DZ125合金返回料夹杂物分析  

Analysis of Inclusions in DZ125 Superalloy Revert

作　　者：解方良 骆合力[1] 李尚平[1] 王建涛[1] 

机构地区：[1]钢铁研究总院高温材料研究所,北京100081

出　　处：《铸造技术》2017年第9期2196-2200,共5页Foundry Technology

摘　　要：利用SEM、能谱仪等系统分析了DZ125合金返回料夹杂物的种类、分布。结果表明,在返回料表面夹杂物主要有HfO_2、Al_2O_3、SiO_2等氧化物和参杂在异常长大的MC上的碳氮硫混合夹杂物;在返回料内部夹杂物主要有Mg-Al-Si-Hf混合氧化夹杂和纯净的HfO_2夹杂等。结合合金的生产工艺和元素氧化自由能曲线,解释了返回料内外夹杂物的生成机制:表面夹杂物是合金与辅助材料SiO_2发生氧化反应产生,内部夹杂物主要有辅助材料掉落、氧化内生和原料遗留三种产生方式。The inclusions types and distribution in DZ125 superalloy revert were analyzed by SEM, EDS. The results show that the inclusions in the revert surface are mainly mixed oxides, such as HfO_2,Al_2O_3,SiO_2, etc, and the carbon, nitrogen and sulphur mixed inclusions grew up with the abnormal growth of MC. The internal inclusions of the reverts are mainly Mg-Al-Si-Hf mixed oxides and purity HfO_2, etc. Combining with the alloy melting process and the Gibbs flee energy of the different kinds of inclusions, the forming mechanism of the revert surface and internal inclusion was explained. The surface inclusions is generated by the oxide reaction of the alloy and the auxiliary materials--SiO_2. The internal inclusion is mainly generated by three ways of auxiliary material drop, oxidation endogenous and raw material left.

关 键 词：高温合金返回料 DZ125合金 夹杂物 生成机制 

分 类 号：TG132.3[一般工业技术—材料科学与工程]