【摘要】 采用TIG(钨极氩弧焊)表面重熔工艺对耐空泡腐蚀堆焊材料进行改性加工,与磨削表面加工对比研究了TIG表面重熔对空泡腐蚀的影响。结果表明:在45h空泡腐蚀试验后,磨削试样的累积失重量是TIG表面重熔试样的1.57倍;相变产生的马氏体的剥落是堆焊材料质量损失的主要形式,而TIG表面重熔工艺延迟了奥氏体到马氏体的相变,降低了质量损失;堆焊材料腐蚀的大量裂纹沿着马氏体片层发展,而TIG重熔表面抑制了裂纹发展,避免了大的物质剥落。更多还原

【Abstract】 Surface welding material was treated by tungsten inert gas(TIG) surface remelting process for its modification.Compared with grinding process,the effect of TIG surface remelting process on cavitation corrosion resistance was investigated.After 45h of cavitation corrosin test,the mass loss of the specimen with ground surface was 1.57 times that of the specimen with TIG remelted surface.The fracture of martensite transformed by austenite was the main form of mass loss.TIG surface remelting process put off the transformation-saturated point and decreased mass loss.TIG remelting process repressed crack growth and avoided the falling off of big particles.更多还原