摘要
为提高灰铸铁气缸体的综合性能,在实验室条件下以浇注单铸试棒和阶梯试样的方法,模拟试验了Cu含量对灰铸铁气缸体组织与性能的影响。结果表明：当Cu含量从0.20%增加到0.80%时,对模拟铸样的石墨形态及珠光体含量的影响不大,而对模拟铸样的力学性能影响较大,随着Cu含量在0.20%-0.50%范围内逐渐增加,试棒铸样的抗拉强度和硬度呈上升趋势,而当Cu含量在0.50%-0.80%范围内逐渐增加时,试棒铸样的抗拉强度和硬度却呈下降趋势;当Cu含量为0.50%时,对基体珠光体的细化和改善断面敏感性作用较强。
In order to improve the comprehensive performance of grey cast iron cylinder block, the effects of Cu content on microstructure and performance of grey cast iron cylinder block were simulated by the method of pouring single casting test bar and ladder block under laboratory conditions. The results show that, when the Cu content increases from 0.20% to 0.80%, which has the smaller effects on graphite morphology and pearlite content of simulation casting samples, but has greater influence on the mechanical properties. With the gradual increase of Cu content in the range of 0.20%-0.50%, the tensile strength and hardness of the casting test bars is on the rising. But when Cu content in the range of 0.50%-0.80% increases gradually, the tensile strength and hardness of the casting test bars is on a declining curve. The Cu content of 0.50% has a stronger effect on the refinement of pearlite matrix and the improvement of cross section sensitivity.
出处
《铸造技术》
CAS
北大核心
2014年第10期2346-2348,共3页
Foundry Technology
关键词
CU含量
灰铸铁
模拟铸样
显微组织
力学性能
Cu content
gray cast iron
simulation casting sample
microstructure
mechanical property
