【作者】 谷琳；

【导师】 马壮；

【作者基本信息】 辽宁工程技术大学 ， 材料加工工程， 2009， 硕士

【摘要】 本文主要研究采用热化学反应法在Q235钢基体上制备Al₂O₃基陶瓷涂层,并用X射线衍射分析（XRD）、扫描电镜（SEM）等实验手段和力学分析方法,利用小样本数据挖掘技术对陶瓷涂层配方进行优化,并系统的研究了涂层制备工艺、优化涂层试样的组织结构、抗热震性和耐蚀性等。研究结果表明:通过小样本数据挖掘优化方案,采用热化学反应法在Q235钢基体材料表面制备的陶瓷涂层的性能得到了很大的提高。小样本数据挖掘得出:骨料中Al₂O₃的含量80%、粘结剂与固化剂之比5:1、骨料与粘结剂之比1.25:1为最佳方案,该方案在预喷涂Ni-Al中间层的Q235钢基体上制备出了性能较好的氧化铝基陶瓷涂层。X射线衍射分析结果表明:陶瓷涂层在600℃固化后有新相产生。扫描电镜结果表明:陶瓷涂层比较均匀致密,涂层具有网络结构,涂层与基体之间已无明显界限,两者结合良好。涂层性能检测结果表明:热化学反应陶瓷涂层使Q235钢的耐蚀性与耐磨性明显提高。更多还原

【Abstract】 In this paper, the author prepared the ceramic coating on the Q235 by thermo-chemical reaction method on the basis of the foundation carries of the predecessor. The X-ray diffraction, scanning electron microscopy and mechanics analysis methods were performed to analyze, Using small sample data mining techniques to optimize the formulation of the ceramic coating the organization structure, the thermal shock resistance, the corrosion resistance and so on.The investigated results indicated that through the small sample data mining optimization plan, the performance of ceramic coating covered on the Q235 matrix by thermo-chemical reaction method were obtained a very big promotion. The small sample data mining proved that, the best solution was that the Al₂O₃ content is 80% in the aggregate; the ratio between aluminum phosphate caking agent and the firming agent is 5:1, and the ratio between aggregate and the caking agent is 1.25:1. Through the thermo-chemical reaction method, it gained nice properties based on aluminum oxidation in pre-spraying Ni-Al coating of Q235. Its X-ray diffraction analysis results indicated that ceramic coating after 600℃solidification produced several new phases which strengthened binding force between the coating and the matrix. The result of scanning electron microscope indicated that the ceramic coating is quite even compactly and the coating has network structure. Besides, there is not obvious boundary between them and the bonding force is perfect. The result of coating performance test manifested that the ceramic coating has highly enhanced the corrosion resistance and wear resistance of Q235 steel.更多还原