大规格高强度SWRH82B盘条拉拔过程断丝原因分析  

Analysis of Broken Reasons for Wire of Big-Size and High Strengh SWRH82B During Drawed Process

作　　者：孔祥涛[1] 周德[1] 陈宏[2] 张宝全[2] 王立峰[1] 

机构地区：[1]首钢技术研究院,北京100043 [2]首钢第二炼钢厂,北京100041

出　　处：《钢铁》2012年第2期44-48,共5页Iron and Steel

摘　　要：首钢大规格高强度SWRH82B盘条在用户加工过程中脆断严重,与铸坯低倍角裂和皮下裂纹及盘条网状组织有关。经调查发现季节气温差异,导致铸机结晶器和二冷冷却强度相对较强。通过调整结晶器冷却水水量、二冷水比水量、更换性能合适的保护渣、转炉采用高拉碳操作工艺配合微氮增碳剂等综合措施,产品质量基本上达到大方坯工艺同等产品的质量要求。Shougang＇s big-size and high strength SWRH82B was broken during drawed process,which had relation with broken corner,subcutaneous crack of billet and wire of micro-section cellular structure.The intensity of cooling was improved for mold and secondary cooling by seasonal temperature.The product quality can meet requirements of bloom through adjusting cooling water of mold,regulating the secondary cooling water distribution,changing suitable characteristic mold powder,adopting catch carbon of finish point with micro-nitrogen carburant in converter.

关 键 词：大规格高强度SWRH82B 脆断 铸坯角裂 二冷冷却 

分 类 号：TG356[金属学及工艺—金属压力加工]