Vacuum Gas /Oil Quenching Furnace

Vacuum Gas Oil Quenching Furnace

High Pressured Vacuum Gas Oil Quenching Furnace is mainly used for cool work & hot work steel, high speed steel, tool steel material vacuum quenching, tempering and solution-ageing process. And it is divided into horizontal and vertical types. The vertical type vacuum gas quenching furnace is especially suitable for the vacuum gas quenching process of large workpieces with easy deformation such as long rod-shaped parts, shafts and plate parts. The workpieces can keep bright and minimal deformation after heat treatment.


Chamber material:Cast iron, stainless steel, optional
Structure:Horizontal, vertical, batch, continuous
Max temperature:500C - 1300C (custom made)
Heater:Mo belt, Tungsten, Graphite, SiMo, SiC
Temperature unifor:±5℃
Heating method:resistance, induction
Vacuum Degree under working:Customizable
Loading capacity:Adjustable

High Pressured vacuum  oil /gas quenching furnace:


Vacuum quenching refers to achieving a clean quenching of parts. Quenching and cooling of parts in a vacuum furnace, quenching medium is mainly gas (such as inert gas), water and vacuum quenching oil. High Pressured vacuum  oil /gas quenching furnace has been widely used in a variety of carburizing steel, alloy tool steel, high-speed steel and stainless steel quenching, as well as a variety of aging alloys, hard alloys, and other materials. Solid solution treatment of magnetic alloys.

There are two types of quenching in vacuum: gas quenching and liquid quenching. Gas quenching means that the workpiece is heated in a vacuum and cooled in a cooling chamber with a high purity neutral gas (e.g. nitrogen). Suitable materials for gas quenching are high speed steels and high carbon and high chromium steels, which have a low critical cooling rate for martensite. Liquid quenching is a process where the workpiece is heated in a heating chamber, then moved to a cooling chamber where it is filled with high purity nitrogen and immediately fed into a quenching oil bath for rapid cooling. If high surface quality is required, the workpiece should still be tempered and precipitation hardened in a vacuum furnace after vacuum quenching and solid solution heat treatment.

Vacuum high pressure gas quenching furnace is a super advanced vacuum heat treatment equipment, its outstanding performance and unique design provide a wide range of Suitable for vacuum bright gas quenching, annealing and hardening of high speed steel, die steel, stainless steel, alloy steel, titanium alloy and other high precision parts made of alloy materials. Features such as sintering of magnetic materials and rapid cooling. The High Pressured vacuum  oil /gas quenching furnace consists of a heated furnace hood and a mobile base. The square (or round) hood is topped with a crane, which lifts the baskets by chains and hooks into the furnace chamber. The hood is supported by a beam and has a pneumatically (or electrically) operated door at the bottom. The floor below the hood is moved and positioned on rails and contains the quench tank and the charge baskets. During production, the baskets on the bottom shelf are moved directly under the hood, the door is opened, the chains and hooks are lowered and the baskets are lifted into the furnace chamber, and the door is closed. Heating is carried out afterwards.

The quenching is carried out by moving the water tank on the bottom shelf directly under the hood, then opening the door, lowering the chain, and quenching the basket (workpiece). In water.

Features of  Vacuum  gas quenching furnace:


  1. Modular design with reasonable space, fast evacuation and minimal quench gas
  2. High quality graphite felt/metal screen option with 360 degree radiant heating elements
  3. Vacuum partial pressure / low temperature convection heating / multi-zone independent temperature control function
  4. Open or closed-circuit internal water cooling systems
  5. Reliable material cart transfer systems
  6. High-vacuum intermediate gate valve to ensure independent operation of each vacuum chamber.
  7. Electromagnetic drive and cooling system for oil agitation


Model Working size
Ultimate pressure
Pressure rising rate(pa/h) Loading capacity(kg) Cooling gas pressure(bar)
CDO-VQ-20 200*200*200 4*10-¹~6.7*10-³ 0.67 50 6/10/15/20
CDO-VQ-30 300*300*500 4*10-¹~6.7*10-³ 0.67 100 6/10/15/20
CDO-VQ-40 400*400*600 4*10-¹~6.7*10-³ 0.67 200 6/10/15/20
CDO-VQ-50 500*500*700 4*10-¹~6.7*10-³ 0.67 300 6/10/15/20
CDO-VQ-60 600*600*900 4*10-¹~6.7*10-³ 0.67 500 6/10/15/20
CDO-VQ-70 700*700*1000 4*10-¹~6.7*10-³ 0.67 700 6/10/15/20
CDO-VQ-80 800*800*1200 4*10-¹~6.7*10-³ 0.67 1000 6/10/15/20
CDO-VQ-v50 Ø500*700(vertical) 4*10-¹~6.7*10-³ 0.67 300 6/10/15/20
CDO-VQ-v70 Ø700*900(vertical) 4*10-¹~6.7*10-³ 0.67 500 6/10/15/20
CDO-VQ-v100 Ø1000*1000(vertical) 4*10-¹~6.7*10-³ 0.67 800 6/10/15/20
CDO-VQ-v120 Ø1200*1000(vertical) 4*10-¹~6.7*10-³ 0.67 1000 6/10/15/20
Max temperature:1320℃   ,   Temprtature unifromity:±5℃


Vacuum technology is the basis for innovations in heat treatment processes.

Heat treatment is a process in which metal/steel parts are fully or partially exposed to a time-temperature sequence to change their mechanical and/or corrosive properties. There are many applications, such as.

-Annealing – Hardening – Tempering – Aging – Surface hardening

In order to achieve higher material strength, better wear resistance or improved corrosion resistance of components, all these processes require up to Temperatures of 1.000°C and higher and specially developed furnaces are required to reach this range.


Vacuum annealing
Annealing is a heat treatment that involves heating to a specific temperature, holding it slowly and cooling it. This type of process is usually used to obtain a softer structure of the part and to optimize the material structure for subsequent work steps (machining, forming). The parameters depend on the material and the desired structure.

Vacuum Hardening and TemperingHardening is a typical heat treatment process that involves heating to a specific temperature (mostly above 900°C) and direct rapid cooling or quenching. Parts combined. The selection requirement is to change the structure of the material partially or completely to martensite. The parts are tempered after hardening to obtain high ductility and toughness.

Vacuum Surface Hardening
One of the important processes is the surface hardening or carburizing process. The parts are heated to 900°C-1.000°C and the process is carried out by adding specific gases (hydrocarbons) to the furnace atmosphere. Absorbs carbon, thereby enriching the surface of the part. After this treatment, the part is hardened to obtain the desired properties. This increases the resistance to stress and friction on the component’s surface. The core of the part remains softer and more ductile, which exposes the part to high stresses throughout its service life.