摘要
通过Aspex夹杂物自动分析仪和场发射扫描电镜系统研究了氩气保护气氛下1 200℃的热处理对硅锰脱氧18Cr-8Ni不锈钢中夹杂物的影响。研究发现,在热处理前,不锈钢中夹杂物主要为MnO-SiO2液态夹杂物,其中含有少量的Cr2O3和MnS。热处理过程中,钢基体中的铬将MnO-SiO2夹杂物中的SiO2和MnO还原,在MnO-SiO2夹杂物表面生成MnO·Cr2O3尖晶石夹杂物。最终,MnO-SiO2夹杂物被完全变性为纯MnO·Cr2O3尖晶石夹杂物。此外,通过FactSage热力学计算软件计算了在不同热处理温度和不同钢液成分下夹杂物的生成和转变相图,可为本文夹杂物的转变提供理论解释。
The evolution of inclusions in Si-Mn-killed 18Cr-8Ni stainless steels during the heat treatment was analyzed using Aspex inclusions analyzer and Field Emission SEM. During the heat treatment at 1 200℃ under an argon atmosphere, the [Cr] in the solid steel matrix reduces the SiO2 and MnO in MnO-SiO2-rich inclusions, and formed MnO-Cr2O3 spinel on the surface of MnO-SiO2-rich core phase. Finally, MnO-SiO2-rich inclusions were fully modified to pure MnO. Cr2O3 spinel in Si-Mn-killed stainless steels. Moreover, the formation and evolution of inclusions were calculated using FactSage, which can provide a theoretical explanation for the experimental results.
作者
陈为本
任英
徐海坤
王文博
张立峰
CHEN Wei-ben;REN Ying;XU Hai-kun;WANG Wen-bo;ZHANG Li-feng(School of Metallurgical and Ecological Engineering,University of Science and Technology Beijing,Beijing 100083,China;Refining Plate,Baosteel Desheng Stainless Steel Co.,Ltd.,Fuzhou 350601,Fujian,China)
出处
《钢铁》
CAS
CSCD
北大核心
2018年第10期38-45,60,共9页
Iron and Steel
基金
国家自然科学基金资助项目(51704018)
中央高校基本科研业务费专项资金资助项目(FRF-TP-17-039A1)
中国科协青年人才托举工程资助项目(2017QNRC001)
关键词
不锈钢
夹杂物
热处理
热力学
stainless steel
inclusion
heat treatment
thermodynamics
