between the aluminum alloy round ingot and the soaking material rack, and the steel soaking material rack and the aluminum alloy round ingot are separated by the aluminum alloy plate during soaking treatment, so that the problems that the aluminum alloy round ingot and the material rack expand under the high temperature in the soaking furnace, and the contact part of the round ingot and the soaking material rack moves relatively due to different friction coefficients of aluminum and steel, so that the round ingot and the soaking material rack deform and indentation defects of pits appear at the contact position of the round ingot and the soaking material rack can be solved; the thickness of the aluminum alloy plate is more than 5mm, so that the strength and the stress deformation resistance of the aluminum alloy plate can be ensured, the friction and the stress between the aluminum alloy plate and the aluminum alloy round ingot can be further reduced, meanwhile, the soaking effect of the aluminum alloy round ingot can be ensured, and the condition of soaking damage is avoided; preheating the aluminum alloy round ingot at 475-525 ℃ for 4-7 h, wherein the internal stress of the aluminum alloy round ingot is eliminated, and the efficiency and effect of soaking treatment can be improved; finally, homogenizing the aluminum alloy round ingot for 3-10 hours at the temperature of 550-600 ℃, and reasonably arranging the homogenizing temperature and the corresponding time, so that the mechanical property and the stress corrosion resistance of the aluminum alloy round ingot can be improved, and cracks of the aluminum alloy can be prevented; the aluminum alloy material can effectively reduce the generation of indentations, depressions, pits and the like on the surface of the aluminum alloy round ingot, and the product quality is improved. The aluminum alloy plate is horizontally fixed on the working frame through the bolts, and compared with a welding connection mode, cold and hot deformation tearing points of the aluminum alloy plate are avoided, defects generated under the stress action of the aluminum alloy plate are reduced, the soaking quality of the aluminum alloy round cast ingot is affected, and meanwhile the service life of the aluminum alloy plate is prolonged. The method for improving the indentation defect of the high-quality aluminum alloy round ingot in the soaking treatment provided by the invention eliminates the indentation defect on the surface of the round ingot, improves the mechanical property of the round ingot and improves the quality of an aluminum alloy product.
Detailed Description
In order to explain the technical content, the objects and the effects of the present invention in detail, the following description will be given with reference to the embodiments.
The most key concept of the invention is as follows: through add an aluminum alloy plate that thickness is greater than 5mm between aluminum alloy circular cast ingot and soaking work or material rest, when soaking treatment, aluminum alloy plate separates steel soaking work or material rest and aluminum alloy circular cast ingot, can effectively reduce because aluminum alloy circular cast ingot, the work or material rest is thermal expansion under the high temperature in the soaking furnace, and the coefficient of friction of aluminium and steel differs and makes circular cast ingot and soaking work or material rest contact department produce relative motion, thereby take place to warp, lead to circular cast ingot and soaking work or material rest contact position the problem of the indentation defect of pit to appear, adopt aluminum alloy plate can guarantee sufficient intensity, can avoid taking place the problem of gluing aluminium again.
The invention provides a method for improving the indentation defect of soaking treatment of a high-quality aluminum alloy round ingot, which specifically comprises the following steps:
s1: placing the aluminum alloy round cast ingot on an aluminum alloy plate with the thickness more than 5 mm;
s2: preheating the aluminum alloy round cast ingot, wherein the preheating temperature range is 475-525 ℃, and the preheating time is 4-7 h;
s3: homogenizing the aluminum alloy round cast ingot, wherein the homogenizing temperature range is 550-600 ℃, and the homogenizing time is 3-10 h.
