CN113846251A - Extrusion production process of automobile dragging nut profile - Google Patents
Extrusion production process of automobile dragging nut profile Download PDFInfo
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- CN113846251A CN113846251A CN202111135231.XA CN202111135231A CN113846251A CN 113846251 A CN113846251 A CN 113846251A CN 202111135231 A CN202111135231 A CN 202111135231A CN 113846251 A CN113846251 A CN 113846251A
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- extrusion
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- nut profile
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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
- C22C21/02—Alloys based on aluminium with silicon as the next major constituent
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C23/00—Extruding metal; Impact extrusion
- B21C23/02—Making uncoated products
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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
- B22D21/00—Casting non-ferrous metals or metallic compounds so far as their metallurgical properties are of importance for the casting procedure; Selection of compositions therefor
- B22D21/002—Castings of light metals
- B22D21/007—Castings of light metals with low melting point, e.g. Al 659 degrees C, Mg 650 degrees C
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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
- C22F1/043—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 silicon as the next major constituent
-
- 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
- C22F1/05—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 of the Al-Si-Mg type, i.e. containing silicon and magnesium in approximately equal proportions
Abstract
The invention relates to an extrusion production process of an automobile dragging nut profile, and belongs to the technical field of aluminum alloy processing. The 6110A high-strength alloy is adopted, the length of a working belt of a die is shortened, an extrusion production process is optimized, products meeting requirements can be stably produced, and the high-strength thin-wall aluminum profile with the yield strength of more than or equal to 370MPa and the tensile strength of more than or equal to 400MPa can be obtained. The invention can meet the requirement of higher performance of the automobile dragging nut profile under the condition of complex profile section, and further improves the integral quality of the automobile.
Description
Technical Field
The invention belongs to the technical field of aluminum alloy processing, and relates to an extrusion production process of an automobile dragging nut profile.
Background
With the development of automobile manufacturing industry in China, automobile parts strive for high strength and high precision, and part of the parts are increasingly made of high-alloying 6110A materials to improve the strength performance of the parts. High performance is often accompanied with difficulties such as poor formability, high quenching sensitivity and the like, and continuous optimization is needed according to actual production conditions in the actual production process, so that the performance of the part is further improved to meet various requirements. This 6110A alloy drag nut production, circumscribed circle diameter 86mm, and contain the rod of two thin wall free ends, the shaping degree of difficulty is big, and surface quality is poor, and free end and surface are very easily cracked, seriously reduce the yield, improve manufacturing cost, and intensity hardly satisfies the requirement simultaneously.
Disclosure of Invention
In view of the above, the invention aims to provide an extrusion production process for an automobile dragging nut profile, which can stably produce a product meeting the requirements by optimizing the extrusion production process, namely a high-strength thin-wall aluminum profile with yield strength of more than or equal to 370MPa and tensile strength of more than or equal to 400 MPa.
In order to achieve the purpose, the invention provides the following technical scheme:
an extrusion production process of an automobile dragging nut profile adopts aluminum alloy components comprising the following components in parts by weight: 0.90% -1.00%, Fe: 0.20-0.25%, Cu is less than or equal to 0.45-0.50%, Mn: not more than 0.70-0.75%, Mg: 0.80-0.85%, Cr: less than or equal to 0.15-0.20%, Zn: less than or equal to 0-0.10 percent, less than or equal to 0.05 percent of single impurity, less than or equal to 0.15 percent of total impurity and the balance of aluminum; the content of Mg2Si is controlled to be 1.1-1.5 percent, and the content of surplus Si is controlled to be 0.4-0.5 percent; the aluminum alloy is subjected to casting by a casting rod, extrusion and off-line quenching to produce the automobile dragging nut profile.
Optionally, in the casting process of the cast rod, the cast rod is cooled by water cooling after being uniformly fired at 560 ℃ for 8 hours, and the length of the cast rod is controlled to be less than or equal to 740 mm.
Optionally, the amount of the scrap added in the casting process of the cast rod is less than or equal to 20%, and only the aluminum scrap with the surface being the base material is added.
Optionally, the addition amount of the H element in the casting process of the cast rod is less than or equal to 0.2cm3/100 g.
Optionally, the temperature of the extrusion process control mold is 460-500 ℃, the temperature of the extrusion casting rod is 510-530 ℃, and the temperature of the extrusion cylinder is 440-460 ℃.
Optionally, a 3600T horizontal extruder is adopted in the extrusion process, and the extrusion speed is 1.5 m/min.
Optionally, the extrusion process is water tank quenched.
Optionally, the temperature in the off-line quenching process is controlled to be 550 ℃, and the heat preservation time is 4 h.
