▎ 摘　　要

NOVELTY - Method for in-situ growth of graphene on the surface of plasma alloyed contact by laser involves (S1) preparing a raw material composition according to the target composition, and using a plasma alloying process to introduce metal nickel, in the alloying process, the current is 100-200 A, the arcing height of the plasma gun is 2.5-3.5 mm, and the scanning speed is 200-500 mm/minutes, and (S2) pre-coating a solid carbon source on the surface of the nickel/copper contact material, and then using laser heating to grow graphene in situ, the laser power is 2000-6000 W, the spot diameter is 50-500 ~mm, the laser power is 1500-5500 W, and the scanning speed is 1-50 mm/second. USE - The method enables in-situ growth of graphene used in high-voltage direct current air switch (claimed). ADVANTAGE - The method enables fully exerting high strength of fully covered graphene film, ablation resistance, excellent performance of ultra-high young modulus, tightly combined with the metal substrate, and characteristic of zero friction, making it have super-high anti-friction ability, providing reliable corrosion resistance and wear resistance for metal, which can greatly improve the service performance and service life of the contact material. The micron-sized nickel powder, copper powder, using plasma spraying process can better fuse, the component is more uniform, can obtain the high quality of the alloying contact material, and the copper alloy commonly used in the high voltage field is the set 5 copper alloy. The method can improve the use performance of the current copper-based contact material on the market. DETAILED DESCRIPTION - Method for in-situ growth of graphene on the surface of plasma alloyed contact by laser involves (S1) preparing a raw material composition according to the target composition, and using a plasma alloying process to introduce metal nickel, in the alloying process, the current is 100-200 A, the arcing height of the plasma gun is 2.5-3.5 mm, and the scanning speed is 200-500 mm/minutes, the feeding rate is 15-30 g/minutes, and the nickel/metal material melt is deposited by multi-layer reciprocating spray deposition under the protection of protective gas, and each layer has a thickness of 1.5-2.0 mm, spraying under the carrying effect of ion gas and protective gas, depositing on the substrate, and finally prepared nickel/copper contact material through plasma alloying, and (S2) pre-coating a solid carbon source on the surface of the nickel/copper contact material, and then using laser heating to grow graphene in situ, the laser power is 2000-6000 W, the spot diameter is 50-500 ~mm, the laser power is 1500-5500 W, and the scanning speed is 1-50 mm/second.