Industrial Vacuum Oil Quenching Furnace for Mold & Alloy Steel Heat Treatment

Vacuum oil quenching furnace is core industrial vacuum heat treatment equipment, integrated with sealed vacuum heating system and negative-pressure oil quenching cooling system.Workpieces are heated and austenitized inside fully oxygen-free sealed vacuum chamber, then rapidly immersed in special quenching oil for fast low-temperature cooling to complete hardening treatment.The whole heat treatment process isolates air completely, fundamentally avoiding surface oxidation, decarburization and rust on workpieces. It has become the mainstream standardized heat treatment machine for high-end molds, precision mechanical parts and alloy steel.

1.Vacuum Pumping Stage: Seal the furnace door, the combination of mechanical pump and molecular pump extracts air inside chamber to form high vacuum negative pressure environment.

2.Vacuum Heating & Soaking: Under oxygen-free vacuum condition, graphite heating elements heat workpieces by thermal radiation. Temperature is precisely controlled to quenching setpoint and keep constant for full heat penetration.

3.Negative Pressure Oil Quenching & Cooling: After heating, quenching oil tank lifts rapidly, all workpieces are fully immersed in quenching oil. Under vacuum negative pressure, oil circulates quickly for heat exchange, workpieces cool evenly and rapidly to finish martensitic transformation for higher hardness and wear resistance.

4.Gas Filling & Unloading: After cooling, fill high-purity nitrogen into chamber to break vacuum, then open furnace door to take finished workpieces out.

1.Vacuum Heating Chamber: Double-layer water cooling jacket structure, equipped with graphite heat shield and graphite heating elements, excellent thermal insulation & low heat loss.

2.Vacuum Pump Unit: Rotary vane mechanical pump + molecular pump vacuum system, high ultimate vacuum degree and stable pumping speed.

3.Quenching Oil Cooling System: Large-capacity oil tank, forced oil circulation stirring, external oil-water heat exchanger for stable temperature control.

4.Lifting Driving Mechanism: Hydraulic / electric lifting oil tank with smooth movement, full uniform cooling without dead zone.

5.Full-Automatic PLC Control System: Touch screen HMI, segmented temperature control, vacuum interlock, safety alarm and storage of multiple heat treatment programs.

6.Safety Protection System: Over-temperature protection, low vacuum alarm, explosion pressure relief, nitrogen anti-oxidation protection device.

1.Zero Oxidation & Zero Decarburization: Whole process under sealed high vacuum environment, bright workpiece surface without secondary sandblasting & polishing, greatly reduce post-processing cost.

2.Uniform Cooling & Stable Heat Treatment Consistency: Vacuum negative pressure oil circulation cooling ensures tiny hardness deviation inside & outside workpieces, product pass rate over 99%.

3.Energy Saving & Low Consumption: Multi-layer graphite heat shield locks heat well, double water cooling chamber reduces heat loss, power saving over 30% compared with box atmosphere furnaces.

4.Full Automatic Intelligent Operation: One-click start of full process, auto vacuum pumping, heating, soaking, oil quenching and nitrogen filling, no full-time operator required.

5.Wide Material Compatibility: Suitable for all kinds of mold steel, high-speed steel, stainless steel, bearing steel, titanium alloy and structural steel quenching.

6.Low Maintenance & Long Service Life: Corrosion-resistant graphite heating elements with long service life, stable vacuum pump unit and low failure rate.

7.Eco-friendly & Pollution Free: No salt bath, no waste gas emission of chemical atmosphere, sealed quenching oil circulation, clean workshop without smoke.

1.Mold Industry: Stamping mold, die casting mold, plastic mold, cutting tool mold quenching

2.Auto Parts: Gear, bearing, piston, precision transmission structural parts vacuum hardening

3.Machinery Cutting Tools: HSS drill bits, milling cutters, taps, hobs heat treatment

4.Precision Hardware Parts: Stainless steel valves, hydraulic fittings, medical device components

5.Aerospace Industry: Titanium alloy, superalloy precision structural part vacuum strengthening

6.Bearing Industry: High-precision bearing rings, needle roller vacuum oil quenching

Q1: What material can be treated by vacuum oil quenching furnace?

A1: It works for all ferrous metal alloys: H13, Cr12MoV, SKD11, high speed steel M2/M35, stainless steel 440C, bearing steel GCr15, titanium alloy, structural steel 40Cr etc. Non-ferrous metal such as aluminum alloy cannot use oil quenching process.

Q2: Is vacuum oil quenching better than atmosphere furnace quenching?

A2: Yes. Vacuum furnace avoids oxidation & decarburization completely, brighter workpiece surface, higher hardness uniformity, lower post-processing cost and cleaner working environment without waste gas pollution.

Q3: Can you customize the furnace size and loading capacity?

A3: Yes, we support full custom service, including chamber dimension, loading weight, temperature range, automatic feeding mechanism and local voltage adaptation for different countries.

Q4: How long is the equipment warranty period?

A4: Core components (vacuum pump, heating elements, PLC controller) offer 12 months warranty, lifetime technical support and spare parts supply.