44results about How to "Hardness effect" patented technology

The invention belongs to the technical field of motor casting and particularly relates to a high-creep-ratio and high-strength hydraulic motor body shell blank casting technology. A creeping device isincluded and comprises a rotating rod, a rotating block, an isolation mechanism and a scattering mechanism. The rotating rod is arranged in a ladle, and the isolation mechanism is arranged at the lower end of the rotating rod. The rotating block is fixedly connected to the upper end of the rotating rod, and the scattering mechanism is arranged at the middle portion of the rotating rod. The rotating block is arranged at the upper side of the interior of the ladle. The isolation mechanism comprises an installation ring, a connecting rod, a moving block and a connecting block. The connecting rodis fixedly connected to the outer surface of the installation ring. The high-creep-ratio and high-strength hydraulic motor body shell blank casting technology is mainly used for solving the problemsthat in the casting technology at present, when a crushing method is commonly used for producing vermicular graphite cast iron, molten iron and a vermicular agent can generate relative impacts, the vermicular agent is not detonated at the bottom or is detonated too early, the absorption rate of the molten iron on the vermicular agent is reduced, creeping is poor, and tensile strength and hardnessof a hydraulic motor body shell are affected.

The invention relates to a silver palladium / packfong stratiform composite material and a preparation method. The silver palladium / packfong stratiform composite material is characterized by being composed of a BZn alloy the surface of which is coated with metallic nickel and AgPd, wherein the AgPd is a work layer and the BZn is a basement layer. The preparation method of the material comprises thefollowing steps: adopting sulfamate continuous strip plating to plate a metal nickel layer on a BZn copper alloy surface; and carrying out hot rolled cladding on the AgPd alloy under the protection of nitrogen or hydrogen or the mixed gas of nitrogen and hydrogen. In the method of the invention, a metal nickel layer is plated on the BZn surface so as to control volatilization of Zn, thereby reducing deposition and enrichment of Zn on the surface of the AgPd layer, improving metal luster thereof, increasing initial usability of a brush material and satisfying requirements from high-end users.

The invention discloses a method for constructing a copper wire on a wafer, which comprises the following steps of: depositing a first interlayer dielectric on the upper surface of the wafer; constructing a second interlayer dielectric on the upper surface of the first interlayer dielectric of the wafer, wherein the hardness of the second interlayer dielectric is lower than that of the first interlayer dielectric; photoetching the second interlayer dielectric and the first interlayer dielectric to define a groove structure, wherein the bottom of the groove structure is positioned in the firstinterlayer dielectric; sequentially depositing a barrier layer and a copper seed crystal layer on the upper surface of the wafer and the inner wall of a groove; depositing copper on the upper surfaceof the wafer, wherein the copper is filled in the groove to form the copper wire; and performing chemical mechanical polishing (CMP) on the wafer to reach the first interlayer dielectric so as to make the upper surface of the wafer subjected to planarization. The invention also discloses a CMP method for the copper. The sinking degree of the surface of the copper wire constructed by the scheme ofthe invention is reduced to a certain extent compared with that of the prior art.