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News

  • Steering Rack Induction Quenching and Tempering
    The steering rack is shown in the figure, and the teeth, the back and the rod part are required to be induction hardened:
  • Solution to Quenching Crack of Induction Hardened Parts
    The mechanism of cracking in the induction hardened part, generally speaking, it is caused by the formation of martensite that leads to volume increase; the shrinkage during quenching and cooling causes excessive internal stress or tissue stress and thermal stress are excessive. Where the stress of the workpiece is concentrated, the quenching crack is more likely to occur. Therefore, in order to solve the quenching crack problem, in addition to the induction heating process factors, the rational
  •  Exfoliation of Hardened Layer, Chipping and Cracking of Edges
    1 Hardened layer peeling off It peels off the entire depth from the boundary of the hardened layer surface to the original tissue, or peels off at a small depth, which is due to the presence of large internal stress in the workpiece. The solution is to temper the workpiece after quenching, or to use self-tempering; in the product design, the appropriate depth of the hardened layer should be selected. If the depth is too shallow, the hardened layer changes too steeply and is prone to spalling.
  • Insufficient Hardness of Induction Hardened Surface After Quenching
    Insufficient hardness after surface quenching is the most common problem, and the reasons are also multifaceted.
  • Forms of Quenching Crack of Induction Hardened Parts
    There are many forms of quenching cracks in induction hardened parts, for example: 1) The brake shoe of the automobile is made of ferritic malleable cast iron, and the quenching crack is generated after 40*50mm plane induction hardening.
  • Mounting Technology and Failure Analysis of Magnetizer
    As an accessory of the quenching sensor, the magnetizer is used more and more widely, from the inner hole sensor, the plane sensor, to the composite and outer circle sensors; the main function of the magnetizer is: drive the current in the copper tube to the open side of the magnetizer, which precisely controls the heating area and does not allow the magnetic field lines to escape to adjacent portions outside the heating zone, since the current on the active ring is greatly close to the heated s
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