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.
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
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)
