Cr和Al对Fe-Cr-Al系耐热钢1100℃高温间歇抗氧化性能影响  

Effect of Cr and Al on the Intermittent Oxidation Resistance of the Fe-Cr-Al Heat-Resistant Steel at 1100℃

作　　者：张世杰[1] ZHANG Shi-jie(Lang Fang Technical College of Profession,Langfang 065000,Hebei,China)

机构地区：[1]河北廊坊职业技术学院,河北廊坊065000

出　　处：《铸造》2022年第6期746-750,共5页Foundry

摘　　要：采用控制变量法研究了Fe-Cr-Al系耐热钢1100℃高温间歇抗氧化性能。结果表明,在以Cr、Al和Si为主要抗氧化合金元素配比的几种合金中,当Cr元素含量小于12%时,合金表面不能形成连续、致密及完整的氧化膜,表层氧化膜没有很好的附着性,氧化膜脱落明显,不能达到抗氧化性能要求;当Cr元素含量达到12%后,合金表面形成以Al_(2)O_(3)、SiO_(2)、Cr_(2)O_(3)、Fe_(2)O_(3)、(Fe_(0.53)Al_(0.47))_(2)O_(3)氧化物为主的结构复杂、错落的复合氧化膜。Cr元素含量的提高,增强了表层氧化膜的附着性,氧化膜致密、连续且分布均匀,达到了高温抗氧化性能的要求,同时也获得了很好的经济性。The intermittent oxidation resistance of Fe-Cr-Al heat resistant steel at 1100℃was studied by control variate method.The results showed that when the content of Cr was less than 12%,the continuous,dense and complete oxide film could not be formed on the surfaces of several alloys with Cr,Al and Si as the main anti-oxidation elements.The surface oxide film had no good adhesion,and the oxide film fell off obviously,which could not meet the requirements of anti-oxidation performance;When the content of Cr reached 12%,the complex and scattered oxide films were formed on the surface of the alloy,which were mainly composed of Al_(2)O_(3),SiO_(2),Cr_(2)O_(3),Fe_(2)O_(3),(Fe_(0.53)Al_(0.47))_(2)O_(3) oxides.With the increase of the Cr content,the adhesion of surface oxide film was enhanced.The oxide film was compact,continuous and evenly distributed,which met the requirements of high temperature oxidation resistance and obtained good economy at the same time.

关 键 词：耐热钢 高温抗氧化性能 氧化膜 氧化增重速率 

分 类 号：TG142.73[一般工业技术—材料科学与工程]