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以ZCuSn10铜合金为研究对象,采用冷轧-重熔的应变诱导熔化激活法(SIMA)制备了流变浆料,研究了流变成形比压和挤压速率对半固态ZCuSn10铜合金挤压组织的影响,探讨了ZCuSn10铜合金充型流动过程中固、液两相的演变规律。结果表明,在成形比压为150 MPa,挤压速率为14mm/s时得到的成形件组织较均匀,固、液两相协同流动性好。相同挤压工艺条件下,半固态挤压成形件各个位置组织差异较大。近冲头位置保持初始半固态组织;试样中部位置为固、液两相共存的半固态组织,固相颗粒圆整度较高;试样最前端的微观组织中以液相为主,固、液两相分布均匀性较差。
ZCuSn10 copper alloy was taken as the research object. The rheological slurry was prepared by cold-rolling-remelting strain induced melt activation (SIMA) method. The effects of rheological forming pressure and extrusion rate on the semi-solid ZCuSn10 copper alloy extrusion Organization, the evolution of solid and liquid phases in ZCuSn10 copper alloy filled flow was discussed. The results show that the shape of the formed part is uniform at a specific pressure of 150 MPa and an extrusion rate of 14 mm / s, and the synergistic fluidity between solid and liquid phases is good. The same extrusion process conditions, the semi-solid extruded parts of each location differences are larger. Near the punch position to maintain the initial semi-solid tissue; sample central position for the solid and liquid co-existence of semi-solid phase, solid particles higher roundness; the most microscopic sample of the liquid phase-based , Liquid two-phase distribution is poor.