As a widely used stainless steel profile, the production process of I-beam is also complex, and an important process is the quenching of I-beam. Quenching is a heat treatment process that heats the steel to an appropriate temperature, persists for a certain period of time, and then slowly cools (furnace cooling). The quenching process can better enhance the performance of I-beams. Three quenching processes are usually used during processing. Below, the I-beam manufacturer will provide a detailed explanation of the quenching process:
Stress relieving quenching. Heat the workpiece to below Ac1 (100-200) ℃ for insulation, and then cool it in the furnace to below 160 ℃ for air cooling. Primarily used to eliminate internal stress, stabilize scale, and prevent deformation and cracking. The heating temperature is generally between 500 ℃ and 650 ℃.
Isothermal quenching. Heat to a temperature higher than Ac3 or Ac1, adhere to the appropriate time, quickly cool to a certain temperature range within the pearlite modification temperature range, adhere to the quenching process of changing austenite to pearlite structure, and then cool in air.
Completely quenched. Completely austenitizing the steel, followed by slow cooling, to obtain a quenching process close to the equilibrium structure, with a heating temperature of Ac3+(30-50) ℃. Mainly used for castings, forgings, hot-rolled profiles, and welded components of hypoeutectoid steel.
The above is about the quenching process of I-beam steel. It can be seen that the selection of quenching process depends on the heating temperature of stainless steel profiles. Only by selecting a suitable quenching process can the processing performance of I-beam steel be improved, making it more widely used in production.