Aluminum alloy 1080 component standard sample and preparation method thereof

Abstract

The invention discloses an aluminum alloy 1080 component standard sample and a preparation method thereof, and belongs to the technical field of metal materials. The problem that an analysis result is not representative due to the fact that existing spectrum and chemical analysis of the 1080 aluminum alloy lacks a standard sample compared with an analysis sample is solved. The aluminum alloy material is prepared from 0.081% to 0.087% of Si, 0.149% to 0.155% of Fe, 0.0095% to 0.0105% of Cu, 0.0092% to 0.0099% of Mn, 0.012% to 0.014% of Mg, 0.010% to 0.012% of Cr, 0.015% to 0.017% of Ni, 0.022% to 0.024% of Zn, 0.015% to 0.017% of Ti, 0.027% to 0.029% of V, 0.019% to 0.21% of Ga and the balance Al. The method comprises the following steps: weighing raw materials; smelting is conducted; casting is conducted; and homogenizing heat treatment. The method is used for spectrum and chemical analysis of the 1080 aluminum alloy.

Description

Technical Field

[0001] This invention belongs to the field of metal materials technology, specifically relating to a standard sample of aluminum alloy 1080 and its preparation method. Background Technology

[0002] 1080 aluminum alloy belongs to the category of industrial pure aluminum. Its core characteristic is its excellent plasticity, which allows it to adapt to various forms of pressure processing. This advantage has led to its widespread application in many fields, including billboard manufacturing, building exterior decoration, bus body construction, and the decoration and renovation of high-rise buildings and factory walls. It has become an indispensable basic material in industrial production and urban construction.

[0003] In the production and application of aluminum alloy 1080, compositional analysis is a crucial step in ensuring product quality, and direct-reading spectrometers are currently the most commonly used spectroscopic analysis equipment in this field. Existing direct-reading spectrometers are all equipped with permanent curves for the elements required for analysis. After standardization, curve correction can be achieved using only a single-point standard sample in the as-cast state. However, spectroscopic analysis has significant limitations; the presence of a third element can interfere with the analytical results. This places strict requirements on standard samples—they must be highly consistent with the sample to be analyzed in terms of composition, content, and microstructure to ensure the accuracy and reliability of the analytical results.

[0004] Meanwhile, while direct-reading spectrometer analysis offers advantages such as ease of operation and high efficiency, it is not suitable for all scenarios. When aluminum alloy 1080 products exhibit significant compositional segregation or unique shapes, the analytical results obtained using direct-reading spectrometers often lack representativeness and fail to accurately reflect the overall composition of the product. In such cases, ICP analysis becomes an important supplementary method, addressing the compositional analysis needs in these complex scenarios. However, ICP analysis also faces the problem of interference from a third element, and its accuracy relies heavily on standard samples with compositional content consistent with the sample being analyzed; otherwise, it is difficult to avoid errors caused by interference.

[0005] In summary, whether it's spectral analysis using direct-reading spectrometers or chemical analysis using ICP, the compositional analysis of Aluminum Alloy 1080 and similar aluminum alloys urgently requires standard samples that match the compositional content and microstructure of the analyzed sample as a reference. However, currently, there are no dedicated standard samples or related preparation methods suitable for the compositional analysis of Aluminum Alloy 1080 available on the domestic and international markets. This lack of effective reference during analysis leads to significant deviations and a lack of representativeness in the analytical results, seriously affecting the accuracy of quality testing for Aluminum Alloy 1080 products and hindering its standardized use and quality control in various application fields. Therefore, developing a compositional standard sample suitable for both spectral and chemical analysis of Aluminum Alloy 1080 and similar aluminum alloys has become a critical issue that urgently needs to be addressed in the industry. Summary of the Invention

[0006] The present invention aims to address the problem that existing spectral and chemical analyses of 1080 aluminum alloy lack standard samples for comparison with the analyzed samples, resulting in unrepresentative analytical results. The invention provides a standard sample of the composition of 1080 aluminum alloy and its preparation method.

[0007] A standard sample of aluminum alloy 1080 is composed of 0.081~0.087% Si, 0.149~0.155% Fe, 0.0095~0.0105% Cu, 0.0092~0.0099% Mn, 0.012~0.014% Mg, 0.010~0.012% Cr, 0.015~0.017% Ni, 0.022~0.024% Zn, 0.015~0.017% Ti, 0.027~0.029% V, 0.019~0.21% Ga, and the balance being Al.

