2results about How to "Improve form factor" patented technology

The present invention relates to a controlled pulse perforation plasma arc-non-axisymmetric rotating tungsten arc combined welding method. The welding system based on it includes a PAW and NAR-GTAW combined welding gun system, a wire feeding device, and an acquisition and control system. The method includes: the NAR-GTAW welding gun and the PAW welding gun are both fixed on a movable carriage, the angle between the welding wire and the tungsten electrode is 30° to 60°, the PAW welding gun forms an angle of 2° to 5° with the vertical direction of the workpiece, and the movable carriage is adjusted so that both welding guns are located at the exact center of the groove or welding position, and the PAW welding gun is first used for base welding, and the NAR-GTAW welding gun is used for cap welding on the basis of the base welding. The present invention combines the advantages of the two welding methods by combining PAW and NAR-GTAW, effectively solves the problems of surface pores and undercuts that are prone to occur in plasma arc welding technology, eliminates welding defects, beautifies the weld surface, and ensures welding quality.

This invention relates to the field of magnesium alloy smelting technology, and in particular to a smelting process and apparatus for a semi-solid non-dendritic slurry of rare earth AS-based magnesium alloy. Using AS magnesium alloy as the base material and a Ce-La-Nd ternary rare earth mixture as the rare earth modifier, the process involves vacuum melting, electromagnetic stirring, and stepped cooling to obtain an ingot. A three-dimensional curve is plotted based on the JMAK equation to determine the critical temperature. Using a rheological casting apparatus, through internal cooling gradient, stirring-assisted slurry preparation, and ultrasonic-assisted isothermal treatment, combined with three-level quality judgment and defect closed-loop adjustment, a slurry with controllable liquid phase content, fine and rounded grains, and uniform rare earth distribution is prepared. The process exhibits high repeatability and meets the requirements of high-end semi-solid forming.