双相不锈钢腐蚀磨损机理初探

CORROSIVE WEAR MECHANISM OF DUPLEX STAINLESS STEEL

用稳态腐蚀磨损试验机研究了α＋γ双相不锈钢在６９％Ｈ３ＰＯ４介质中的腐蚀磨损行为，并与奥氏体和铁素体不锈钢对比．ＴＥＭ研究结果表明，双相不锈钢中的γ相由于磨损变形促成高密度位错网络的胞状结构得到强化而具有优秀的耐腐蚀磨损性能．

steady corrosive wear was employed to study corrosive wear behavior of duplex stainless steel comparing to that for austenitic and ferritic stainless steels in 69%H3PO4. The microstructures of subsurface were examined by TEM and showed that the hardness of worn surface was largely enhanced due to the high density of dislocations induced by wear surface deformation, shich were blocked by precipitation perticles in austenitic phase with low content(6.4Wt%) of nickle. It indicates that surface deformation strengthening is an effective method to improve corrosive wear resistance of alloys.