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研究了含少量Fe或Sn的锆合金显微组织,结果表明Zr-Fe二元合金中的Fe元素(≤1.0%,质量分数),除极少量固溶外,基本上是以Zr_3Fe第二相的形式析出,而且随着Fe含量的增加,第二相种类不变,尺寸变大。Zr-Sn二元合金中添加的Sn(≤5.0%)是以完全固溶的状态存在于锆基体中,不会参与形成第二相粒子;添加Sn元素会阻碍Zr合金回复及再结晶进程。在Zr-Sn-Fe合金中,Sn元素的添加可以提高Fe在α-Zr中的固溶含量,并且通过阻碍Zr合金β相快冷时板条晶晶粒长大及Fe元素的迁移,影响Zr_3Fe第二相的尺度及分布,可以使其细化并分布更均匀。
The microstructure of zirconium alloy with a small amount of Fe or Sn was studied. The results show that the content of Fe (≤1.0%, mass fraction) in Zr-Fe binary alloy, The precipitation of the form, and with the increase of Fe content, the second phase species unchanged, the size becomes larger. The addition of Sn (≤5.0%) to the Zr-Sn binary alloy exists in a completely solid solution in the zirconium matrix and does not participate in the formation of second-phase particles. Addition of Sn element hinders the recovery and recrystallization of the Zr alloy. In the Zr-Sn-Fe alloy, the addition of Sn can increase the content of Fe in α-Zr and influence the grain growth and the migration of Fe during rapid cooling of β phase of Zr alloy The scale and distribution of Zr_3Fe second phase can refine and distribute more uniformly.