【摘要】 在高炉风口表面制备一层适宜的金属-陶瓷梯度热障涂层,是提高风口寿命的一种有效的方法。本文旨在验证在风口上制备金属-陶瓷梯度保护层,提高高炉风口寿命的可行性。通过大型的有限元仿真软件AN SYS,模拟分析了在紫铜表面喷涂陶瓷热障层的隔热效果,并且探讨了HVOF涂层的性能。结果发现,仅仅0.4mm厚的ZrO2涂层就可以使铜基体温降200℃左右,而且超音速火焰喷涂打底的金属-陶瓷涂层的抗氧化性、热震性优于其他喷涂方法,这表示能够从材料和工艺两方面解决风口喷涂陶瓷层易脱落的问题。证明了在风口上喷涂金属-陶瓷梯度热障涂层的可行性以及利用HVOF打底层制备金属-陶瓷热障层的优势。更多还原

【Abstract】 Spraying metal-ceramic gradient thermal barrier coating on the work surface is a valid method to prolong the life of blast furnace （BF） tuyere. In order to validate the feasibility of the method, the heat insulation effect of ZrO₂ coating sprayed on the thick copperplate surface was analyzed by the finite element software AN SYS, and the property of HVOF coating was discussed. As the result, only 0.4 mm ZrO₂ coating can reduce the temperature of copper substrate 200℃ approximately, and the oxidation resistance and thermal shock resistance of coating with tie coating spayed by HVOF are excellent than other thermal spraying method. The feasibility of metal-ceramic gradient coating on the work surface of BF tuyere was proved, and the superiority of HVOF tie coating on the work surface of BF tuyere was confirmed.更多还原