Method for manufacturing high-strength magnesium alloy solder wire

Abstract

The invention relates to a preparation method of a high-intensity magnesium alloy soldering wire, which adopts alloy agent magnesium, aluminum, zinc, yttrium, magnesium-manganese intermediate alloy and aluminium-silicon intermediate alloy as raw materials. In a vertical melting furnace, through being melted at 700 DEG C, rare-earth element yttrium is added at 800 DEG C and is refined at 760 DEG C, with a covering agent and a refine agent being added, through constant temperature, thermal retardation and stewing, then magnesium alloy molten liquid is made; through casting a mould, magnesium alloy ingot is made; through cooling, cutting and forming, and then thermoplastic extruding, in the end, the high-intensity magnesium alloy soldering wire is made; the yttrium element, the magnesium-manganese intermediate alloy and aluminium-silicon intermediate alloy can greatly improve the intensity, the malleability and the solderability of the magnesium alloy soldering wire; the preparation technology is refined, the mixture ratio is reasonable, the environment pollution does not exist; the outcome of a magnesium alloy soldering wire metallic phase has uniform structure and good compactability, the average grain size is 25microns, the tensile strength can reach 330MPa, the elongation percentage can reach 25 percent and can be improved by 18 to 28 percent compared with the prior art, and the solderability is good.

Description

technical field [0001] The invention relates to a preparation method of high-strength magnesium alloy welding wire, which belongs to the technical field of smelting, ingot casting and wire making of nonferrous metal light alloy welding wire. Background technique [0002] Magnesium alloy is the lightest alloy among non-ferrous metal alloys. Due to its active chemical properties, low melting point and boiling point, its mechanical properties are not stable enough, its strength is low, and its toughness is poor, which greatly limits its application in the industrial field. [0003] Magnesium alloy materials and their products are often used in aviation, aerospace, and electronic industries. Welding methods are often used in the production of magnesium alloy products to weld similar magnesium alloy parts into magnesium alloy products of various shapes. Magnesium alloy products In welding, due to its low mechanical properties and unstable chemical properties, the welding parts of...

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Problems solved by technology

[0002] Magnesium alloy is the lightest alloy among non-ferrous metal alloys. Due to its active chemical properties, low melting point and boiling point, its mechanical properties are not stable enough, its strength is low, and its toughness is poor, which greatly limits its application in the industrial field.

[0003] Magnesium alloy materials and their products are often used in aviation, aerospace, and electronic industries. Welding methods are often used in the production of magnesium alloy products to weld similar magnesium alloy parts into magnesium alloy products of various shapes. Magnesium alloy products In welding, due to its low mechanical properties and unstable chemical properties, the welding parts of magnesium alloys are often not ideal. Difficult to grasp, the composition design of high-strength magnesium alloy welding wire is difficult, and the forming is difficult to control, which makes the welding process poor in stability and difficult to grasp, which seriously affects the quality of magnesium alloy welded joints

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