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The types and application of tempering
by：Waxing
2020-10-04
According to different performance requirements artifacts, according to the different tempering temperature and tempering can be divided into the following kinds: (
A)
Low temperature tempering,
150-250 degrees)
Low temperature tempering income group as tempered martensite.
Its aim is to keep a hardened steel under the premise of high hardness and high wear resistance, decrease the quenching stress and brittleness, lest when using split or premature failure.
It is mainly used for cutting all kinds of high carbon cutting, measuring tool, cold punching mould, such as pieces of rolling bearing and carburizing, after tempering hardness is commonly HRC58-64.
(
2)
Medium temperature tempering (
350-500 degrees)
Organization for tempered troostite middle temperature tempering.
Its purpose is to obtain high yield strength, elastic limit and high toughness.
Therefore, it is mainly used for all kinds of springs and hot mould processing, after tempering hardness is HRC35-50 commonly.
(
3)
High temperature tempering (
500-650 degrees)
High temperature tempering organization for tempering sorbite.
Habit will be the combination of high temperature quenching and tempering heat treatment known as conditioning treatment, its purpose is to gain strength, hardness and plasticity, toughness is better comprehensive mechanical properties.
Therefore, it is widely used in automobiles, tractors, machine tools, such as the important structural components, such as connecting rod, bolts, gears and shaft.
After tempering hardness for HB200 commonly - 330.
Atmosphere and the chemical reaction of the metal
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