vacuum furnace
Its advantages lie in:
1. No oxidation, no decarbonization and rust
removal, eliminating the surface grinding process, thus saving steel and raw
material consumption, saving processing time.
2. degassing. Gases dissolved
in metals at atmospheric pressure diffuse from the inside of the metal to the
surface and overflow at negative pressure. This phenomenon is called degassing.
Vacuum quenching heating has degassing characteristics, so that the surface
purity of the material is improved, thereby improving the fatigue and plasticity
of the mold. Toughness and corrosion resistance.
3., it is beneficial to
remove residual oil and improve product quality.
4. the treated parts have no
hydrogen embrittlement risk to prevent surface embrittlement of titanium and
insoluble metals.
5. heat treatment has little distortion. Because the vacuum
heating is slow, the temperature difference between inside and outside the
workpiece is small; vacuum heating is generally preheated 1-2 times, the
workpiece section temperature difference is small, thermal stress is also small,
so it will not cause greater deformation due to external forces. In general,
vacuum quenching quenched 10%~50% in salt bath quenching.
6. Vacuum quenching
process is stable, repeatable, safe operation, high degree of automation, clean
working environment, pollution-free, pollution-free.
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