Metal treatment – Compositions – Heat treating
Patent
1980-03-27
1982-04-20
Skiff, Peter K.
Metal treatment
Compositions
Heat treating
148 12F, C21D 800
Patent
active
043257488
ABSTRACT:
Steel plate having an excellent resistance to hydrogen induced cracking is obtained from a continuously cast slab having the following composition, C 0.01-0.30% by weight, Si 0.05-0.60% by weight, Mn 0.40-2.50% by weight, Sol Al 0.005-1.00% by weight, S 0.003% and lower by weight, the weight ratio of Ca/S is 2-10, the remainder being substantially Fe, through the steps of hot primary reduction rolling the cast slab, heating it at the temperature of 1200.degree. C. or higher for 10 hours or longer, and ordinary rolling it.
REFERENCES:
patent: 3328211 (1967-06-01), Nakamura
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patent: 4138278 (1979-02-01), Nakasugi et al.
patent: 4153454 (1979-05-01), Emi et al.
Ohi et al., "Influence of Metallurgical Factors on Hydrogen Induced Cracking of Steel Sheet," Tetsu to Koh 63 Sep. 1977, S708.
Yamamori et al., "Resistance to Hydrogen Induced Cracking of Line Pipe by Addition of Ca" Tetsu to Koh 64, Mar. 1978, S289.
Terasaki, et al., "A Study of Factors Having Effect on Susceptivity to Hydrogen Induced Cracking and H.sub.2 Absorbing Props. of Line Pipe," Tetsu to Koh, 64, Sep., 1978, S836.
Inagaki et al., "Improvement of Resistance to H.sub.2 Induced Cracking by Controlled Transformed Structure," Tetsu to Koh 64 Sep. 1978, S838.
Kawai Toshihiko
Kobayashi Tsuneaki
Nagahata Tsutomu
Nashiwa Hajime
Takeyama Muneyoshi
Skiff Peter K.
Sumitomo Metal Industries Ltd.
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