(昆明理工大學(xué) 材料科學(xué)與工程學(xué)院，昆明 650093)
摘 要: 利用Gleeble-1500熱/力學(xué)模擬試驗機，對采用應(yīng)變誘導(dǎo)熔化激活法制備的ZCuSn10銅合金半固態(tài)及鑄態(tài)坯料進行單向壓縮實驗。分析壓縮變形條件對半固態(tài)ZCuSn10銅合金坯料顯微組織的影響，并結(jié)合壓縮后的顯微組織對固液兩相的流動規(guī)律進行分析。結(jié)果表明：SIMA法制備的半固態(tài)壓縮試樣變形抗力僅為常規(guī)鑄態(tài)ZCuSn10銅合金壓縮試樣的一半。半固態(tài)試樣壓縮變形前液相率為19.4%，壓縮變形后液相率為8.1%。半固態(tài)ZCuSn10銅合金在不同應(yīng)變量、變形溫度、應(yīng)變速率下進行壓縮實驗，試樣在過渡區(qū)域開始產(chǎn)生液固分離現(xiàn)象，并在中心區(qū)域出現(xiàn)液固完全分離現(xiàn)象。變形量越大，半固態(tài)ZCuSn10銅合金壓縮試樣中心部位的液相越少。隨著溫度的升高，半固態(tài)ZCuSn10銅合金壓縮試樣的端部、過渡區(qū)域、心部的液相均增加。隨著應(yīng)變速率的增加，半固態(tài)ZCuSn10銅合金壓縮試樣的過渡區(qū)域的液相增加。
關(guān)鍵字: 銅合金；半固態(tài)；單向壓縮；組織演變
（Faculty of Materials Science and Engineering, Kunming University of Science and Technology, Kunming 650093, China）
Abstract:The compression deformation experiments of semi-solid ZCuSn10 copper alloy billet prepared by SIMA (strain induced melt activation) process were carried out by using Gleeble-1500 thermo-mechanical simulator test. The experimental results show that the deformation resistance of the semisolid simples prepared by SIMA method is half of as-cast ZCuSn10 copper alloy. The liquid phase rate of semi-solid sample before and after compression is 19.4% and 8.1%, respectively. Compression test under different strain, strain rate and temperature, the liquid-solid separation phenomenon occurs in transition region of the semi-solid ZCuSn10 copper alloy sample. And liquid-solid separation occurs entirely in the central region. The greater the strain is, the less liquid content of the semi-solid copper alloy compression ZCuSn10 central part of the samples. The liquid content increases with increasing temperature, and increases with increasing strain rate.
Key words: copper alloy; semi-solid; uniaxial compression; microstructure evolution
