高温合金GH4065A的恒温静态氧化行为  

Isothermal and static oxidation behavior of superalloy GH4065A

作　　者：黄烁 张北江[1] 田强[1] 赵光普[1] 胥国华[1] 秦鹤勇[1] 

机构地区：[1]钢铁研究总院高温材料研究所,北京100081

出　　处：《钢铁研究学报》2016年第7期55-60,共6页Journal of Iron and Steel Research

基　　金：国家高技术研究发展计划资助项目(2012AA03A510);国家重点基础研究发展计划资助项目(2010CB631203);大飞机关键构建成型共性技术研究(2012ZX04010-081)

摘　　要：研究了新型镍基高温合金GH4065A在650~750℃的静态氧化行为,基于对氧化动力学与氧化产物的分析,探讨了合金的氧化机制。结果表明：采用平均氧化增重速率指标评定GH4065A合金在650~750℃温度范围内均为完全抗氧化级别,试验条件下合金的抗氧化能力与典型涡轮盘材料FGH96、GH4720Li合金相当;合金的氧化产物主要为内层富铝的氧化物颗粒、外侧富铬的氧化物膜及表面金红石型TiO_2颗粒,TiO_2颗粒在氧化温度超过700℃后开始生成;合金的氧化动力学遵循抛物线型规律,受钛离子与铬离子穿过氧化膜的扩散过程共同控制。The static oxidation behavior of new nickel-based superalloy GH4065 Aat the temperature range of 650—750℃in air was investigated by isothermal static oxidation testing.The oxidation mechanism was discussed on the basis of oxidation kinetics and the analyses of oxidation product.The results show that GH4065 Aalloy characterizes with full oxidation resistance at the temperature range of 650-750℃,assessed by the indicator of average oxidation weight gain rate.The oxidation resistance performance of GH4065 Aalloy is equivalent to typical high performance turbine disc alloy FGH96 and GH4720Li under the experimental conditions.The main oxidation products are internal Al-enriched oxide particles,outside Cr-enriched oxide scale and rutile TiO_2 particles on the surface which generate at the temperature higher than 700℃.The oxidation kinetics obeys parabolic rate law and is controlled mainly by the transmissions of Ti and Cr ions through the oxide scale.

关 键 词：GH4065A合金 变形高温合金 静态氧化 抗氧化能力 

分 类 号：V252[一般工业技术—材料科学与工程] TG132.3[航空宇航科学与技术—航空宇航制造工程]