Effects of Chemical Composition and Cooling Process on Structures and Properties of Direct-Quenched Steels

作     者：DONG Han LI Gui Fen GAO Wei DU Jin Kai 

作者机构：Central Iron and Steel Research Institute Dalian Steel Works 

出 版 物：《Journal of Iron and Steel Research International》 (钢铁研究学报(英文版))

年 卷 期：1995年第2卷第1期

页      面：35-40页

核心收录：

学科分类：08[工学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 

主　　题：direct-quenched steel chemical composition cooling process 

摘      要：The microstructures and mechanical properties of a series of direct-quenched steels containing,in weight percent,from 0.05 to 0.20 carbon,0.20 to 0.40 silicon,1.10 to 1.70 manganese and at least one microalloying element of vanadium,niobium,titanium and boron have been *** controlled rolling,these steels were cooled in spray water to 400,300 and 200℃,respectively and then cooled in still *** of the Charpy V-notch impact toughness of direct-quenched steels without subsequent tempering was made with that of direct-quenched steels tempered at 600℃.It is found that an attractive combination of strength and toughness is achived by means of *** exists two types of microstructures in accordance with carbon *** martensitic microstructure is obtained for C0.4%,granular bainitic microstructures for C. 0.35%and mixtures of martensite and bainite for C,.in the range of 0.35— 0.40%.The effect of interrupted quenching temperature on microstructure is not significant for low ***,but interrupted quenching temperature has a strong effect on microstructure for high C,.steel.