High strength steel rod of large gage

Details High strength steel rod of large gage High strength steel rod of large gage

C - Chemistry, Metallurgy

21

D

13/1, 148/48

C21D 9/00 (2006.01) C21D 8/06 (2006.01) C21D 9/52 (2006.01) C22C 38/18 (2006.01)

Patent

CA 1045957

ABSTRACT OF THE DISCLOSURE This invention relates to a novel high strength steel rod of a large gage, which is made of a high carbon steel containing, by weight percent, from 0.65 to 0.90% carbon and from 0.15 to 1.5% chromium capable of wire drawing without subsequent heat treatment and has a diameter of not less than 9 mm. For producing this high strength steel rod, a high carbon steel after hot rolling is subjected to the so-called controlled cooling process, in which the rod rolled subjected to a phase transformation by the use of air cooling-medium under a controlled cooling condition. Thus, the rod obtained presents a structure consisting essentially of fine pearlite and has a tensile strength of above 115 kg/mm2. The steel rods of the present invention possess high tensile strength and are easily drawable into steel wire without the necessity for reheat treatment.

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