The invention has the beneficial effects that:
the original automobile dragging nut profile is simple in shape and high in performance requirement, but is mostly made of 6082 alloy, and the development trend of the automobile high standard at the present stage is difficult to match. After the structure of the die and the control of the extrusion process are optimized, under the condition that the section of the section is complex, the 6110A alloy can still ensure the dimensional precision of the section and greatly improve the mechanical property of the section, the yield strength of the section can reach 370Mpa, the tensile strength can reach 400Mpa, the requirement of the automobile dragging nut section on higher performance is met, and the integral quality of an automobile is further improved.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention. The objectives and other advantages of the invention may be realized and attained by the means of the instrumentalities and combinations particularly pointed out hereinafter.
Drawings
For the purposes of promoting a better understanding of the objects, aspects and advantages of the invention, reference will now be made to the following detailed description taken in conjunction with the accompanying drawings in which:
fig. 1 is a sectional view of a profile according to the present invention.
Detailed Description
The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention. It should be noted that the drawings provided in the following embodiments are only for illustrating the basic idea of the present invention in a schematic way, and the features in the following embodiments and examples may be combined with each other without conflict.
Wherein the showings are for the purpose of illustrating the invention only and not for the purpose of limiting the same, and in which there is shown by way of illustration only and not in the drawings in which there is no intention to limit the invention thereto; to better illustrate the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.
The same or similar reference numerals in the drawings of the embodiments of the present invention correspond to the same or similar components; in the description of the present invention, it should be understood that if there is an orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", "front", "rear", etc., based on the orientation or positional relationship shown in the drawings, it is only for convenience of description and simplification of description, but it is not an indication or suggestion that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes, and are not to be construed as limiting the present invention, and the specific meaning of the terms may be understood by those skilled in the art according to specific situations.
The invention relates to an extrusion production process of an automobile dragging nut profile, wherein the section view of the profile is shown in figure 1. The technical points in the production process of the invention are as follows. The invention adopts 6110A alloy, and the designed alloy components comprise Si: 0.90% -1.00%, Fe: 0.20-0.25%, Cu is less than or equal to 0.45-0.50%, Mn: not more than 0.70-0.75%, Mg: 0.80-0.85%, Cr: less than or equal to 0.15-0.20%, Zn: less than or equal to 0-0.10 percent, less than or equal to 0.05 percent of single component, less than or equal to 0.15 percent of total component, and the balance of Al, wherein the content of Mg2Si needs to be controlled within the range of 1.1-1.5 percent, the content of surplus Si needs to be controlled within the range of 0.4-0.5 percent, the content of Cu needs to be strictly controlled within the range of 0.45-0.50 percent, and the content of Mn needs to be controlled within the range of 0.70-0.75 percent, so that the alloy strength of the product is improved, and the surface quality and the extrudability of the component are ensured to the maximum extent on the basis of ensuring the mechanical property.
Casting the cast rod: after the temperature of 560 ℃ is equalized for 8 hours, the mixture is cooled by water, so that the strengthening phase is fully melted into the matrix and is dispersed and distributed, the cast ingot is prevented from being segregated, and the performance and the extrudability of the cast rod are improved; strictly controlling the purity of the casting rod, ensuring that the amount of added waste materials is not allowed to exceed 20 percent during casting of the cast ingot, only adding waste aluminum with the surface being a base material, and ensuring that the content of hydrogen elements in the casting process is not more than 0.2cm3/100g。
In the aspect of mold design: in order to avoid serious galling particles and more serious cracks on the surface, the working band of the die is shortened from 6mm to 3 mm.
The extrusion process aspect: selecting a 3600T horizontal extruder for production, and producing by using 740mm short cast ingots; meanwhile, the temperature of the die is controlled to be 460-500 ℃, the temperature of the extrusion cast ingot is controlled to be 510-530 ℃, and the temperature of the extrusion cylinder is controlled to be 440-460 ℃; cracks appear on the lower surface and the free end of the product after high-speed extrusion, so that on one hand, the metal fluidity is enhanced by improving the integral extrusion temperature, on the other hand, the extrusion speed is reduced to 1.5m/min, the extrusion pressure is reduced, the qualified product size is ensured, no cracks exist, and the rejection rate is reduced; on the other hand, the product is cooled without scalding the material platform to cause surface damage by using the water tank for quenching,
in the aspect of off-line quenching: the method adopts off-line quenching at 550 ℃, water cooling and cooling after heat preservation for 4 hours to ensure that the strengthening phase can be completely dissolved in a matrix, and then the performance requirement is met through peak value aging.
According to the invention, the product formability is improved by reasonably controlling each process parameter, adjusting the die structure and the extrusion process, and the formed section is qualified in size and has ultrahigh mechanical performance.
