柱塞泵用C67300锰黄铜油的润滑摩擦磨损性能  

Friction and wear properties of C67300 manganese brass under oil lubrication for application in piston pumps

作　　者：苟佩佩 王娜[2] 徐瑞 董志刚 王清[1] 康仁科[3] 董闯[1] GOU Pei-pei;WANG Na;XU Rui;DONG Zhi-gang;WANG Qing;KANG Ren-ke;DONG Chuang(School of Material Science and Engineering,Dalian University of Technology,Dalian 116024,China;The Aviation Industry Corporation of China,Xi’an Flight Automatic Control Institute,Xi’an 710065,China;School of Mechanical Engineering,Dalian University of Technology,Dalian 116024,China)

机构地区：[1]大连理工大学材料科学与工程学院,大连116024 [2]中航工业西安飞行自动控制研究所,西安710065 [3]大连理工大学机械工程学院,大连116024

出　　处：《中国有色金属学报》2020年第12期2920-2929,共10页The Chinese Journal of Nonferrous Metals

基　　金：国防基础科研计划资助项目(41423020209)。

摘　　要：研究退火态和冷轧态C67300锰黄铜合金在油润滑状态以及不同加载载荷和转速条件下,与对磨副GCr15钢的摩擦磨损性能,并借助一系列表征测试技术研究C67300锰黄铜的微观组织、力学性能(尤其硬弹比H/E)与摩擦性能的关联。结果表明:C67300锰黄铜主要由α-Cu(FCC结构)固溶体基体、β′-CuZn(B2结构)、和硬质颗粒ω-Mn5Si3(D88结构)构成。冷轧态C67300锰黄铜的硬度(184 HV)和屈服强度(410 MPa)略高于其退火态的(137 HV,345 MPa),从而导致合金的硬弹比(H/E)从0.014增大至0.020。在恒定载荷300 N、不同转速400~700 r/min条件下,冷轧态和退火态C67300锰黄铜的摩擦因数都随转速增加而降低,即摩擦因数f从0.06~0.07减小至0.02;而在恒定转速400 r/min、不同施加载荷200~500 N条件下,冷轧态和退火态合金摩擦因数都随施加载荷增加而增加,如冷轧态时摩擦因数从0.03增大至0.07。在不同试验条件下,冷轧态C67300锰黄铜的摩擦因数均低于退火态的,且变化幅度较小,表现出更佳的耐磨性,这主要是由于冷轧态C67300锰黄铜的H/E更接近于对磨副GCr15钢的H/E=0.035,从而有望通过提高合金的硬弹比,以实现与对磨副合金匹配来改善材料的耐磨性。The present work investigated primarily the friction and wear properties of annealed and cold-rolled C67300 manganese brass against the GCr15 steel(friction pair)under the conditions of different loads and speeds,as well as the oil lubrication.The microstructures,mechanical properties,and friction properties of annealed and cold-rolled C67300 manganese brass were characterized by a series of testing techniques.Experimental results show that the C67300 manganese brass is constituted ofα-Cu solid solution matrix with a face-centered-cubic(FCC)structure,plusβ′-CuZn with a B2 structure andω-Mn5Si3 with a D88 structure.The microhardness(184 HV)and yield strength(410 MPa)of cold-rolled C67300 manganese brass are slightly higher than those of annealed alloy(137 HV and 345 MPa),which results in a ratio of microhardness to Young’s modulus of the cold-rolled alloy(H/E=0.02)much higher than that of the annealed(H/E=0.014).The friction coefficients of both annealed and cold-rolled C67300 manganese brass decrease,with the increase of speed from 400 r/min to 700 r/min when fixing the applied load of 300 N,from f=0.06−0.07 to f=0.02.By contrast,the friction coefficients of both annealed and cold-rolled C67300 manganese brass increase with the applied load from 200 N to 500 N when fixing the speed of 400 r/min,as exampled by the fact that the friction coefficient of cold-rolled alloy increases f=0.03 to f=0.07.It is found that a relatively lower friction coefficient always appears in the cold-rolled alloy under any applied conditions,indicating that the cold-rolled C67300 manganese brass possesses a better wear resistance than the annealed.It is mainly ascribed to the fact that the H/E value(H/E=0.02)of cold-rolled C67300 manganese brass is much close to that of the friction pair of GCr15 steel(H/E=0.035),which is expected to improve the wear resistance of alloys by matching the H/E values of friction pairs well.

关 键 词：锰黄铜合金 预变形 摩擦 磨损 

分 类 号：TG146.1[一般工业技术—材料科学与工程]