【摘要】：以氧含量分別為60×10~(-6),145×10~(-6)和216×10~(-6)的GH4169預(yù)合金粉末為原料,采用粉末熱等靜壓法制備成塊體合金,然后進(jìn)行熱處理,研究粉末氧含量對(duì)FGH4169合金的室溫和高溫力學(xué)性能及組織的影響。結(jié)果表明,隨原始粉末氧含量從60×10~(-6)增加到216×10~(-6),Al和Ti元素在粉末表面富集,并生成斑點(diǎn)狀氧化物;粉末氧含量對(duì)FGH4169合金的致密度無明顯影響,但可改變合金中碳化物的分布和形態(tài)。高氧含量的FGH4169合金中易形成原始顆粒邊界(prior particle boundary,PPB),PPB中含有碳化物和氧化物。FGH4169合金在室溫和高溫下的塑性均隨氧含量增加而降低,粉末氧含量為60×10~(-6)和145×10~(-6)時(shí),FGH4169合金在室溫和650℃下的強(qiáng)度和塑性都能達(dá)到變形GH4169合金的標(biāo)準(zhǔn)值。
[Abstract]:Bulk GH4169 prealloyed powders with oxygen content of 60 脳 10 ~ (-6) and 216 脳 10 ~ (-6) were prepared by hot isostatic pressing method. The effects of oxygen content on mechanical properties and microstructure of FGH4169 alloys at room and high temperatures were studied. The results showed that with the increase of oxygen content from 60 脳 10 ~ (-6) to 216 脳 10 ~ (-6) Al and Ti elements in the powder surface, the oxygen content of the powder enriched on the surface of the powder and formed a dotted oxide, and the oxygen content of the powder had no obvious effect on the density of the FGH4169 alloy, but it could change the distribution and morphology of the carbide in the alloy. It is easy to form the original particle boundary (prior particle boundary,PPB in FGH4169 alloy with high oxygen content. The plasticity of the alloy containing carbide and oxide. FGH4169 decreases with the increase of oxygen content at room temperature and at high temperature. The strength and plasticity of FGH4169 alloy at room temperature and 650 鈩，

本文編號(hào)：2251780