薄板坯连铸连轧30CrMo钢的热轧组织与力学性能  

Microstructure and mechanical properties of a hot-rolled 30CrMo steel produced by compact strip production

作　　者：黄刚[1] 温德智[2] 焦国华[2] 周春泉[2] 周明伟[2] 陈建新[2] 吴开明[1] 

机构地区：[1]武汉科技大学湖北省冶金工业过程系统科学重点实验室,湖北武汉430081 [2]湖南华菱涟源钢铁有限公司,湖南娄底417009

出　　处：《材料热处理学报》2011年第6期109-113,共5页Transactions of Materials and Heat Treatment

基　　金：湖南省重大科技专项"CSP工艺生产高强度钢的研究与示范"资助项目(06GK4021);教育部新世纪优秀人才支持计划(NCET-05-0680);湖北省自然科学基金计划青年杰出人才项目(2006ABB037);湖北省教育厅国际合作项目(200711001)

摘　　要：利用光学显微镜、扫描电子显微镜(SEM)、透射电子显微镜(TEM)、拉伸试验机和硬度仪分析了薄板坯连铸连轧生产的30CrMo钢的热轧微观组织和力学性能。结果表明,该钢主要由珠光体和铁素体组成,珠光体的表观片层间距在0.5μm以下,铁素体晶粒尺寸在5μm以下。该钢热轧屈服强度为461 MPa,抗拉强度达677 MPa,硬度为96.8 HRB,伸长率达23%。与传统厚板坯连铸工艺生产的30CrMo钢热轧组织比,CSP工艺生产的30CrMo钢的组织更细小,综合性能更优良。As-rolled microstructure and mechanical properties of 30CrMo steel produced by CSP were studied by means of optical microscopy,scanning electron microscopy（SEM） and transmission electron microscopy（TEM）,tensile testing and hardness measurement.Results show that fine microstructure of the 30CrMo steel produced by CSP process is obtained,which consists of pearlite with interlaminar spacing less than 0.5 μm and ferrite with grain size less than 5 μm.The yield strength,tensile strength,hardness and total elongation of the as-rolled 30CrMo steel strip are 461 MPa,677 MPa,96.8 HRB and 23.0%,respectively.Compared with conventional process,hot-rolled 30CrMo steel strip produced by CSP process exhibit have finer microstructure and better mechanical properties.

关 键 词：薄板坯连铸连轧 CSP 珠光体 铁素体 高强度钢 

分 类 号：TG135.1[一般工业技术—材料科学与工程] TG142.2[金属学及工艺—合金]