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Erosion-oxidation behavior of thermal sprayed Ni20Cr alloy and WC and Cr3C2 cermet coatings

机译:热喷涂Ni20Cr合金以及WC和Cr3C2金属陶瓷涂层的冲蚀氧化行为

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An apparatus to conduct high temperature erosion-oxidation studies up to 850 °C and with particle impact velocities up to 15 m.s-1 was designed and constructed in the Corrosion Laboratories of IPEN. The erosion-oxidation behavior of high velocity oxy fuel (HVOF) sprayed alloy and cermet coatings of Ni20Cr, WC 20Cr7Ni and Cr3C2 Ni20Cr on a steel substrate has been studied. Details of this apparatus and the erosion-oxidation behavior of these coatings are presented and discussed. The erosion-oxidation behavior of HVOF coated Cr3C2 25(Ni20Cr) was better than that of WC 20Cr7Ni, and the erosion-oxidation regimes have been identified for these coatings at particle impact velocity of 3.5 m.s-1, impact angle of 90° and temperatures in the range 500 to 850 °C.
机译:IPEN腐蚀实验室设计并制造了一种设备,可进行高达850°C的高温腐蚀-氧化研究,其颗粒撞击速度可达15 m.s-1。研究了高速氧燃料喷涂合金的腐蚀氧化行为以及在钢基底上Ni20Cr,WC 20Cr7Ni和Cr3C2 Ni20Cr的金属陶瓷涂层的腐蚀行为。介绍并讨论了该设备的详细信息以及这些涂层的腐蚀氧化行为。 HVOF涂层的Cr3C2 25(Ni20Cr)的腐蚀氧化行为优于WC 20Cr7Ni的腐蚀-氧化行为,并且已经确定了这些涂层在粒子撞击速度为3.5 ms-1,撞击角度为90°和温度下的腐蚀氧化机制温度范围为500至850°C。

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