高品质贝氏体钢的贝氏体铁素体和碳化物  

Bainitic Ferrite and Carbide of High Quality Bainitic Steels

作　　者：李凤照[1,2] 敖青[1,2] 姜江[1,2] 顾英妮[1,2] 李斗星[1,2] 

机构地区：[1]山东工业大学材料科学与工程学院 [2]中国科学院金属研究所固体原子像开放研究实验室

出　　处：《金属热处理》1998年第8期3-5,14,共4页Heat Treatment of Metals

基　　金：山东省自然科学基金

摘　　要：研制的贝氏体钢在铸态、锻后空冷和锻后正火回火后均可获得以贝氏体或贝氏体／马氏体为主的组织。加入微量元素使贝氏体组织细化。微合金化的贝氏体（包括马氏体）呈隐晶或细针状。贝氏体铁素体中有位错、亚结构、孪晶和层错等丰富的精细结构，碳化物弥散分布于贝氏体铁素体条间、片内、亚条间和亚块边界。微合金化所产生的细晶强化和弥散强化对改善贝氏体钢的组织和性能作出了重要贡献。The main structure is bainite or bainite/martensite after casting,forging and air cooling,and forging,normalizing and tempering There are carbides and a small amount of retained austenite The structure is fine and uniform The addition of micro alloying elements can further fine the bainitic structure The bainite (including martensite) treated by micro alloying elements is hidden crystal and fine needles There are the dislocations,subunits,twins and stacking faults abundant fine structures The carbides differ in morphologies and are dispersion distributed in between laths,inside the plates and on the boundaries of subunits The fine crystal strengthening and carbide dispersion strengthening treated by micro alloying elements make the important contribution for improving the structure and properties of the bainitic steels

关 键 词：微合金化 贝氏体钢 组织细化 弥散强化 钢 

分 类 号：TG142.2[一般工业技术—材料科学与工程]