化学法制备氧化物弥散强化钢中强化相(Y2O3)形成机理

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

  • 摘要: 开发了一种新型的制备氧化物弥散强化(ODS)铁素体钢的方法,用该方法研制的12Cr-ODS钢具有优异的室温和高温拉伸强度、较低的韧脆转化温度、良好的抗蠕变性能和抗辐照肿胀性能.分析了预合金粉末中氧化物(Y2O3)经焙烧热分解、热等静压的界面反应和热变形析出过程和演化行为,并提出选用合理的工艺技术有利于氧化物强化相均匀化.

     

    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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