摘要
研究了耐热炉排材料在950℃下的高温氧化行为。结果表明,ZG30Cr26Ni4和RTCr18为抗氧化级别,RTCr28Ni4为完全抗氧化级别。ZG30Cr26Ni4的氧化以氧向金属内部扩散为主;RTCr28Ni4的氧化则同时受氧向内部和金属离子向外扩散控制;RTCr18的氧化膜分为三层,氧化表层的形成以氧向内扩散为主,Si O2非晶层以内氧化层的形成则由金属离子向外扩散和氧向内扩散控制。ZG30Cr26Ni4和RTCr28Ni4的氧化膜较薄且致密完整,氧化膜对基体的附着性好,而RTCr18的氧化膜较厚,容易开裂剥落。相比之下,RTCr28Ni4的抗氧化性能最好。
The high-temperature oxidation behavior of the heat-resistant fire grate materials at 950 ℃ was investigated.The results show that the alloys ZG30Cr26Ni4 and RTCr18 are antioxidant levels,while the alloy RTCr28Ni4 is complete antioxidant level.The oxidation mechanism of the alloy ZG30Cr26Ni4 is mainly the oxygen diffusion into the metal,and RTCr28Ni4 depends on the oxygen diffusion into the metal and the outward diffusion of metal ions.While the oxidation film of RTCr18 is divided into three layers.The formation of the outer layer is mainly the oxygen diffusion into the metal,and the formation of oxide inside amorphous layer Si O2 is results from the oxygen diffusion into the metal and the outward diffusion of metal ions.The oxidation films of ZG30Cr26Ni4 and RTCr28Ni4 are thin and dense,and the adhesiveness to the matrix is also good.While the oxidation film of RTCr18 is thick and is easy to crack and peel off.By comparison,the oxidation resistance of the alloy RTCr28Ni4 is best.
出处
《铸造技术》
CAS
北大核心
2015年第10期2437-2442,共6页
Foundry Technology
关键词
耐热合金
炉排
氧化机制
heat-resistant alloy
fire grate
oxidation mechanism
