中锰钢热塑性第Ⅲ脆性区原因分析  

Causes analysis on the thermoplastic brittle region Ⅲ of medium manganese steel

作　　者：王育田 王存宇[1,2] 石发才[1] 陶红标[3] 

机构地区：[1]太原钢铁(集团)有限公司技术中心,山西太原030003 [2]钢铁研究总院华东分院,北京100081 [3]钢铁研究总院连铸中心,北京100081

出　　处：《连铸》2015年第6期67-69,共3页Continuous Casting

基　　金：国家973项目(2010CB630800)

摘　　要：中锰钢连铸坯容易出现角横裂。用Gleeble热模拟试验机研究了中锰钢热塑性,并通过微观组织表征和热力学分析研究了第Ⅲ脆性区原因。结果表明,中锰钢在550~775℃出现第Ⅲ脆性区,形变诱导铁素体相变导致变形温度750℃的样品塑性最低。实际生产中应控制二冷区水量,提高连铸坯角部温度避免角部裂纹。Transverse corner crack is likely to occur on slab of medium manganese steel. The thermoplastic of medium manganese steel was studied using Gleeble thermal-mechanical simulator,and the causes of the brittle region Ⅲ were analyzed through microstructure characterization and thermodynamics analysis. The results show that the brittle regionⅢwas occurred at the temperature of 550-775 ℃,and the ferrite phase transformation induced by deformation cause the lowest thermoplasticity at the deformation temperature of 750 ℃.Therefore,at the practical process,the quantity of water in the secondary cooling zone of continuous casting should be controlled carefully to avoid the corner crack of continuous cast billet.

关 键 词：中锰钢 热塑性 连铸坯 

分 类 号：TF777[冶金工程—钢铁冶金]