Preparation method of aluminum and aluminum alloy welding wire electrochemically plated with Zn+Cu/Re composite coating and applied to robot welding

Abstract

The invention relates to the field of welding wire manufacturing, in particular to a preparation method of an aluminum and aluminum alloy welding wire electrochemically plated with a Zn+Cu / Re composite coating and applied to robot welding. A pure aluminum or aluminum alloy wire rod is used as the matrix. Pretreatment, electrochemical plating of the Zn+Cu / Re composite coating and post-treatment areconducted on the surface. The electrochemically plated Zn+Cu / Re composite coating has the functions of reducing welding smoke, improving the porosity resistance of the welding wire and improving solid lubrication and meanwhile fills up pits in the surface of the welding wire matrix, and the electric conductivity and surface quality of the welding wire are improved; the bonding force and strengthof the Zn+Cu / Re composite coating are high, the aluminum or copper peeling phenomenon is avoided, the Zn+Cu / Re composite coating is high in compactness, good in rust resistance and resistant to wear,Zn can reduce welding smoke and splashes, and Re can refine plating layer crystals and reduce the void ratio; and meanwhile, molten bath stirring is enhanced, a molten bath is purified, crystals are refined, pores on the surface and on the inner portion of a welding joint are thoroughly eradicated, and the porosity resistance of the welding wire is improved.

Description

technical field

[0001] The invention relates to the field of welding wire manufacturing, in particular to a method for preparing electrodeposited Zn+Cu / Re composite coating aluminum and aluminum alloy welding wire for robots. technical background

[0002] Due to the advantages of low density, small specific gravity, high electrical and thermal conductivity, good casting and machining performance, aluminum and aluminum alloys have been widely used in aviation, aerospace, vehicles, ships, electrical appliances, construction and chemical industries. With the development of industrial automation, most aluminum and aluminum alloy components need to be welded by advanced robots. Therefore, higher requirements are put forward for the surface quality and welding performance of aluminum and aluminum alloy welding wires.

[0003] In the manufacturing process of existing aluminum and aluminum alloy welding wire, the surface oxide skin is usually removed by mechanical scraping, but the...

Examples

Embodiment 1

[0019] A preparation method of welding wire for aluminum and aluminum alloy robots with electrochemical Zn+Cu composite coating, the substrates are respectively SA1 4043 and SA1 5356 aluminum alloy wire rods, wherein the diameter of the wire rods is 9.5 mm, and the specific preparation steps are as follows:

[0020] (1) Pre-treatment includes ultrasonic + lye degreasing treatment, 2 high-pressure cold water rinses, ultrasonic + activation solution to remove oxide film, 2 high-pressure cold water rinses, completely remove grease, scale and oxide film on the surface of the wire rod, and make the substrate clean active crystal surface. Wherein, the lye is composed of 45g / L sodium hydroxide, 60g / L sodium carbonate, 56g / L sodium phosphate, 20g / L sodium silicate, 5g / L sodium pyrophosphate and tap water, and the degreasing reaction temperature is 60°C. The reaction time is 240s; the activation solution is composed of 500ml / L nitric acid and tap water, the reaction temperature for deo...

Embodiment 2

[0024] A preparation method of electrodeposited Zn+Cu / Re composite coating aluminum and aluminum alloy welding wire for robots. The substrates are respectively SA1 4043 and SA1 5356 aluminum alloy wire rods, wherein the diameter of the wire rod is 6.5 mm. The specific preparation steps as follows:

[0025](1) Pre-treatment includes ultrasonic + lye degreasing treatment, 2 high-pressure cold water rinses, ultrasonic + activation solution to remove oxide film, 2 high-pressure cold water rinses, completely remove grease, scale and oxide film on the surface of the wire rod, and make the substrate clean active crystal surface. Wherein, the lye is composed of 30g / L sodium hydroxide, 25g / L sodium carbonate, 40g / L sodium phosphate, 25g / L sodium silicate, 10g / L sodium pyrophosphate and tap water, and the degreasing reaction temperature is 60°C. The reaction time is 180s; the activation solution is composed of 400ml / L nitric acid and tap water, the reaction temperature for deoxidation ...

