Heat treatment of welds

Details Heat treatment of welds Heat treatment of welds

1974-11-18

1976-12-14

Steiner, Arthur J.

Metal treatment

Process of modifying or maintaining internal physical...

Magnetic materials

148 34, 228238, C21D 166, C21D 950

Patent

active

039973743

ABSTRACT:
A method is disclosed for heat treating the weld and heat affected zone between a metal pipe and a metal connector. The overall strength of the assembly in the heat affected zone of the weld is brought to a value higher than, or at least matching, that of the strength of the pipe body in a manner to avoid cracking and to insure that the weld or the heat affected zone does not fail. After welding in the conventional manner, the weld is cooled below the transformation temperature, heated above the critical temperature, quenched at a selected rate that avoids cracking and refines the grain structure, followed by tempering, all of which improve the mechanical properties.

REFERENCES:
patent: 1704410 (1929-03-01), Stedefield
patent: 2032977 (1936-03-01), Delachaux
patent: 2133926 (1938-10-01), Ransom et al.
patent: 2564391 (1951-08-01), Burns
patent: 2834871 (1958-05-01), Berg
patent: 3192080 (1965-06-01), Cooper
patent: 3294599 (1966-12-01), Huseby
patent: 3556877 (1971-01-01), Ujiie

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