摘要
研究了室温油分级等温淬火时,硅和锰对贝氏体球墨铸铁磨球组织和性能的影响。试验结果表明:硅含量在3.3%-3.8%时,对贝氏体相变具有诱发作用,使贝氏体球铁组织细化,力学性能提高,锰使贝氏体球墨铸铁的硬度提高韧性降低,合理的硅锰量可提高贝氏体球墨铸铁的力学性能。
In this work, the effects of Si and Mn on the microstructure and mechanical properties of the bainite ductile iron by step austempering in the room-temperature machine oil have been studied. The experiment results show that induced phase transformation in the bainite ductile iron can be brought out by Si in 3.3%-3.8%, and the structure with good mechanical properties has been obtained; Mn can increase the hardness and reduce the impact toughness of the bainite ductile iron. Reasonable Si and Mn content can improve mechanical properties of the bainite ductile cast iron.
出处
《铸造》
CAS
CSCD
北大核心
2008年第9期960-962,966,共4页
Foundry
关键词
分级等温淬火
贝氏体
球墨铸铁
诱发相变
step austempering
bainite
ductile iron
induced phase transformation
