Preparation method of 5356 aluminum alloy welding wire

Abstract

The invention relates to a preparation method of a 5356 aluminum alloy welding wire, and belongs to the technical field of welding materials. According to the method, burdening is carried out according to the components of the aluminum alloy welding wire, and the aluminum alloy welding wire comprises the following chemical components in percentage by mass: less than or equal to 0.25% of Si, 4.5-5.6% of Mg, less than or equal to 0.05% of Cu, 0.1-0.2% of Mn, less than 0.2% of Zn, 0.07-0.15% of Ti, 0.15% of other inevitable impurities and the balance of Al; al is averagely divided into two parts, one part of Al is added and heated to be in a molten state, when the temperature of a smelting furnace is increased to 860-900 DEG C, other components are all added into molten aluminum, stirring is conducted for 3-5 minutes, then the temperature is increased to 950 DEG C, and heat preservation is conducted for 30 minutes; and adding the other half of the Al liquid into the obtained melt, degassing, refining and purifying the melt, then continuously casting, continuously rolling, drawing, scraping, cleaning, polishing, drying and packaging. The prepared aluminum alloy welding wire has good weldability and excellent wear resistance, and the welding stability is superior to that of imported welding wires.

Description

Technical Field

[0001] The invention relates to a preparation method of a 5356 aluminum alloy welding wire, belonging to the technical field of welding materials. Background Art

[0002] Since the new century, while the growth of output in China's aluminum processing industry has slowed significantly, the phenomenon of homogeneous competition in the industry has become increasingly serious, operating costs have continued to rise, and economic benefits have also declined significantly. The industry is facing an urgent need to shift from high-speed growth to high-quality development. This has forced Yunnan's aluminum industry to transform from its original low-value-added aluminum ingot processing to the trend of diversified product research and development and production.

[0003] At present, with the development of welding technology, aluminum and aluminum alloy welded structural parts have been widely used in the transportation industry. Especially in recent years, with the rapid development of high-speed rail, automobiles and high-speed ships, high speed, light weight and safety have become important symbols of modern transportation. Aluminum alloy has become the preferred material for lightweight due to its high specific strength and cost-effectiveness, corrosion resistance and excellent weldability. After the welding substrate and welding process are selected, the performance of the welded structure mainly depends on the quality of the welding wire. For most aluminum alloy test plates, in order to obtain welding joints with better comprehensive performance, ER5356 welding wire is generally used. However, the current high-quality ER5356 welding wire has problems in both quality and surface quality. Summary of the invention

[0004] The object of the present invention is to provide a method for preparing a 5356 aluminum alloy welding wire, wherein the obtained aluminum alloy welding wire not only has good weldability and excellent wear resistance, but also has better welding stability than imported welding wire, and specifically comprises the following steps:

[0005] (1) Ingredients: Ingredients are prepared according to the composition of the aluminum alloy welding wire, wherein the required alloy components are accurately weighed, placed in a drying oven for drying, and packaged in a plastic bag; the chemical composition and mass percentage of the aluminum alloy welding wire are: Si≤0.25%, Mg: 4.5-5.6%, Cu≤0.05%, Mn: 0.1-0.2%, Zn<0.2%, Ti: 0.07-0.15%, other unavoidable inclusions 0.15%, and the balance is Al;

[0006] (2) Melting and heat preservation: Divide Al into two parts, add one part of Al and heat it to a molten state. When the melting furnace temperature rises to 860-900°C, add all other components to the aluminum liquid and stir for 3-5 minutes, then heat it to 950°C and keep it warm for 30 minutes;

[0007] (3) Furnace refining: adding the other half of the Al liquid to the melt obtained in step (2) to perform degassing, refining and melt purification;

[0008] (4) Continuous casting: The molten alloy after smelting and refining is cast into ingots with a diameter of 78 to 82 mm at a casting temperature of;

[0009] (5) Continuous rolling: rolling to φ8-12 mm wire billet through multiple hot rolling passes and winding, and then rolling to φ2-3 mm through multiple cold rolling passes;

[0010] (6) Wire drawing: After multiple drawing passes, the φ2-3mm rod is drawn into φ1.2mm;

[0011] (7) Scraping: The aluminum alloy welding wire after drawing is passed through a scraping die, and then cleaned, polished and dried. The dried aluminum alloy welding wire is wound onto a packaging mold. The obtained welding wire is surface treated and then quickly packaged.