[0008] A method for preparing a standard sample of aluminum alloy 1080 composition is completed according to the following steps:

[0009] I. Weighing: 0.081~0.087% Si, 0.149~0.155% Fe, 0.0095~0.0105% Cu, 0.0092~0.0099% Mn, 0.012~0.014% Mg, 0.010~0.012% Cr, 0.015~0.017% Ni, 0.022~0.024% Zn, 0.015~0.017% Ti, by mass percentage. 0.027~0.029%V, 0.019~0.21%Ga, and the balance Al are used for batching. Aluminum ingots, industrial pure magnesium, industrial pure zinc, industrial pure gallium, AlSi20 master alloy, AlCu40 master alloy, AlMn10 master alloy, AlFe10 master alloy, AlCr3 master alloy, AlTi5 master alloy, AlNi20 master alloy, and AlV3 master alloy are weighed as smelting raw materials.

[0010] II. Smelting: Aluminum ingots, industrial pure zinc, industrial pure gallium, AlSi20 master alloy, AlCu40 master alloy, AlMn10 master alloy, AlFe10 master alloy, AlCr3 master alloy, AlTi5 master alloy, AlNi20 master alloy, and AlV3 master alloy are added to a small smelting furnace and heated to 700~730℃. After the materials in the furnace are completely melted, a refining agent is added to remove the slag. After removing the slag, industrial pure magnesium is added to obtain an aluminum alloy solution.

[0011] III. Casting: The molten aluminum alloy is introduced into a holding furnace at 700~730℃ and argon gas is introduced. Then, aluminum titanium boron wire is added at a speed of 125mm / min for purification and refinement. After standing for 20~25min, casting is carried out to obtain aluminum alloy ingots.

[0012] 4. Place the aluminum alloy ingot in an annealing furnace for homogenization heat treatment, and then cool it at room temperature to obtain a standard sample of aluminum alloy 1080 composition.

[0013] Beneficial effects of this invention:

[0014] The aluminum alloy 1080 composition standard sample prepared by the method of this invention contains eleven elements: Si, Fe, Cu, Mn, Mg, Cr, Ni, Zn, Ti, V, and Ga. It is applicable to 1080 aluminum alloys, solving the problem of the lack of multi-element aluminum alloy spectral and chemical standard samples and corresponding preparation methods suitable for 1080 aluminum alloy materials in the domestic and international markets. This standard sample has the same composition for both spectral and chemical analysis, providing a basis for the use of modern instruments and instrument calibration. The standard sample prepared by this invention meets the requirements of GB / T 15000 "Standard Sample Working Guidelines" and YS / T 409 "Technical Specifications for Standard Samples for Non-ferrous Metal Product Analysis". It is suitable for use in the spectral and chemical analysis of 1080 aluminum alloys. Attached Figure Description

[0015] Figure 1 This is a low-magnification microstructure image of the aluminum alloy 1080 composition standard sample in the examples;

[0016] Figure 2 This is a physical image of the standard sample of aluminum alloy 1080 in the embodiments. Detailed Implementation

[0017] The technical solution of the present invention is not limited to the specific embodiments listed below, but also includes any combination of the specific embodiments.

[0018] Specific Implementation Method 1: In this implementation method, a standard sample of aluminum alloy 1080 is composed of 0.081~0.087% Si, 0.149~0.155% Fe, 0.0095~0.0105% Cu, 0.0092~0.0099% Mn, 0.012~0.014% Mg, 0.010~0.012% Cr, 0.015~0.017% Ni, 0.022~0.024% Zn, 0.015~0.017% Ti, 0.027~0.029% V, 0.019~0.21% Ga, and the balance being Al.

[0019] Specific Implementation Method Two: This implementation method differs from Specific Implementation Method One in that the standard sample of aluminum alloy 1080 is composed of 0.0813% Si, 0.150% Fe, 0.00953% Cu, 0.00924% Mn, 0.0122% Mg, 0.0103% Cr, 0.0157% Ni, 0.0223% Zn, 0.0151% Ti, 0.0274% V, 0.0194% Ga, with the balance being Al. Everything else is the same as in Specific Implementation Method One.

