Vacuum Oil Quench Furnace

The control system of the Vacuum Oil Quench Furnace is controlled by PLC, and the temperature is controlled by an intelligent temperature controller. The control is accurate and the degree of automation is high.

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Product Introduction

What is Vacuum Oil Quench Furnace?

The control system of the Vacuum Oil Quench Furnace is managed by a PLC, and the temperature is regulated by an intelligent temperature controller. The control is precise, and the level of automation is high. It can achieve automatic/manual non-disturbance switching and has an abnormal alarm function, making operation simple and reliable.

Equipment Usage and Characteristics of Vacuum Oil Quench Furnace

The vacuum oil quench furnace features a graphite furnace with a graphite felt heat shield. The electric control system is highly automated, stable, and reliable. The temperature control employs an intelligent temperature controller, while the action is controlled by a programmable controller. The Vacuum Oil Quench Furnace is primarily used for bright quenching and annealing of alloy steel, tool steel, die steel, high-speed steel, bearing steel, spring steel, stainless steel, etc., or for vacuum sintering of ceramic materials and hard alloys; and vacuum brazing of metal materials.

Product Features of Vacuum Oil Quench Furnace

The second-generation heating element graphite rod is adopted, offering a long service life and ease of maintenance.

The composite gate valve provides good heat insulation and air insulation effects.

A reasonable heating chamber structure ensures more uniform heating, less heat loss, and greater energy efficiency.

The stirring device in the oil reservoir ensures a reasonable and uniform flow direction of the quenching oil, ensuring minimal workpiece deformation.

The vacuum level and air-cooling pressure inside the furnace can be adjusted to meet the requirements of different materials.

The workpiece transmission mechanism is stable, flexible, safe, and reliable.

The furnace cover of the air-cooling chamber adopts a staggered-toothed flange ring structure to ensure positive and negative pressure sealing in both directions.

Fully intelligent industrial computer control and a manual operating system are included.

Benefits of Vacuum Oil Quench Furnace

Safety

No open flames / no flame curtains

No direct water cooling of oil, no risk of water oil mixing and fire hazard

No endo gas burn-off

Load transfer is innovative, smooth, hydraulically operated

Metallurgical

Neutral vacuum atmosphere; can group different alloys in one batch

No oxygen probes

No decarb / carburization

No intergranular oxidation

Cleaner surface finish on parts

Gas cool or oil quench

Can use thermocouples for actual work temperature measurement during heating and soaking

Environmentally Green

Zero Combustion for atmosphere control, therefore no COx and NOx effluents

Economical

Graphite insulated energy efficient electrically heated hot zone.

Materials Processed

H-1, H-2, H-3, H-4 Steels
300M Alloy Steel
4130, 4140, 4150, 4330M, 4340 Alloy Steels
5160 Alloy Steel

8620 Alloy Steel
8740 Alloy Steel
9310 Alloy Steel
D6AC Alloy Steel
M-2/M-4 High Speed Tool Steel

O-1 Tool Steel
52100 Steel
Aeromet 100
And many other grades!

What is Oil Quenching?

Oil quenching is THE quenching solution for parts that cannot be gas quenched in large quantities because of the wide volume of the loads – this implies poor profitability since it would require several cycles to treat the same amount of parts. Also, oil quenching allows treating pats made of materials that are not compatible with gas quenching, because of their raw materials' characteristics.

When comparing oil quenching cells on traditional furnaces with the ones supplied on ECM oil quenching furnace cells, many advantages benefit to our solutions:

• Thanks to the vacuum process and quenching cell inertia - there are no flames, which eliminates the risk of fire

• Oil life cycle is highly increased thanks to its non-oxidation. Indeed, the oil filling process is optimized and allows compensating wastes caused by the treatment of parts. Quantities are calculated to obtain enough regeneration of oil. This also cuts down maintenance costs since this reduces the cell's cleaning frequency

In general, once loads are oil quenched, the next step consists in going through a washing machine to clean the parts before going through the final steps of production. A full immersion in lye meets with most needs.

Applicable Technologies

Vacuum Hardening with selectable oil quench or gas quench

Low pressure carburizing with oil or gas quench

High-temperature carburizing up to 1050°C with select case hardening steels with oil or even high pressure gas quench

Carbonitriding with oil quench

Bright hardening

Oxidation in the preheating chamber

Annealing

Tempering

Key applications for oil quench furnaces

CVT (Continuous Variation Transmission) gearboxes' parts

Poorly alloyed steel gearboxes for automotive applications

All kinds of gearboxes and transmissions for trucks or agricultural applications

All mechanical parts with poor or average added value

FAQ

Q: 1. What is vacuum quenching?

