渗碳体石墨化制备无铅易切削石墨黄铜的组织及性能*

薛滢妤, 唐建成, 卓海鸥, 叶楠, 吴桐, 周旭升

MICROSTRUCTURES AND PROPERTIES OF LEAD-FREE FREE-CUTTING GRAPHITE-BRASS PREPARED BY GRAPHITIZATION OF CEMENTITE

XUE Yingyu, TANG Jiancheng, ZHUO Haiou, YE Nan, WU Tong, ZHOU Xusheng

表1 不同铸铁添加量的退火态石墨黄铜和铅黄铜HPb59-1的力学性能

Table 1 Mechanical properties of annealed graphite-brass added with different contents of ECIs and HPb59-1

ECI / % sb / MPa s0.2 / MPa d / % Hardness / HV 1 432.36 212.07 27.5 134.5 3 468.66 238.60 22.7 140.7 5 502.00 249.00 19.2 148.9 7 543.31 276.38 16.8 168.3 HPb59-1[27] ≥440 ≥10