Home / News / How To Select Vacuum Furnace Products?

How To Select Vacuum Furnace Products?

Jun. 14, 2023

How To Select Vacuum Furnace Products?

The selection of the vacuum furnace mainly involves the pumping speed of the vacuum pump and the selection of the material of the heating chamber. The most suitable product equipment can be selected by comprehensively considering the use range of the product vacuum, the material processing temperature and other factors.

 

1. Vacuum Selection

The working vacuum degree should be selected according to the material and the heating temperature. First, the working vacuum degree required by non-oxidizing heating must be met, and then the surface brightness, degassing, and alloy element evaporation should be considered comprehensively. The recommended working vacuum degree for common material vacuum treatment is as follows:

 

Vacuum heat treatment

Recommended working vacuum

Vacuum brazing

Recommended working vacuum

Steel

1-10-1 Pa

Aluminum products

10-3Pa

Stainless steel, high temperature alloy

10-2 -10-3 Pa

Copper base products

10-1 -10-2 Pa

Titanium alloy

10-3Pa

Nickel-based products

10-2 -10-3 Pa

Copper alloy

133-13.3 Pa

Multicomponent alloy product

10-1 -10-3Pa

 

2. Selection of heating and thermal insulation materials

The equipment can choose different heating elements and heat insulation layers according to different operating temperatures. The commonly used heating element materials are heat-resistant steel (Cr20Ni80), high-purity graphite, molybdenum and alloys, tungsten and alloys, etc. The temperature range is as follows. In addition to the selection of the above materials, it is necessary to comprehensively consider the energy consumption and stability under long-term use.

 

Operation Temperature

Heating element selection

Insulation layer selection

850℃ and below

Heat resistant steel (Cr20Ni80)

Heat resistant steel +

Stainless steel

850℃-1100℃

Molybdenum metal or heat resistant steel

Molybdenum metal + Stainless steel

Molybdenum metal + graphite felt

1100℃-1300℃

Molybdenum-lanthanum alloy

Molybdenum-lanthanum alloy + Stainless steel

High purity graphite

Graphite soft felt +Graphite hard felt

1300℃-1600℃

Isostatic graphite

Graphite soft felt +Graphite hard felt

Tungsten alloy

Tungsten alloy+Molybdenum-lanthanum alloy + Stainless steel

1600℃-2100℃

Isostatic graphite

Graphite soft felt +Graphite hard felt

Tantalum

Tantalum+Molybdenum-lanthanum alloy + Stainless steel

 

3. Meaning of equipment model

J: The first letter of the company's English name V:The first letter of vacuum

 

Furnace Type

Examples

Meaning

JVOQ series double-chamber oil quenching vacuum furnace

JVOQ966M Molybdenum heating chamber double-chamber oil quenching vacuum furnace

OQ: Oil quenching abbreviations

966: Effective zone size

M: Molybdenum heating chamber

JVGQ series high pressure gas quenching vacuum furnace

JVGQ2-966M-10bar

10bar Molybdenum heating double-chamber high-pressure gas quenching furnace

GQ:Gas quenching abbreviations

966: Effective zone size

M:Molybdenum heating chamber

10bar:Gas quenching pressure

JVAF series annealing vacuum furnace

JVAF966

AF:annealing furnace abbreviations

966:Effective zone size

JVTF series tempering vacuum furnace

JVTF966

TF:tempering furnace abbreviations

966:Effective zone size

JVAB series aluminium brazing vacuum furnace

JVAB3511

AB:Aluminium brazing abbreviations

3511:Effective zone size

JVHB series high temperature brazing vacuum furnace

JVHB966

HB:High temperature brazing abbreviations

966:Effective zone size

JVDB series diffusion bonding vacuum furnace

JVDB966

DB: diffusion bonding abbreviations

966:Effective zone size

JVSF series sintering vacuum furnace

JVSF966

SF: Sintering furnace abbreviations

966:Effective zone size

JVLF series laboratory vacuum furnace

JVLF211

LF:Laboratory furnace abbreviations

211:Effective zone size

 

Note: Vertical vacuum furnace add V (Vertical) after the above model letters.

 

 

  • wechat

    Nina . Liu: +86 151 3032 0919