CAJ | 학술논문

采用锻造与重熔加热的应变诱导熔化激活(SIMA)法制备CuSn10P1合金半固态坯料，先对CuSn10P1铸锭进行退火处理，再对其进行锻造变形，然后对试样进行850及950℃保温5 min-水淬处理，获得CuSn10P1半固态坯料。采用金相显微镜和扫描电镜观察各阶段试样组织形貌，计算半固态组织的固相分数，分析变形量和重熔温度对CuSn10P1半固态组织的影响。结果表明：CuSn10P1合金铸锭经680℃、24 h退火后，消除了枝晶组织，获得了以α相为主的等轴晶组织。CuSn10P1合金半固态组织固相分数随变形量的增加而降低，当变形量从8.4%增加至21.9%经850℃重熔时，固相分数从70.15%降低至57.83%；950℃重熔时，固相分数从58.79%降低至53.10%。重熔温度越高，变形量对固相分数变化程度影响越小。
채용단조여중용가열적응변유도용화격활(SIMA)법제비CuSn10P1합금반고태배료，선대CuSn10P1주정진행퇴화처리，재대기진행단조변형，연후대시양진행850급950℃보온5 min-수쉬처리，획득CuSn10P1반고태배료。채용금상현미경화소묘전경관찰각계단시양조직형모，계산반고태조직적고상분수，분석변형량화중용온도대CuSn10P1반고태조직적영향。결과표명：CuSn10P1합금주정경680℃、24 h퇴화후，소제료지정조직，획득료이α상위주적등축정조직。CuSn10P1합금반고태조직고상분수수변형량적증가이강저，당변형량종8.4%증가지21.9%경850℃중용시，고상분수종70.15%강저지57.83%；950℃중용시，고상분수종58.79%강저지53.10%。중용온도월고，변형량대고상분수변화정도영향월소。
Semi-solid CuSn10P1 alloy billets were fabricated by strain induced melt activation (SIMA) method including the forging and remelting processes. Firstly, CuSn10P1 billets were annealed and forged. Secondly, the billets were reheated to 850℃or 950℃, and hold for 5 min. Finally, the billets were water quenched, and semi-solid microstructures of CuSn10P1 alloy were obtained. The microstructures of semi-solid CuSn10P1 alloy with different stages were observed by OM and SEM. The solid fractions of the semi-solid microstructure were computed. The effects of deformation and remelting temperature on the microstructures of semi-solid CuSn10P1 alloy were investigated. The results indicate that dendritic structure of CuSn10P1 billets is eliminated, and equiaxed grains ofαphase are obtained after annealing at 680℃ for 24 h. The solid fraction of semi-solid CuSn10P1 microstructure decreases with the increase of the deformation. With the increase of the deformation from 8.4% to 21.9%, the solid fraction decreases from 70.15% to 57.83% by remelting at 850 ℃, and the solid fraction decreases from 58.79% to 53.10% by remelting at 950℃. The higher the remelting temperature is, the smaller the effect of deformation on solid fraction is.