[0020] Specific Implementation Method Three: This implementation method differs from Specific Implementation Method One in that the aluminum alloy 1080 composition standard sample is composed of 0.0865% Si, 0.154% Fe, 0.0104% Cu, 0.00988% Mn, 0.0139% Mg, 0.0119% Cr, 0.0168% Ni, 0.0238% Zn, 0.0166% Ti, 0.0286% V, 0.207% Ga, with the balance being Al. Everything else is the same as in Specific Implementation Method One.

[0021] Specific Implementation Method Four: The preparation method of a standard sample of aluminum alloy 1080 in this implementation method is completed according to the following steps:

[0022] I. Weighing: 0.081~0.087% Si, 0.149~0.155% Fe, 0.0095~0.0105% Cu, 0.0092~0.0099% Mn, 0.012~0.014% Mg, 0.010~0.012% Cr, 0.015~0.017% Ni, 0.022~0.024% Zn, 0.015~0.017% Ti, by mass percentage. 0.027~0.029%V, 0.019~0.21%Ga, and the balance Al are used for batching. Aluminum ingots, industrial pure magnesium, industrial pure zinc, industrial pure gallium, AlSi20 master alloy, AlCu40 master alloy, AlMn10 master alloy, AlFe10 master alloy, AlCr3 master alloy, AlTi5 master alloy, AlNi20 master alloy, and AlV3 master alloy are weighed as smelting raw materials.

[0023] II. Smelting: Aluminum ingots, industrial pure zinc, industrial pure gallium, AlSi20 master alloy, AlCu40 master alloy, AlMn10 master alloy, AlFe10 master alloy, AlCr3 master alloy, AlTi5 master alloy, AlNi20 master alloy, and AlV3 master alloy are added to a small smelting furnace and heated to 700~730℃. After the materials in the furnace are completely melted, a refining agent is added to remove the slag. After removing the slag, industrial pure magnesium is added to obtain an aluminum alloy solution.

[0024] III. Casting: The molten aluminum alloy is introduced into a holding furnace at 700~730℃ and argon gas is introduced. Then, aluminum titanium boron wire is added at a speed of 125mm / min for purification and refinement. After standing for 20~25min, casting is carried out to obtain aluminum alloy ingots.

[0025] 4. Place the aluminum alloy ingot in an annealing furnace for homogenization heat treatment, and then cool it at room temperature to obtain a standard sample of aluminum alloy 1080 composition.

[0026] The effective crystallization height of the hot-top short crystallizer described in this embodiment is very small, the cooling rate of the ingot is increased, the intracrystalline structure of the ingot is finer and thinner, the liquid cavity of the ingot is shallower and the transition zone is narrower, thus the density of the ingot is increased and the chemical composition is more uniformly distributed along the cross-section of the ingot.

[0027] The aluminum ingots described in this embodiment are aluminum ingots with a purity of 99.99% or higher.

[0028] In this embodiment, boron is not used for analysis; it is only helpful for the casting process.

[0029] This implementation method employs a "semi-continuous casting with a hot-top short crystallizer + homogenization heat treatment" process: During the casting stage, argon purification and refinement of the aluminum-titanium-boron wire (addition rate of 125 mm / min), combined with a cooling water intensity of 0.07~0.09 MPa, enhance the density of the ingot. Subsequent homogenization treatment at 520~540℃ / 12h further eliminates compositional segregation. Compositional segregation and structural defects can lead to discrepancies between local and overall composition. This method uses process control to ensure a dense internal structure (free of porosity and inclusions) and uniform composition distribution in the standard sample, guaranteeing that the sampling location is representative of the entire sample and avoiding the error of "representing the whole by a single point."

[0030] Specific Implementation Method Five: This implementation method differs from Specific Implementation Method Four in that the refining agent mentioned in step two is RJ1-1 refining agent, and the addition amount is 5~6 kg / t. Everything else is the same as in Specific Implementation Method Four.

[0031] The specific composition of the RJ1-1 refining agent described in this embodiment is based on YS / T 491-2005.

