2results about How to "Uniform plastic deformation" patented technology

This invention relates to a hot-rolled wire rod for 2330MPa grade stranded wire and its manufacturing method. The method involves rolling high-carbon, high-silicon Cr-V wire rods into wire rods, followed by online molten salt isothermal toughening treatment. This process involves a pre-treatment molten salt stage followed by rapid cooling, transitioning the wire rod from an austenitic state to a sorbite phase, forming a predominantly sorbite microstructure. A subsequent molten salt stage further increases the molten salt temperature and reduces the molten salt circulation rate, promoting the continued transformation of untransformed residual austenite into sorbite and isothermal tempering, while also promoting partial melting of sorbite lamellars. Finally, the wire rod undergoes slow cooling on a roller conveyor, resulting in a hot-rolled wire rod with a microstructure consisting of tempered sorbite, ferrite, and melted sorbite. This method controls material costs, achieving a tensile strength of 1558~1608MPa and a reduction of area of ​​34%~39%, while balancing production efficiency and energy consumption. It eliminates the need for offline heat treatment, enabling efficient and stable production of ultra-high strength stranded wire.

The application discloses a process method for rivet buckling and pressure riveting of a main plate of a heat exchanger, and relates to the technical field of heat exchanger manufacturing in a new energy automobile thermal management system. A servo pressure riveting device with a longitudinal ultrasonic excitation function is adopted, a flat head sinking type pressure riveting connection is performed on the main plate and the flow channel plate after pretreatment and coating through multi-stage variable pressure control, ultrasonic energy is synchronously applied during pressure riveting, shear thinning and self-adaptive flow leveling of the pre-coated heat conduction coating medium are caused, the resident air in the microscopic rough gap of the interface is discharged, and internal residual stress is eliminated through the acoustic plastic softening effect of the material. The application has the advantages that the ultrasonic auxiliary pressure riveting process is combined with the preposition of the phase change heat conduction coating medium, the acoustic control and thermal effect of the ultrasonic wave promote the self-adaptive flow leveling of the heat conduction medium, and the air micro gap remaining in the traditional buckling riveting is completely eliminated. Quantitative comparison tests show that.