macroscopic metallographic analysis -凯发官网入口首页

macroscopic metallographic analysis

purposes:

to evaluate whether there is a hole and inclusions in die casting and welding line; to decide the organization direction of die casting; whether there exits obvious flaws of no penetration in weld line.

applications:

cast iron, steel, nonferrous metals, welding parts and so on.

tested flow:

sampling→cleaning→inlaying→grinding→polishing→etching→observeing

reference standard:

gb/t 3246.2-2000 inspection method for structure of wrought aluminium and aluminium alloys products—inspection method for macrostructure

gb/t 226-1991 etch test for macrostructure and defect of steels

classic photos:

the macro metallographic of stainless steel fillet weld	the macro metallographic of copper rod