R20型燃气轮机在焦炉煤气下导向叶片高温防护涂层研究  

The Research on High-temperature Protection Coating for Turbine Stationary Blade of R20 Gas Turbine Under Coke Oven Gas

作　　者：王辉 吴航 曹利锋 WANG Hui;WU Hang;CAO Li-feng(Zhuzhou AECC PST Nanfang Gas Turbine Company Limited,Zhuzhou 412000,China)

机构地区：[1]株洲航发动科南方燃气轮机有限公司

出　　处：《汽轮机技术》2019年第5期397-400,共4页Turbine Technology

摘　　要：利用超音速火焰喷涂技术制备了3种抗高温腐蚀和冲蚀的涂层。对3种涂层的抗冲蚀和高温氧化性能做了预研究,然后选出性能较好的进行了现场装机试验。结果表明:超音速火焰喷涂制备MCrAlY+Al2O3(机械混合)涂层与NiCr+Cr3C2涂层抗高温氧化腐蚀与抗冲蚀性能较好,850℃+100h条件下基本没有氧化,可以作为现场试验涂层之一;R20型燃气轮机在焦炉煤气下导叶涂层综合性能由好到差排序为:MCrAlY+Al2O3涂层>NiCoCrAlYTa涂层>NiCoCrAlY涂层>NiCr+Cr3C2涂层;对于气质较差的焦炉煤气,MCrAlY+Al2O3涂层可以延长叶片使用寿命约3000h。Three coatings with hot corrosion and erosion properties were deposited by high-velocity oxygen-fuel(HVOF).The anti-erosion and high-temperature oxidation of these coatings were performed in laboratory,then select the better performance coatings for on-site installation test.The results show that the MCrAlY+Al 2O 3(mechanical mixed)coating and NiCr-Cr 3C 2 coating exhibited better hot corrosion and erosion resistance;both coating exhibited excellent oxidation resistance at 850℃for 100h,which can be used as field test coating.In the coke oven gas environment,the performance of the coating on the turbine stationary blade of R20 gas turbine is sorted from good to bad:MCrAlY+Al 2O 3 coating>NiCoCrAlYTa coating>NiCoCrAlY coating>NiCr+Cr 3C 2 coating.

关 键 词：R20燃气轮机 热喷涂 高温腐蚀 

分 类 号：TB304[一般工业技术—材料科学与工程]