Quenching, tempering, normalizing, annealing, do you know clearly?
Quenching, tempering, normalizing, annealing, do you know clearly? In order for metal workpiece to have required working properties, a heat treatment process is often necessary. Heat treatment process generally includes three processes of heating, heat preservation and cooling. It is divided into quenching, tempering, normalizing, annealing, etc. depending on process. Can you distinguish it? What is quenching? Quenching of steel is to heat steel to a temperature above critical temperature Ac3 (hypegmatized steel) or Ac1 (hyper-eutectoid steel), hold it for a period of time, make it all or part austenitized, and then rapidly cooling to a temperature below Ms (or isothermal near Ms) at a cooling rate greater than critical cooling rate. Solution treatment of materials such as aluminum alloys, copper alloys, titanium alloys, tempered glass, or heat treatment process with a rapid cooling process is also referred to as quenching. Purpose of quenching: 1) Improve mechanical pr...