Al元素对复杂镍硅黄铜微观组织演变的影响  

Effects of Al Addition on Microstructure Evolution of Complex Nickel-silicon Brass

作　　者：李士明 董壮壮[3,4] 接金川 董博闻[1] LI Shiming;DONG Zhuangzhuang;JIE Jinchuan;DONG Bowen(School of Mechanical and Electrical Engineering,Hubei Polytechnic University,Huangshi 435003;Hubei Key Laboratory of Intelligent Transportation Technology and Equipment,Hubei Polytechnic University,Huangshi 435003;China Heavy Duty Automobile Group Co.,Ltd.,Ji’nan 250013;School of Materials Science and Engineering,Dalian University of Technology,Dalian 116081)

机构地区：[1]湖北理工学院机电工程学院,黄石435003 [2]湖北理工学院智能输送技术与装备湖北省重点实验室,黄石435003 [3]中国重型汽车集团有限公司,济南250013 [4]大连理工大学材料科学与工程学院,大连116081

出　　处：《特种铸造及有色合金》2024年第9期1255-1259,共5页Special Casting & Nonferrous Alloys

基　　金：国家自然科学基金资助项目(52201038);湖北省教育厅科学技术研究计划指导性资助项目(B2016271)。

摘　　要：基于CALPHAD方法计算得到了Cu-Ni-Si、Cu-Zn-Al三元体系相图及伪二元相图,确定了具有硬质β基体+Ni_(2)Si增强相复合结构的镍硅黄铜合金成分。通过调控Cu-36Zn-7Ni-2Si-xA(l质量分数,%)合金中Al含量,发现当Al含量超过1%时,合金基体由(α+β)双相转变为β单相结构,分布于基体中的Ni_(2)Si增强相呈现连续珊瑚状(共晶Ni_(2)Si)和弥散颗粒状(初生Ni_(2)Si)。随Al含量升高,共晶Ni_(2)Si含量先小幅升高后大幅降低,当Al含量达到3%时,共晶Ni_(2)Si相含量接近于0。The ternary system phase diagrams of Cu-Ni-Si,Cu-Zn-Al as well as pseudo binary phase diagrams were obtained based on CALPHAD method to determine the composition of nickel-silicon brass with composite structure of hard βmatrix+Ni_(2)Si reinforcement phase.By adjusting Al content in Cu-36Zn-7Ni-2Si-xAl(mass fraction,%)alloy,it is found that when the Al content exceeds 1%,the alloy matrix(α+β)is transformed to singleβphase.Meanwhile,the Ni_(2)Si reinforcement phase distributed in the matrix exhibits continuous coral like(eutectic Ni_(2)Si)and dispersed granular(primary Ni_(2)Si)morphologies.With Al content increasing,the proportion of eutectic Ni_(2)Si is firstly increased slightly and then decreased significantly,which approaches 0 when Al content reaches 3%.

关 键 词：CALPHAD 镍硅黄铜 组织演变 Ni_(2)Si增强相 

分 类 号：TG146.11[一般工业技术—材料科学与工程]