Low magnification organization:
1 metal flow line has a requirement or can reflect the reasonable flow direction of the metal
2 horizontal low-power test strips should be taken at the large cut surface
3 longitudinal low-power test strips should be taken on the main axis section of the part
4 Forgings directly cast from steel ingots, the low-magnification test piece should be cut at one end of the near mouth
1 Cut the test piece in the part where the forging is prone to overheating
2 Cut the test piece in a small part of the deformation of the forging
3 Under normal circumstances, the fracture can be tested on the lateral low-power test piece.