[0032] Specific Implementation Method Six: This implementation method differs from Specific Implementation Method Four in that the purity of the argon gas introduced in step three is ≥99.996%, and the gas flow rate is 20 L / min. Everything else is the same as in Specific Implementation Method Four.

[0033] Specific Implementation Method Seven: This implementation method differs from Specific Implementation Method Four in that the amount of aluminum-titanium-boron wire added in step three is 1.3 kg / t. Everything else is the same as in Specific Implementation Method Four.

[0034] Specific Implementation Method Eight: This implementation method differs from Specific Implementation Method Four in that the casting in step three adopts semi-continuous "hot-top" casting, using a hot-top short crystallizer with a specification of Φ65mm and an effective height of 8~10mm, a casting temperature of 700~730℃, a casting speed of 180~200mm / min, and a cooling water intensity of 0.07~0.09MPa. Everything else is the same as in Specific Implementation Method Four.

[0035] Specific Implementation Method Nine: This implementation method differs from Specific Implementation Method Four in that the parameters for the homogenization heat treatment in step four are: homogenization temperature of 520~540℃ and holding time of 12h. Everything else is the same as in Specific Implementation Method Four.

[0036] Specific Implementation Method Ten: This implementation method differs from Specific Implementation Method Four in that the aluminum alloy 1080 composition standard sample mentioned in step four is in block or shaving form. Everything else is the same as in Specific Implementation Method Four.

[0037] The beneficial effects of the present invention are verified by the following embodiments:

[0038] Example 1: A method for preparing a standard sample of aluminum alloy 1080 composition is completed according to the following steps:

[0039] I. Weighing: Prepare the raw materials by weighing 0.0841% Si, 0.152% Fe, 0.00998% Cu, 0.00964% Mn, 0.0128% Mg, 0.0109% Cr, 0.0164% Ni, 0.0229% Zn, 0.0157% Ti, 0.0283% V, 0.0196% Ga, with the balance being Al. Weigh out aluminum ingots, industrial pure magnesium, industrial pure zinc, industrial pure gallium, AlSi20 master alloy, AlCu40 master alloy, AlMn10 master alloy, AlFe10 master alloy, AlCr3 master alloy, AlTi5 master alloy, AlNi20 master alloy, and AlV3 master alloy as smelting raw materials.

[0040] II. Smelting: Aluminum ingots, industrial pure zinc, industrial pure gallium, AlSi20 master alloy, AlCu40 master alloy, AlMn10 master alloy, AlFe10 master alloy, AlCr3 master alloy, AlTi5B0.2 master alloy, AlNi20 master alloy, and AlV3 master alloy are added to a small smelting furnace and heated to 725℃. After the materials in the furnace are completely melted, a refining agent is added to remove the slag. After removing the slag, industrial pure magnesium is added to obtain an aluminum alloy solution.

[0041] III. Casting: The molten aluminum alloy is introduced into a holding furnace at 780℃ and argon gas is introduced. Then, aluminum-titanium-boron wire is added at a speed of 125mm / min for purification and refinement. After standing for 25 minutes, casting is carried out. The casting adopts a hot-top short crystallizer with a specification of Φ65mm and an effective height of 8~10mm. The casting temperature is 714℃, the casting speed is 190mm / min, and the cooling water intensity is 0.08MPa to obtain aluminum alloy ingots.

[0042] Fourth, the aluminum alloy ingot is placed in an annealing furnace for homogenization heat treatment at a temperature of 535℃ and a holding time of 12h. Then it is cooled at room temperature to obtain a standard sample of aluminum alloy 1080 composition.

[0043] The refining agent mentioned in step two of this embodiment is model RJ1-1, and its specific composition is as specified in YS / T 491-2005. The addition amount is 5.5Kg / t.

[0044] In step three of this embodiment, argon gas is introduced: the argon gas purity is ≥99.996%, and the gas flow rate is 20L / min.

[0045] In step three of this embodiment, the amount of aluminum-titanium-boron wire added is 1.3 kg per ton of aluminum alloy solution.

[0046] The casting described in step three of this embodiment adopts semi-continuous "hot-top" casting.

