4results about How to "Large plastic deformation" patented technology

The invention relates to a method for strengthening the surface of a cathode roller, which is characterized in that turning, grinding, shot blasting and polishing are taken as the basis, a new machining method is formed by combining new working procedures, the coaxiality of the surface of a titanium cylinder of the machined cathode roller is less than or equal to 0.05 mm, the circle run-out degree is less than or equal to 0.05 mm, the straightness is less than or equal to 0.05 mm, and the surface roughness is less than Ra 0.3; the mirror surface effect is achieved, and surface defects such as cross grains, cross grains, chromatic aberration and bright spots are avoided; the stress corrosion resistance of the cathode roller titanium cylinder is improved, the time of surface defects in the electrolytic copper foil production process is greatly delayed, the service life of the cathode roller is prolonged, the production efficiency of the cathode roller is improved, the effect superior to that of an existing machining method is achieved, the corrosion resistance of the cathode roller is remarkably improved, and the service cycle of the cathode roller is greatly prolonged. And the product meets the use requirements of high-end copper foils with high tensile strength and high elongation. According to the method, the required equipment is high in maturity, the equipment purchase cost and the processing cost are not obviously increased, and the method has good operability and economical efficiency.

The high-fatigue inhaul cable comprises an anchor cup, a wire dividing plate, a cable body, a cold casting anchoring material and a hot casting anchoring material, the anchor cup adopts a cold and hot grading anchoring mode, a hot casting anchor is arranged at the front end of the anchor cup, a cold casting anchor is arranged at the rear end of the anchor cup, and a hot casting anchor inner cavity and a cold casting anchor inner cavity which are different in taper are formed in the anchor cup. Wherein a hot casting anchoring material and a cold casting anchoring material which are different in strength and rigidity are poured into the hot casting anchor inner cavity and the cold casting anchor inner cavity respectively, so that a cable body steel wire is connected with the anchor cup in an anchoring mode, the effect of reducing the stress of the anchoring material and the steel wire at the front end of the anchor cup is achieved, and meanwhile on the premise that the inner cone angle of the anchor cup is not reduced, the steel wire break angle in the anchor cup is reduced; bending stress of the steel wires is reduced, and fatigue life of the inhaul cable is prolonged.

The invention discloses preparation of a high-strength, high-toughness and high-elongation TZM thick plate, and relates to the technical field of alloy preparation. The method comprises the steps that preparation raw materials are obtained, and the preparation raw materials comprise Mo powder, TiH2 powder, ZrH2 powder and C powder; the preparation method comprises the following steps: crushing and grinding TiH2 powder and ZrH2 powder, and sieving to obtain sieved TiH2 powder and sieved ZrH2 powder; the TZM powder is weighed according to the chemical component proportion and mixed, 0.5% of the sieved TiH2 powder is added in batches in the mixing process, and mixed powder is obtained; performing compression molding on the mixed powder to obtain a TZM powder blank; carrying out hot pressing sintering on the TZM powder blank to obtain a TZM blank; and the TZM blank is rolled and annealed to obtain the TZM thick plate. According to the embodiment of the invention, the high-strength and high-toughness TZM thick plate is prepared through the preparation steps of staged hot pressed sintering and star-shaped rolling, and the high elongation of the TZM thick plate is realized by optimizing the preparation and rolling annealing processes of the mixed powder.

This utility model belongs to the field of seismic isolation and vibration reduction technology for bridge structures, and specifically relates to a shear energy-dissipating steel truss connecting beam for replaceable railway piers. It includes several steel truss connecting beam units, spaced apart along the height of the pier column. At the same height position, there are four steel truss connecting beam units, each positioned between adjacent pier columns. Each steel truss connecting beam unit includes horizontally arranged upper and lower chords, and at least one set of intersecting diagonal web members between the upper and lower chords. The chords are structural members designed to prevent instability of the outer web members of the pier column. The web members mainly bear axial forces and reduce seismic response by dissipating energy through tensile and compressive deformation. This structure dissipates energy through plastic deformation and yielding, thereby protecting the pier column and achieving a graded energy dissipation effect. Furthermore, the steel truss connecting beam system is easy to replace after damage, and the replaced pier can immediately resume normal use, playing an important role in post-earthquake repair and operation of bridges.