新型Ir-Al-W基高温合金的铸态组织和元素分布研究  

Study on As-cast Microstructure and Element Distribution of New Ir-Al-W Based Superalloy

作　　者：李扬 刘毅[1] 陈登权[1] 罗锡明[1] 张健康[1] 许昆[1] LI Yang, LIU Yi, CHEN Dengquan, LUO Ximing, ZHANG Jiankang, XU Kun(Kunming Institute of Precious Metals, State Key Laboratory of Advance Technologies for Comprehensive Utilization of Platinum Metals, Sino-platinum Metals Co., Ltd., Kunming 650106, Chin)

机构地区：[1]贵研铂业股份有限公司稀贵金属综合利用新技术国家重点实验室昆明贵金属研究所

出　　处：《热加工工艺》2018年第5期99-101,共3页Hot Working Technology

基　　金：国家自然科学基金(51501075);国家自然科学基金云南省联合基金(U1202273);云南省科技创新人才计划项目(2015HC034);云南省应用基础研究重大项目资助(2016FC006)

摘　　要：通过光学显微镜（OM）和扫描电镜（SEM）对新型Ir-10Al-10W（at%）高温合金的铸态显微组织和元素分布进行了分析,并对合金的显微硬度进行了测试。结果表明,合金铸态组织为枝晶,Al元素在晶界处偏析,W元素主要分布在晶内,同时Ir-10Al-10W合金的显微硬度明显高于纯铱的显微硬度。The as-cast microstructure and element distribution of new Ir- 10Al- 10W （at%） superalloy were analyzed by using optical microscope （OM） and scanning electron microscope （SEM）, and the microhardness of the superalloy was tested. The result shows that the as-cast microstructure of the alloy is dendrite, Al element segregates at grain boundaries, W element is mainly distributed in the crystal,and the microhardness of the Ir- 10Al-10W superalloy is obviously higher than that of pure It.

关 键 词：Ir-10Al-10W合金 铸态组织 偏析 显微硬度 

分 类 号：TG146.3[一般工业技术—材料科学与工程]