What is the heat treatment process of Q345NH weathering steel plate?

Heat treatment of Q345NH weathering steel plate: it is a process in which solid steel is heated, insulated and cooled in an appropriate manner to obtain the required structure and properties.
Heat treatment can not only be used to strengthen steel and improve the performance of mechanical parts, but also can be used to improve the technological properties of steel. Its common point is: only change the internal organizational structure, do not change the surface shape and size.

Heat treatment process can significantly improve the mechanical properties of steel, increase the strength, toughness and service life of parts, and improve the hardness and wear resistance. So important machine parts and tools are heat treated.
Heat treatment can also improve the processing performance of the workpiece, so as to improve productivity and processing quality. Therefore, heat treatment plays a very important role in the machinery manufacturing industry.

In the production of quenching and then high temperature tempering is called "quenching and tempering treatment", parts after quenching and tempering treatment have good comprehensive mechanical properties, widely used in a variety of important structural parts, especially those working under alternating load connecting rods, bolts, gears and shafts, etc.

But the surface hardness is low, not wear-resistant. The surface hardness of parts can be improved by quenching and tempering.