超细化Mn-Mo-Nb-B低碳贝氏体钢轧制过程组织性能  

Study on Microstructure and Properties of Ultra-Fine Mn-Mo-Nb-B Low Carbon Bainitic Steel

作　　者：梁国俐[1] 苑少强[1] 张晓娟[1] 刘义[2] 

机构地区：[1]唐山学院机电工程系,河北唐山063000 [2]唐钢集团,河北唐山063016

出　　处：《河北理工大学学报（自然科学版）》2010年第2期16-18,共3页Journal of Hebei Polytechnic University:Social Science Edition

基　　金：河北省自然科学基金-钢铁联合研究基金资助(E2008001141)

摘　　要：通过合理的成分设计、优化的TMCP工艺,获得了超细化的针状铁素体/贝氏体复合组织,其奥氏体晶粒平均扁平厚度小于5μm,贝氏体板条束小于1μm,同时,其抗拉强度R_m大于1000 MPa,断裂总延伸率A大于14%,-30℃冲击功A_(kv)为120J以上。The ultra-fine acicular ferrite/bainite microstructures were obtained through proper chemical composition design and optimizing TMCP technology.The size of bainitic packets less than 1μm and the average pancake thickness of austenitic grain less than 5μm were produced.The comprehensive properties that tensile strength R_m1000MPa,the percentage enlongation A14%and charpy notch impactA_（kv）120J（-30℃） have been achieved.

关 键 词：超细化 针状铁素体/贝氏体 奥氏体扁平化 

分 类 号：TG145[一般工业技术—材料科学与工程]