【摘要】：利用水冷銅坩堝懸浮熔煉制備K4169合金,采用掃描電子顯微鏡(SEM)、X射線衍射(XRD)等,研究了水冷銅坩堝懸浮熔煉對K4169合金的組織和室溫力學(xué)性能的影響。研究結(jié)果表明:熔煉工藝對K4169合金析出相無明顯影響;水冷銅坩堝懸浮熔煉相比真空感應(yīng)熔煉K4169合金存在更明顯的枝晶組織和塊狀、鏈狀的Laves相;室溫下拉伸性能比真空感應(yīng)熔煉K4169合金高56%;水冷銅坩堝懸浮熔煉K4169試樣斷口中二次枝晶臂排列緊密,三次枝晶臂相互交聯(lián),而真空感應(yīng)熔煉試樣枝晶臂更加短小;水冷銅坩堝懸浮熔煉比真空感應(yīng)熔煉K4169合金室溫下抗壓強(qiáng)度高25%,但塑性較低。
[Abstract]:K4169 alloy was prepared by water cooled copper crucible suspension melting. The effect of water cooled copper crucible suspension melting on the microstructure and mechanical properties of K4169 alloy at room temperature was studied by scanning electron microscope (SEM) (SEM), X ray diffraction (XRD). The results show that the melting process has no obvious effect on the precipitating phase of K4169 alloy, and that there are more dendritic structure and block, chain-like Laves phase in water cooled copper crucible suspension melting than in vacuum induction melting. The tensile properties of K4169 alloy are higher than that of K4169 alloy in vacuum induction melting at room temperature, the secondary dendrite arms are arranged closely in the fracture surface of water-cooled copper crucible suspension melting K4169 sample, and the third dendritic arms are cross-linked with each other, while the dendritic arms of vacuum induction melting samples are shorter. Water cooled copper crucible suspension melting is 25% higher than that of vacuum induction melting K4169 alloy at room temperature, but the plasticity is low.
【作者單位】： 蘭州理工大學(xué)省部共建有色金屬先進(jìn)加工與再利用國家重點(diǎn)實(shí)驗(yàn)室;
【基金】：國家重點(diǎn)基礎(chǔ)研究發(fā)展計(jì)劃(編號:2012CB722800)
【分類號】：TF19;TF133;TG146.15

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