A cladding method for wear-resistant coating on the surface of magnesium-based alloy

Abstract

The invention discloses a cladding method for a magnesium-based alloy surface wear-resistant coating. The cladding method comprises the following steps: (1) pre-treating the surface of a workpiece; (2) taking a magnesium-based alloy as a cladding base body and taking a ceramic hard alloy as an electrode, wherein the electrode is a rotary electrode and the rotary speed is 2700-3000r / min; the diameter of the electrode is phi8mm-phi10mm and the elongation of the electrode is 10mm-30mm; utilizing hot cladding equipment to treat under the protection of inert gas, wherein the cladding parameters are as follows: the cladding power is 4000W-6000W, the cladding voltage is 280V-380V and the cladding frequency is 2500HZ-3000HZ; (3) enabling the electrode and the base body to be in surface contact and machining the electrode by adopting a spiral reciprocating type machining manner; and (4) obtaining the product with the following parameters: the rigidity of a cladding layer is 1700HV-1900HV and the thickness of the cladding layer is 210-230 microns. The cladding method for the magnesium-based alloy surface wear-resistant coating adopts a cladding technology to prepare the wear-resistant cladding layer; the prepared cladding layer and the magnesium-based alloy base body are in metallurgical bonding; the bonding strength is high and the rigidity and the wear resistance of the cladding layer are good.

Description

technical field [0001] The invention relates to the technical field of metal surface coating preparation, in particular to a cladding method for a wear-resistant coating on the surface of a magnesium-based alloy. Background technique [0002] Wear and corrosion problems commonly exist in various fields of industrial production. Once wear and other damage occurs on the surface of the material, the performance of the material will drop sharply, the service life of the equipment or parts will decrease, and the shutdown will cause serious economic losses. The currently used EDM deposition technology, due to the thin deposition layer (within 10-30 μm), is restricted by the technology’s own conditions and cannot prepare thick coatings. Even if the deposition is repeated, the deposition layer cannot be thickened, because the electrode rod is The anode, the workpiece to be processed is the cathode. When the coating is deposited on the workpiece, the surface of the workpiece and the ...

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Problems solved by technology

[0002] Wear and corrosion problems are common in all fields of industrial production. Once wear and other damage occurs on the surface of the material, the performance of the material will drop sharply, the service life of the equipment or parts will decrease, and the shutdown will cause serious economic losses.

The currently used EDM deposition technology, due to the thin deposition layer (within 10-30 μm), is restricted by the technology itself and cannot prepare thick coatings. Even if the deposition is repeated, the deposition layer cannot be thickened, because the electrode rod is Anode, the workpiece to be processed is the cathode. When the coating is deposited on the workpiece, the surface of the workpiece and the electrode rod are both anodes, which cannot form a battery circuit, so the deposition cannot be done, and repeated deposition is invalid

Therefore, the EDM technology is only suitable for workpieces with less severe abrasion, and is not suitable for severely abrasive surfaces.

In addition, EDM deposition is formed by the accumulation of countless dense discharge points. It is a linear processing method. The electric shock rod is in point contact with the substrate. The process is accompanied by vibration, so the coating is discontinuous, uneven, and not dense.

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