滲碳體石墨化制備無鉛易切削石墨黃銅(英文)
本文選題:無鉛石墨黃銅 + 石墨化退火; 參考:《Transactions of Nonferrous Metals Society of China》2015年10期
【摘要】:通過向黃銅中添加共晶鑄鐵,在熔鑄過程中原位生成滲碳體顆粒,利用石墨化退火工藝使?jié)B碳體分解成石墨從而制得石墨黃銅。利用SEM和EDS分析石墨黃銅的顯微組織,探討顯微組織與切削性能的關(guān)系。結(jié)果表明:鑄態(tài)黃銅中的滲碳體顆粒經(jīng)過退火后全部分解為石墨顆粒,石墨顆粒均勻彌散地分布在黃銅基體上,其平均尺寸為5.0μm,體積分?jǐn)?shù)約為1.1%。石墨黃銅的車削表面光滑無毛刺,切屑形貌為短C型,比鉛黃銅的粗大,但優(yōu)于普通黃銅的長螺旋型屑。
[Abstract]:By adding eutectic cast iron to brass, cementite particles were formed in situ during melting and casting. Graphite brass was prepared by decomposing cementite into graphite by graphitization annealing process. The microstructure of graphite brass was analyzed by SEM and EDS, and the relationship between microstructure and cutting property was discussed. The results show that the cementite particles in the as-cast brass are decomposed into graphite particles after annealing, and the graphite particles distribute uniformly on the brass matrix. The average size of the cementite particles is 5.0 渭 m and the volume fraction is about 1.1 渭 m. The turning surface of graphite brass is smooth without burr, and the shape of chip is short C-type, which is thicker than lead brass, but superior to the long spiral chip of common brass.
【作者單位】: 南昌大學(xué)材料科學(xué)與工程學(xué)院;
【基金】:Projects(51271090,51364036,51471083)supported by the National Natural Science Foundation of China Project(IRT0730)supported by the Program for Changjiang Scholars and Innovative Research Team in University,China Project(NCET-10-0184)supported by the Program for New Century Excellent Talents in University,China Project(20103601110001)supported by the Specialized Research Fund for the Doctoral Program of Higher Education of China
【分類號】:TG291
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