Mechanical Properties of Copper Sulfide-Dispersed Lead-Free Bronze
Mechanical Properties of Copper Sulfide-Dispersed Lead-Free Bronze
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DOI：
10.2320/matertrans.d-mra2008841
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发表时间：
2009-04
影响因子：
1.2
通讯作者：
H. Sueyoshi;Y. Yamano;Kensuke Inoue;Y. Maeda;Kosaku Yamada
中科院分区：
文献类型：
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作者：
H. Sueyoshi;Y. Yamano;Kensuke Inoue;Y. Maeda;Kosaku Yamada
研究了在铜锡混合青铜中加入MoS 2制备的硫化铜分散青铜的显微组织、拉伸性能和维氏硬度。随着MoS的添加量的增加，cu2s的数量和铸造缺陷的数量也增加。cu2s分散青铜的维氏硬度随mo - 2添加量的增加而增加。这是因为Mo引起的固溶硬化和cu2s分散引起的硬化优于铸造缺陷引起的软化。随着mo - 2添加量的增加，cu2s分散青铜的抗拉强度降低。这是因为铸造缺陷造成的软化作用大于Mo引起的固溶硬化作用和Cu 2 s分散引起的强化作用。Cu 2 s分散青铜的断裂伸长率随Mo 2添加量的增加而降低。这是因为铸造缺陷的数量增加，cu2s作为空洞的核心。为了生产出与含Pb的CAC406和含Bi的CAC902相当的具有优良切削性能和力学性能的无铅青铜，控制好硫酸铜的数量和尺寸以及铸造缺陷的数量是非常重要的。
Microstructure, tensile properties and Vickers hardness of the copper sulfide (Cu2S)-dispersed bronze produced by adding MoS 2 to molten bronze consisting of Cu and Sn were examined. The amount of Cu 2 S and the number of casting defects increase with the amount of added MoS 2 . The Vickers hardness of Cu 2 S-dispersed bronze increases with the amount of added MoS 2 . This is because the solid-solution hardening owing to Mo and the hardening due to the dispersion of Cu 2 S are superior to the softening due to casting defects. The tensile strength of Cu 2 S-dispersed bronze decreases with increasing amount of added MoS 2 . This is because the softening due to casting defects outweights the solid-solution hardening due to Mo and the strengthening due to the dispersion of Cu 2 S. The fracture elongation of Cu 2 S-dispersed bronze decreases with the amount of added MoS 2 . This is because the number of casting defects increases and Cu 2 S acts as a nucleus of voids. To produce Pb-free bronze having excellent machinability and mechanical properties equivalent to those of CAC406 containing Pb and CAC902 containing Bi, adequate control of the amount and size of Cu 2 S and the number of casting defects is of great importance.