放电等离子烧结工艺制备Ni60B镍基自熔合金  

Preparation of Ni60B Ni Based Self-fluxing Alloy by Spark Plasma Sintering

作　　者：丁小芹 韩小云[1] 王贤瑞[1] 游航[1] 梁翠[1] 徐金富[1,2] 

机构地区：[1]华东理工大学材料科学与工程学院,上海200237 [2]宁波工程学院材料工艺研究所,宁波315016

出　　处：《机械工程材料》2011年第2期71-73,88,共4页Materials For Mechanical Engineering

摘　　要：采用放电等离子烧结技术制备了KF-Ni60B镍基自熔合金,通过硬度、密度测试,研究了烧结温度、保温时间和烧结压力对烧结体性能的影响,并对烧结工艺进行了优化。结果表明:烧结温度对该合金性能的影响最大,烧结压力和时间的影响次之;在65 MPa压力下,经870℃烧结15 min的Ni60B自熔合金性能最佳,硬度为64.22 HRC,密度为7.713 g.cm-3;烧结后的合金组织为在-γNi固溶体基体上均匀分布着铬、铁的碳化物、硼化物等硬质相,晶粒均匀细小。KF-Ni60B Ni based then self-fluxing alloy（SFA） was prepared by spark plasma sintering（SPS） process.The effects of sintering temperature,holding time and sintering pressure on properties of the sintering body were studied by the measurements of hardness and density and then the sintering process was optimized.The results indicate that the greatest influence factor on properties was sintering temperature,and followed by sintering pressure and time.Under pressure of 65 MPa,the Ni60B SFA sintered at 870 ℃ for 15 min had the best properties with hardness of 64.22 HRC and density of 7.713 g·cm-3.Microstructure of the sintered alloy was γ-Ni solid-solution matrix with fine grain size,which was uniform distributed with hard phases of carbides with Cr,Fe and boride.

关 键 词：Ni60B镍基合金 自熔合金 放电等离子烧结 

分 类 号：TG146.1[一般工业技术—材料科学与工程] TG156.99[金属学及工艺—金属材料]