2results about How to "Control heat input" patented technology

This invention discloses an optimized method for stator and rotor welding processes in the field of motor manufacturing, comprising the following steps: improving welding quality through pretreatment, coating with modified composite materials, and optimizing laser welding parameters. During pretreatment, the stator and rotor areas to be welded are sanded with 800-1200 grit sandpaper, followed by ultrasonic cleaning with acetone or alcohol for 10-15 minutes to achieve a surface roughness Ra ≤ 1.6 μm; a 0.1-0.3 mm thick layer of modified composite material is coated onto one surface and dried at 80-120°C for 1-2 hours; laser welding is employed, with the molten pool temperature monitored at 1800-2200°C during welding; immediately after welding, the welded parts are placed in a holding furnace at 200-300°C for slow cooling for 2-4 hours, and then cooled to room temperature at a rate of 5-10°C / min. This method effectively improves the strength, toughness, and crack resistance of the welded joint, reduces the heat-affected zone, and minimizes deformation.

The invention relates to the technical field of metal welding, and discloses a high-strength tool alloy steel and ceramic composite layer welding process which comprises the following steps: quenching and tempering a substrate, processing a swallow-tail-shaped nano microstructure on a to-be-welded surface of the substrate through femtosecond laser, and then depositing a Ti layer with the thickness of 1 micron through magnetron sputtering, and carrying out heat preservation at 740-760 DEG C in a vacuum furnace for 1 hour for annealing. The contact area of a base body and the brazing filler metal is increased through the dovetail-shaped nanometer microstructure machined through femtosecond laser, a mechanical interlocking foundation is formed, the wettability and the diffusivity of an interface can be improved in cooperation with magnetron sputtering of the Ti layer and subsequent annealing treatment, and then the performance gradient transition of the four layers of gradient brazing filler metal films is achieved. In combination with Ar-H2 mixed plasma bombardment and ceramic layer precise polishing and cleaning, metallurgical reaction conditions of a brazing interface can be optimized, and meanwhile, heat input in the welding process can be controlled through synchronous scanning of the optical fiber laser and the plasma arc and a dynamic temperature feedback regulation and control mechanism.