镍铝青铜BAl7-7-2-2合金摩擦磨损性能分析  

Analysis on Friction and Wear Performance of Nickel Aluminum Bronze Alloy BAl7-7-2-2

作　　者：李志强[1] 宋德军[1] 郁炎[1] LI Zhiqiang SONG Dejun YU Yan(Luoyang Ship Material Research Institute, Luoyang 471023, China)

机构地区：[1]中国船舶重工集团公司第七二五研究所,河南洛阳471023

出　　处：《材料开发与应用》2017年第3期54-58,共5页Development and Application of Materials

摘　　要：分析了镍铝青铜BAl7-7-2-2合金及其热处理后的金相组织、硬度、拉伸性能、冲击韧性和摩擦磨损性能。结果表明,镍铝青铜BAl7-7-2-2合金经热处理后,组织发生再结晶细化,κ相析出减少,强度、硬度降低,冲击性能显著提高;BAl7-7-2-2合金摩擦系数低于QAl9-4合金的,热处理后摩擦系数继续减小,减摩性能优异;BAl7-7-2-2合金的磨损率高于QAl9-4合金的,热处理后磨损率降低,磨痕宽度和深度减小,耐磨性得到提高,接近QAl9-4合金的水平。The microstructure,hardness,tensile properties,impact toughness and friction-wear performances of nickel aluminum bronze alloy（BAl7-7-2-2） before and after heat treatment were analyzed. The microstructure of BA17-7-2-2 heat treated recrystalized and refined,and the precipitates of κ phase decreased,resulting in reduced hardness and strength and increased impact toughness. The friction coefficient of BAl7-7-2-2 alloy was lower than that of QAl9-4,and the friction coefficient of BAl7-7-2-2alloy after heat treatment was lower than that of the original one,demonstrating an excellent performance of antifriction. The wear rate of BAl7-7-2-2 alloy was higher than that of QAl9-4 alloy,while the wear rate of BAl7-7-2-2 alloy after heat treatment was reduced,the width and depth of grinding crack became narrower and shallower than those of BAl7-7-2-2,and its wear resistance was improved to the level of that of QAl9-4 alloy.

关 键 词：镍铝青铜 力学性能 摩擦磨损性能 

分 类 号：TG446.1[金属学及工艺—焊接]