A: Vacuum quenching refers to the rapid cooling of parts in a vacuum furnace in order to achieve a bright quenching of parts, the rapid cooling medium is mainly gas (such as inert gas), water, quenching oil, etc.

Q: 2. What is a quench furnace?

A: The Integral Quench Furnace Systems feature obstruction-free work chambers, large capacity re-circulation fans, and strategically located heated sources to ensure rapid heat transfer, low energy use, and excellent temperature and carbon uniformity. A size and in-out configuration is available to fit your needs.

Q: 3. What is the purpose of quenching oil?

A: Quench oils have two primary functions. First, they harden the component by controlling heat transfer during quenching. Second, they enhance the wetting of the component in order to minimize undesirable conditions that may cause distortions and even cracking.

Q: 4. What are the two types of quenching processes?

A: The quenching process can be classified mainly into two types:
Static quenching.
Dynamic quenching.

Q: 5. What is the difference between vacuum hardening and normal hardening?

A: Vacuum hardening is an improvement over conventional hardening in that the component surface is protected from possible negative effects of exposure to a gaseous atmosphere. Vacuum treated material is quenched in gas or liquid, depending on the specification requirements.

Q: 6. How hot is quench oil?

A: For most quench oils other than marquench oils, the optimum rates of cooling are normally obtained when the bath temperature is between 120°F (50°C) and 150°F (65°C).

Q: 7. How is heat transferred in a vacuum furnace?

A: Since, radiation is in the form of electromagnetic waves, it does not require any medium and hence, the waves can pass through vacuum. Hence, the heat transfer through vacuum happens through radiation.

Q: 8. What temperature range is quenching oil?

A: It is recommended for temperature range between 80°C to 140°C to produce better uniformity within hardened parts with minimum distortion. It offers Semi Hot / Warm quenching oil specially developed for Mar quenching of automotive components.

Q: 9. What are the features of high temperature vacuum furnace?

A: This product is a high temperature vacuum degreasing sintering furnace appropriate for sintering of cemented carbide, rare earth magnets, and fine ceramics. This furnace enables one-batch fully automatic treatment in the process from degreasing to pre-sintering, actual sintering, and cooling using the decompressed flow gas. This is a vacuum furnace with the following features: reliable, high quality, and good economic performance and productivity.

Q: 10. What is the structure of a vacuum furnace?

A: A vacuum furnace is a type of furnace that operates under low pressure or vacuum conditions. It is commonly used in various industrial applications such as heat treating, brazing, sintering, and annealing.
The structure of a vacuum furnace consists of several components. These include the furnace body, vacuum unit, hydraulic system, control system, cooling system, and other parts.
The furnace body and furnace door are typically made of high-strength steel plates and are welded and pressed together. They form a double-layer water jacket structure, which helps in maintaining the temperature inside the furnace and provides insulation.
The furnace door is opened and closed using a gear and rack drive mechanism, which allows for flexible and convenient operation.

Q: 11. What is the high temperature of a vacuum furnace?

A: The high temperature of a vacuum furnace can vary depending on the specific model and application. However, based on the references provided, high temperature vacuum furnaces are capable of operating at temperatures up to 3000°C (5432°F). These furnaces are designed to create a vacuum atmosphere to prevent contamination and oxidation of the materials being processed. The ability to achieve uniform heating across the entire workpiece is crucial for producing high-quality materials with consistent properties. The high temperature vacuum furnace is commonly used in various industrial processes such as heat treatment, sintering, brazing, and annealing.

Q: 12. What is a high temperature furnace?

A: HTFs are a specialized type of industrial furnace defined by their ability to reach exceedingly high temperatures, usually between 1800 and 3000 °C.

Q: 13. What is the temperature of a vacuum furnace?

A: Characteristics of a vacuum furnace are: Uniform temperatures in the range. 800–3,000 °C (1,500–5,400 °F) Commercially available vacuum pumping systems can reach vacuum levels as low as 1×10−11 torrs (1.3×10−11 mbar; 1.3×10−14 atm).

Q: 14. What is a high temperature vacuum sintering furnace?

A: These furnaces are equipped with electrical resistance heating or with inductive heating. They can be used for numerous purposes because they apply vacuum as well as inert atmospheres.

Q: 15. What is a hot zone in a vacuum furnace?

A: The hot zone is by far the most critical component of your vacuum furnace as it is the functional core. Hot zone designs and internal supports and hardware need to be designed with consideration to low mass and specific heat wherever possible to avoid hot zone energy absorption.

Q: 16. How many types of quenching are there?

A: The types of quenching include induction heating surface quenching, flame heating surface quenching, electrolyte quenching, and laser quenching. Rapid heating of the workpiece causes rapid phase change of the surface tissue and transforms it into unique properties, which is called surface heat treatment.

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