From the above description, the beneficial effects of the present invention are: the aluminum alloy plate with the thickness larger than 5mm is additionally arranged between the aluminum alloy round ingot and the soaking material rack, and the steel soaking material rack and the aluminum alloy round ingot are separated by the aluminum alloy plate during soaking treatment, so that the problems that the aluminum alloy round ingot and the material rack expand under the high temperature in the soaking furnace, and the contact part of the round ingot and the soaking material rack moves relatively due to different friction coefficients of aluminum and steel, so that the round ingot and the soaking material rack deform and indentation defects of pits appear at the contact position of the round ingot and the soaking material rack can be solved; the thickness of the aluminum alloy plate is more than 5mm, so that the strength and the stress deformation resistance of the aluminum alloy plate can be ensured, the friction and the stress between the aluminum alloy plate and the aluminum alloy round ingot can be further reduced, meanwhile, the soaking effect of the aluminum alloy round ingot can be ensured, and the condition of soaking damage is avoided; preheating the aluminum alloy round ingot at 475-525 ℃ for 4-7 h, wherein the internal stress of the aluminum alloy round ingot is eliminated, and the efficiency and effect of soaking treatment can be improved; finally, homogenizing the aluminum alloy round ingot for 3-10 hours at the temperature of 550-600 ℃, and reasonably arranging the homogenizing temperature and the corresponding time, so that the mechanical property and the stress corrosion resistance of the aluminum alloy round ingot can be improved, and cracks of the aluminum alloy can be prevented; the aluminum alloy material can effectively reduce the generation of indentations, depressions, pits and the like on the surface of the aluminum alloy round ingot, and the product quality is improved.
Further, the S1 specifically includes:
and horizontally fixing the aluminum alloy plate on the working frame through bolts.
According to the description, the aluminum alloy plate is horizontally fixed on the working frame through the bolts, and compared with a welding connection mode, cold and hot deformation tearing points of the aluminum alloy plate are avoided, defects generated under the stress action are reduced, the soaking quality of the aluminum alloy round cast ingot is affected, and meanwhile the service life of the aluminum alloy plate is prolonged.
Further, the S2 specifically includes:
preheating the aluminum alloy round cast ingot, wherein the preheating temperature is 500 ℃, and the preheating time is 6 h.
Further, the S2 specifically includes:
the homogenization temperature is 550 ℃ and the homogenization time is 3 h.
The first embodiment of the invention is as follows: a method for improving the indentation defect of the soaking treatment of the high-quality aluminum alloy round ingot comprises the following steps:
s1: placing the aluminum alloy round cast ingot on an aluminum alloy plate with the thickness more than 5 mm; horizontally fixing an aluminum alloy plate on a working frame through bolts;
s2: preheating the aluminum alloy round cast ingot, wherein the preheating temperature is 475 ℃, and the preheating time is 4 h;
s3: homogenizing the aluminum alloy round cast ingot at 550 ℃ for 3 h.
The difference between the second embodiment of the present invention and the first embodiment is: preheating at 500 deg.C for 5 h; the homogenization temperature is 575 and the homogenization time is 5 h.
The difference between the third embodiment of the present invention and the first embodiment is: the preheating temperature is 525 ℃, and the preheating time is 7 h; the homogenization temperature is 600 ℃ and the homogenization time is 10 h.
