渗碳体石墨化制备无铅易切削石墨黄铜（英文）

发布时间：2018-04-29 17:15

本文选题：无铅石墨黄铜 + 石墨化退火　；参考：《Transactions of Nonferrous Metals Society of China》2015年10期

【摘要】：通过向黄铜中添加共晶铸铁,在熔铸过程中原位生成渗碳体颗粒,利用石墨化退火工艺使渗碳体分解成石墨从而制得石墨黄铜。利用SEM和EDS分析石墨黄铜的显微组织,探讨显微组织与切削性能的关系。结果表明:铸态黄铜中的渗碳体颗粒经过退火后全部分解为石墨颗粒,石墨颗粒均匀弥散地分布在黄铜基体上,其平均尺寸为5.0μm,体积分数约为1.1%。石墨黄铜的车削表面光滑无毛刺,切屑形貌为短C型,比铅黄铜的粗大,但优于普通黄铜的长螺旋型屑。
[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.
【作者单位】：南昌大学材料科学与工程学院;
【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
【分类号】：TG291

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