CO_2浸渍器磨损面的修复

Repair of Worn Surface of CO_2 Impregnator

为了修复CO2浸渍器磨损面,防止CO2发生泄漏,保证膨胀烟丝的正常生产,选用德国特种低温耐磨材料UTP34N作为修复面的熔合层和填充层,以难熔金属的碳化物为硬质相、以钢为粘接剂、用粉末冶金方法制得的合金Co-WC作为外层喷涂材料,利用冷焊堆焊和超声速热喷涂技术对CO2浸渍器门盖和锁环的磨损面进行了局部修复。修复后,浸渍器门盖和罐体之间密封间隙由2.1 mm减少到0.8 mm,使用超过1.25倍压力的水压进行试验,密封效果良好,达到了安全和工艺要求,延长了门盖和锁环的使用寿命。

In order to repair the worn surface of CO2 impregnator to prevent CO2 leaking, special low temperature wear-resistant material UTP34N of Germany was chosen as the fusion layer and caulking layer material of repaired surface and alloy Co-WC （ an alloy from powder metallurgy comprising carbide of high melting metal as hard phase and steel as cementing phase ） as surface layer spray coating material, the impregnator＇s lid and annular lock were partially repaired with cold-welding surfacing and supersonic thermal spraying. After repairing, the clearance between the lid and impregnator＇s body reduced from 2. 1 to 0.8 ram; the results of hydraulic pressure test conducted under more than 1.25 times pressure indicated that the seal ability was satisfactory in terms of safety and technology;and the working life of lid and annular lock were prolonged.