In summary, the invention provides a method for improving the indentation defect of the high-quality aluminum alloy round ingot during the soaking treatment, which comprises the following steps: s1: placing the aluminum alloy round cast ingot on an aluminum alloy plate with the thickness more than 5 mm; s2: preheating the aluminum alloy round cast ingot, wherein the preheating temperature range is 475-525 ℃, and the preheating time is 4-7 h; s3: homogenizing the aluminum alloy round cast ingot, wherein the homogenizing temperature range is 550-600 ℃, and the homogenizing time is 3-10 h. The aluminum alloy plate with the thickness larger than 5mm is additionally arranged between the aluminum alloy round ingot and the soaking material rack, and the steel soaking material rack and the aluminum alloy round ingot are separated by the aluminum alloy plate during soaking treatment, so that the problems that the aluminum alloy round ingot and the material rack expand under the high temperature in the soaking furnace, and the contact part of the round ingot and the soaking material rack moves relatively due to different friction coefficients of aluminum and steel, so that the round ingot and the soaking material rack deform and indentation defects of pits appear at the contact position of the round ingot and the soaking material rack can be solved; the thickness of the aluminum alloy plate is more than 5mm, so that the strength and the stress deformation resistance of the aluminum alloy plate can be ensured, the friction and the stress between the aluminum alloy plate and the aluminum alloy round ingot can be further reduced, meanwhile, the soaking effect of the aluminum alloy round ingot can be ensured, and the condition of soaking damage is avoided; preheating the aluminum alloy round ingot at 475-525 ℃ for 4-7 h, wherein the internal stress of the aluminum alloy round ingot is eliminated, and the efficiency and effect of soaking treatment can be improved; finally, homogenizing the aluminum alloy round ingot for 3-10 hours at the temperature of 550-600 ℃, and reasonably arranging the homogenizing temperature and the corresponding time, so that the mechanical property and the stress corrosion resistance of the aluminum alloy round ingot can be improved, and cracks of the aluminum alloy can be prevented; the aluminum alloy material can effectively reduce the generation of indentations, depressions, pits and the like on the surface of the aluminum alloy round ingot, and the product quality is improved. The aluminum alloy plate is horizontally fixed on the working frame through the bolts, and compared with a welding connection mode, cold and hot deformation tearing points of the aluminum alloy plate are avoided, defects generated under the stress action of the aluminum alloy plate are reduced, the soaking quality of the aluminum alloy round cast ingot is affected, and meanwhile the service life of the aluminum alloy plate is prolonged. The method for improving the indentation defect of the high-quality aluminum alloy round ingot in the soaking treatment provided by the invention eliminates the indentation defect on the surface of the round ingot, improves the mechanical property of the round ingot and improves the quality of an aluminum alloy product.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all equivalent modifications made by the present invention in the specification or directly or indirectly applied to the related technical field are included in the scope of the present invention.
Claims (4)
1. The method for improving the indentation defect of the high-quality aluminum alloy round ingot during soaking treatment is characterized by comprising the following steps:
s1: placing the aluminum alloy round cast ingot on an aluminum alloy plate with the thickness more than 5 mm;
s2: preheating the aluminum alloy round cast ingot, wherein the preheating temperature range is 475-525 ℃, and the preheating time is 4-7 h;
s3: homogenizing the aluminum alloy round cast ingot, wherein the homogenizing temperature range is 550-600 ℃, and the homogenizing time is 3-10 h.
2. The method for improving the indentation defects of the soaking treatment of the high-quality aluminum alloy round ingot according to claim 1, wherein the S1 specifically comprises:
and horizontally fixing the aluminum alloy plate on the working frame through bolts.
3. The method for improving the indentation defects of the soaking treatment of the high-quality aluminum alloy round ingot according to claim 1, wherein the S2 specifically comprises:
preheating the aluminum alloy round cast ingot, wherein the preheating temperature is 500 ℃, and the preheating time is 6 h.
4. The method for improving the indentation defects of the soaking treatment of the high-quality aluminum alloy round ingot according to claim 1, wherein the S3 specifically comprises:
the homogenization temperature is 550 ℃ and the homogenization time is 3 h.
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| CN201910269132.7A CN111778460B (en) | 2019-04-04 | 2019-04-04 | Method for improving indentation defect of high-quality aluminum alloy round ingot casting through soaking treatment |
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| CN201910269132.7A CN111778460B (en) | 2019-04-04 | 2019-04-04 | Method for improving indentation defect of high-quality aluminum alloy round ingot casting through soaking treatment |
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| JP4477999B2 (en) * | 2004-11-30 | 2010-06-09 | 株式会社神戸製鋼所 | Method for manufacturing aluminum alloy plate for magnetic disk, aluminum alloy plate for magnetic disk, and aluminum alloy substrate for magnetic disk |
| CN206553612U (en) * | 2017-03-01 | 2017-10-13 | 福建省南平铝业股份有限公司 | Aluminium ingot homogenize process charging tray |
| CN107699755B (en) * | 2017-09-28 | 2019-09-20 | 山东南山铝业股份有限公司 | A kind of aluminium alloys for auto body and preparation method thereof |
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