46results about How to "Reduce hydrogen embrittlement" patented technology

The invention discloses a method for preparing a high-silicon silicon steel strip by an electric brush composite plating method. A pure iron strip, a low-carbon steel strip or a low-silicon silicon steel strip is used as a cathode plated strip, and an anode plate is plated by an electric brush. As the anode, a layer of iron-iron-silicon particle composite coating is covered on the cathodic plating thin strip through the brush composite silicon plating process to form a composite coated steel strip with the core as the steel strip matrix, and then perform uniform diffusion heat treatment to make the iron - The silicon-containing particles in the composite coating of ferrosilicon particles are uniformly diffused into the steel strip matrix at the core, thereby continuously preparing high-silicon steel thin strips. The invention also discloses a silicon steel strip continuous preparation device, which includes an unwinding guiding device, a conveying device, an electroplating device, a diffusion heat treatment device and a winding device. In the invention, the high-silicon silicon steel strip with excellent magnetic properties is obtained by electroplating the high-silicon coating on the cathode-plated thin strip, and then undergoing a heat treatment process. The method is simple to operate, has the characteristics of high efficiency and continuous preparation, and can greatly reduce the preparation cost.

The invention relates to a super-large-diameter steel strand for a mine anchor cable and a manufacturing method thereof. The steel strand adopts a 1×19-wire Waringon structure, 19 wires are twisted at one time, and the twist distance is 13.5 times. The diameter of the wire is 7.74mm, the diameter of the outer thick wire is 8.01mm, the diameter of the outer thin wire is 6.07mm, the diameter of the inner wire is 7.43mm, the nominal diameter of the steel strand is 34.6mm, and the upper deviation of the nominal diameter is +0.40 mm, the lower deviation of the nominal diameter is ‑0.15mm; the manufacturing method includes: selection of wire rods → inspection, testing → pickling, phosphating → inspection → drawing → semi-finished product inspection, testing → stranding → stabilization treatment → layer winding → Finished product inspection and testing → packaging → storage. The invention makes the measured diameter of the twisted steel strand reach 34.8mm through four kinds of diameters of wires, and the structure of the steel strand is tight and not loose, which meets the size requirement of the super-large diameter steel strand.

The invention discloses a continuous chromeplating device and method for a large rod. A through hole allowing rods to pass through is formed in an electroplating bath; a front support and a rear support are arranged at two ends of the electroplating bath; a front follow-up electric conduction frame is arranged above the front support; a rear follow-up electric conduction frame is arranged above the rear support; a rotary sanding device is arranged between the front follow-up electric conduction frame and the electroplating bath; and a transitional protection device is arranged between the rotary sanding device and the electroplating bath. The continuous chromeplating method comprises the following steps: first, cleaning and degreasing; second, sanding directly after cleaning and degreasing; third, spraying a transitional protection liquid after sanding; and fourth, entering the electroplating bath and electroplating continuously. According to the steps, continuous chromeplating for a large hydraulic cylinder piston rod is achieved; the rotary sanding device is adopted, so that floated rust and passivation layers can be eliminated effectively, and the binding force of the plated layer is enhanced; the method of cleaning with an organic solvent is used, so that the risk of floated rust generation is avoided; an acid pickling process is canceled, so that hydrogen embrittlement can be reduced; and the transitional protection process avoids regeneration of floated rust and passivation layers before plating.

The invention discloses an acid-washing corrosion-inhibiting fog inhibitor which comprises the following components by weight: 15-25% of ethanol, 10-18% of isopropanol, 15-25% of hydrazine hydrate, 2-8% of an M promoter, 8-15% of a surfactant and the balance water. The preparation method of the acid-washing corrosion-inhibiting fog inhibitor comprises: adding the components into a reaction vessel according to priority and stirring to obtain the acid-washing corrosion-inhibiting fog inhibitor. The acid-washing corrosion-inhibiting fog inhibitor provided by the invention has corrosion inhibition rate of 98.5% or more and fog inhibition rate of 90% or more.