Finally, the above embodiments are only intended to illustrate the technical solutions of the present invention and not to limit the present invention, and although the present invention has been described in detail with reference to the preferred embodiments, it will be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions, and all of them should be covered by the claims of the present invention.
Claims (8)
1. The extrusion production process of the automobile dragging nut profile is characterized by comprising the following steps of: the adopted aluminum alloy comprises the following components in percentage by weight: 0.90% -1.00%, Fe: 0.20-0.25%, Cu is less than or equal to 0.45-0.50%, Mn: not more than 0.70-0.75%, Mg: 0.80-0.85%, Cr: less than or equal to 0.15-0.20%, Zn: less than or equal to 0-0.10 percent, less than or equal to 0.05 percent of single impurity, less than or equal to 0.15 percent of total impurity and the balance of aluminum; the content of Mg2Si is controlled to be 1.1-1.5 percent, and the content of surplus Si is controlled to be 0.4-0.5 percent;
the aluminum alloy is subjected to casting by a casting rod, extrusion and off-line quenching to produce the automobile dragging nut profile.
2. The extrusion production process of the automotive drag nut profile according to claim 1, characterized in that: in the casting process of the cast rod, the cast rod is cooled by water after being uniformly fired for 8 hours at 560 ℃, and the length of the cast rod is controlled to be less than or equal to 740 mm.
3. The extrusion production process of the automotive drag nut profile according to claim 1, characterized in that: the amount of the added waste materials in the casting process of the cast rod is less than or equal to 20 percent, and only the waste aluminum with the surface as the base material is added.
4. The extrusion production process of the automotive drag nut profile according to claim 1, characterized in that: the addition amount of the H element in the casting process of the cast rod is less than or equal to 0.2cm3/100g。
5. The extrusion production process of the automotive drag nut profile according to claim 1, characterized in that: the temperature of the extrusion process control mold is 460-500 ℃, the temperature of the extrusion casting rod is 510-530 ℃, and the temperature of the extrusion cylinder is 440-460 ℃.
6. The extrusion production process of the automotive drag nut profile according to claim 1, characterized in that: the extrusion process adopts a 3600T horizontal extruder, and the extrusion speed is 1.5 m/min.
7. The extrusion production process of the automotive drag nut profile according to claim 1, characterized in that: the extrusion process adopts water tank quenching.
8. The extrusion production process of the automotive drag nut profile according to claim 1, characterized in that: the temperature of the off-line quenching process is controlled to be 550 ℃, and the heat preservation time is 4 h.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111135231.XA CN113846251A (en) | 2021-09-27 | 2021-09-27 | Extrusion production process of automobile dragging nut profile |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111135231.XA CN113846251A (en) | 2021-09-27 | 2021-09-27 | Extrusion production process of automobile dragging nut profile |
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| CN113846251A true CN113846251A (en) | 2021-12-28 |
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| CN202111135231.XA Pending CN113846251A (en) | 2021-09-27 | 2021-09-27 | Extrusion production process of automobile dragging nut profile |
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Citations (6)
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| CN105296811A (en) * | 2015-10-23 | 2016-02-03 | 苏州有色金属研究院有限公司 | High-strength 6xxx aluminum alloy for mobile phone parts and machining method thereof |
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| CN111041293A (en) * | 2019-12-25 | 2020-04-21 | 辽宁忠旺集团有限公司 | Production process of high-strength thin-wall section |
| CN112609111A (en) * | 2020-11-27 | 2021-04-06 | 辽宁忠旺集团有限公司 | 6110 aluminum alloy section for battery tray and preparation method thereof |
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2021
- 2021-09-27 CN CN202111135231.XA patent/CN113846251A/en active Pending
Patent Citations (6)
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| CN105296811A (en) * | 2015-10-23 | 2016-02-03 | 苏州有色金属研究院有限公司 | High-strength 6xxx aluminum alloy for mobile phone parts and machining method thereof |
| CN108165841A (en) * | 2018-01-29 | 2018-06-15 | 辽宁忠旺集团有限公司 | A kind of 6008 aluminium alloy energy-absorption box processing technology of automobile |
| CN110257674A (en) * | 2019-06-26 | 2019-09-20 | 江苏大学 | A kind of high tough endurance wrought aluminium alloy and preparation method thereof |
| CN110373580A (en) * | 2019-08-16 | 2019-10-25 | 马鞍山市新马精密铝业股份有限公司 | A kind of automobile batteries pallet high-strength aluminum alloy section and its production method |
| CN111041293A (en) * | 2019-12-25 | 2020-04-21 | 辽宁忠旺集团有限公司 | Production process of high-strength thin-wall section |
| CN112609111A (en) * | 2020-11-27 | 2021-04-06 | 辽宁忠旺集团有限公司 | 6110 aluminum alloy section for battery tray and preparation method thereof |
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Application publication date: 20211228 |
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