摘要
为研究氮含量对混合基体球墨铸铁铸件力学性能和金相组织的影响,采用树脂砂造型制得不同壁厚的混合基体球墨铸铁试样,检测试样的氮含量、抗拉强度、伸长率、硬度、石墨大小、石墨数量和球化等级。结果表明:氮含量在80 ppm以下时,随着氮含量的增加,石墨尺寸更小,石墨数量更多,球化率更高;氮含量在90~100 ppm时,石墨尺寸增大,石墨数量减少,球化率降低。
To investigate the effect of nitrogen content on the mechanical properties and microstructure of mixed-matrix ductile iron castings,specimens with different wall thicknesses were prepared using resin sand molds.The nitrogen content,tensile strength,elongation,hardness,graphite size,graphite count,and nodularity grade were measured.The results show that:when the nitrogen content is below 80 ppm,increasing nitrogen content leads to smaller graphite size,higher graphite count,and improved nodularity;when the nitrogen content is between 90~100 ppm,the graphite size increases,graphite count decreases,and nodularity declines.
作者
严纯建
刘晓亮
刘恒锐
YAN Chunjian;LIU Xiaoliang;LIU Hengrui(Fuxin Lida Iron&Steel Casting Co.,Ltd.,Fuxin 123102,Liaoning China)
出处
《铸造工程》
2025年第6期39-45,共7页
Foundry Engineering
关键词
氮化锰
球墨铸铁
阶梯试块
力学性能
金相组织
manganese nitride
ductile iron
step block
mechanical properties
metallographic structure