[0012] Preferably, the pouring temperature in step (4) of the present invention is 860-900°C.

[0013] Preferably, in step (5) of the present invention, the hot rolling is performed for 12-15 passes, and the cold rolling is performed for 24-30 passes.

[0014] Preferably, the drawing in step (6) of the present invention is performed in 8-12 passes.

[0015] Preferably, the tolerance during the scraping process in step (7) of the present invention is ±0.003 mm, and the scraping rate is 4 m / s.

[0016] Beneficial effects of the present invention: The 5356 aluminum alloy welding wire prepared by the above method has good weldability and excellent wear resistance, and its stability during welding is better than that of imported 5356 aluminum alloy welding wire. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is the welded joint between the welding wire in Example 1 and 6061 base material after welding.

[0018] Figure 2 This is the metallographic structure diagram of the welded joint between the welding wire of Example 1 and the 6061 base material after welding. DETAILED DESCRIPTION

[0019] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments, but the protection scope of the present invention is not limited to the contents described.

[0020] Example 1

[0021] A method for preparing a 5356 aluminum alloy welding wire specifically comprises the following steps:

[0022] (1) Ingredients: The ingredients are prepared according to the weight percentage of each component of the aluminum alloy welding wire, wherein the required alloy components are accurately weighed, placed in a drying oven for drying, and packaged in a plastic bag; the chemical composition and percentage composition of the aluminum alloy welding wire are: Si: 0.25%, Mg: 5.2%, Cu: 0.04%, Mn: 0.18%, Zn: 0.14%, Ti: 0.12%, other unavoidable inclusions 0.15%, and the balance is Al; the purity of each component is above 99wt%.

[0023] (2) Melting and heat preservation: Divide Al into two parts, add one part of Al and heat it to a molten state. When the melting furnace temperature rises to 880℃, add all other components to the aluminum liquid and stir for 3-5 minutes, then heat it to 950℃ and keep it warm for 30 minutes.

[0024] (3) Furnace refining: Add the other half of the Al liquid to the melt obtained in step (2) for degassing, refining and melt purification.

[0025] (4) Continuous casting: The molten alloy after smelting and refining is cast into an ingot of φ80 mm at a casting temperature of 880°C.

[0026] (5) Continuous rolling: The wire billet is rolled to about φ10mm through 13 passes of hot rolling and then wound, and then rolled to φ2-3mm through 27 passes of cold rolling.

[0027] (6) Wire drawing: After 10 drawing passes, the φ2-3mm rod is drawn into φ1.2mm.

[0028] (7) Scraping: The drawn aluminum alloy welding wire is passed through the scraping die with a scraping rate of 4 m / s and a tolerance of ±0.003 mm.

[0029] (8) Cleaning and polishing: The aluminum alloy welding wire after light rolling is ultrasonically cleaned in an ultrasonic water tank.

[0030] (9) Drying: Dry the cleaned aluminum alloy welding wire with hot air.

[0031] (10) Layer winding (rod cutting): The dried aluminum alloy welding wire is wound onto the packaging mold.

[0032] (11) Inspection and packaging: After the welding wire is surface treated, it is quickly packaged.

[0033] The welding wire prepared in this embodiment has good weldability, excellent wear resistance, uniform metallographic structure, and better stability during welding than imported 5356 aluminum alloy welding wire.

[0034] Example 2

[0035] A method for preparing a 5356 aluminum alloy welding wire specifically comprises the following steps:

[0036] (1) Ingredients: The ingredients are prepared according to the weight percentage of each component of the aluminum alloy welding wire, wherein the required alloy components are accurately weighed, placed in a drying oven for drying, and packaged in a plastic bag; the chemical composition and percentage composition of the aluminum alloy welding wire are: Si: 0.18%, Mg: 4.5%, Cu: 0.03%, Mn: 0.18%, Zn: 0.18%, Ti: 0.10%, other unavoidable inclusions 0.15%, and the balance is Al; the purity of each component is above 99wt%.