[0047] In this embodiment, the standard sample of aluminum alloy 1080 was prepared by cutting off at least 250 mm from each end, and then taking 50-55 mm samples from each end and the middle portion. The microstructure of the above samples was subjected to metallographic examination strictly according to GB / T 3246.2-2012 "Deformed Aluminum and Aluminum Alloy Products - Low Magnification Microstructure Test Method". Figure 1 and Figure 2 As can be seen, the prepared standard sample has a dense internal structure and is free from defects such as pores and inclusions.

[0048] In this embodiment, the aluminum alloy 1080 composition standard sample was processed into 250-350 samples with a diameter of 55×35mm. Then, 20 samples were randomly selected, numbered sequentially, and the composition homogeneity of the spectral standard sample was checked according to the requirements of YS / T 409 "Technical Specification for Standard Samples for Analysis of Non-ferrous Metal Products". Three different parts on the cross-section of the sample were inspected on a photoelectric spectrometer, and the test results were statistically analyzed using variance to obtain the composition homogeneity data of the spectral standard sample.

[0049] The aluminum alloy 1080 composition standard sample prepared in this embodiment was processed into 1mm aluminum alloy chips. The processing parameters were as follows: milling cutter translation speed 70mm / min~100mm / min, milling cutter speed 30mm / min~40mm / min, and milling depth 7mm~10mm. The aluminum alloy chips were thoroughly mixed using the quartering method and sieved: the material under 16 mesh and the material over 32 mesh were taken. 100 bottles of chemical samples (50g / bottle) were prepared, and 20 bottles were randomly selected and numbered sequentially. The elemental content of the samples was determined according to YS / T 409 "Technical Specification for Standard Samples for Analysis of Non-ferrous Metal Products". The uniformity of the chemical standard sample composition was checked, and the detection method is shown in Table 1. The minimum sample weight for the uniformity test of the chemical standard sample composition was 0.1g. The test results were statistically analyzed using the variance method.

[0050] Table 1 Detection Methods

[0051]

[0052] Value determination analysis: 1. In accordance with GB / T 20975 "Chemical Analysis Methods for Aluminum and Aluminum Alloys", one or more accurate and reliable analytical methods are selected to conduct collaborative value determination analysis and data processing of data reported by each analytical unit; 2. The range is checked for outliers within the group according to the allowable difference in YS / T 409 "Technical Specification for Standard Samples for Analysis of Non-ferrous Metal Products". If outliers are found, the original laboratory is required to re-examine the suspicious values. The original values ​​after re-examination and elimination are summarized, and the normality of all data is tested using the Shapiro-Wilke method.

[0053] According to YS / T 409 "Technical Specification for Standard Samples for Analysis of Non-ferrous Metal Products", the average value of the data that follows a normal distribution is used as the single measurement value to form a new set of data. The Grubbs method is used for testing, and then the Cochrane method is used to test whether the data in each set are of equal precision. After processing each set of data, the arithmetic mean and standard deviation of each set of data are calculated. The number of significant figures of the standard value is rounded according to GB 8170 "Rounding Rules for Data". The resulting data are the standard values ​​and standard deviations of the aluminum alloy 1080 composition standard sample.

[0054] The standard values ​​and expanded uncertainties of the aluminum alloy chemical standard sample obtained in this embodiment are shown in Table 2, and the standard values ​​and expanded uncertainties of the aluminum alloy spectral standard sample are shown in Table 3. As can be seen from Tables 2 and 3, the standard sample prepared in this embodiment is not only applicable to the chemical analysis of 1080 aluminum alloy, but also a standard sample with the same composition as the spectral and chemical samples, providing a basis for the use of modern instruments and the calibration between instruments.

[0055] Table 2 Standard values ​​and expanded uncertainties of spectral standard samples

[0056]

[0057] Table 3 Standard values ​​and expanded uncertainties of chemical standard samples

[0058]

Claims

1. A standard sample of aluminum alloy 1080 composition, characterized in that... The standard sample of aluminum alloy 1080 consists of 0.081~0.087% Si, 0.149~0.155% Fe, 0.0095~0.0105% Cu, 0.0092~0.0099% Mn, 0.012~0.014% Mg, 0.010~0.012% Cr, 0.015~0.017% Ni, 0.022~0.024% Zn, 0.015~0.017% Ti, 0.027~0.029% V, 0.019~0.21% Ga, and the balance being Al.

