Easily wearing position of draught fan case surface,made from A 3 steel,is forced to take build-up welding process of GTC wear resisting alloy,and the service life of it is increased by a factor of 9.

• 采用GTC耐磨合金堆焊工艺，表面强化济钢焦化厂A3钢引风机外壳易磨损部位，使用寿命提高8倍以上。