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化學法制備氧化物彌散強化鋼中強化相(Y2O3)形成機理

Mechanism of forming strengthening phase (Y2O3) in oxide dispersion strengthened steels produced by a chemical method

  • 摘要: 開發了一種新型的制備氧化物彌散強化(ODS)鐵素體鋼的方法,用該方法研制的12Cr-ODS鋼具有優異的室溫和高溫拉伸強度、較低的韌脆轉化溫度、良好的抗蠕變性能和抗輻照腫脹性能.分析了預合金粉末中氧化物(Y2O3)經焙燒熱分解、熱等靜壓的界面反應和熱變形析出過程和演化行為,并提出選用合理的工藝技術有利于氧化物強化相均勻化.

     

    Abstract: A new production route for producing a new class of oxides dispersion strengthened (ODS) steels was investigated. The steel produced by the chemical socking method has high temperature strength, low ductile-to-brittle transition temperature, good creep properties and void swelling resistance. The formation process and behavior of oxides (Y2O3) in the prealloyed powders were analyzed in the process of thermal decomposition, interracial reactions of hot isostatic pressing, and precipitation of deformation processing. A uniform distribution of oxide particles could be obtained by selecting reasonable parameters.

     

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