CN112853165B - Highlight aluminum oxide profile for automobile exterior trimming parts and processing method thereof - Google Patents
Highlight aluminum oxide profile for automobile exterior trimming parts and processing method thereof Download PDFInfo
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- CN112853165B CN112853165B CN202011593285.6A CN202011593285A CN112853165B CN 112853165 B CN112853165 B CN 112853165B CN 202011593285 A CN202011593285 A CN 202011593285A CN 112853165 B CN112853165 B CN 112853165B
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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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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/18—Hardening; Quenching with or without subsequent tempering
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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
- 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
- C22F1/05—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
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- Chemical & Material Sciences (AREA)
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- Crystallography & Structural Chemistry (AREA)
- Extrusion Of Metal (AREA)
Abstract
The invention belongs to the technical field of aluminum alloy materials, and particularly relates to a highlight aluminum oxide profile for an automobile exterior trim part and a processing method thereof. The iron content in the highlight aluminum oxide profile is 0.08-0.14%, the aluminum is common aluminum, the surface gloss of the highlight aluminum oxide profile after surface treatment is 450-550, and the specific steps are as follows: 0.37 to 0.43 percent of Si, 0.08 to 0.14 percent of Fe0, less than or equal to 0.01 percent of Mn, 0.005 to 0.03 percent of Ti, less than or equal to 0.06 percent of Cu, 0.37 to 0.43 percent of Mg0.005 percent of Cr, less than or equal to 0.005 percent of Ni, less than or equal to 0.01 percent of Zn, and the balance of Al and other inevitable impurities. The invention ensures that the aluminum alloy section meets the requirements of stable subsequent bending shape, corrosion resistance, wear resistance and mechanical property, and the surface gloss is 450-550 after surface treatment, and the aluminum alloy section is used for automobile exterior trimming parts, and simultaneously the production cost is greatly reduced.
Description
Technical Field
The invention belongs to the technical field of aluminum alloy materials, and particularly relates to a highlight aluminum oxide profile for an automobile exterior trim part and a processing method thereof.
Background
At present, in the field of automobile exterior trimming parts, the basic requirement for producing the surface gloss of an aluminum oxide section is 450-550, and the aluminum oxide section is produced mainly by reducing the iron content to 0.02-0.05 percent and matching with 99.90 percent of high-purity aluminum ingots. In the popular convention of the industry, the price of the 99.90% high-purity aluminum ingot needs to be increased by 1800 plus 2000 yuan/ton on the basis of the price of common aluminum (the purity is 99.70%), and the cost of using the 99.90% high-purity aluminum ingot needs to be increased by at least more than 2 million tons of aluminum ingots required by a small-scale aluminum alloy material processing plant for one year.
Disclosure of Invention
The invention aims to solve the problems in the prior art and provide an aluminum oxide profile for automobile exterior parts, which is low in cost and has the gloss of 450-550 after surface treatment.
The purpose of the invention can be realized by the following technical scheme: the highlight aluminum oxide profile for the automobile exterior trimming parts comprises 0.08-0.14% of iron and ordinary aluminum, and the surface gloss of the highlight aluminum oxide profile is 450-550 after surface treatment.
In the highlight aluminum oxide profile for the automobile exterior trimming part, the highlight aluminum oxide profile comprises the following components in percentage by mass: 0.37 to 0.43 percent of Si, 0.08 to 0.14 percent of Fe0, less than or equal to 0.01 percent of Mn, 0.005 to 0.03 percent of Ti, less than or equal to 0.06 percent of Cu, 0.37 to 0.43 percent of Mg0.005 percent of Cr, less than or equal to 0.005 percent of Ni, less than or equal to 0.01 percent of Zn, and the balance of Al and other inevitable impurities.
According to the invention, the final gloss of the product is influenced by controlling the elements and contents of Mg, Si, Cu and the like, the Fe content is not required to be reduced, the high-purity 99.9% aluminum ingot is not required to be used, the surface gloss of the product after the aluminum profile is oxidized can reach the requirement of 450-550 by only adopting the 99.7% aluminum ingot, and the production cost is effectively reduced.
Preferably, the single element in the impurities is less than or equal to 0.01 percent, and the total mass of the impurities is less than or equal to 0.15 percent.
The invention also provides a processing method of the highlight aluminum oxide profile for the automobile exterior trimming part, which is characterized by comprising the following steps of: proportioning, processing into aluminum bars, extruding into profiles, quenching, primary aging, secondary aging and surface treatment.
