How to choose a vacuum pump for a vacuum furnace? Different vacuum pumps need to be selected based on the degree of vacuum.

Selection of Vacuum Degree

1. The vacuum (4X10-1P a) adopts two-stage pumps (front stage pump and Roots pump) for low vacuum treatment, such as vacuum heat treatment of bearing steel, mold steel, structural steel, etc.

2. For some products that require high vacuum, three-stage pumps (pre stage pumps, Roots pumps, diffusion pumps, etc.) can be selected. Generally, the vacuum degree required is between 10-4Pa. For example, vacuum heat treatment or high-temperature brazing of high-temperature alloys, titanium alloys, magnetic materials, etc.

Graphite reflective screen

There are generally two types of felt used in vacuum furnaces: hard felt and soft felt, which are suitable for quenching, tempering, and annealing of general steel. High temperature brazing, powder metallurgy, sintering, etc.

What metal insulation screens are commonly used in vacuum furnaces?

The metal screens commonly used in vacuum furnaces include stainless steel, molybdenum, tantalum, and tungsten.

Molybdenum reflective screens are suitable for quenching and annealing of materials with high temperature and high requirements for the furnace environment, such as high-temperature alloys, titanium alloys, magnetic materials, etc.

Stainless steel rice screen is suitable for tempering, low-temperature annealing, aging, vacuum aluminum brazing, and other low-temperature vacuum furnace types