抗高温氧化腐蚀专用焊条

通过A402，A302，A202及Cr24Ni7不锈钢焊条熔敷金属的抗高温氧化腐蚀性能对比试验分析，设计了新的专用焊条合金系统Cr26Nil6，并在焊条药皮中分别添加微量稀土氧化物La2O3及CeO2，研究不同稀土氧化物添加量对焊条熔敷金属在空气中和含硫气氛中抗高温氧化及腐蚀性能的影响，从而确定了合理的稀土氧化物加入量。最后，对合金系统为Cr26Nil6的专用焊条进行工艺评价。结果表明，专用焊条工艺性好，用该焊条所焊焊缝的性能可满足抗高温氧化腐蚀使用要求。微量稀土氧化物在焊条药皮中的加入，对其熔敷金属的抗高温氧化性能有所提高，对在含硫气氛中的抗高温腐蚀性能有显著提高；加入La2O3的焊条熔敷金属比加入CeO2的焊条熔敷金属抗高温氧化及硫化腐蚀性能更好。

Special electrode with high temperature corrosive resistance

Based on testing and analyzing of the high temperature oxidation and sulphidation resistance of electrodes A402,A302,A202 and Cr24Ni7, the special electrode with new alloy system Cr26Nil6 is designed.Through the addition of rare earth oxidation La_2O_3 and CeO_2 into the electrode coating, the effect of rare earth oxidation on high temperature oxidation and sulphidation resistance is studied and the rational addition amount is suggested. The paper also evaluates the characteristic of the electrodes. The result shows that the electrode can satisfactorily meet the requirement of high temperature oxidation and sulphidation resistance. The addition of rare earth oxidation can improve the high temperature resistance, especially on sulphidation condition.. The electrode with La_2O_3 has better performance than the electrode with CeO_2.