研究包括加热工艺、控轧制度和控冷工艺在内的经济型X80管线钢工艺技术.结果表明,通过控制加热温度不超过1180℃,奥氏体晶粒尺寸可控制在80μm以内.通过提高粗轧阶段最后1个道次的压下率,使其达到20％以上,可使钢板心部奥氏体晶粒得到充分细化;通过降低终冷温度和提高冷却速率等工艺参数,可得到细小的板条贝氏体和针状铁素体组织;采用JCOE工艺制管后,X80屈服强度提高,为降低产品生产成本提供了可能.目前,该公司已实现无钼经济型X80管线钢的稳定生产.
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