Fragmentation device

Ammunition and explosives – Igniting devices and systems

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F42B 1318, F42B 1348

Patent

active

039569896

ABSTRACT:
A high explosive device with improved fragmentation is provided with a wall of wrought steel having a ferrite-martensite microstructure. This is obtained by heating in a temperature range in the ferrite-austenite region of the iron-carbon phase diagram until equilibrium is established between the two phases, and then quenching to retain the ferrite and transform the austenitic phase to martensite for said microstructure.

REFERENCES:
patent: 1985456 (1934-12-01), Nelson
patent: 2044780 (1936-06-01), Hardigg
patent: 2411862 (1946-12-01), Arnold
patent: 2763545 (1956-09-01), Breeler
patent: 2789928 (1957-04-01), Wallerius
patent: 2805466 (1957-09-01), Lyon
patent: 3117041 (1964-01-01), Koistinen
patent: 3178324 (1965-04-01), Grange et al.
patent: 3271207 (1966-09-01), Davis
patent: 3288657 (1966-11-01), Morita et al.
patent: 3378367 (1968-04-01), Lars-Eije Friis et al.
MacConochie, Steel Shell Manufacture, Ordnance, Vol. 39, No. 310, May-June 955, pp. 995-1001.
1953 ASM Paper No. 27, Klinger, Barnett, Frohmberg, & Troiano, The Embrittlement of Alloy Steel at High Strength Levels.

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