CNC Knowledge: Encyclopedia of the caliber method, you have used 3 you are definitely a master!

Ten commonly used soil methods Summary:

There are ten common thermal treatment methods, which are a soap texture (oil, tip); Return of the cooling caliber method; Extinction self-reinforcement method;

1. Unique media (water, oil, air)

Simple medium (water, oil, air) Extinction: the quenching middle that turns off the part which has been heated for the caliber temperature can cool it completely. This is the simplest extinction method, which is commonly used in simple steel and alloy steel steel parts. The extinction medium is selected according to the size, end, size, shape, etc. Parts.

Second, double -aging extinction

Double extinction to the test: the part which heated to the soil temperature is cooled in the midfielder with a strong cooling capacity near MS points, then passed through the middle of slow caliber to cool at room temperature for Achieving different soaring temperature intervals of the caliber, and there is the cooling speed of the ideal extinction. For large -scale parts for large -scale steel or steel in large -scale alloy or alloy, carbon tool steel also adopts this method. The common cooling mediums include water oil, water nitrate salt, water air, oil. .

Third, the implementation of the stagingMatlinology Graded Tremping:

Austenitization in steel, followed by the liquid medium (salt or alkaline bath) slightly higher or less than steel of the steel, maintains the appropriate time. Generally used for small parts with complex shapes and deformation requirements, high -speed molds in speed at speed and high alloy steel are also commonly used for extinction.

Fourth, the MARTENSITE notation extinction method under the MS pointMatriagal extinction method below the MS point:

When the temperature of the bath tank is lower than the MS for steel for parts, when the room is higher than the MF, the room is quickly cooled in the bathtub. like the classification of the caliber. Commonly used for low spare steel parts with large size.

5. Temperature extinction method equivalent to the navelNetity temperature extinction method:

The part was extinguished in the average temperature of the bath tank under the temperature of the steel steel, which made it transform the belly and generally heat 30 to 60 minutes in the bathtub. The main steps in the portfolio temperature temperature process are three steps: ① Avitronization; Cast iron ink.

6. Composed extinction methodComposite extinction method:

First of all, the part was cooled in Mas below the MS with a volume score of 10% to 30%, then the temperature in the lower area of ​​Bellfield was equal to the temperature of the larger section.

Seven, method of extinction of the prior equivalence temperaturePre-method in the extinction of the front equivalent temperature:

Also known as the temperature caliber, the parts are first cooled in the bath tanks at lower temperature (higher than MS), then went to a high temperature bath tank to make the transformation of the ‘Austenite at an equal temperature. Steel parts adapted to poor exposure or large sizes must be carried out.

8. Delay the cooling outlet method

Delay cooling method: the parts are pre-referred to the temperature slightly higher than the AR3 or AR1 temperature in the air, hot water and salt bath, then the single heat caliber is carried out. Commonly used in complicated forms of different parts of each part and the parts which require a small deformation.

Nine self-relief self-reset methodExtraction of the self-recovery method:

All treatment parts are heated, but only the need to be more difficult (often) to cool the soil solution during the caliber, and to immediately remove the cooling cooling process in the air when the color of the fire disappears is not submerged. The extinction self-recovery method uses the cold heat of the heart to spread to the surface, so that the surface is ignited. Common tools such as tadpoles, chongzi, hammer, etc.

10. Jets extinction methodJet extinction method:

The water current can be large or small, depending on the depth of the extinction required by the room. The spraying extinction method does not form a steam film on the surface of the room, so that it can guarantee that the hardening layer of the quench deeper than semi-sue water can be obtained. Mainly used for local surface extinction.