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用含有0.5～1％烷基磺酸钠饱和苦味酸水溶液,并加入少量新洁尔灭的腐蚀剂,能显示出奥氏体晶界和带状组织(以下简称饱和苦味酸溶液)。我们在腐蚀U74重轨纵向轧态样品上,发现了黑白相间的条带。但用硝酸酒精腐蚀时,则都是均匀的珠光体加少量的铁素体组织。为此,我们对用苦味酸腐蚀U74出现的条带的形态与性质对重轨性能的影响和它产生的原因进行了研究。一、浸蚀剂的作用浸蚀剂是显示金属组织的特定化学试
Saturated picric acid aqueous solution containing 0.5-1% sodium alkylsulfonate and adding a small amount of benzalkonium bromide can show austenite grain boundaries and ribbon structure (hereinafter referred to as saturated picric acid solution). We found a black and white band on the corroded U74 heavy gauge rail. But with nitric acid alcohol corrosion, they are uniform pearlite plus a small amount of ferrite. For this reason, we have studied the influence of picric acid on the performance of heavy rail by the morphology and properties of the banding of U74, and the reasons for its occurrence. First, the role of etchants Etching agent is to show the specific chemical test of the metal structure