摘要
在生产过程中，对于不同壁厚的铸件，改变CE和Si／C值，试验了它们对灰铸铁性能和组织的影响。结果表明：当CE一定，Si／C值由0．6～1．0之间变化时，所对应的强度和硬度是条相似的凸形抛物线，当Si／C值达到0．8左右时强度硬度出现峰值，当Si／C〉0．9时强度硬度随Si／C值增加而急速下降。Si／C值一定，改变CE，强度硬度随Si／C值增加而下降。当CE〉3．9％、Si／C〉1．0或CE〉4．0％、Si／C〉0．9时铸件产生疏松倾向加剧，并伴有较多的铁素体产生，即使对壁厚小于10mm的薄壁件也产生铁素体。当Si／C〉0．95时，铁液呈糊状凝固，流动性下降。
During the production, the influence of the changing of CE and Si/C on gray cast iron＇s performance and microstructure, of which wall thickness was different, was teste. The results indicate that., when CE was fixed and the value of Si/C changed from 0.6 to 1.0, the curves of strength and hardness to Si/C were similar convex parabola; when the value of Si/C reached about 0.8, the peak value of strength and hardness appeared; when the value bigger than 0.9, the strength and hardness decreased swiftly as the Si/C value increased; when Si/C value was fixed and CE changed, the strength and hardness decreased as the Si/C value increased; when CE〉3.9%, Si/C〉1.0 or CE〉4.0%, Si/C〉0.9, the tendency of occurring porosity in castings intensified, meanwhile many ferrite were produced, even in the thin walled parts less than 10 mm; when Si/C〉0.95, the molten iron present pulpiness.
出处
《铸造》
CAS
CSCD
北大核心
2009年第8期823-826,共4页
Foundry
