真空感应熔炼工艺对镍基高温合金氧氮含量的影响  

Effect of Vacuum Induction Melting Process on Oxygen and Nitrogen Concentrations in Nickel-Based Superalloy

作　　者：马秀萍 周同金 刘东方 万旭杰 孟宇 张华霞 MA Xiu-ping;ZHOU Tong-jin;LIU Dong-fang;WAN Xu-jie;MENG Yu;ZHANG Hua-xia(Beijing Institute of Aeronautical Materials, Beijing 100095, China)

机构地区：[1]北京航空材料研究院

出　　处：《铸造》2019年第7期730-733,共4页Foundry

摘　　要：研究了真空感应熔炼过程中不同熔化时间和精炼工艺对合金中氧和氮含量的影响。结果表明:镍基高温合金中氧和氮含量随着合金中铬含量增加呈增加趋势;熔化30min时,合金中氧和氮含量分别降低36%和14%。随着精炼时间的延长,氮含量呈下降趋势,氧含量在精炼前30min呈降低趋势,精炼40min时氧含量反而增加。精炼过程中增加电磁搅拌后,提高了脱除氧氮速率,同时也提高了坩埚增氧速率。当精炼30min时氧和氮脱除量比无电磁搅拌精炼工艺分别提高17%和22%;精炼时间达到40min时,氮含量持续降低25%,而氧含量比无电磁搅拌精炼工艺增加12%。The effects of different melting times and refining processes on the concentrations of oxygen and nitrogen in nickel-based superalloy were studied. The results show that the concentrations of oxygen and nitrogen in the superalloy increased with the content of chromium. When the melting time was prolonged to 30 min, the concentrations of oxygen and nitrogen in the alloy were decreased by 36% and 14%, respectively. With the extension of refining time, the concentrations of nitrogen and oxygen showed a downward trend in 30 min;however, the oxygen concentration increased after 40 min. After adding electromagnetic stirring in the refining process, the deoxidation and denitrogenation rates were increased, and the rate of oxygen increasing in crucible also increased. When the refining time was up to 30 min, the amount of oxygen and nitrogen removal was 17% and 22% higher than those of the non-electromagnetic stirring refining process, respectively. When the refining time was up to 40 min, the nitrogen concentration continued to decrease by 25%, while the oxygen concentration increased by 12% compared with the non-electromagnetic stirring refining process.

关 键 词：真空感应熔炼 熔化时间 精炼工艺 

分 类 号：TG243[金属学及工艺—铸造]