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首页> 外文期刊>ISIJ international >Steam Oxidation Resistance of Ni-Cr Thermal Spray Coatings on 9Cr-1Mo Steel. Part 2:50Ni-50Cr
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Steam Oxidation Resistance of Ni-Cr Thermal Spray Coatings on 9Cr-1Mo Steel. Part 2:50Ni-50Cr

机译:9Cr-1Mo钢上Ni-Cr热喷涂层的抗蒸汽氧化性能。第2部分:50Ni-50Cr

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摘要

The present work is focused on the steam oxidation resistance of 50%Ni-50%Cr metallic coatings produced using atmospheric plasma spray (APS) and high velocity oxy fuel (HVOF) spray processes on 9Cr-1Mo type steel substrate. Thickness of the coatings obtained in the HVOF and APS processes were about 60 and 40μm respectively. The steam oxidation resistance of the coatings was evaluated at four different temperatures viz., 600, 650, 700 and 750℃. The results showed that the thick and denser HVOF coating yielded a better steam oxidation resistance than the thin and porous APS coatings. At prolonged aging (1 000 h), the HVOF coating showed the best protection in all tested steam temperatures. APS coating performed satisfactorily well till the 100 h of test duration. But, it started the scale initiation at the coating interface and incorporation of scales occurred at 1 000 h of steam oxidation test. The reason for the protective-ness by HVOF coating and failure of APS coatings at prolonged aging are discussed in detail.
机译:目前的工作集中在使用大气等离子喷涂(APS)和高速氧燃料(HVOF)喷涂工艺在9Cr-1Mo型钢基材上生产的50%Ni-50%Cr金属涂层的抗蒸汽氧化性。通过HVOF和APS工艺获得的涂层厚度分别约为60和40μm。在四个不同的温度(即600、650、700和750℃)下评估了涂层的抗蒸汽氧化性。结果表明,厚而致密的HVOF涂层比薄而多孔的APS涂层具有更好的抗蒸汽氧化性能。在长时间老化(1000小时)时,HVOF涂层在所有测试的蒸汽温度下均显示出最佳的保护效果。直到100小时的测试持续时间,APS涂层的表现都令人满意。但是,它在涂层界面处开始产生水垢,并且在蒸汽氧化试验1000 h时发生水垢的并入。详细讨论了HVOF涂层的保护性原因以及长时间老化后APS涂层失效的原因。

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