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回转窑托轮底座修理的注意事项及修复方法

       回转窑托轮轴面的修复方法:托轮轴为45中碳钢,而45钢由于含碳量较高,焊接性较差,容易出现裂纹和淬硬组织。先介绍45钢的补焊工艺:选用低氢碱性焊条J506或J507焊接。焊接量不大时采用铝镍奥氏体不锈钢A302焊条。采用履带式加热器或氧乙炔焰进行预热,加热温度为200~250℃。以降低热影响区的淬硬倾向,防止产生冷裂纹。焊接时宜采用直流反极性及小规范参数。多层焊时,第一道焊缝易出现裂纹,应选用小直径焊条、低焊速。焊接过程中,宜采用锤击焊缝金属的方法。长时间用油脂润滑,致使脏物不能及时排出,应创造条件使用稀油润滑。


活性石灰回转窑2

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