In the processing method of the highlight aluminum oxide profile for the automobile exterior trimming part, the cooling rate of quenching is 500-.
In the processing method of the highlight aluminum oxide profile for the automobile exterior trimming part, the temperature of a quenching outlet is ensured to be less than or equal to 250 ℃ by adopting strong air cooling. The outlet temperature is higher in the process of extruding the profile, about 500 ℃, the influence of the extrusion quenching cooling process on the gloss of the subsequent process is controlled, and the outlet temperature is ensured to be less than or equal to 250 ℃ by adopting strong air cooling.
In the processing method of the highlight aluminum oxide profile for the automobile exterior trimming part, the temperature of primary aging is lower than the temperature of secondary aging.
Preferably, the temperature of the primary aging is 100-.
Preferably, the temperature of the secondary aging is less than or equal to 160 ℃.
The aging temperature influences the gloss of the final product, the gloss of the product after surface treatment can be effectively improved by controlling the secondary aging temperature at 160 ℃, and the time of primary aging and secondary aging is adjusted according to the mechanical property requirement of the final product.
In the processing method of the highlight aluminum oxide profile for the automobile exterior trimming part, the surface treatment comprises anodic oxidation, polishing and grinding.
In the processing method of the highlight aluminum oxide profile for the automobile exterior trimming part, the surface gloss of the aluminum profile after surface treatment is 450-550.
Compared with the prior art, the invention has the following advantages:
1. according to the invention, by optimizing the alloy components of the aluminum profile, the content of alloy elements is changed, the impurity content is reduced, and the aluminum profile with the surface gloss effect equivalent to that of 99.9% high-purity general aluminum can be obtained by using 99.7% purity aluminum ingots under the condition of not reducing the Fe content.
2. The invention replaces 99.90 percent of aluminum ingots with common aluminum for production, thereby greatly reducing the cost.
3. According to the invention, the influence of the extrusion quenching cooling process on the gloss of the subsequent process is controlled, the temperature of the quenching outlet is ensured by adopting strong air cooling, the temperature of secondary aging is controlled, the stable subsequent bending shape of the aluminum alloy section is ensured, the appearance after surface treatment meets the requirements of surface quality, corrosion resistance, wear resistance and mechanical property, and the surface gloss of the aluminum alloy section reaches 450-550, so that the aluminum alloy section can be used for automobile exterior trimming parts.
Detailed Description
The following are specific examples of the present invention and further description of the technical solutions of the present invention will be given in conjunction with the description, but the present invention is not limited to these examples.
Table 1: examples 1 to 5 Components and mass percentages of the high light alumina profiles
Example 1
The materials are mixed according to the table 1, the common aluminum ingot with the purity of 99.7 percent is adopted, the aluminum ingot is smelted and processed into an aluminum bar, then the aluminum bar is extruded into a profile, the extruded temperature is higher, the temperature of a quenching outlet is ensured to be less than or equal to 250 ℃ by adopting strong air cooling, the cooling rate of quenching is 500 ℃/min, the quenched profile is cut and then is subjected to primary aging for 2h at 100 ℃, then is subjected to secondary aging for 3h at 120 ℃, and the surface gloss of the aluminum profile is 460 after the surface is polished.
Example 2
The materials are mixed according to the table 1 and the embodiment 2, wherein, a general aluminum ingot with the purity of 99.7 percent is adopted to be smelted and processed into an aluminum bar, then the aluminum bar is extruded into a profile, the extruded temperature is higher, the temperature of a quenching outlet is ensured to be less than or equal to 250 ℃ by adopting strong air cooling, the cooling rate of quenching is 700 ℃/min, the quenched profile is cut and then is subjected to primary aging for 3h at 140 ℃, then is subjected to secondary aging for 2h at 160 ℃, and the surface gloss of the aluminum profile is 468 after the surface is polished.
Example 3
The materials are mixed according to the table 1 and the embodiment 3, wherein, a general aluminum ingot with the purity of 99.7 percent is adopted to be smelted and processed into an aluminum bar, then the aluminum bar is extruded into a profile, the extruded temperature is higher, the temperature of a quenching outlet is ensured to be less than or equal to 250 ℃ by adopting strong air cooling, the cooling rate of quenching is 600 ℃/min, the quenched profile is cut and then is subjected to primary aging for 2h at 120 ℃, then is subjected to secondary aging for 3h at 140 ℃, and the surface gloss of the aluminum profile after anodic oxidation is 516.
