Welding materials for high-Cr steels

US6290904A · kind A · utility

Assignee

• Mitsubishi Electric Corporation · JP

Inventors

• Takayuki Kawano · Kyoto, JP
• Kaneyasu Ishikawa · Nagasaki, JP
• Nobuhiko Nishimura · Nagasaki, JP
• Iwami Ishihara · Nagasaki, JP
• Mitsushige Kumou · Nagasaki, JP
• Tamao Takatsu · Tokyo, JP
• Takashi Inami · Suwa, JP

Key dates

• Filing date: Jan 20, 1999
• Grant date: Sep 18, 2001
• Expiry date: Jan 20, 2019

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C22C38/26
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

This invention relates to welding materials for high-Cr steels which exhibit higher toughness and improved creep characteristics. Specifically, this invention relates to a welding material for high-Cr steels which contains, on a weight percentage basis, 0.03 to 0.12% C, up to 0.3% Si, 0.2 to 1.5% Mn, up to 0.02% P, up to 0.01% S, 8 to 13% Cr, 0.5 to 3% Mo, up to 0.75% Ni, 0.15 to 0.3% V, up to 0.01% Nb, 0.05 to 0.3% Ta, 0.1 to 2.5% W, 0.01 to 0.75% Cu, up to 0.03% Al, 0.002 to 0.005% B, up to 0.015% N, and up to 0.01% O, the balance being Fe and incidental impurities. It also relates to such welding materials wherein W is optionally excluded from the aforesaid composition, wherein W is excluded and 0.1 to 3% Co is added, or wherein 0.1 to 3% Co is added to the aforesaid composition.