Crane wheel forgings are a classification of forgings and are mainly used in cranes, port machinery, transport aircraft, and mining machinery. Today we come to understand the principles of chemical performance testing of crane wheel forgings.
Principles of mechanical properties and selection of test parts: cut longitudinal samples along the main stress direction of the part; cut longitudinal, transverse and height samples at high stress parts of the part; parts with metal flow lines required for the part; parts with the smallest amount of forging deformation ; Near the end of the riser of the ingot; in the cross section of the crane wheel forging, the round solid part is generally cut at a radius of 1/3 from the surface; the rectangular solid part is cut at a diagonal of 1/6 from the surface; the hollow part is at Cut at 1/2 wall thickness.
Low-magnification organization, the principle of selecting the detection part: cut off the streamline test specimen at the metal flow line where the requirements or the section that best reflects the reasonable flow direction of the metal; take the horizontal low-power test piece at the largest cross-section as much as possible; longitudinal low-power test The piece should be taken on the cross section of the main axis of the part; the crane wheel forgings that are directly forged with steel ingots should be cut at the end near the riser.