卤化物合成粉剂喷吹处理16Mn压力容器钢脱氢机理新探

NEW APPROACH ON MECHANISM OF DEHYDROGENATION OF 16Mn VESSEL STEEL TREATED WITH SYNTHETIC HALOGENIDE POWDER INJECTION

本文从冶金物理化学原理出发,分析了钢包喷吹卤化物合成粉剂对16Mn压力容器钢处理的基本反应过程。建立起氯势图,提出“择优氯化”的概念,用计算机算出平衡条件下各元素与氯的亲合力顺序。理论分析和实验室实验证实,钢中氢的去除是通过生成的氯盐气泡将其吸收带出的。这与以前的观点不同,只要不影响粉剂流动性,卤化物加入量越多越有利于脱氢。为工业生产合理应用这一新型粉剂提供了具有实用价值的理论依据。

In this paper, the basic reaction mechanism of ladle injection treatment of 16Mn steel for pre-ssure vessels with synthetic halogenide powder is analyzed based on principles of physical chemi-stry of metallurgy. The chlorine potential diagram was drawn up and the conception of selectivechlorination was proposed. The affinity order of some elements to chlorine was worked out withcomputer. Both the theoretical analysis and the lab experiment prove that the dehydrogenation ofthe steel is achieved by absorption of chloride gas bubbles produced in the ladle, which is different from the prevailing theory. The more halogenide added, the better dehydrogenation was prov-ided that the fluidity of the melted powder remains unchanged. Thus, a reasonable theory is off-ered for the industrial application of the new powder.