11 knowledge points of heat treatment industry!
Heat treatment refers to a metal thermal processing process that changes the chemical composition and structure on the surface or inside of materials by means of heating, heat preservation and cooling in the solid state to obtain the required properties. 1. Normalization: Heat the steel or steel parts to the appropriate temperature above the critical point Ac3 or Acm for a certain time and then cool them in air to obtain pearlite like structure. 2. Annealing: heat the hypoeutectoid steel workpiece to 20~40 ° C above AC3, and after a period of heat preservation, slowly cool it in the furnace (or…