Hardened tempered wire rod as reinforc- - ments

摘要

Rod is cold hardened by bending or twisting then tempered between 100-300 degrees C. Steel wire rods containing >0.008% O2 are cooled from rolling temps. at a rate >10 degrees C/min to 150-550 degrees C. The rod so produced is used as a reinforcement for e.g. cement, plastic and shows an increase in yield point and elongation.