Drill resistant hard plate and method for manufacture thereof

Details Drill resistant hard plate and method for manufacture thereof Drill resistant hard plate and method for manufacture thereof

1992-02-07

1995-03-07

Shaw, Clifford C.

Electric heating

Metal heating

For deposition welding

219137WM, 109 85, B23K 904

Patent

active

053960416

ABSTRACT:
A highly drill-resistant element, suitable for inclusion into the walls and/or doors of a security container to resist drilling to access the contents of the container is formed by welding onto a steel plate formed of REPUBLIC 100-AR (TM) steel a layer of Tube BORIUM.RTM. material by a known tungsten-inert-gas (TIG welding process). The REPUBLIC 100-AR (TM) steel has a chemical composition and is manufactured to inherently possess a very high yield strength and abrasion resistance. The Tube BORIUM.RTM. material, welded by the thick process, provides a very hard and drill-resistant layer comprising a heterogenous suspension of tungsten carbide particles of selected size in a steel matrix.

REFERENCES:
patent: 4859541 (1989-08-01), Maxeiner et al.
patent: 5007326 (1991-04-01), Gooch, Jr. et al.
patent: 5147996 (1992-09-01), Carlin
Specification Sheet Titled "Borium, the Ultimate in Wear Resistance".
Specification Sheet Titled "Republic 100-AR Abrasion Resistant Steel Plate".

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