Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Method for improving high-temperature sulfur and chlorine corrosion resistance of superheater tube and superheater tube
The invention provides a method for improving high-temperature sulfur and chlorine corrosion resistance of a superheater tube and the superheater tube, and the method comprises the following steps: mixing nano boride, NiCrBSi powder and a binder to prepare a coating, and spraying a coating on the surface of the superheater tube by adopting a slurry method; and the coating is subjected to induction deposition sintering and laser remelting treatment, and the superheater tube resistant to high-temperature sulfur and chlorine corrosion is obtained. According to the method, a proper amount of nano boride is added into NiCrBSi powder, so that the microhardness and the thermal corrosion resistance of the coating are improved. The coating is rapidly solidified through induction deposition sintering, the dilution rate of a pipe base material to the coating is very low, and it is guaranteed that components of the coating are not affected. Through laser remelting heat treatment, remelting of a small number of particles which are not completely melted and boride hard particles in the coating is further promoted, the bonding strength between the hard particles and a coating matrix is improved, and the superheater tube prepared through the method has excellent high-temperature sulfur and chlorine corrosion resistance.
本发明提出一种提高过热器管抗高温硫氯腐蚀性能的方法及过热器管，所述方法包括包括如下步骤，将纳米硼化物、NiCrBSi粉末与粘结剂混合制备成涂料，采用料浆法在过热器管表面喷涂涂层；对涂层进行感应熔敷烧结和激光重熔处理，得到抗高温硫氯腐蚀的过热器管。所述方法在NiCrBSi粉末中添加适量的纳米硼化物，提高了涂层的显微硬度和抗热腐蚀性能。感应熔敷烧结使涂层快速凝固，管基材对其稀释率很低，保证了涂层成分不受影响。通过激光重熔热处理，进一步促进涂层中少量未完全熔化的颗粒和硼化物硬质颗粒重新熔化，提高硬质颗粒与涂层基体之间的结合强度，由此方法制备的过热器管具有优异的抗高温硫氯腐蚀性能。
Method for improving high-temperature sulfur and chlorine corrosion resistance of superheater tube and superheater tube
The invention provides a method for improving high-temperature sulfur and chlorine corrosion resistance of a superheater tube and the superheater tube, and the method comprises the following steps: mixing nano boride, NiCrBSi powder and a binder to prepare a coating, and spraying a coating on the surface of the superheater tube by adopting a slurry method; and the coating is subjected to induction deposition sintering and laser remelting treatment, and the superheater tube resistant to high-temperature sulfur and chlorine corrosion is obtained. According to the method, a proper amount of nano boride is added into NiCrBSi powder, so that the microhardness and the thermal corrosion resistance of the coating are improved. The coating is rapidly solidified through induction deposition sintering, the dilution rate of a pipe base material to the coating is very low, and it is guaranteed that components of the coating are not affected. Through laser remelting heat treatment, remelting of a small number of particles which are not completely melted and boride hard particles in the coating is further promoted, the bonding strength between the hard particles and a coating matrix is improved, and the superheater tube prepared through the method has excellent high-temperature sulfur and chlorine corrosion resistance.
本发明提出一种提高过热器管抗高温硫氯腐蚀性能的方法及过热器管，所述方法包括包括如下步骤，将纳米硼化物、NiCrBSi粉末与粘结剂混合制备成涂料，采用料浆法在过热器管表面喷涂涂层；对涂层进行感应熔敷烧结和激光重熔处理，得到抗高温硫氯腐蚀的过热器管。所述方法在NiCrBSi粉末中添加适量的纳米硼化物，提高了涂层的显微硬度和抗热腐蚀性能。感应熔敷烧结使涂层快速凝固，管基材对其稀释率很低，保证了涂层成分不受影响。通过激光重熔热处理，进一步促进涂层中少量未完全熔化的颗粒和硼化物硬质颗粒重新熔化，提高硬质颗粒与涂层基体之间的结合强度，由此方法制备的过热器管具有优异的抗高温硫氯腐蚀性能。
Method for improving high-temperature sulfur and chlorine corrosion resistance of superheater tube and superheater tube
提高过热器管抗高温硫氯腐蚀性能的方法及过热器管
GUO RONGXI (Autor:in)
23.01.2024
Patent
Elektronische Ressource
Chinesisch
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