Main examples of newly developed wire rods produced by the n-line heat treat- ment such as the In-line QT wire rods of middle carbon an low alloy steels manu- factured in Muroran works and the Bainitic wire rods of high carbon steels in Kimitsu works are introduced. The former manufactured by the combination of controlled cooling by spraying of cold or hot water and In-line tempering has homogenous properties free from cracks during cooling.
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