Ni基等离子堆焊合金的空蚀行为  

CAVITATION EROSION OF PTA WELD-SURFACED Ni-BASED ALLOY LAYERS

作　　者：国旭明[1] 郑玉贵[1] 姚治铭[1] 

机构地区：[1]中国科学院金属研究所腐蚀与防护国家重点实验室

出　　处：《材料研究学报》2002年第6期570-574,共5页Chinese Journal of Materials Research

基　　金：国家自然科学基金重点资助项目59831030;国家重点基础研究资助项目G19990650

摘　　要：使用超声振荡空蚀实验设备研究了Ni基等离子堆焊合金在蒸馏水中的空蚀行为.堆焊合金的 显微组织由奥氏体基体、第二相以及共晶组织组成,奥氏体基体的固溶强化以及大尺寸硬质相有效抵御微 射流的冲击,是Ni基等离子堆焊合金具有高的抗空蚀性能的主要原因.The resistance to cavitation erosion of plasma transferred arc (PTA) weld surfaced Ni-based alloy in distilled water was investigated by a ultrasonic vibratory apparatus. The result show that the cavitation erosion resistance of Ni-based surfacing alloy is 2 times that of 0Cr13Ni5Mo stainless steel. The microstructures of the surfacing alloy consist of austenite matrix, the second phases and the eutectic structures. The improvement in cavitation erosion resistance can be attributed to the solution strengthening of γ-NiCrFe matrix and the presence of large amounts of borides and carbides with large size which withstood the impingement of water microjet.

关 键 词：Ni基等离子堆焊合金 堆焊 空蚀 镍基合金 抗空蚀性能 

分 类 号：TG172.9[金属学及工艺—金属表面处理] TG14[金属学及工艺—金属学]