Abstract
Summary The thermo-processing of piano wire rods is carried out in the lead bath. This experimentation is carried out under industrial conditions. The investigation is done to examine the effect of austenitic time, lead bath time and wire diameter on mechanical properties of lead patented wire. The Taguchi technique is adopted for optimization of thermo-processing of hypereutectoid steel wires. The lead patented wire of diameter 7.00 mm is cold drawn in a sequence of conical converging dies. The best pass schedule of lead patented piano wire is obtained by optimizing the ultimate tensile strength and torsion strength of cold drawn wire. The characterization of wire drawing behaviour of lead patented wires is carried out using optical microscopy, scanned electron microscopy and X-ray diffraction analysis techniques.
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