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0Cr17Ni4Cu4Nb中的铁素体相破坏了组织的均匀性,降低了材料塑韧性,在蠕变中加速了材料的老化速率,降低了材料的使用寿命。因此,控制铁素体相含量具有重要意义。化学成分和热加工温度是影响0Cr17Ni4Cu4Nb的主要因素。本文在确定合理化学成分的基础上,通过控制锻造温度,降低了热加工过程中铁素体相的形成,国内普遍认为铁素体相应控制在10%以内,采用上述措施可将铁素体相控制在5%以内。
The ferrite phase in 0Cr17Ni4Cu4Nb destroys the homogeneity of the microstructure, reduces the plasticity and toughness of the material, accelerates the aging rate of the material during creep and reduces the service life of the material. Therefore, the control of ferrite phase content is of great significance. Chemical composition and hot working temperature are the main factors affecting 0Cr17Ni4Cu4Nb. In this paper, on the basis of determining the reasonable chemical composition, by controlling the forging temperature, the formation of ferrite phase in hot working process is reduced. It is generally accepted that ferrite is controlled within 10% in China. The above measures can be used to control the ferrite phase Within 5%.