Flame hardening

Flame hardening

This is one of the surface hardening methods and a hardening method to heat partly with fire like acetylene burners. It’s applicable from small parts to large parts and it costs less for the equipment but it requires a heat treatment skill.


 Heating with acetylene gas+Cooling (polymer)

Metallographic structure


Martensite Microstructure


Video Process to be done


The factroy is able to do

Numata Factory
Numata Factory

2-23-1 ohzuka-nishi, , Asaminami-ku,
Hiroshima-shi, 731-3167, Japan
Tel. +81-(0)82-848-6021
Fax. +81-(0)82-848-6301
Shiwa Factory
Shiwa Factory

190-1 Aza Fukasako, Kanmuri, Shiwa-cho,
Higashi-Hiroshima-shi, 739-0265, Japan
Tel. +81-(0)82-420-5511
Fax. +81-(0)82-420-5615

Contact Us

Nagato Heat Treatment (Thailand) Co., Ltd.
7 /379 Moo 6, Tambol Mabyangporn, Amphur Pluakdaeng, Rayong, Thailand
Tel. +66-(0)38-027-473  Fax. +66-(0)38-027-475