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对镍基超合金Hastelloy X进行渗铝处理,并对渗铝层的高温循环氧化性能和微观组织进行分析。结果表明:经950℃×9 h固体渗铝处理后,在镍基超合金Hastelloy X表面生成厚度约75μm的Ni-Al合金层,并有细小的析出相产生,同时在合金层与基材之间有厚约5.5μm的中间扩散层生成。渗铝处理后的Hastelloy X试片具有较佳的抗高温氧化能力。中间扩散层在多次高温循环氧化之后开始产生横向裂痕,对铝化Hastelloy X的抗高温氧化能力不利。
The Hastelloy X alloy was aluminized, and the high temperature cyclic oxidation properties and microstructure of the aluminized layer were analyzed. The results show that Ni-Al alloy layer with a thickness of about 75μm is formed on the surface of Hastelloy X alloy after 950 ℃ × 9 h solid aluminizing, and fine precipitates are formed. At the same time, There is an intermediate diffusion layer with a thickness of about 5.5μm. The aluminized Hastelloy X test strip has better high temperature oxidation resistance. The middle diffusion layer begins to produce transverse cracks after repeated high temperature cyclic oxidation, which is unfavorable to the high temperature oxidation resistance of aluminized Hastelloy X.