易切削铜合金及易切削铜合金的制造方法

    公开(公告)号:CN114761592B

    公开(公告)日:2023-06-30

    申请号:CN202080084404.7

    申请日:2020-11-30

    Abstract: 该易切削铜合金含有Cu:超过59.7%且小于64.7%、Si:超过0.60%且小于1.30%、Pb:超过0.001%且小于0.20%、Bi:超过0.001%且小于0.10%、及P:超过0.001%且小于0.15%,剩余部分由Zn及不可避免的杂质构成,Fe、Mn、Co及Cr的总量小于0.45%,Sn和Al的总量小于0.45%,56.7≤Cu‑4.7×Si+0.5×Pb+0.5×Bi‑0.5×P≤59.7,0.003≤Pb+Bi<0.25,在0.003≤Pb+Bi<0.08的情况下,0.02≤Bi/(Pb+Bi)≤0.98,在0.08≤Pb+Bi<0.13的情况下,0.01≤Bi/(Pb+Bi)≤0.40或0.85≤Bi/(Pb+Bi)≤0.98,在0.13≤Pb+Bi<0.25的情况下,0.01≤f3=Bi/(Pb+Bi)≤0.33,金相组织由α相和β相构成,17≤β≤75,7.0≤(Bi+Pb‑0.001)1/2×10+(P‑0.001)1/2×5+(β‑8)1/2×(Si‑0.2)1/2×1.3≤16.0。

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