Determination of resistance to intergranular corrosion of stainless steels - part 2 : ferritic , austenitic and ferritic - austenitic duplex stainless steels - corrosion test in media containing sulfuric acid iso 3651 - 2 : 1998 ; german version en iso 3651 - 2 : 1998 不锈钢抗晶间腐蚀性能的测定.第1部分:奥氏体和铁氧奥
Used to manufacture outdoor equipment , building materials , heat - resistant parts and parts that are difficult to make heat treatment for chemical , coal , petroleumindustries that have high repuirements for their intergranular corrosion resistant proper ties 用于抗晶间腐蚀性要求高的化学、煤炭、石油产业的野外露天机械、建材、耐热零件及热处理有困难德零件。
With carbon content increasing , the carbide network on the fertile grain boundary sprouting and propagating . the fracture mode has been changed from cleavage to along boundary and the intergranular corrosion induced by solution chromium decreasing 随碳含量提高，晶界上碳化物萌发、扩展呈网状，铸件脆断由解理断裂发展为沿晶断裂，同时铁素体不锈钢晶间腐蚀倾向增大。
The boundary of ferrite has been clarified and fined by adding re into crsomo . the intergranular corrosion induced by solution chromium decreasing can be restrained for nb , v , ti combing carbon in the steel . the wear resistance of stainless steel can be increased for the precipitation of microalloyed carbides 其中，稀土能够净化铁索体晶界，并起到变质剂的作用，细化铁素体晶粒，改善不锈钢的韧性；铌、钒、钛能够与钢中的碳结合，减少固溶铬的损失，从而避免晶间腐蚀，同时细小微合金碳化物的沉淀析出可提高不锈钢的耐磨性。
