Journal Published Online: 21 November 2012
Volume 1, Issue 1

Fast Primary Cooling: Alternative to Lead Baths for High-Carbon Steel Wire Patenting



Using non-toxic cooling media for patenting high-carbon steel wire is of industrial importance in view of current regulations related to human toxicity and environmental pollution problems presented by conventional molten lead bath patenting processes. The cooling behavior of 0.70 % carbon steel wire upon patenting using a lead bath and aqueous solutions of CMC (carboxyl methyl cellulose) polymer were investigated previously. The cooling process and the transformation behavior of the wire were interpreted using curve analyses. The experimental results showed that the high-carbon steel wire can complete the sorbite–pearlite transformation in the aqueous 0.25 % CMC solution, but the transformation temperature is higher and the transformation time is longer than that observed for lead patenting because of the continuous cooling transformation process in the fluid used as an alternative to molten lead. In accordance with the cooling requirement of the patenting process and the cooling characteristics of aqueous polymer solutions, a key point in the adoption of alternatives to molten lead is that the cooling process should be controlled to accelerate the cooling rate during the primary cooling stage and maintain the steady transformation temperature for austenitized steel wires.

Author Information

Luo, Xinmin
School of Material Science and Engineering, Jiangsu Univ., Zhenjiang, Jiangsu, CN
Chen, Kangmin
School of Material Science and Engineering, Jiangsu Univ., Zhenjiang, Jiangsu, CN
Totten, George
Dept. of Mechanical Engineering, Texas A&M Univ., TX, US
Pages: 13
Price: $25.00
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Stock #: MPC20120006
ISSN: 2165-3992
DOI: 10.1520/MPC20120006