C - Chemistry – Metallurgy – 22 – C
Patent
C - Chemistry, Metallurgy
22
C
75/138, 148/50.2
C22C 38/00 (2006.01) C21D 1/20 (2006.01) C21D 6/00 (2006.01) C22C 38/12 (2006.01) C22C 38/18 (2006.01) C22C 38/22 (2006.01)
Patent
CA 1137337
ABSTRACT OF THE DISCLOSURE A steel composition possessing both high toughness and strength, having the composition 0.50 - 1.00 % C, 0.10 - 1.50 % Si, 0.25 - 1.50 % Mn, max. 0.045 % P, max. 0.045 % S, en element selected from the group consisting of 0.20 - 0.90 % Mo and 0.20 - 2.00 % Cr, with the remainder being iron and normal impurities and which is formed by subjecting the composition to austempering in the temperature range of the martensite point or in the temperature range immediately above the martensite point to obtain a degree of transformation up to 85% Articles made from the composition are also disclosed, which include fastening devices such as screws, nails, bolts, rivets and the like, and machine parts and elements such as drills, shafts, dics, sprinas, and weapons and armour plate and marine and sporting articles such as chain, fish hooks, ski edges, and semi-manufactured articles such as wire, sheet metal, metal bar and tubes.
325474
Listemann Peter
Ritt Walter
Seghezzi Hans-Dieter
Zsalatz Reinhold
Hilti - Aktiengesellschaft
Rolston George A.
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