Transactions of Nonferrous Metals Society of China The Chinese Journal of Nonferrous Metals

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中国有色金属学报

ZHONGGUO YOUSEJINSHU XUEBAO

第26卷    第4期    总第205期    2016年4月

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文章编号:1004-0609(2016)-04-0766-07
时效温度对镍铝青铜合金的硬质相演变的影响
李振亚,杨丽景,许 赪,冒守栋,宋振纶

(中国科学院 宁波材料技术与工程研究所 中国科学院海洋新材料与应用技术重点实验室
浙江省海洋材料与防护技术重点实验室,宁波 315201
)

摘 要: 采用自行熔炼牌号为ZQAl10-4-4的镍铝青铜合金(Cu-10%Al-4.7%Ni-3.5%Fe-0.8%Mn),采用SEM、XRD、EDS、DSC、内耗测试、硬度测试、摩擦性能测试等分析手段,研究时效温度对合金中硬质相的演变规律以及合金力学性能的影响。结果表明:在450 ℃以上时效时,合金的硬质马氏体转变为较软的α相基体,并随着时效温度的升高而导致弥散分布的K相聚集长大,使合金的硬度降低、摩擦磨损量增加。合金在420~450 ℃这一时效温度区间,具有最佳显微硬度(约420 HV)和较好的耐磨性能。

 

关键字: 镍铝青铜;时效;力学性能;耐磨性能

Effect of aging temperature on hard phase evolution of nickel aluminum bronze
LI Zhen-ya, YANG Li-jing, XU Cheng, MAO Shou-dong, SONG Zhen-lun

Key Laboratory of Marine Materials and Related Technologies, Zhejiang Key Laboratory of Marine Materials and Protective Technologies, Ningbo Institute of Materials Technology and Engineering,
Chinese Academy of Sciences, Ningbo 315201, China

Abstract:ZQAl10-4-4 nickel aluminum bronze (Cu-10%Al-4.7%Ni-3.5%Fe-0.8%Mn) was prepared. The effect of aging temperature on the hard phase evolution and mechanical properties of the alloy was investigated by SEM, XRD, EDS, DSC, internal friction, microhardness and wear tests. The results show that the alloy exhibits a phase transformation of hard martensite into soft α phase when aging above 450 ℃, and shows significant aggregation and growth of evenly-distributed K phases with the increasing of aging temperature. In the meantime, the alloy exhibits a decreasing microhardness and increasing wear with increasing the aging temperature. A maximum microhardness value of about 420 HV and good wear resistance are achieved when the alloy is aged at temperatures of 420-450 ℃.

 

Key words: nickel aluminum bronze; aging; mechanical property; wear resistance

ISSN 1004-0609
CN 43-1238/TG
CODEN: ZYJXFK

ISSN 1003-6326
CN 43-1239/TG
CODEN: TNMCEW

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