CAJ | 학술논문

采用Gleeble?1500热模拟实验机在温度为600~800°C、应变速率为0.01~10 s?1的热变形条件下对新型无镍白色Cu?12Mn?15Zn?1.5Al?0.3Ti?0.14B?0.1Ce(质量分数，%)合金进行热压缩模拟实验；根据该合金热变形行为及热加工特征，建立该合金热变形的本构方程和热加工图。该合金热变形过程中变形激活能为203.005 kJ/mol。当真应变为0.7时，合金热加工图中存在一个失稳区，此区域的变形温度为600~700°C，应变速率为0.32~10 s?1。在较适宜的热变形条件(800°C、10 s?1)下获得的合金具有良好的表面质量和内部组织。同时，该无镍合金具有与传统镍白铜Cu?15Ni?24Zn?1.5Pb合金相近似的白色色度和肉眼不易察觉的色差(小于1.5)。
채용Gleeble?1500열모의실험궤재온도위600~800°C、응변속솔위0.01~10 s?1적열변형조건하대신형무얼백색Cu?12Mn?15Zn?1.5Al?0.3Ti?0.14B?0.1Ce(질량분수，%)합금진행열압축모의실험；근거해합금열변형행위급열가공특정，건립해합금열변형적본구방정화열가공도。해합금열변형과정중변형격활능위203.005 kJ/mol。당진응변위0.7시，합금열가공도중존재일개실은구，차구역적변형온도위600~700°C，응변속솔위0.32~10 s?1。재교괄의적열변형조건(800°C、10 s?1)하획득적합금구유량호적표면질량화내부조직。동시，해무얼합금구유여전통얼백동Cu?15Ni?24Zn?1.5Pb합금상근사적백색색도화육안불역찰각적색차(소우1.5)。
Hot compression test of a novel nickel-free white alloy Cu?12Mn?15Zn?1.5Al?0.3Ti?0.14B?0.1Ce (mass fraction, %) was conducted on a Gleeble?1500 machine in the temperature range of 600?800 °C and the strain rate range of 0.01?10 s?1. The constitutive equation and hot processing map of the alloy were built up according to its hot deformation behavior and hot working characteristics. The deformation activation energy of the alloy is 203.005 kJ/mol. An instability region appears in the hot deformation temperature of 600?700 °C and the strain rate range of 0.32?10 s?1 when the true strain of the alloy is up to 0.7. Under the optimal hot deformation condition of 800 °C and 10 s?1 the prepared specimen has good surface quality and interior structure. The designed nickel-free alloy has very similar white chromaticity with the traditional white copper alloy (Cu?15Ni?24Zn?1.5Pb), and the color difference between them is less than 1.5, which can hardly be distinguished by human eyes.