真空连铸+离心铸造工艺对L605合金纯净度的影响  

Effects of Vacuum Continuous Casting+Centrifugal Casting Process on Purity of L605 Alloy

作　　者：寻梦华 骆合力[1,2] 李尚平 韩少丽 张继 Xun Menghua;Luo Heli;Li Shangping;Han Shaoli;Zhang Ji(Research Institute of High Temperature Materials,Central Iron&.Steel Research Institute;Gaona Aero Material Co.,Ltd.)

机构地区：[1]钢铁研究总院高温材料研究所,北京100081 [2]北京钢研高纳科技股份有限公司

出　　处：《特种铸造及有色合金》2023年第4期499-502,共4页Special Casting & Nonferrous Alloys

基　　金：国家重点研发计划资助项目(2020YFC1107201)。

摘　　要：采用真空连铸+离心铸造工艺制备了φ50 mm的L605离心铸管,分析了L605管坯中的气体、有害元素的含量和非金属夹杂物。结果表明,真空连铸/离心铸造工艺是提高铸管纯净度的有效方法,试制L605合金中O含量为0.000 4%,N含量为0.006%,S含量为0.000 9%,P含量<0.001%。L605管坯非金属夹杂物含量低于0.2 mg/kg, 95%以上的夹杂物尺寸小于2.5μm,纯净度很高,满足了L605细径薄壁管的加工要求。Vacuum continuous casting+centrifugal casting process was conducted to prepare 50 mm L605 centrifugal casting pipe,and the gas,content of harmful elements and non-metallic inclusions in L605 casting pipe were analyzed.The results indicate that vacuum continuous casting+centrifugal casting process is an effective method to improve the purity of casting pipe.The oxygen content,nitrogen content,sulfur content and phosphorus content of L605 alloy are 0.0004%,0.006%,0.0009%and 0.001%,respectively.The content of non-metallic inclusions in L605 tube blank is less than 0.2 mg/kg,and over 95%of inclusions are smaller than 2.5μm,reaching an extremely high purity level.The trial alloy possesses desirable processing performance,meeting the processing requirements for fine and thin-walled L605 pipe.

关 键 词：L605合金 纯净度 连铸 离心铸造 

分 类 号：TG249.4[金属学及工艺—铸造] TG146.16[一般工业技术—材料科学与工程]