中文摘要：

在00Cr19Nb Ti不锈钢基础上,通过稀土Ce微合金化的方法制备了三种船舶排气岐管用不锈钢,研究了稀土元素Ce对不锈钢在连续高温环境下的抗高温氧化行为的影响,并分析了其作用机理。结果表明,稀土Ce微合金化的不锈钢在980℃高温不同氧化时间下的氧化物主要由Mn1.5Cr1.5O4、Cr1.3Fe0.7O3、Cr2O3和Si O2组成,氧化物层的相组成随着氧化时间变化稳定性较高;稀土Ce元素的添加可以增加表面氧化物层中Cr的含量,提高Cr2O3氧化膜层的致密性,从而改善排气岐管不锈钢的高温抗氧化性能。

英文摘要：

Based on OOCr19NbTi stainless steel, three kinds of stainless steel for ship exhaust pipe were prepared through micro alloying Ce. Effect of rare earth element Ce on high temperature oxidation behavior of the stainless steel continuously in high temperature envinmment was investigated, and its mechanism was analyzed. The results show that the oxides of Ce micro alloyed stainless steel in high temperature of 980 ℃ with different oxidation time are mainly composed of Mn1.5Cr1.5O4, Cr1.3Fe0.7O3, Cr2O3 and SiO2, and the oxides have high stability with prolonging oxidation time. Addition of Ce can increase Cr content in the oxidation layer, and improve the compactness of Cr2O3 nxidalion film, so enhance the high temperature oxidation resistance of stainless steel for exhaust pipe.