The characteristics of the interfacial reaction between Ti-1100 melt and different primary coating materials was investigate.The effect of refractory materials and mould temperature on the reaction was analyzed by comparing the thickness,distribution of elements and microhardness of α-ease layer.The α-case layer thickness of Ti-1100 casting with ZrO2 primary coating is approximately 38 μm,which is higher than that with Y2O3 primary coating (18 μm).Ti-1100 casting using ZrO2 primary coating shows higher surface microhardness than that using Y2O3 primary coating.The higher mold temperature results in more severe interfacial reaction.With the same primary coating material and mould temperature,Ti6Al4V alloy presents better stability than Ti-1100 alloy.%研究不同面层材料的Ti-1100高温钛合金界面反应特性.通过对比反应层的厚度,元素分布以及微观硬度研究了面层型壳材料以及型壳预热温度对界面反应的影响.结果表明:采用ZrO2面层材料型壳浇注的Ti-1100铸件反应层的厚度和硬度明显高于采用Y2O3面层材料型壳浇注的合金；型壳预热温度越高,界面反应越剧烈;在相同的型壳面层材料和型壳预热温度条件下,Ti6Al4V合金铸件的界面反应α层比Ti-1100合金铸件界面反应层薄,显微硬度低,表现出较好的稳定性.
展开▼
