MULPIC冷却装置在品种钢研发中的生产实践

 舞钢新宽厚板生产线MULIPIC在线快冷装备具有高冷却速度等技术特点，结合控制轧制和在线快冷装备对船板、管线钢进行了开发研究，采用直接淬火工艺研究开发了高强工程机械用钢。结果表明： 60 mm厚度E36级TMCP船板钢，组织全部为铁素体＋珠光体，晶粒度10级以上，－40 ℃夏比横向冲击功在183 J以上；X70管线钢的组织为针状铁素体，力学性能合格率达98％；利用直接淬火（DQ）和离线回火工艺，生产出30 mm厚的WQ960D调质钢，屈服强度达到960 MPa，抗拉强度1030 MPa，－20 ℃纵向冲击功在43 J以上。

Practice of Using MULPIC Cooling Device in Development of High Grade Steel

The MULPIC online cooling device in heavy plate mill of Wuyang Iron and Steel Co., Ltd. is endowed with high cooling rate. The ship plate, pipeline steel is developed by means of the controlled rolling and online accelerated cooling processes, and high strength engineering steel is researched and produced with direct quenching. The results are as follows: The microstructure is ferrite and pearlite, grain size is grade 10 of ASTM and -40 ℃ Charpy transverse toughness is above 183 J of the developed E36 ship plate by TMCP, the thickness of which is 60 mm. The microstructure is acicular ferrite and the qualified ratio is 98% in the developed X70 pipeline steel. The high strength steel W960D with the thickness of 30 mm is produced by the direct quenching and off line temper process with 960 MPa yield strength, 1030 MPa tensile strength and -20 ℃ Charpy longitudinal toughness above 45 J.