[0037] (2) Melting and heat preservation: Divide Al into two parts, add one part of Al and heat it to a molten state. When the melting furnace temperature rises to 880℃, add all other components to the aluminum liquid and stir for 3-5 minutes, then heat it to 950℃ and keep it warm for 30 minutes.

[0038] (3) Furnace refining: Add the other half of the Al liquid to the melt obtained in step (2) for degassing, refining and melt purification.

[0039] (4) Continuous casting: The molten alloy after smelting and refining is cast into an ingot of φ80 mm at a casting temperature of 880°C.

[0040] (5) Continuous rolling: The wire billet is rolled to about φ10mm through 13 passes of hot rolling and then wound, and then rolled to φ2-3mm through 27 passes of cold rolling.

[0041] (6) Wire drawing: After 10 drawing passes, the φ2-3mm rod is drawn into φ1.2mm.

[0042] (7) Scraping: The drawn aluminum alloy welding wire is passed through the scraping die with a scraping rate of 4 m / s and a tolerance of ±0.003 mm.

[0043] (8) Cleaning and polishing: The aluminum alloy welding wire after light rolling is ultrasonically cleaned in an ultrasonic water tank.

[0044] (9) Drying: Dry the cleaned aluminum alloy welding wire with hot air.

[0045] (10) Layer winding (rod cutting): The dried aluminum alloy welding wire is wound onto the packaging mold.

[0046] (11) Inspection and packaging: After the welding wire is surface treated, it is quickly packaged.

[0047] The welding wire prepared in this embodiment has good weldability and excellent wear resistance, and its stability during welding is better than that of imported 5356 aluminum alloy welding wire.

Claims

1. A method for preparing 5356 aluminum alloy welding wire, characterized in that: The specific steps include: (1) Ingredients: Ingredients are prepared according to the composition of the aluminum alloy welding wire, wherein the required alloy components are accurately weighed, placed in a drying oven for drying, and packaged in a plastic bag; the chemical composition and mass percentage of the aluminum alloy welding wire are: Si≤0.25%, Mg: 4.5-5.6%, Cu≤0.05%, Mn: 0.1-0.2%, Zn<0.2%, Ti: 0.07-0.15%, other unavoidable inclusions 0.15%, and the balance is Al; (2) Melting and heat preservation: Divide Al into two parts, add one part of Al and heat it to a molten state. When the melting furnace temperature rises to 860-900°C, add all other components to the aluminum liquid and stir for 3-5 minutes, then heat it to 950°C and keep it warm for 30 minutes; (3) Furnace refining: adding the other half of the Al liquid to the melt obtained in step (2) to perform degassing, refining and melt purification; (4) Continuous casting: The molten alloy after smelting and refining is cast into ingots with a diameter of 78 to 82 mm at a casting temperature of; (5) Continuous rolling: rolling to φ8-12 mm wire billet through multiple hot rolling passes and winding, and then rolling to φ2-3 mm through multiple cold rolling passes; (6) Wire drawing: After multiple drawing passes, the φ2-3mm rod is drawn into φ1.2mm; (7) Scraping: The aluminum alloy welding wire after drawing is passed through a scraping die, and then cleaned, polished and dried. The dried aluminum alloy welding wire is wound onto a packaging mold. The obtained welding wire is surface treated and then quickly packaged.

2. The method for preparing the 5356 aluminum alloy welding wire according to claim 1, characterized in that: The pouring temperature in step (4) is 860-900°C.

3. The method for preparing the 5356 aluminum alloy welding wire according to claim 1, characterized in that: In step (5), the hot rolling is performed for 12 to 15 passes, and the cold rolling is performed for 24 to 30 passes.

4. The method for preparing the 5356 aluminum alloy welding wire according to claim 1, characterized in that: In step (6), the drawing is performed in 8-12 passes.

5. The method for preparing the 5356 aluminum alloy welding wire according to claim 1, characterized in that: The tolerance during the scraping process in step (7) is ±0.003 mm, and the scraping rate is 4 m / s.

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