SCARFING METHOD FOR STEEL MATERIAL AND SCARFING DEVICE FOR STEEL MATERIAL

Japanese Patent JP2022167017

A

To provide a scarfing method for a steel material that can stably scarf a surface of a steel material making scarfing depth shallow and uniform.SOLUTION: A scarfing method for a steel material, scarfs a surface of the steel material using a scarfer unit that has a preheating-gas jetting part that jets flammable gas and oxygen for preheating and a scarfing-oxygen jetting part that jets oxygen for scarfing. The method is configured to jet front-side shield gas composed of flammable gas and oxygen to a front side in a progressing direction of scarfing at a fire point formed resulting from oxidation reaction of the oxygen for scarfing with the steel material and jet rear-side shield gas composed of flammable gas to a rear side in the progressing direction of scarfing at the fire point, in a scarfing step. In the scarfing step, a gas quantity Q of the rear-side shield gas is set in accordance with an area S (mm2) of a gap between the scarfer unit and the steel material on a cross section orthogonal to an advancing direction of the steel material.SELECTED DRAWING: None

DOKI MASAHIRO
AOKI RIICHI
FUNAGANE HITOSHI

JP2021072507A

November 04, 2022

April 22, 2021

Click for automatic bibliography generation  

NIPPON STEEL CORP

B23K7/06; F23D14/56

Sumio Tanai
Mitsuo Teramoto
Tomomasa Katsumata
Hiroshi Yamaguchi

Previous Patent: DEVICE INSPECTION APPARATUS AND DEVICE INSPECTION METHOD

Next Patent: Steel cutting method and steel cutting device