Since its establishment in 1964, Ohtama Co., Ltd. has been recognized in the industry as a maker specialized in magnetic shielding with Permalloy

Japanese
OHTAMA CO.,LTD. Product
Products and services
Magnetic shielding /
shield parts
Magnetic shield room/
chamber
Magnetic field canceller
Magnetic field environment measurement service
Heat treatment
Home > Products and services > Heat treatment Back

Heat treatment

Once Permalloy is treated by heat, its magnetic characteristics are (greatly) improved. The principal purpose of “annealing” is to soften a metal for homogenizing it, or making its machining or plastic working easier. But, as to Permalloy, the main purpose of annealing is to improve its magnetic characteristics and eliminate/decrease a residual stress after processing (such as press working, welding, bending, cutting work, etc.).

Inquiries
Hydrogen atmosphere furnace
Heat treatment is conducted in a furnace heated to a high temperature and filled with hydrogen gas.
Hydrogen atmosphere furnace
Photo
Hydrogen purity 99.99% Dew point = 45 degrees Celsius
Hydrogen gas pressure Outside air (its pressure is to be raised a little)
Temperature 1,050 ~ 1,100 degrees Celsius
Holding time 2 hours ~
Page Top
Vacuum furnace
A furnace is made highly vacuum. Then, high-temperature heat treatment is conducted in the furnace into which a very small volume of hydrogen gas is being supplied.
Vacuum furnace A vacuum furnace, in which heat treatment is being conducted
Photo
Hydrogen purity 99.99% Dew point = -45 degrees Celsius
In-furnace pressure (vacuum) < 10^-3 Torr
In-furnace pressure (hydrogen) ≒ 10^-1 Torr
Temperature 1,050 degrees Celsius
Holding time 2 hours ~
Inquiries
Page Top
Site map Site Policy Copyright(c)OHTAMA co.,ltd. All Rights Reserved.