Key points of operation for tempering of pit vacuum bright annealing furnace
Nov. 10, 2020
Key points of operation for tempering of pit vacuum bright annealing furnace
Tempering at medium temperature can ensure that the parts have higher elastic limit and fatigue strength, and the metallographic structure of the parts is tempered troostite or tempered sorbite. According to this characteristic, medium temperature tempering is often used for the heat treatment of springs, high-strength gears, hammers, molds, high-rise automobile wheels (commonly known as cranes and cranes) and other wheel treads.
The purpose of high temperature tempering is to obtain tempered sorbite or pearlite matrix structure, thereby obtaining good comprehensive mechanical properties (high hardness and strength, good plasticity and toughness). Therefore, high temperature tempering is usually used as a quenching and tempering process (ie, quenching and high temperature tempering). In addition, it can also be used for parts that are not quenched to eliminate stress and prevent deformation, such as welding structural parts to eliminate welding stress. High temperature tempering is also used as an intermediate process of surface quenching and rework to eliminate stress and reduce hardness, rather than an annealing process. After normalizing, high temperature tempering is usually used to reduce hardness and improve workability. High temperature tempering can also be used as a pretreatment process for complex parts and high alloy steel parts before heat treatment (including carburization, etc.).
