高锰钢水韧处理后残留碳化物的显示.一般采用王水+FeCl_3溶液和硝酸酒精溶液。前者的腐蚀作用极强,能迅速显示组织,但钢中的夹杂物往往同时被蚀,留下凹坑,特别是在磨面上生成一层难以去掉的腐蚀产物,易造成假象,见图1、5。硝酸酒精作用温和,但仍会生成一层难于去掉的腐蚀产物。见图3。为解决此矛盾,经试验,用硝酸酒精侵蚀+盐酸酒精清洗(简称清洗法),显示效果较好。 Manganese steel toughness after the residual carbide display. Commonly used aqua regia + FeCl 3 solution and nitric acid alcohol solution. The former has extremely strong corrosion effect and can rapidly display the structure. However, the inclusions in the steel are often etched at the same time, leaving pits, especially the hard to remove corrosion products on the grinding surface, 5. Nitric alcohol is mild but still produces a hard-to-remove corrosion product. See Figure 3. To solve this contradiction, the test, with nitric acid alcohol + hydrochloric acid alcohol cleaning (referred to as washing method), showed good results.