Technical Advantage of Induction Heating and Tempering Production Line

Tempering treatment: The heat treatment method of high temperature tempering after quenching is called tempering treatment. High temperature tempering refers to tempering between 500 and 650℃. Tempering can optimize the performance of steel, so that the strength, plasticity and toughness of steel to achieve a better balance, so as to have good comprehensive mechanical properties.

Tempered sorbite was obtained after tempering treatment. tempered sorbite (tempered sorbite) is martensite formed during tempering, in the optical metallography microscope under more than 500 to 600 times to distinguish, it is the ferrite matrix distribution of carbide (including cementation) pellet compound organization. It is also a tempered structure of martensite, which is a mixture of ferrite and granular carbide. At this time, the ferrite has basically no carbon susaturation, and the carbides are also stable carbides. It is a kind of equilibrium tissue at room temperature.

In the choice of tempered steel, there are mainly two categories of carbon tempered steel and alloy tempered steel, no matter which one is chosen, the carbon content control of steel is very strict. High carbon content will lead to high strength but insufficient toughness of the tempered workpiece; However, if the carbon content is too low, the toughness of the workpiece will be increased but the strength will be decreased. In order to obtain good comprehensive performance, the carbon content is usually controlled in the range of 0.30~0.50%.

In the quenching and tempering process, the whole section of the workpiece is required to be quenched, so that the workpiece has a fine needle-quenched martensite microstructure. Through high temperature tempering, the microstructure of uniformly tempered sorbite is obtained, which can optimize the properties of steel.

In general, tempering is an important heat treatment method to optimize steel properties by precisely controlling the quenching and tempering process. It enables steel to achieve a good balance between strength, plasticity and toughness to meet the needs of a variety of engineering applications.