The production process of elbow is quenching and h

The production process of elbow is quenching and hot pressing

The tempering and annealing of the quenched hot pressing elbow by reheating the U-shaped elbow is one of the factors that determine the quality of the elbow after forming. If we grasp these two links well, the production of the elbow will certainly improve the production efficiency.

To a certain temperature, and then a certain method of cooling is called tempering.Its purpose is to eliminate the internal stress caused by quenching, reduce hardness and brittleness, so as to achieve the desired mechanical properties.Tempering is divided into three types: high temperature tempering, medium temperature tempering and low temperature tempering.Tempering and quenching, with the use of normalizing.

Tempering and tempering treatment: the heat treatment method of high temperature tempering after quenching is called tempering and tempering treatment.High temperature tempering refers to tempering between 500 and 650℃.The properties and materials of steel can be greatly adjusted by tempering and tempering. Its strength, plasticity and toughness are good, and it has good comprehensive mechanical properties.

Aging treatment: in order to eliminate the size and shape changes of precision measuring tools or molds and parts in long-term use, the workpiece is often reheated to 100-150℃ and maintained for 5-20 hours before finishing after low temperature tempering (low temperature tempering temperature 150-250℃). This process is called aging to stabilize the quality of precision parts.It is particularly important to aging steel members under low temperature or dynamic load to eliminate residual stress and stabilize the structure and size of hot pressing elbow.

Annealing of hot pressing elbow:

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