Metal treatment – Compositions – Heat treating
Patent
1987-02-25
1988-06-28
Stallard, Wayland
Metal treatment
Compositions
Heat treating
148 12D, C21D 800
Patent
active
047536918
ABSTRACT:
A method of directly softening a rolled machine structural steel is provided. This method is characterized by the fact that it comprises the steps of:
REFERENCES:
patent: 3285789 (1966-11-01), Grange et al.
patent: 3423252 (1969-01-01), Grange
Sato Hiroshi
Takahashi Toshihiko
Tarui Toshimi
Nippon Steel Corporation
Stallard Wayland
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