高温下硅锰相的演变及其对硅锰黄铜耐磨性能的影响  

Evolution of silicon-manganese phase at high temperature and its effect on wear resistance of brasses containing silicon and manganese

作　　者：田武 戴姣燕[2] 鲍明东[2] 张丽俊 常勇强 王世民 于盛旺[1] Tian Wu;Dai Jiaoyan;Bao Mingdong;Zhang Lijun;Chang Yongqiang;Wang Shimin;Yu Shengwang(College of Materials Science and Engineering,Taiyuan University of Technology,Taiyuan Shanxi 030024,China;School of Materials and Chemical Engineering,Ningbo University of Technology,Ningbo Zhejiang 315211,China;School of Materials Science and Engineering,Chang'an University,Xi'an Shaanxi 710061,China;Ningbo Zycalloy Co.,Ltd.,Ningbo Zhejiang 315206,China)

机构地区：[1]太原理工大学材料科学与工程学院,山西太原030024 [2]宁波工程学院材化学院,浙江宁波315211 [3]长安大学材料科学与工程学院,陕西西安710061 [4]宁波正元铜合金有限公司,浙江宁波315206

出　　处：《金属热处理》2020年第3期15-19,共5页Heat Treatment of Metals

基　　金：浙江省教育厅科研计划(Y201431973);宁波市重点工业攻关项目(2017B10039)。

摘　　要：通过设计温度为500℃、800℃,保温时间为1 h、6 h的4种不同热处理工艺,对锰硅比为2的铸态硅锰黄铜进行热处理试验。通过扫描电镜、白光干涉、光学显微镜、硬度计分别对试验试样的显微组织、磨痕形貌和力学性能进行了分析和表征。结果表明,经过4种热处理后,硅锰黄铜的耐磨性均得到了提升,其中热处理温度为800℃、保温时间6 h的性能优于其他3种热处理工艺。在500℃温度下,硅锰黄铜中细小硅锰相会发生溶解,在800℃下更多的硅锰相固溶入基体组织中。脱溶形成的细长且尖锐的硅锰相使硅锰黄铜的摩擦磨损性能和硬度得到提升。Four heat treatment processes on a Si-Mn brass with the Mn/Si ratio of 2 were carried out at 500℃and 800℃respectively for 1 h and 6 h.Then the microstructure,wear scar morphology and mechanical properties of the tested brass samples were analyzed and characterized by scanning electron microscope,white light interference,optical microscope and hardness tester.The results show that the wear resistance of the brass is improved after four kinds of heat treatment,and is the best when the heat treatment temperature is 800℃and the holding time is 6 h.The fine Si-Mn phase in the brass is dissolved at 500℃,and more Si-Mn phase is dissolved into the matrix at 800℃.The friction and wear properties and hardness of the Si-Mn brass are improved by the precipitated slender and sharp Si-Mn phase.

关 键 词：硅锰黄铜 硅锰相 热处理 摩擦磨损性能 

分 类 号：TG156.1[金属学及工艺—热处理]