【作者】 魏琪； 栗卓新； 齐鑫哲； 王江萍；

【Author】 WEI Qi, LI Zhuo-xin, QI Xin-zhe, WANG Jiang-ping (The CoUege of Materials Science and Engineering, Beijing University of Technology, Beijing 100022)

【机构】 北京工业大学材料科学与工程学院；

【摘要】 目前,在锅炉“四管”防护上使用的电弧喷涂材料主要有铁基和镍基两大类。铁基材料虽然成本较低,但是抗高温氧化和抗热腐蚀性能不理想;镍基材料虽然抗高温氧化和抗热腐蚀性能较好,但是价格昂贵,影响了它的广泛应用。因此,能否研制出可满足锅炉“四管”使用要求的、性能优异、成本低廉的铁基喷涂材料已经成为人们关注的重点。本文通过高温氧化试验、涂盐腐蚀试验和涂层表面硬度试验,并采用与45CT喷涂丝和铁铬铝喷涂丝性能对比的方法,研究了三种新型锅炉“四管”用铁基粉芯喷涂丝的抗高温氧化和抗热腐蚀性能。研究表明:所研究的新型铁基粉芯喷涂丝具有良好的抗高温氧化和抗热腐蚀性能,涂层的抗高温氧化和抗热腐蚀性能随铬含量的增加而提高。更多还原

【Abstract】 At present, the electric arc spray materials used in the protection of the boiler tubes are mostly classified as Fe-base material and Ni-base material. The Fe-base material has the character of low cost, but its high temperature oxidation and hot corrosion resistance are not very satisfactory; by contraries, Ni-base material has excellent high temperature oxidation and hot corrosion resistance, but its cost is very high and this influences its wide application. Therefore, how to develop an excellent performance and low cost Fe-base spray material to meet the application of the boiler tubes have been a noticeable focus in the field of material science. By the tests of high temperature oxidation, salt coating corrosion and coating hardness, we deeply studied high temperature oxidation and hot corrosion resistance of three kinds of new Fe-base cored spray wires, and in contrast to 45CT spray wire and Fe-Cr-Al spray wire. Results show that the new Fe-base cored spray wires have excellent high temperature oxidation and hot corrosion resistance, and that with the content of Cr increasing, high temperature oxidation and hot corrosion resistance of new cored spray wire coating are improved.更多还原