The importance of cooling in the heat treatment process
Cooling is also an important step in the heat treatment process. The cooling method varies from process to
process, mainly to control the cooling rate. Generally, the cooling rate of the annealing is slow, the cooling rate of
the normalizing is faster, and the cooling speed of the quenching is fast. However, there are different
requirements depending on the type of steel. For example, an empty hard steel can be hardened at the same
cooling rate as a normal fire.
Metal heat treatment processes can be roughly divided into three categories: overall heat treatment, surface heat
treatment and chemical heat treatment. Depending on the heating medium, heating temperature and cooling
method, each class can be divided into several different heat treatment processes. The same metal uses different
heat treatment processes to obtain different microstructures and thus different properties. Steel is a widely used
metal in the industry, and the microstructure of steel is also complicated, so there are many kinds of steel heat
The overall heat treatment is a metal heat treatment process that heats the workpiece as a whole and then cools it
at an appropriate speed to change its overall mechanical properties. The overall heat treatment of steel has four
basic processes: annealing, normalizing, quenching and tempering.
PINTEJIN Rigging lifting sling now has become leading enterprise in China. And we are creating the largest-scale and metal forging workshop.PINTEJIN has the complete production line from raw material to finished products. Each processing has independent workshop, making lifting sling, ratchet strap, car towing belt from 0.5T to 3000T. We are capable of finishing big order quickly.