Example 4
The materials are mixed according to the table 1, the general aluminum ingot with the purity of 99.7 percent is adopted, the general aluminum ingot is smelted and processed into an aluminum bar, then the aluminum bar is extruded into a profile, the extruded temperature is higher, the temperature of a quenching outlet is ensured to be less than or equal to 250 ℃ by adopting strong air cooling, the cooling rate of quenching is 600 ℃/min, the quenched profile is cut and then is subjected to primary aging for 4h at 120 ℃, then is subjected to secondary aging for 2h at 150 ℃, and the surface gloss of the aluminum profile after anodic oxidation is 526.
Example 5
The materials are mixed according to the table 1, the common aluminum ingot with the purity of 99.7 percent is adopted, the aluminum bar is smelted and processed, then the aluminum bar is extruded into a profile, the extruded temperature is higher, the temperature of a quenching outlet is ensured to be less than or equal to 250 ℃ by adopting strong air cooling, the cooling rate of quenching is 550 ℃/min, the quenched profile is cut and then is subjected to primary aging for 2h at 130 ℃, then is subjected to secondary aging for 2h at 160 ℃, and the surface gloss of the aluminum profile after anodic oxidation is 545.
Example 6
The difference from example 1 is that the temperature of the outlet of the aluminum profile is 280 ℃ and the surface gloss of the aluminum profile is 441.
Example 7
The difference from the example 1 is that the temperature of the secondary aging treatment in the example is 180 ℃, and the surface gloss of the aluminum profile is 446.
In conclusion, the aluminum alloy profile has the advantages that the alloy components of the aluminum profile are optimized, the content of alloy elements is changed, the impurity content is reduced, 99.7% purity aluminum ingots are used under the condition that the Fe content is not required to be reduced, the high air cooling is adopted to ensure the quenching outlet temperature and control the secondary aging temperature, the requirements of the aluminum alloy profile on the stability of the subsequent bending shape, the corrosion resistance, the wear resistance and the mechanical property are met, the surface gloss is 450-550 after the surface treatment, the aluminum alloy profile is used for automobile exterior trimming parts, and the production cost is greatly reduced.
The technical scope of the invention claimed by the embodiments herein is not exhaustive and new solutions formed by equivalent replacement of single or multiple technical features in the embodiments are also within the scope of the invention, and all parameters involved in the solutions of the invention do not have mutually exclusive combinations if not specifically stated.
The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the invention as defined in the appended claims.
While the invention has been described in detail and with reference to specific embodiments thereof, it will be apparent to one skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope thereof.
Claims (4)
1. The highlight aluminum oxide profile for the automobile exterior trimming parts is characterized by comprising the following components in percentage by mass: 0.37-0.43% of Si, 0.08-0.14% of Fe0, less than or equal to 0.01% of Mn, 0.005-0.03% of Ti, less than or equal to 0.06% of Cu, 0.37-0.43% of Mg0.005%, less than or equal to 0.005% of Cr, less than or equal to 0.005% of Ni, less than or equal to 0.01% of Zn, and the balance of Al and other inevitable impurities, wherein the aluminum in the high-gloss aluminum oxide profile is general aluminum with the purity of 99.70%, and the surface gloss of the high-gloss aluminum oxide profile is 450-; the processing method of the highlight aluminum oxide profile for the automobile exterior trimming part comprises the following steps: preparing materials, processing into an aluminum bar, extruding into a profile, quenching, performing primary aging, performing secondary aging and performing surface treatment; the cooling rate of quenching is 500-; strong air cooling is adopted to ensure that the temperature of a quenching outlet is less than or equal to 250 ℃; the temperature of the primary aging is lower than that of the secondary aging.
2. The automotive exterior trim highlight aluminum oxide profile as claimed in claim 1, wherein the content of single element in the impurities is less than or equal to 0.01%, and the total mass of the impurities is less than or equal to 0.15%.
3. The automotive exterior trim highlight aluminum oxide profile as claimed in claim 1, wherein the temperature for one-time aging is 100-140 ℃.
4. The automotive exterior trim highlight aluminum oxide profile according to claim 1, characterized in that the temperature of secondary aging is 160 ℃ or less.
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