The cold head steel bar which is composed of ferrite, pearlite and granular bainite was produced by controlled rolling and cooling.

• 摘要铆螺钢经棒材轧机控轧控冷轧成棒材，获得具有铁素体、珠光体和粒状贝氏体的混合组织，冷镦成螺栓后进行产品检验。