Embodiment 3

[0029] A preparation method of electrodeposited Zn+Cu / Re composite coating aluminum and aluminum alloy welding wire for robots. The substrates are respectively SA1 4043 and SA1 5356 aluminum alloy wire rods, wherein the diameter of the wire rods is 2.5 mm. Specific preparation steps as follows:

[0030] (1) Pre-treatment includes ultrasonic + lye degreasing treatment, 2 high-pressure cold water rinses, ultrasonic + activation solution to remove oxide film, 2 high-pressure cold water rinses, completely remove grease, scale and oxide film on the surface of the wire rod, and make the substrate clean active crystal surface. Wherein, the lye is composed of 15g / L sodium hydroxide, 20g / L sodium carbonate, 50g / L sodium phosphate, 30g / L sodium silicate, 15g / L sodium pyrophosphate and tap water, and the degreasing reaction temperature is 60°C. The reaction time is 90s; the activation solution is composed of 300ml / L nitric acid and tap water, the reaction temperature for deoxidation fil...

technical field

[0001] The invention relates to the field of welding wire manufacturing, in particular to a method for preparing electrodeposited Zn+Cu / Re composite coating aluminum and aluminum alloy welding wire for robots. technical background

[0002] Due to the advantages of low density, small specific gravity, high electrical and thermal conductivity, good casting and machining performance, aluminum and aluminum alloys have been widely used in aviation, aerospace, vehicles, ships, electrical appliances, construction and chemical industries. With the development of industrial automation, most aluminum and aluminum alloy components need to be welded by advanced robots. Therefore, higher requirements are put forward for the surface quality and welding performance of aluminum and aluminum alloy welding wires.

[0003] In the manufacturing process of existing aluminum and aluminum alloy welding wire, the surface oxide skin is usually removed by mechanical scraping, but the...

Examples

Embodiment 1

[0019] A preparation method of welding wire for aluminum and aluminum alloy robots with electrochemical Zn+Cu composite coating, the substrates are respectively SA1 4043 and SA1 5356 aluminum alloy wire rods, wherein the diameter of the wire rods is 9.5 mm, and the specific preparation steps are as follows:

[0020] (1) Pre-treatment includes ultrasonic + lye degreasing treatment, 2 high-pressure cold water rinses, ultrasonic + activation solution to remove oxide film, 2 high-pressure cold water rinses, completely remove grease, scale and oxide film on the surface of the wire rod, and make the substrate clean active crystal surface. Wherein, the lye is composed of 45g / L sodium hydroxide, 60g / L sodium carbonate, 56g / L sodium phosphate, 20g / L sodium silicate, 5g / L sodium pyrophosphate and tap water, and the degreasing reaction temperature is 60°C. The reaction time is 240s; the activation solution is composed of 500ml / L nitric acid and tap water, the reaction temperature for deo...

Embodiment 2

[0024] A preparation method of electrodeposited Zn+Cu / Re composite coating aluminum and aluminum alloy welding wire for robots. The substrates are respectively SA1 4043 and SA1 5356 aluminum alloy wire rods, wherein the diameter of the wire rod is 6.5 mm. The specific preparation steps as follows:

[0025](1) Pre-treatment includes ultrasonic + lye degreasing treatment, 2 high-pressure cold water rinses, ultrasonic + activation solution to remove oxide film, 2 high-pressure cold water rinses, completely remove grease, scale and oxide film on the surface of the wire rod, and make the substrate clean active crystal surface. Wherein, the lye is composed of 30g / L sodium hydroxide, 25g / L sodium carbonate, 40g / L sodium phosphate, 25g / L sodium silicate, 10g / L sodium pyrophosphate and tap water, and the degreasing reaction temperature is 60°C. The reaction time is 180s; the activation solution is composed of 400ml / L nitric acid and tap water, the reaction temperature for deoxidation ...

Embodiment 3

[0029] A preparation method of electrodeposited Zn+Cu / Re composite coating aluminum and aluminum alloy welding wire for robots. The substrates are respectively SA1 4043 and SA1 5356 aluminum alloy wire rods, wherein the diameter of the wire rods is 2.5 mm. Specific preparation steps as follows:

[0030] (1) Pre-treatment includes ultrasonic + lye degreasing treatment, 2 high-pressure cold water rinses, ultrasonic + activation solution to remove oxide film, 2 high-pressure cold water rinses, completely remove grease, scale and oxide film on the surface of the wire rod, and make the substrate clean active crystal surface. Wherein, the lye is composed of 15g / L sodium hydroxide, 20g / L sodium carbonate, 50g / L sodium phosphate, 30g / L sodium silicate, 15g / L sodium pyrophosphate and tap water, and the degreasing reaction temperature is 60°C. The reaction time is 90s; the activation solution is composed of 300ml / L nitric acid and tap water, the reaction temperature for deoxidation fil...

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