摘要
制备了以Cr、Al、Si及适量的稀土元素为主要耐热合金元素的新型高碳、高铬Fe-Cr系耐热合金55Cr18Al3Si2VRE。结果表明,新合金55Cr18Al3Si2VRE的显微组织为铁素体组织;在模拟高温工况条件下,新合金形成的氧化膜主要以Al_2O_3、Cr_2O_3、SiO_2、Fe_2O_3以及含有Al、Fe元素所形成的氧化物组成;该工况条件下的扫面电镜(SEM)照片显示,氧化膜均匀致密。氧化质量增重试验结果也表明新合金具有较好的高温抗氧化性能。
A new high-carbon and high-chromium Fe-Cr heat-resistant alloy 55Cr18Al3Si2VRE was prepared with Cr, Al, Si and moderate rare-earth elements as the main heat-resistant elements. The results show that the microstructure of the new alloy is primary ferrite. Under the condition of simulation working at high temperature, the oxide film formed on the new alloy is mainly composed of Al_2O_3、Cr_2O_3、SiO_2、Fe_2O_3 and some oxide containing Al and Fe, In SEM pictures of the alloy treated at the simulated working condition, the oxide film is uniform and dense. The testing results of oxidation mass gain indicate that the new alloy presents outstanding high-temperature oxidation resistance.
出处
《铸造技术》
北大核心
2017年第9期2090-2092,2095,共4页
Foundry Technology
