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無鉛磷鈣黃銅的組織與性能
發(fā)布人：上海艾荔艾金屬材料有限公司www.bt990.com.cn
更新時間：2015-10-13
通過熔鑄方法，于中頻感應爐中制備無鉛磷鈣黃銅鑄錠，利用掃描電鏡、電子能譜儀、電子萬能試驗機及臥式車床等手段，研究磷鈣黃銅合金的顯微組織和力學、切削及耐脫鋅腐蝕性能，并結合切屑的形貌觀察，分析金屬間化合物對切削性能的改善作用。
無鉛磷鈣黃銅的組織與性能Microstructure and properties of lead-free P-Ca brasses
通過熔鑄方法，于中頻感應爐中制備無鉛磷鈣黃銅鑄錠，利用掃描電鏡、電子能譜儀、電子萬能試驗機及臥式車床等手段，研究磷鈣黃銅合金的顯微組織和力學、切削及耐脫鋅腐蝕性能，并結合切屑的形貌觀察，分析金屬間化合物對切削性能的改善作用。結果表明：磷、鈣顯著改變了黃銅的組織與性能，使得磷鈣黃銅的組織由α相、β相和分布在晶界上及晶粒內的金屬間化合物顆粒組成；無鉛磷鈣黃銅合金的主要成分(質量分數)為57%~60% Cu、40% Zn、0.7% P、0.5% Ca時，合金顯示出優(yōu)良的綜合性能，其抗拉強度為362.7 MPa，伸長率為15.0%，布氏硬度為105.0HB，耐脫鋅腐蝕深度為321.9 μm，切削性能與鉛黃銅HPb59?1相當。
The ingots of P-Ca brass were prepared in a medium frequency induction furnace through scientific casting process. The microstructure and mechanical, cutting and dezincification corrosion-resistance properties of P-Ca brass were studied by scanning electron microscopy (SEM), energy dispersive spectrometer(EDS), electron universal test machine and lathe, the effect of the intermetallics on the cutting performance was also studied through the observation of chips. The results show that, P and Ca change the microstructure and properties of brass alloys significantly, making the microstructure of P-Ca brass composed of α, β and intermetallic compounds dispersed on grain boundaries and in ??grains. The reasonable contents (mass fraction) of main elements are 57%?60% Cu, 40% Zn, 0.7% P and 0.5% Ca. The brass alloy containing this component has good performances as follows: tensile-strength of 362.7 MPa, elongation of 15.0%, Brinell hardness of 105.0HB, dezincification depth of 321.9 μm, and the cutting property is as well as that of HPb59?1.
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