稀土Ce固溶量对ZG32MnMoNiCu组织和性能的影响
Effect of Rare Element Ce Solid Solubility on Microstructure and Properties of ZG32MnMoNiCu
贾冬生 1李建国 1赵银虎 1张鹏 1洪振军 2刘玉宝 3李志杰 2崔健伟 2陈杉 1兰岳光3
作者信息
- 1. 内蒙古第一机械集团股份有限公司,内蒙古包头 014030;特种车辆设计制造集成技术全国重点实验室,内蒙古包头 014030
- 2. 内蒙古第一机械集团股份有限公司,内蒙古包头 014030
- 3. 包头稀土研究院,内蒙古包头 014020
- 折叠
摘要
通过向不同O、S含量的ZG32MnMoNiCu加入相同含量的稀土合金,研究稀土Ce对调质态ZG32MnMoNiCu组织和性能的影响.通过拉伸、冲击和硬度试验测试铸钢力学性能,同时采用扫描电镜对微观组织和断口形貌进行观察.结果表明:钢液中高的O、S含量与稀土Ce结合导致铸钢中稀土Ce固溶量降低,形成了稀土夹杂物,且当铸钢中稀土Ce固溶量达 0.18%形成的稀土夹杂物发生了偏聚,呈聚集的和连续的链条状;铸钢中高的Ce固溶量提高了马氏体向回火索氏体转变的温度,在相同热处理状态下微观组织除了形成颗粒状的回火索氏体,局部还存在回火马氏体组织,导致铸钢的强度提高,塑性和冲击性能降低.
Abstract
The effect of rare element Ce on the microstructure and properties of ZG32MnMoNiCu was studied by adding the same content of rare element alloy to ZG32MnMoNiCu with different O and S contents.The mechanical properties of cast steel were tested by tensile,impact and hardness tests,and the microstructure and fracture morphology were observed by scanning electron microscopy.The results show that the high content of O and S combined with rare element Ce in the molten steel leads to the decrease of the solid solution of rare element Ce in the cast steel and the formation of rare element inclusions.When the solid solution of rare element Ce in the cast steel reaches 0.18%,the rare element inclusions formed by the cast steel have a segregation,showing aggregation and continuous chain.The high Ce solution content in cast steel increases the temperature of transformation from martensite to tempered sortensite.In the same heat treatment state,the microstructure not only forms granular tempered sortensite,but also partially exists tempered martensite structure,resulting in the strength of cast steel increased,plasticity and impact toughness decreased.
关键词
铸钢/稀土元素/微观组织/力学性能Key words
cast steel/rare element/microstructure/mechanical property引用本文复制引用
基金项目
内蒙古自治区科技计划项目(2022YFSJ0035)
出版年
2024
NETL
NSTL
万方数据