摘要
为获得高韧性球铁,采用中频感应电炉熔炼,获得高温、低硫、低氧化的铁液;合理设计铁液化学成分;选用低稀土FeSiMg8RE3球化剂;采用盖包法球化处理工艺,用含Ba的多元微量复合孕育剂进行孕育处理。结果表明,25 mm厚Y试块的抗拉强度达到456.3~500.6 MPa,伸长率达到18.4%~19.2%。
In order to obtain high toughness ductile iron, the following measures were adopted：adopting medium frequency induction furnace smelting iron liquid to obtain the iron liquid with high temperature, low sulphur and low oxidation; designing rational chemical composition of iron liquid; choosing low rare-earth nodulizer; using tundish-cover method of nodulizing process technology, and using multiple microscale compound inoculants containing Ba. The results show that the tensile strength of 25 mm Y-block reach 456.3-500.6 MPa, the elongation reach 18.4% -19.2%.
出处
《铸造技术》
CAS
北大核心
2014年第9期2091-2092,共2页
Foundry Technology
关键词
铸态球铁
盖包法
化学成分
低稀土球化剂
as-cast ductile iron
tundish-covered method
chemical compositiom
low-RE nodulizer
