Today to introduce about in the process of steel with high frequency quenching and tempering treatment process related knowledge, what do you mean about conditioning, have what connection and difference between with quenching, heng Yang electromechanical small make up of the following will solve for you, and see it together!
What is the meaning of quenched and tempered & emsp;
Conditioning is quenching and high temperature tempering heat treatment process.
Conditioning parts mostly in larger dynamic load under the action of work, they are under the tensile, compression, bending, torsion and shear effect, also has some surface friction, requires a certain wear resistance, and so on.
In a word, parts in all kinds of work under the complex stress.
Such parts mainly for various machines and institutional structure, such as shaft, connecting rod, screw, gear, etc. , such as machine tools, automobile and tractor manufacturing industry with very common.
Especially for large parts of heavy machinery manufacturing, quenched and tempered treatment with more.
Therefore, the quenched and tempered treatment occupies very important position in the heat treatment.
Tempering treatment and the high frequency quenching whether conflict & emsp;
Do not conflict, conditioning treatment is semi processed products, high-frequency hardening can be used as a post-processing technology, the general high frequency quenching process is completed, with the low temperature tempering process, can be appropriate to remove stress of the workpiece.
The relationship between conditioning and quenching: & emsp;
Quenching process is very short heating time, rapidly heated to the workpiece quenching temperature, then the rapid cooling, artifacts for homogeneous austenitic organization has begun to cool, before quenching at this time to an incomplete hardening.
Conditioning is usually refers to the high temperature quenching + tempering, in order to obtain the tempered sorbite of the heat treatment process, the purpose is to get the strength, plasticity is good comprehensive mechanical properties.
In order to obtain uniform quenching organization, the pretreatment of the quenched and tempered treatment should be the high frequency quenching, uniformity in order to get good sorbite organization.
Tempering heat treatment method & emsp;
Quenched and tempered 45 #, or 40 cr, commonly used in these two kinds of material, also known as quenched and tempered steel, so the original poster said should make sure that these two kinds of material.
The probable time of heat insulation should be according to the components to determine the size, this is not good.
But using medium frequency heating should not be appropriate, because of induction heating is very fast, will not be able to make the organization fully austenitizing, and coarse grains, is bad for the tempering process.
Organizations should be 4 class above even after quenched and tempered the tempered sorbite of organization.
Surface hardening should use the high frequency heating
, it won't affect the heart of sorbite organization.
Ordinary batch production can only be cyclical repeat the process for production, and it is also the most extensive processing method.
If there are conditions and mass production, and requirements of production efficiency and improve the quality of parts, you can use assembly line production.
We have production since the former unit work screw assembly line, using steel flexible pipe conveying, use electric heating, and can join acetone combustion, prevent the decarburization.
Tempering treatment for load bearing of the important parts of the overall final heat treatment, therefore, it is important to the organization's overall performance and grain size.
And induction heating is very fast, has not yet completely dissolved in carbon in austenite, has reached a critical temperature, if continue to heat, will cause the burnt or melt.
Material isn't completely eliminate the internal organization of the stress and cause hidden trouble.
So it is not appropriate.
Induction heating is only used for surface heat treatment, the surface quickly reached a tipping point, without affecting the overall organizational performance.
All is the constant Yang electromechanical small make up to share about high frequency quenching and tempering, and general quenching heat treatment between the knowledge of the respect, if you want to study well steel heat treatment process, you must be familiar with above theoretical knowledge.
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