中国材料进展
中國材料進展
중국재료진전
MATERIALS CHINA
2011年
12期
1-5
,共5页
奥氏体%耐热钢%氧化铝%抗氧化%抗蠕变
奧氏體%耐熱鋼%氧化鋁%抗氧化%抗蠕變
오씨체%내열강%양화려%항양화%항연변
austenitic heat-resistant steels%alumina scale%oxidation resistance%creep resistance
新一代奥氏体耐热钢在氧化过程中自发形成连续、稳定、致密的氧化铝层，与传统的在金属表面形成Cr2O3保护层的不锈钢相比，具有更优异的高温抗氧化性能和良好的抗蠕变能力。详细地分析了新型抗高温氧化奥氏体耐热钢的抗氧化机理，并且探讨了一些合金元素对新型奥氏体耐热钢在高温含10％水蒸气的气氛中抗氧化性能的影响。指出新一代奥氏体耐热钢在氧化过程中形成稳定的纳米级沉淀相NbC，以及在高温时形成的稳定Fe2Nh和NiAl沉淀相，有力地改善了其抗蠕变性能和高温力学性能。最后展望了这类以Al2O3为抗氧化层的新型奥氏体耐热钢的应用前景。
新一代奧氏體耐熱鋼在氧化過程中自髮形成連續、穩定、緻密的氧化鋁層，與傳統的在金屬錶麵形成Cr2O3保護層的不鏽鋼相比，具有更優異的高溫抗氧化性能和良好的抗蠕變能力。詳細地分析瞭新型抗高溫氧化奧氏體耐熱鋼的抗氧化機理，併且探討瞭一些閤金元素對新型奧氏體耐熱鋼在高溫含10％水蒸氣的氣氛中抗氧化性能的影響。指齣新一代奧氏體耐熱鋼在氧化過程中形成穩定的納米級沉澱相NbC，以及在高溫時形成的穩定Fe2Nh和NiAl沉澱相，有力地改善瞭其抗蠕變性能和高溫力學性能。最後展望瞭這類以Al2O3為抗氧化層的新型奧氏體耐熱鋼的應用前景。
신일대오씨체내열강재양화과정중자발형성련속、은정、치밀적양화려층，여전통적재금속표면형성Cr2O3보호층적불수강상비，구유경우이적고온항양화성능화량호적항연변능력。상세지분석료신형항고온양화오씨체내열강적항양화궤리，병차탐토료일사합금원소대신형오씨체내열강재고온함10％수증기적기분중항양화성능적영향。지출신일대오씨체내열강재양화과정중형성은정적납미급침정상NbC，이급재고온시형성적은정Fe2Nh화NiAl침정상，유력지개선료기항연변성능화고온역학성능。최후전망료저류이Al2O3위항양화층적신형오씨체내열강적응용전경。
This paper introduces a new class of high-temperature oxidation-resistant austenitic heat-resistant steels which offer a continuous, stable, spontaneous dense layer of alumina with superior high-temperature oxidation resistance and creep resistance to conventional chromia（ Cr2O3 ）-forming stainless steels. Detailed analyses of the oxidation mechanisms and alloying effects on the oxidation behavior of these newly developed alumina-forming steels at high temperatures in air with 10% water vapor were presented. It was also found that the creep resistance and high-temperature mechanical properties for these heat-resistant austenitic steels were improved due to precipitations of stable nanosized NbC , Fe2Nb and NiAl precipitates at elevated temperatures. The perspective of utilizing these novel alumina-forming austenitic stainless steels as engineering components is analyzed and discussed.
