Cu对蠕墨铸铁热疲劳性能的影响  

Effect of Cu on the Thermal Fatigue Property of Vermicular Cast Iron

作　　者：周李明 李忠芳 刘铎 安钰坤 赵而团[1] 杨思一[1] ZHOU LIMing;LI Zhongfang;LIU Duo;AN Yukun;ZHAO Ertuan;YANG Siyi(School of Mechanical Engineering,Shandong University of Tectmology,Zibo 255049,China)

机构地区：[1]山东理工大学机械工程学院,山东淄博255049

出　　处：《铸造技术》2018年第8期1651-1655,共5页Foundry Technology

基　　金：山东省自然科学基金资助项目(ZR2018MEM006);山东省重点研发计划资助项目(2017GGX30113)

摘　　要：采用自制热疲劳试验机,研究了Cu对蠕铁制动材料的基体组织及热疲劳性能的影响规律。结果表明,Cu元素的添加提高了基体中珠光体的含量,缩小了珠光体的片层间距;含0.4%Cu的蠕铁珠光体含量达到了60%,珠光体片层间距为0.3μm,缩小了25%;含0.6%Cu的蠕铁珠光体含量为80%,珠光体片层间距为0.2μm,缩小了50%。在室温~600℃的循环条件下,含0.6%Cu的蠕铁的热疲劳裂纹最短,与不含Cu的蠕铁相比裂纹缩短了42%,表明Cu元素的添加能够有效改善蠕铁的抗热疲劳性能。The influence of Cu on the matrix structure coupled with the thermal fatigue resistance of the vermicular cast iron was investigated using a self-made thermal fatigue testing machine. The results show that Cu can modify the pearlite proportion and reduce the interlayer spacing. Vermicular cast iron with the Cu of 0.4% and 0.6% present the pearlite proportion of 60% and 80%, as well, the interlayer spacing is reduced into 0.3 ）~m and 0.2 ）~m with the reduced proportion of 25% and 50%, respectively. Under the condition of the cycle of room temperature to 600 ~, 0.6% Cu content of the thermal fatigue crack of vermicular cast iron is the shortest, and contains no Cu vermicular iron crack shortened by 42%, it shows that the addition of Cu element can effectively improve the thermal fatigue resistance of vermicular cast iron.

关 键 词：热疲劳 珠光体层片间距 蠕墨铸铁 制动系统 

分 类 号：TG251[金属学及工艺—铸造]