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硅铁和稀土复合孕育对高碳灰铁组织与性能的影响
Effects of Ferrosilicon and Rare Earth Compound Inoculation on the Microstructure and Properties of High Carbon Gray Iron
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- DOI:
- 作者:
- 许荣福 李常厚 孙向成 时月亚 姜文韬
XU Rongfu;LI Changhou;SUN Xiangcheng;SHI Yueya;JIANG Wentao
- 作者单位:
- XU Rongfu;LI Changhou;SUN Xiangcheng;SHI Yueya;JIANG Wentao
School of Materials Science and Engineering,Shandong Jianzhu University,Ji'nan 250101,China;Yantai Nanshan University,Longkou 265706,China
- 关键词:
- 高碳灰铸铁 复合孕育 稀土 力学性能
high CE gray iron complex inoculation rare earth mechanical property
- 摘要:
- 以高碳灰铸铁为研究对象,研究硅铁和稀土的复合孕育对其组织与力学性能的影响。实验结果表明:在硅铁加入量不变的情况下,随着稀土加入量的增加,片状石墨形貌发生变化甚至出现球化现象;当稀土加入量为1.2%时,石墨开始蠕化,基体中开始出现莱氏体和珠光体;当稀土加入量为1.4%时,石墨开始球化,基体中珠光体含量减少、莱氏体数量增多;当稀土加入量达到2.0%时,球化率继续升高,基体中大量出现莱氏体;随着稀土加入量的增加,所得的高碳灰铸铁的力学性能呈增加的趋势,当稀土加入量超过1.0%时,其力学性能增加明显,抗拉强度超过450 MPa
The effect of the compound inoculation of ferrosilicon and rare earth on the microstructure and mechanical properties of high carbon gray cast iron was studied.The results show that the morphology of flake graphite changed and even spheroidized with the increase of the amount of rare earth when the amount of ferrosilicon is unchanged.When the rare earth content is 1.2%,the graphite began to vermicularize,and leustenite and pearlite began to appear in the matrix.When the amount of rare earth is 1.4%,the graphite began to spheroidize,the pearlite content in the matrix decreased,and the amount of lestenitic increased.When the amount of rare earth is up to 2.0%,the spheroidization rate continued to increase,and a large number of leitenitic bodies appeared in the matrix.With the increase of rare earth content,the mechanical properties of high carbon gray cast iron show an overall increasing trend.When the rare earth content exceeds 1.0%,the mechanical properties of high carbon gray cast iron increase significantly,and the tensile strength exceeds 450 MPa.