tire shredder hammer and liner heat treatment

  The heat treatment of tire shredder hammer and liner is an important process to obtain high wear resistance of high chromium cast iron castings, so the castings must be annealed and quenched after heat treatment. The purpose of annealing the tire recycling machine: the internal stress generated during the casting process, increase the plasticity and toughness of the casting matrix, make the composition or structure of the material uniform, and prepare the conditions for subsequent heat treatment.

  The purpose of quenching is to obtain a martensite structure for high chromium wear-resistant cast iron, which is a very important process to obtain high wear resistance of the tire shredder hammer and liner. Because the presence of a small amount of pearlite structure in the high chromium cast iron matrix will greatly reduce the wear resistance. The quenching process is to reheat the tire recycling machine parts to the austenitizing temperature, hold the temperature at this temperature for a period of time, and then cool in the air. Each of these three links is important to the success of the quenching.

  To do this, the temperature in the furnace must be kept uniform while the temperature is rising, and the temperature must be slow. In the heat preservation stage, the entire part has sufficient time to austenitize and reach an equilibrium state, so that supersaturated chromium and carbon in the as-cast matrix are precipitated as secondary carbides, so that the stability of austenite is reduced during subsequent cooling If high temperature does not decompose into pearlite, then it can become horse body at low temperature.