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为了研究焊接工艺参数对电渣焊缝的机械性能和抗裂性能的影响,有时需要研究电渣焊缝的一次组织。但用常用的硝酸酒精侵蚀,一次组织往往被二次组织掩盖。本文选用下面的特殊侵蚀剂对19Mn5、14MnMoV等钢电渣焊缝一次组织进行了显示,效果较好。 1 侵蚀剂配方和操作方法侵蚀剂配方:蒸馏水500ml,酒精500ml,HCl50ml,FeCl_3 30g,CuCl_2 1g,SnCl_2 0.5g 按通常的制样方法制备金相试样,然后用棉球蘸
In order to study the influence of welding parameters on the mechanical properties and crack resistance of ESR, it is sometimes necessary to study the primary organization of ESR. But with the common nitric acid alcohol erosion, a tissue is often covered up by the second organization. This article selected the following special etchant 19Mn5, 14MnMoV and other steel ESR weld shows a good effect. 1 Erosion agent formula and method of operation Erosion agent formula: distilled water 500ml, alcohol 500ml, HCl50ml, FeCl_3 30g, CuCl_2 1g, SnCl_2 0.5g prepared by the usual sample preparation metallographic sample, and then dipped in cotton balls