2. The aluminum alloy 1080 composition standard sample according to claim 1, characterized in that... The standard sample of aluminum alloy 1080 consists of 0.0813% Si, 0.150% Fe, 0.00953% Cu, 0.00924% Mn, 0.0122% Mg, 0.0103% Cr, 0.0157% Ni, 0.0223% Zn, 0.0151% Ti, 0.0274% V, 0.0194% Ga, and the balance being Al, by mass percentage.

3. The aluminum alloy 1080 composition standard sample according to claim 1, characterized in that... The standard sample of aluminum alloy 1080 consists of 0.0865% Si, 0.154% Fe, 0.0104% Cu, 0.00988% Mn, 0.0139% Mg, 0.0119% Cr, 0.0168% Ni, 0.0238% Zn, 0.0166% Ti, 0.0286% V, 0.207% Ga, and the balance being Al.

4. The method for preparing a standard sample of aluminum alloy 1080 composition as described in claim 1, characterized in that... The preparation method for the standard sample of aluminum alloy 1080 composition is completed according to the following steps: I. Weighing: 0.081~0.087% Si, 0.149~0.155% Fe, 0.0095~0.0105% Cu, 0.0092~0.0099% Mn, 0.012~0.014% Mg, 0.010~0.012% Cr, 0.015~0.017% Ni, 0.022~0.024% Zn, 0.015~0.017% Ti, by mass percentage. 0.027~0.029%V, 0.019~0.21%Ga, and the balance Al are used for batching. Aluminum ingots, industrial pure magnesium, industrial pure zinc, industrial pure gallium, AlSi20 master alloy, AlCu40 master alloy, AlMn10 master alloy, AlFe10 master alloy, AlCr3 master alloy, AlTi5 master alloy, AlNi20 master alloy, and AlV3 master alloy are weighed as smelting raw materials. II. Smelting: Aluminum ingots, industrial pure magnesium, industrial pure zinc, industrial pure gallium, AlSi20 master alloy, AlCu40 master alloy, AlMn10 master alloy, AlFe10 master alloy, AlCr3 master alloy, AlTi5 master alloy, AlNi20 master alloy, and AlV3 master alloy are added to a small smelting furnace and heated to 700~730℃. After the materials in the furnace are completely melted, a refining agent is added to remove the slag. After the slag removal is completed, industrial pure magnesium is added to obtain an aluminum alloy solution. III. Casting: The molten aluminum alloy is introduced into a holding furnace at 700~730℃ and argon gas is introduced. Then, aluminum titanium boron wire is added at a speed of 125mm / min for purification and refinement. After standing for 20~25min, casting is carried out to obtain aluminum alloy ingots.

4. Place the aluminum alloy ingot in an annealing furnace for homogenization heat treatment, and then cool it at room temperature to obtain a standard sample of aluminum alloy 1080 composition.

5. The method for preparing a standard sample of aluminum alloy 1080 according to claim 4, characterized in that... The refining agent mentioned in step two is RJ1-1 refining agent, and the addition amount is 5~6 kg / t.

6. The method for preparing a standard sample of aluminum alloy 1080 composition according to claim 4, characterized in that... In step three, the purity of the argon gas introduced is ≥99.996%, and the gas flow rate is 20L / min.

7. The method for preparing a standard sample of aluminum alloy 1080 composition according to claim 4, characterized in that... The amount of aluminum-titanium-boron wire added in step three is 1.3 kg / t.

8. The method for preparing a standard sample of aluminum alloy 1080 composition according to claim 4, characterized in that... The casting described in step three adopts semi-continuous "hot-top" casting. The casting uses a hot-top short crystallizer with a specification of Φ65mm and an effective height of 8~10mm. The casting temperature is 700~730℃, the casting speed is 180~200mm / min, and the cooling water intensity is 0.07~0.09MPa.

9. The method for preparing a standard sample of aluminum alloy 1080 according to claim 4, characterized in that... The parameters for the homogenization heat treatment in step four are: homogenization temperature of 520~540℃ and holding time of 12h.

10. The method for preparing a standard sample of aluminum alloy 1080 according to claim 4, characterized in that... The aluminum alloy 1080 composition standard sample mentioned in step four is in the form of blocks or chips.

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