V对DZ417G合金组织性能的影响  

Effect of V Element on the Microstructure and Mechanical Properties of DZ417G Superalloy

作　　者：黄爱华[1] 于兴福[2] 王宇飞[1] 满延林 王铁军[1] 崔树森[1] 

机构地区：[1]沈阳黎明航空发动机(集团)有限责任公司,辽宁沈阳110043 [2]沈阳工业大学材料科学与工程学院,辽宁沈阳110870

出　　处：《铸造》2013年第5期448-450,455,共4页Foundry

摘　　要：为掌握合金化元素V对DZ417G合金力学性能及微观组织的影响,熔炼出具有不同V元素含量的合金,并进行了力学性能测试和微观组织形貌观察。结果表明,随着V含量增加,DZ417G合金的高温断裂强度和塑性均有所提高。测定结果表明,760℃、725 MPa条件下,随V元素含量的提高合金的持久寿命增大,由90 h提高至245 h。对DZ417G合金微观组织观察表明,随合金中V含量的提高,合金中共晶相数量增加,合金中的碳化物析出数量增加,分散程度增大,合金中的碳化物组织变得更加细小。经热处理后,合金中枝晶干处γ′相为细小立方体型γ′相。In order to grasp the effect of alloying element V on the mechanical properties and microstructure of DZ417G alloy, DZ417G alloy with different V element contents in the alloy were smelted, the mechanical properties were tested and microstructure was observed. The results show that with the increasing of element V content, the high temperature tensile strength and the plastic both increase. The tested creep life shows that, with element V content increasing, the creep life of alloy increases from 90 h with 0.62% V to 245 h with 0.96%V at 760 ℃ and 725 MPa. The microstructure observation ofDZ417G shows that with the increasing of V content in the alloy, eutectic phase volume increases, and carbide precipitation increases in number, dispersion increases. Carbides in the tissue become finer. After heat treatment the γ＇ phase is finer cubic phase in the alloy.

关 键 词：DZ417G合金 V元素 力学性能 蠕变寿命 微观组织 

分 类 号：TG136.1[一般工业技术—材料科学与工程]