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本文采用光学显微镜定量金相法和电子探针等研究方法对热等静压及热等静压+锻造的FGH95粉末高温合金中的陶瓷夹杂进行了定性和定量的分析,并对FGH95合金与Rene′95合金中的陶瓷夹杂作了对比。 研究得出:FGH95合金中的陶瓷夹杂主要是Al_2O_3以及Al_2O_3与SiO_2的复合氧化物;而Rene′95合金中,则是SiO_2与MgO的复合氧化物以及硅酸铝与MgO的复合氧化物。热等静压的FGH95合金中陶瓷夹杂远远多于Rene′95合金,约高2倍。此外,FGH95合金中的陶瓷夹杂颗粒比Rene95合金要粗大。 研究表明:采用热等静压+热锻工艺的FGH95合金,其陶瓷夹杂的平均尺寸比热等静压工艺的FGH95合金要小。合金粉末粒度对合金中的陶瓷夹杂有明显影响。
In this paper, qualitative and quantitative analysis of ceramic inclusions in hot isostatic pressing and hot isostatic pressing + forged FGH95 powder superalloys were carried out by means of optical microscopy quantitative metallographic method and electron probe method, and FGH95 alloy and Rene ’95 The ceramic inclusions in the alloy are compared. The results show that the ceramic inclusions in FGH95 alloy are mainly composed of Al 2 O 3 and composite oxides of Al 2 O 3 and SiO 2, while those of Rene ’95 alloy are composite oxides of SiO 2 and MgO and composite oxides of aluminum silicate and MgO. Hot isostatic pressing FGH95 alloy ceramic inclusions far more than Rene’95 alloy, about 2 times higher. In addition, ceramic inclusions in FGH95 alloy are coarser than Rene95 alloy. The results show that the average size of ceramic inclusions in FGH95 alloy by hot isostatic pressing and hot forging is smaller than that of FGH95 alloy by hot isostatic pressing. Alloy powder particle size of the ceramic inclusions in the alloy have a significant impact.