Ni含量对Cr_(13)Ni_5Si_2/γ合金高温耐磨性能的影响  

Effect of Ni Content on High-Temperature Sliding Wear Properties of Cr_(13)Ni_5Si_2/γ Alloy

作　　者：方艳丽[1] 王华明[1] 

机构地区：[1]北京航空航天大学激光材料加工与制造技术实验室,北京100083

出　　处：《稀有金属材料与工程》2007年第4期690-694,共5页Rare Metal Materials and Engineering

基　　金：国家自然科学基金(50331010);航空基础科学基金(05H51009)

摘　　要：研究了Ni含量对镍基固溶体(γ)增韧Cr13Ni5Si2三元金属硅化物合金组织及高温耐磨性的影响。结果表明,Cr13Ni5Si2/γ合金硬度及Cr13Ni5Si2初生树枝晶体积分数均随Ni含量的增加而降低。由于Cr13Ni5Si2的高硬度与Ni基固溶体γ高强韧性配合,Cr13Ni5Si2/γ合金在600℃高温滑动磨损条件下,表现出优异的耐磨性能并随合金中Ni含量增加而迅速增加。合金高温滑动磨损过程主要受Cr13Ni5Si2初生树枝晶的破碎与脱落过程控制。The effects of Ni content on the microstructure and high-temperature wear resistance of Ni-base solid solution （γ） toughened Cr13Ni5Si2 alloy were investigated. It is found that the average hardness of Cr13Ni5Si2/7 alloy, the volume fraction of Cr13Ni5Si2primary dendrite and the individual hardness of Cr13Ni5Si2 ternary metal silicide, all decreased with increasing the Ni content. The Cr13Ni5Si2/7 alloys have excellent wear resistance under the test conditions of high-temperature sliding wear due to the high hardness of Cr13Ni5Si2 and the good combination of toughness and strength of γ The wear resistance of Cr13Ni5Si2/γ alloy at 600℃ increased considerably with increasing the Ni content. The wear of Cr13Ni5Si2/γ alloy was governed by the slow process of micro-spalling or the pull-out of cracked Cr13Ni5Si2 primary dendrites.

关 键 词：高温磨损 三元金属硅化物 Cr13Ni5Si2 

分 类 号：TG115.58[金属学及工艺—物理冶金]