環形鍛件在汽車制造、鐵路運輸、建筑、鑄造加工、金屬沖印等行業都有非常廣泛的運用，它的產品質量是廠家后續生產的前期保證，如果鍛件質量不好，會對生產產品的質量造成很大的影響甚至危害工人人身安全。因此。廠家要選擇質量可靠的鍛件作為原材料，這樣才能保證年生產順利進行。下面我們就環形鍛件的質量鑒別提供一些方法。

　　All ring forgings is widely used in automobile manufacturing, transportation, construction, casting processing, metal processing industry, the quality of its products is the pre manufacturers to ensure subsequent production, if the quality is not good, will cause great influence on the quality of the product even endanger the safety of workers. Therefore. Manufacturers should choose reliable quality forgings as raw materials, so as to ensure the smooth progress of the year. Below we provide some methods for quality identification of ring forgings.

　　對鍛件質量的檢驗主要有外部觀察法和內部測試法兩種。外部觀察法顧名思義就是通過觀察產品外觀如鍛件的形狀、幾何尺寸、表面狀況等進行觀察測量，看看其是否符合標準，是否有外部缺陷等。具體來說，就是檢查鍛件外型尺寸是否符合圖樣的規定，表面是否有缺陷，如鍛件表面的裂紋、褶皺、起泡、壓傷、坑洞、雜質、劃傷等物理缺陷。內部測試法檢驗的主要是鍛件的化學成分分析、宏觀和微觀組織、力學性能等方面是否合格。這個就需要用專門儀器來進行高倍放大檢查的檢驗流程，其目的主要是檢查鍛件是否存在如內部斷裂、疏松縮孔、樹枝狀結晶和白點、流線紊亂、穿流等缺陷，還包括鍛件的抗拉強度、延展性、硬度、可塑性、耐熱溫度等方面的檢驗。

　　The quality inspection of forgings mainly consists of two methods: external observation method and internal testing method. External observation, as the name suggests, is by observing the appearance of the product, such as the shape of the forging, geometric size, surface conditions, such as observation, measurement, to see whether it meets the standards, whether there are external defects, etc.. Specifically, is to check whether the forging dimensions conform to the pattern, the surface whether there are defects such as cracks, forging the surface folds, foaming, crushing, pits, impurities, scratches and other physical defects. The internal test method mainly tests whether the chemical composition analysis, macroscopic and microscopic structure and mechanical properties of the forgings are qualified. This requires the use of specialized equipment for high magnification inspection process, its main purpose is to check whether there are internal faults, such as forging loose shrinkage, dendrite and flaking, streamline disorder, cross flow and other defects, including forging test of tensile strength, ductility, hardness, plasticity and temperature resistance etc..

　　一般來說對環形鍛件的質量檢驗都會包含以上兩個方面，外部觀察法廠家可自行觀察測定，內部測試法比較復雜，也需專業儀器，廠家可委托第三方相關單位進行測試。通過這兩方面的把關，一定能獲得符合生產要求的高質量鍛件。

　　General quality inspection of ring forgings will include the above two aspects, external observation can be observed by manufacturers, the internal test method is more complex, also need professional equipment, manufacturers can entrust the third party to the relevant unit test. Through these two aspects of checks, we will be able to obtain high-quality forgings in line with the requirements of production.