Welding for spheroidal graphic cast iron material

Details Welding for spheroidal graphic cast iron material Welding for spheroidal graphic cast iron material

1995-12-07

1997-10-21

Ramsey, Kenneth J.

Metal fusion bonding

Process

Plural filler applying

228232, 2282624, 219137R, B23K 9235

Patent

active

056787537

ABSTRACT:
The invention relates to the welding of cast-iron castings.
The process for the fusion welding of spheroidal-graphite cast-iron castings comprises the following steps:
a) a preheat at a temperature of between 230.degree. and 300.degree. C. is carried out before buttering the zone of the casting to be welded;
b) a heat treatment at a temperature of between 800.degree. and 920.degree. C. is applied to the buttering for a suitable period and .then a cooling cycle is carried out;
c) again, a preheat of the buttering is carried out at a temperature of between 130.degree. and 200.degree. C. and followed by a finish weld.
Application to the repair of cast-iron castings and to the joining of cast-iron castings together or to steel castings.

REFERENCES:
patent: 2444654 (1948-07-01), Kihlgren
patent: 2499827 (1950-03-01), Kihlgren
patent: 3196537 (1965-07-01), Groman et al.
patent: 3778588 (1973-12-01), Bishel
patent: 4817859 (1989-04-01), Bretenmoser

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