【作者】 茆亮； 刘敏； 刘丽荣； 陈立佳； 徐维良； 孙志涛；

【Author】 Mao Liang 1 , Liu Li-rong 2 , Chen Li-jia 2 ,Xu Wei-liang (1.Northen Heavy Industries Co.,Ltd Heat treatment Company, Shenyang, 110141, China 2.Shenyang University of Technology, Shenyang , 110870, China)

【机构】 北方重工集团有限公司热处理分公司； 沈阳工业大学材料科学与工程学院； 北方重工集团有限公司矿山冶金设备分公司； 沈阳汇博热能设备有限公司；

【摘要】 研究了在抽拉速率为2mm/min的凝固条件下,不同含Ru量单晶高温合金的铸态组织、热处理态组织以及长期时效过程中的组织演化。结果表明,三种合金的铸态组织都为枝晶组织。含Ru为3%的合金中的枝晶间区域除了γ/γ’共晶以外,还出现了块状的NiAl基β相。完全热处理后获得了规则的立方形相,随着Ru含量的增加γ’相尺寸逐渐减小。在长期时效过程中,随含Ru量的增加相形筏趋势增加合金析出TCP相的时间推迟,即Ru有明显的抑制TCP相的作用。更多还原

【Abstract】 A single crystal superalloy with different contents of Ru addition was employed to study the influence of Ru addition on the the as-solidified microstructure, microstructural evolution during heat treatment and long term aging of single crystal superalloys.The result show that under the withdrawing rate of 2mm/min, three alloys with different content ruthenium were solidified with dendrite structure. In the as-solidified microstructure of 3Ru alloy, except for γ/γ’ eutectic microstructure, some NiAl based β phase with blocky morphology exist in the interdendritic region. After fully heat treatment, with the increase of ruthenium content, the size of γ’ phase deceases. During the long term aging, with the increasing of Ru content, the tendency to form raft enhanced. Ru can suppress the precipitation of TCP phases effectively.更多还原