Title: Metallurgical behaviours of high-carbon steel wires in lead bath and CMC aqueous solutions by cooling curve analysis

Authors: Xinmin Luo, Fang Li

Addresses: School of Material Science and Engineering, Jiangsu University, 301 Xuefu Rd, Zhenjiang, Jiangsu 212013, P.R. China. ' School of Material Science and Engineering, Jiangsu University, 301 Xuefu Rd, Zhenjiang, Jiangsu 212013, P.R. China

Abstract: The cooling process of 0.70% carbon steel wires upon patenting in lead baths and CMC (Carboxyl Methyl Cellulose) aqueous solutions was measured respectively with the steel wire probes. The cooling process and the transformation behaviours of the wires, upon patenting, were interpreted by cooling curve analyses. It is the coherence of the |mass effect| of steel wires and the thermal diffusion ability in cooling media that dominates the patenting process and the transformation behaviours of the wires. The high carbon steel wires could fulfil the transformation to pearlite in the 0.25% CMC aqueous solution. But the transformation temperature is higher than that in lead patenting due to its attribution of continuous cooling transformation. According to the cooling essence for patenting and the cooling characteristics of the CMC aqueous solutions, the adoption of the alternative should be focused on accelerating the cooling of the primary stage for patenting.

Keywords: cooling curve analysis; patenting; carboxyl methyl cellulose; CMC; lead baths; polymer; phase transformation; high-carbon steel; steel wires; sorbite; pearlite; primary ferrite; metallurgical behaviour; thermal diffusion; quenching.

DOI: 10.1504/IJMPT.2005.007945

International Journal of Materials and Product Technology, 2005 Vol.24 No.1/2/3/4, pp.142 - 154

Published online: 06 Oct 2005 *

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