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①鍛件大裁面處(檢驗(yàn)非金屬同化、晶粒度）

②零件的高應(yīng)力部位(檢驗(yàn)同化、晶粒度、過熱）

③鍛件變形激烈、溫升嚴(yán)里處(檢驗(yàn)過熱和晶粒度）

④鋁合金鍛件檢驗(yàn)過熱、過燒，應(yīng)在其小裁面并湊近其外貌部位取樣

無損檢驗(yàn)：

對(duì)解放鍛件舉辦無損檢驗(yàn)，要緊用超聲波探傷，有些鍛件也可在粗加工后用熒光滲透、磁粉深透、X—射線等無損檢驗(yàn)法。超聲波檢驗(yàn)分為全面檢驗(yàn)和分區(qū)檢驗(yàn)兩種。分區(qū)檢驗(yàn)是在鍛件上的差別部位采取差別靈敏度等級(jí)的標(biāo)準(zhǔn)舉辦嘗試。區(qū)域的劃分應(yīng)合乎零件圖樣的要求，并在鍛件圖樣中做出響應(yīng)的規(guī)定。

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Microstructure

1 Forging large cutting surface (testing non-metal assimilation, grain size)

2 high stress parts of the part (test assimilation, grain size, overheating)

3 Forgings are intensely deformed and the temperature rises to the extreme (testing overheat and grain size)

4 aluminum alloy forgings are tested for overheating and over-burning. They should be sampled on their small cuts and close to their appearance.

Non-destructive testing:

For the non-destructive testing of liberation forgings, it is necessary to use ultrasonic flaw detection. Some forgings can also be used for non-destructive testing such as fluorescence penetration, magnetic powder penetration, and X-ray after roughing. Ultrasonic testing is divided into two types: comprehensive inspection and partial inspection. Partition inspection is a standard attempt to adopt differential sensitivity levels on different parts of the forging. The division of the area shall be in accordance with the requirements of the part drawings and shall be responsive in the forging drawings.