41results about How to "Meet the needs of the job" patented technology

The invention belongs to the field of alloy material, relating to no-co ferrous alloy, in particular to no-co ferrous alloy for enhancing material of the sealing face of a nuclear power valve. The no-co ferrous alloy powder composition contains the following ingredients by weight percent: 20.5%-21.5% of Cr, 3.0%-3.5% of Ni, 3.0%-3.5% of Mn, 2.0%-2.5% of Si, 0.9%-1.0% of C, 1.5%-2.0% of Mo, 0.7%-1.2% of W, 0.3%-0.5% of V, P is less than or equal to 0.02%, S is less than or equal to 0.02%, 0.5%-1.0% of Y and the balance of Fe. The no-co ferrous alloy powder composition contains no noble metal of Co, at the same time, since laser cladding technology is adopted to prepare the coating, the microhardness of the cladding layer is 1.6-1.8 times of that the stainless steel matrix. The no-co ferrous alloy powder composition has excellent high-temperature abrasion performance and high-temperature corrosion resistance, so the no-co ferrous alloy powder composition can prolong the service life of the valve.

The invention discloses a motor vehicle wheel distance adjusting mechanism. The motor vehicle wheel distance adjusting mechanism comprises a vehicle frame, and is characterized in that a wheel distance adjusting motor is mounted in the center of the vehicle frame and comprises double output shafts, the two ends of each output shaft are provided with a reduction box R and a reduction box L correspondingly, each reduction box comprises a worm and gear mechanism with double output shafts, one of the output shafts of each reduction box is provided with an encoder B, the output shafts of the reduction boxes are connected with the rear ends of screw and nut mechanisms through universal joints correspondingly, the front ends of the four screw and nut mechanisms are mounted at the four corners ofthe vehicle frame correspondingly, the screw and nut mechanisms are provided with retractable frames, the front ends of the four retractable frames are provided with steering executing mechanisms correspondingly, wheels are mounted on the steering executing mechanisms, wheel driving motors are further mounted on the steering executing mechanisms, a bottom plate is mounted at the bottom of the vehicle frame, and a power system and a control system are mounted on the bottom plate. The motor vehicle wheel distance adjusting mechanism has the characteristics of being simple in structure, reasonable in design, wide in application, high in practicability and the like.

The invention relates to a polyurethane patching material used for settlement repairing of a ballastless structure for a high-speed railway. The polyurethane patching material is formed by hybrid reaction of an A component material and a B component material by a high-pressure impact. The volume ratio of the A component and the B component is 1:1-1:1.8. The A component is a mixture formed by polyhydric alcohol modified diphenylmethane diisocyanate and multi-methylene multi-phenyl isocyanate. The viscosity of the A component ranges from 100 mPa.s to 200 mPa.s at the 25 DEG C temperature. The B component is a mixture formed by polyhydric alcohol, a coupling agent, a hydrolytic stabilizing agent, a cross-linking agent, a foam stabilizing agent, a catalyst agent and a foaming agent. The viscosity of the B component ranges from 150 mPa.s to 300 mPa.s at the 25 DEG C temperature. The B component is characterized in that at least a part of end amido polyolefin polyhydric alcohol with 8 functionalities is in the polyhydric alcohol, and the content of the end amido ranges from 60%-80%. According to the polyurethane repairing material, the chemical reaction speed is high, the expansibility is high, the mechanical strength is high, the binding power is high, the size stability is high, the anti-hydrolysising property is good, and the deformation of accumulated residues is low. The polyurethane repairing material can be used for the settlement repairing of the ballastless structure for the high-speed railway, and can also be used for the pavement structure repairing of an expressway and the settlement repairing of an industrial building terrace.

The invention discloses a nickel-base alloy coating for a sealing surface of a nuclear power valve, and is characterized in that the nickel-base alloy coating is prepared according to a method of conducting laser-cladding on nickel-base alloy powder. The nickel-base alloy powder comprises the following constituents by weight percent: 20.0 to 24.0 percent of Cr, 4.0 to 4.2 percent of Si, 3.0 to 3.5 percent of P, 3.0 to 3.2 percent of Mo, 8.0 to 8.5 percent of Fe, 1.0 to 1.2 percent of C, 0.8 to 1.0 percent of yttrium oxide, and Ni in balancing amount. The laser-cladding process adopts a synchronous powder feeding method and a pre-coating method. The nickel-base alloy powder mixture contains no noble metal Co, thereby particularly meeting requirements on valves under nuclear environments; and due to the formulation design of the mixture, and the advantage of the laser-cladding technology in coating preparing, the coating on the sealing surface has a favorable high-temperature property.