摘要
以某型氧泵壳体精密铸造生产工艺条件为基础,研究了硅溶胶-锆英砂面层体系陶瓷型壳与Fe-Cr-Ni-Co-Mo马氏体不锈钢(S-04、S-130)的界面反应。采用激光粒度仪、SEM等手段表征分析了陶瓷型壳原料粉体的形貌和粒度分布,采用冷冻透射电镜表征了硅溶胶的微观结构,并采用SEM、EDS等手段分析了两种不锈钢铸件的界面反应。结果表明,S-04、S-130发生界面反应的原因主要为合金中Cr与型壳面层SiO2发生反应;S-04不锈钢中Cr反应活度高于S-130不锈钢,而Fe则相反,这导致两种不锈钢的界面反应层厚度在微观上存在差异。
Based on the production process conditions of investment casting of a certain type of oxygen pump shell,the interfacial reaction between ceramic shell of silica sol-zircon surface layer system and Fe-Cr-Ni-Co-Mo martensitic stainless steel(S-04,S-130)were investigated.The morphology and particle size distribution of ceramic shell raw material powders were analyzed by means of laser particle size analyzer,SEM and other measures.The microstructure of silica sol was characterized by cryo-transmission electron microscopy,and interfacial reaction of stainless steel castings was analyzed by SEM,EDS and other means.The results indicate that the main reason for the interfacial reaction of S-04 and S-130 is that Cr element reacts with SiOz on the surface layer of the mold shell.The reactivity of Cr element in S04 stainless steel is higher than that of S130 stainless steel,while Fe element is the opposite,resulting in a microscopic difference in the thickness of the interfacial reaction layer of stainless steels.
作者
纪艳卿
戚诚康
李博
李治辉
李飞
Ji Yanqing;Qi Chengkang;Li Bo;Li Zhihui;Li Fei(Xi'an Aerospace Engine Co.,Ltd.;Shanghai Key Laboratory for High Temperature Materials and Precession Forming,Shanghai Jiaotong University)
出处
《特种铸造及有色合金》
CAS
北大核心
2023年第4期565-569,共5页
Special Casting & Nonferrous Alloys
