碲对硫化物轧制变形行为影响的研究  

Effect of tellurium on the deformation of sulfides in rolling process

作　　者：沈平 王冬[2] 张浩 杨乾坤 艾克南 曾志崎 付建勋 Shen Ping;Wang Dong;Zhang Hao;Yang Qiankun;Ai Kenan;Zeng Zhiqi;Fu Jianxun(Center for Advanced Solidification Technology(CAST),State Key Laboratory of Advanced Special Steel,School of Materials Science and Engineering,Shanghai University,Shanghai 200444,China;Angang Steel Co.,Ltd.,Anshan 114000,Liaoning,China)

机构地区：[1]上海大学材料科学与工程学院,先进凝固技术中心,省部共建高品质特殊钢冶金与制备国家重点实验室,上海200444 [2]鞍钢股份有限公司,辽宁鞍山114000

出　　处：《钢铁钒钛》2021年第3期180-186,共7页Iron Steel Vanadium Titanium

基　　金：国家自然科学基金资助(编号:51874195、52074179)。

摘　　要：采用扫描电镜对38MnVS6钢中Te的赋存状态进行了分析,采用Gleeble-3500模拟了轧制过程。对MnS夹杂和基体的硬度进行了检测,并对夹杂物进行了统计,由此对夹杂物的变形行为进行研究。结果表明,少量的Te首先固溶在MnS中,当Te含量超过130×10^(-6)时开始析出MnTe。经过热压缩后,随着Te含量的增加,夹杂物的长宽比从2.3逐渐降低至1.8左右。钢中Te含量增加,夹杂物与钢基体的硬度比H_(夹)/H_(钢)基本为一个常数,不能造成夹杂物的抗变形能力增加。经过热压缩后,较小的夹杂物其长宽比也较小。钢中加Te后可使夹杂物尺寸减小,进而减小了夹杂物的变形量,抑制了轧制过程中夹杂物的变形。Modification of MnS inclusion by Te is one of the most efficient methods to improve the morphology and distribution of MnS inclusions.However,previous researches did not generate acceptable opinions on the deformation behaviors of MnS inclusions during the rolling process after adding Te.In the present study,the existing form of Te in the 38 MnVS6 steel was detected by SEM-EDS.Gleeble-3500 was employed to simulate the rolling process.The hardness of MnS inclusions and steel matrix was measured and the statistics of inclusions were performed to analyze the effect of Te on the deformability of inclusions.The results show that Te initially dissolves in MnS inclusion after adding a small amount of Te.When the Te content reaches 130×10^(-6),MnTe starts to generate.After hot-pressing,the inclusions were deformed.With the increase of Te content,the aspect ratio of inclusions decreases from 2.3 to approximately 1.8 and gradually reaches a constant value.The hardness determination result indicates that the deformation resistance of inclusions is not caused by the increase of inclusion hardness,since the hardness ratio H_(inclusion)/H_(matrix) keeps relatively constant after adding different Te content.The statistics of inclusions prove that the inclusion with a small diameter shows low aspect ratio after hot-pressing.The addition of Te can reduce the size of inclusions,leading to less deformation of inclusions.

关 键 词：38MnVS6 TE MnS夹杂 GLEEBLE 

分 类 号：TF76[冶金工程—钢铁冶金] TG335[金属学及工艺—金属压力加工]