银铂合金的制备及性能研究

采用真空感应熔炼法制备得到了4种不同铂含量的银铂合金材料。测定了合金的密度并分析其物相，研究了铂含量对铸态银铂合金致密性、组织形貌、晶粒取向和硬度的影响。结果表明，在快速升温和冷却的熔铸条件下，所制备的银铂合金铸锭致密、有光泽；铂含量对银铂合金的组织形貌和性能有着显著的影响，随着铂含量的增大，银铂合金的组织由枝晶变为等轴晶，晶粒更小，且硬度逐渐增大。

Preparation and Properties of the Ag-Pt alloys

Four silver-platinum alloys with various platinum contents were prepared by vacuum induction melting method. Their density were determined, and their phases were analyzed . The impact of platinum content on compactness, micro-structure, grain orientation and hardness of as-cast silver-platinum alloys were investigated. The results indicated that the prepared silver-platinum alloy ingots were dense and shiny under the conditions of rapid heating and cooling. Platinum content had a significant effect on the micro-structure and properties of the silver-platinum alloys. With the increase of platinum content, the micro-structure of the silver-platinum alloy changed from dendritic crystals to isometric crystals with smaller grains, and the hardness was gradually increased.