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低倍組織：

①金屬流線有要求處或能反映金屬合理流向的斷面上切取流線檢驗(yàn)試樣

②橫向低倍試片盡大概取在大裁面處

③縱向低倍試片應(yīng)取在零件的主軸線斷面上

④用鋼錠直接鑄造成形的鍛件，其低倍試片應(yīng)在近目口一端處切取

低倍斷口：

①在鍛件易產(chǎn)生過熱的部位切取試片

②在鍛件變形里小的部位切取試片

③普通環(huán)境下，可在橫向低倍試片上檢驗(yàn)斷口

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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

Low-fold fracture:

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.