变形量对环保型1214Bi易切削钢组织及夹杂物演变的影响  

Effect of deformation amount on microstructure and inclusion evolution of environmental friendly 1214Bi free-cutting steel

作　　者：李彬周 姜圆博 王一甲 邵志保 李长生[3] LI Binzhou;JIANG Yuanbo;WANG Yijia;SHAO Zhibao;LI Changsheng(State Key Laboratory of Metal Materials for Marine Equipment and Application,Anshan 114009,China;Ansteel Beijing Research Institute Co.,Ltd.,Beijing 102200,China;State Key Laboratory of Rolling and Automation,Northeastern University,Shenyang 110819,China)

机构地区：[1]海洋装备用金属材料及其应用国家重点实验室,辽宁鞍山114009 [2]鞍钢集团北京研究院有限公司,北京102200 [3]东北大学轧制技术及连轧自动化国家重点实验室,辽宁沈阳110819

出　　处：《轧钢》2024年第1期20-25,48,共7页Steel Rolling

摘　　要：为了研究轧制过程中不同变形量对环保型含铋易切削钢的微观组织演变和MnS夹杂物形貌及分布的影响规律,利用MMS-200热力模拟试验机对1214Bi易切削钢进行了单道次热压缩实验。结果表明:不同变形量对实验钢的显微组织构成没有显著影响;但是随着变形量的增加,小角度晶界比例先减少后增加,织构成分的演变规律为{001}<110>+{110}<001>→α织构+Cube织构→γ织构+α织构;当变形量小于30%时,MnS夹杂物的尺寸比较均匀,形状偏向于球形和纺锤形;随变形量增大,MnS夹杂物的偏聚严重,破碎程度也较大。In order to study the influence of different deformation amounts during rolling on the microstructure evolution and the morphology and distribution of MnS inclusions of environmental friendly Bi bearing free-cutting steel,a single pass hot compression experiment was carried out on the 1214Bi free cutting steel using the MMS-200 thermal simulation test machine.The results showed that different deformation amounts had no significant effect on the microstructure composition of the experimental steel,but with the increase of deformation amount,the proportion of small angle grain boundaries first decreased and then increased,and the evolution law of texture composition was{001}<110>+{110}<001>→αtexture+Cube texture→γtexture+αtexture.When the deformation amount was less than 30%,the size of MnS inclusions was relatively uniform,and their shapes tended to be spherical and spindle.When the deformation degree increased,the segregation of MnS inclusions was serious,and the degree of fragmentation was also large.

关 键 词：1214Bi易切削钢 热模拟 变形量 微观组织 MnS夹杂物 绿色环保 

分 类 号：TG142.1[一般工业技术—材料科学与工程]