Quenching medium frequency induction heating equipment
for the workpiece parts more common defects after quenching, quenching hardness is not enough to reach requirement, soft block, appeared deviation and deformation quenching crack weather-shack, and localized burning-out melting, etc.
Surface quenching after quenching hardness is not enough: not enough surface quenching hardness after quenching is the most common phenomenon, such problems occupied more than 90%, the root cause is many aspects.
1, the raw material itself the content of various factors of workpiece material itself and its annotation does not conform to, shoddy.
So there was a time in the quenching length, did not meet or exceed artifacts appear melt quenching temperature, etc.
Experienced return an identification method is a spark is often used to identify method, it is the most simple way to routine inspection product artifacts in the high-speed on the grinding wheel to grind the spark, can probably understand the product is the carbon content of workpiece has change, the higher the carbon content, the more spark.
2, or inadequate or precooling quenching heating temperature long time due to some technical reasons, quenching heating time is too short lead to inadequate quenching heating temperature or precooling time is too long, cause the quenching temperature is too low.
In medium carbon steel, for example, the former quenching organization contains a lot of not dissolve ferrite, the latter is its organization for austenite or sorbite.
3, insufficient cooling (1) in the automation equipment quenching, probably because of spray surface area is too short, product workpieces after quenching, after spray area, causing the core heat and surface self tempering,
The ladder shaft big steps in superior most likely to produce)
, resulting in surface layer self tempering temperature is exorbitant, can often from the surface color and temperature sensor.
(2) a heating method, the cooling time is too short, self tempering temperature is too high, or because the spray hole because of scale oil dirt sectional area reduces the spray hole, lead to self tempering temperature is too high,
With spray hole of gear quenching induction coil, the most easily produce such ills)
(3) hardening liquid (
The water temperature is the oil temperature)
Temperature is too high, or insufficient pressure lead to reduced flow, concentration change, quenching liquid in the mixed scale oil, etc.
(4) cooling fluid (
Water and oil)
Use time is too long.
After its dirt cause local congestion, spray hole is characterized by local hardness is not enough, often with soft blocks corresponding to the spray hole plugging position.
Foshan city heng Yang mechanical and electrical equipment co. , LTD. , is the domestic earlier developed in high frequency induction
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Has a strong r&d team, rich experience, according to the workpiece and process customized automatic induction heating equipment, free of charge to provide customers with personalized technology solutions.
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