摘要
在腐蚀介质为Na Cl∶Na_2SO_4=1∶2、热腐蚀温度为650℃条件下,对锅炉用Super304H、TP347H和HR3C不锈钢焊接接头进行了模拟锅炉实际工作环境的热腐蚀试验,研究了腐蚀温度和时间等对焊接接头不同区域抗热腐蚀性能的影响,并对腐蚀形貌和腐蚀产物进行了分析。结果表明,对比3种锅炉用钢焊接热影响区的热腐蚀增重率可见,TP347H锅炉钢热影响区的热腐蚀增重率最小,其次为Super304H锅炉钢,而HR3C锅炉钢热影响的耐热腐蚀性能最差;Super304H焊接接头、TP347H焊接接头和HR3C焊接接头的腐蚀区域宽度分别为48、38和88μm,腐蚀区形态疏松且存在明显腐蚀孔洞。
Corrosive conditions under corrosive medium is NaCl：Na2SO4=1：2, hot corrosion temperature is 650 ℃, the super 304H, TP347H and HR3C stainless steel welded joints were used to simulate the hot corrosion test of the actual working environment of the boiler, the effects of corrosion temperature and time on the corrosion resistance of the welded joints in different areas were studied, and the corrosion morphology and corrosion products were analyzed. The results show that compare with three kinds of boiler steel welding heat affected zone heat corrosion weight gain rate, the heat corrosion weight gain rate of TP347H boiler steel heat affected zone is minimum, and the second is super 304H boiler steel, while the heat resistance corrosion resistance of HR3C boiler steel is the worst. The corrosion area width of super 304H welded joint, TP347H welding joint and HR3C welding joint are 48, 38and 88 μm, respectively, and the corrosion area form loose and obvious corrosion holes.
出处
《铸造技术》
北大核心
2017年第10期2506-2509,共4页
Foundry Technology
