38results about How to "High fusion rate" patented technology

The invention discloses a manual arc welding repair method for a centrifugal blower after impeller blade abrasion. The method comprises a preparation step before repair and a repair step, wherein the repair method comprises the following steps: cleaning a workpiece, detecting the workpiece; disassembling a damaged impeller; analyzing the workpiece; installing a special tooling; removing a fatigue layer after the abraded part of the impeller blade is removed, and detecting a base material; selecting a welding material, and welding the repaired damaged part in manners of small current, short arc operation and symmetry welding; then carrying out destressing heat treatment, and removing residual stress; carrying out surface coloring flaw detection on the processed workpiece surface, and assembling as a whole, so as to achieve the traditional design standard of a manufacturer. The repaired part has the advantages of good abrasive resistance, large hardness, high fusion rate of a cladding layer and an impeller blade base material, small impeller deformation and the like.

The invention discloses a flux for electrified maintenance of riser bus bars of aluminum cells. The flux comprises self-fluxing soldering flux and blasting powder. The blasting powder covers on the surface layer of the self-fluxing soldering flux, and by mass percentage, the blasting powder and the self-fluxing soldering flux range from 0.15:100 to 0.25:100. The flux can be used for maintaining the riser bus bars in the electrified aluminum cells, the self-fluxing soldering flux and the blasting powder are stable in reaction and high in safety, fusing rate of side walls of soldering joints is high, performances of soldering joints can be similar to base materials, and using is facilitated.

The invention relates to a laser cladding repairing process of a valve seat. The process comprises the following steps: A, treating the surface of the valve seat, and carrying out failure analysis on the valve seat; B, optimizing the technical parameters for laser cladding according to the failure analysis results of the valve seat, wherein the alloy powder adopted comprises the following components in percentage by weight: 0.5-1% of C, 19-23% of Cr, 1.5-2% of B, 1-3% of Si, 0.05-0.5% of Mo, 0.05-0.5% of Mn, 7-9% of W, 2.5-4% of Ni and the balance of C; and C, detecting. According to the laser cladding repairing process of the valve seat, laser cladding is carried out on the surface of the valve seat, so that the size of the valve seat is recovered to meet the using demands, and the corrosion resistance and wear resistance of the repaired valve seat exceed the original performances.

The invention relates to a laser repair method of the mechanical repair field, in particular to a laser repair method for an abraded centrifugal fan bearing block. The laser repair method comprises the following steps of: cleaning a workpiece, detecting the dimensions of each part and determining a damaged part and the abrasion loss thereof; carrying out circular runout and end face runout detection on the workpiece; carrying out failure analysis and service life evaluation on the workpiece; removing the fatigue layer of the damaged part of the centrifugal fan bearing block and washing clean;detecting the hardness and the component of the parent material of the centrifugal fan bearing block; according to a detection result, preparing cladding powder, regulating the operating data of a laser device, setting a laser cladding technical parameters and carrying out laser cladding on the damaged part of the centrifugal fan bearing block by adopting a synchronous powder feeding mode; carrying out mechanical processing according to the requirement; carrying out surface colouration flaw detection on the processed workpiece, and detecting the processing precision of the centrifugal fan bearing block; and checking the centrifugal fan bearing block. The method has the advantages of high abrasion resistance, high hardness, high fusing rate of a cladding layer and the parent material of the bearing block, small deformation of the bearing block and the like.

The invention relates to a laser cladding repair process for gear, which comprises the following steps: (A) treating the surface of the valve seat and performing failure analysis on the valve seat; (B) integrally preheating the gear at 80-120 DEG C and locally preheating the portion to be repaired of the gear at 80-220 DEG C at the same time; (C) optimizing technological parameter according to the failure analysis result of the gear, and performing laser cladding on the valve seat layer by layer, the thickness of each cladding layer is less than or equal to 0.4 mm, the edge of the later cladding layer extends out of the edge of the former cladding layer by 4 mm to 6 mm, the powdered alloy adopted is prepared from the following components in percentage by weight: less than or equal to 0.5% of carbon, 38-52% of chromium, 1.5-2.5% of boron, 0.5-1.5% of silicon and the balance of ferrum; and (D) performing detection. The surface of the gear is subjected to laser cladding through the laser repair process for gear, so that the size of the valve seat is recovered to operating requirement, and the hardness and abrasive resistance of the valve seat repaired exceed its original performance.