Use of Alloy Steels in Rock Drilling, and Their Treatment
CHARLES G. KEMSLEY
IN view of the truly remarkable development of special steels for special purposes, the mining industry has for years looked forward to a time when steel makers would come forward with a product which would be an improvement over the straight carbon steel which has always held the field for drilling rock. In order to avoid making changes in conventional shop practice, the industry has perhaps been too insistent upon obtaining a water hardening steel which could be handled in the blacksmith shop by long established methods.
Mots Clés:
alloy steel, carbon steel, octagon, rock drill, shanks, Alloy steels, Alloys, Bits, Drill, Drilling, Drills, Rock, steel, Steels
