Effective boron alloying additive for continuous casting fine gr

Details Effective boron alloying additive for continuous casting fine gr Effective boron alloying additive for continuous casting fine gr

1978-12-08

1980-11-11

Rutledge, L. Dewayne

Specialized metallurgical processes, compositions for use therei

Processes

Free metal or alloy reductant contains magnesium

75 53, 75123L, 75129, 75134F, C21C 700, B22D 2718, B22D 2102

Patent

active

042330653

ABSTRACT:
An effective alloying additive for adding small (5-30 ppm) quantities of boron to steel which is continuously cast, said additive containing 0.5-1.5% boron, 8-15% calcium, 8.5-20% titanium, 40-60% silicon, up to 1.5% of aluminum, and balance iron.
The additive makes possible continuous casting of boron steel without the tundish nozzle-clogging problem associated with aluminum-killed steel, and the cast steel contains sufficient soluble boron to provide a good hardenability effect.

REFERENCES:
patent: 3331680 (1967-07-01), Leupold
patent: 3383202 (1968-05-01), Lynch
patent: 3512957 (1970-05-01), Brotzmann et al.
patent: 3540518 (1970-11-01), Osterholtz
patent: 3623862 (1971-11-01), Spengler et al.
patent: 3718173 (1973-02-01), Snow
patent: 3822735 (1974-07-01), Miltenberger et al.
patent: 3841861 (1974-10-01), Miltenberger
patent: 3922166 (1975-11-01), Koros et al.
patent: 3935895 (1976-02-01), Fastner et al.
patent: 4015655 (1977-04-01), Fastner et al.
Foote Notes on Steel, No. 1, 1974, Published by Foote Mineral Co., Exton, Pa.
Foote Notes on Steel, No. 2 and 3.
". . . Deoxidation . . . Castability . . . Steel", Met. Soc. IRSID Conf. on Continuous Casting, Biarritz, May 1976.

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