论文部分内容阅读
按照合金元素在真空自耗电弧熔炼过程中的行为特征、受到的影响因素和控制方法的不同,将Zr-4合金中的24种元素分为工艺控制元素、工艺保证元素和由海绵锆决定的元素三类。主合金元素Sn,Fe,Cr,以Zr-Sn-Cr-Fe中间合金的形式,在压制电极块时加入到海绵锆中,氧以金属氧化物的形式加入,并建立了在加入金属氧化物的Zr-4合金的配料公式。通过对250炉Zr-4合金铸锭分析试验表明,铸锭化学成分是均匀的,它们的标准偏差为:σ_(Sn)=0.072％,σ_(Cr)=0.0064％,σ_(Fe)=0.014％,σ_(o_2)=0.017％。对φ<220mm纵剖试验表明,Sn,Fe,Cr,O_2,在铸锭内部具有良好的均匀性。
The 24 elements in Zr-4 alloy are divided into process control elements, process assurance elements and sponge zirconium according to the behavior characteristics of the alloy elements in vacuum consumable arc melting process, the factors affected and the control methods. Three types of elements. The main alloying elements Sn, Fe, Cr are added to the sponge zirconium in the form of a Zr-Sn-Cr-Fe master alloy at the time of pressing the electrode block, oxygen is added as a metal oxide, and a metal oxide Zr-4 alloy formula. Through the analysis of 250 ingots of Zr-4 alloy ingot, the ingot chemical composition is uniform and their standard deviations are: σ_ (Sn) = 0.072%, σ_ (Cr) = 0.0064% and σ_ (Fe) = 0.014 %, Σ_ (o_2) = 0.017%. Longitudinal tests on φ <220mm show that Sn, Fe, Cr and O_2 have good homogeneity in the ingot.