环形锻件在汽车制造、铁路运输、建筑、铸造加工、金属冲印等行业都有非常广泛的运用，它的产品质量是厂家后续生产的前期保证，如果锻件质量不好，会对生产产品的质量造成很大的影响甚至危害工人人身安全。因此。厂家要选择质量可靠的锻件作为原材料，这样才能保证年生产顺利进行。下面我们就环形锻件的质量鉴别提供一些方法。

　　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.

　　对锻件质量的检验主要有外部观察法和内部测试法两种。外部观察法顾名思义就是通过观察产品外观如锻件的形状、几何尺寸、表面状况等进行观察测量，看看其是否符合标准，是否有外部缺陷等。具体来说，就是检查锻件外型尺寸是否符合图样的规定，表面是否有缺陷，如锻件表面的裂纹、褶皱、起泡、压伤、坑洞、杂质、划伤等物理缺陷。内部测试法检验的主要是锻件的化学成分分析、宏观和微观组织、力学性能等方面是否合格。这个就需要用专门仪器来进行高倍放大检查的检验流程，其目的主要是检查锻件是否存在如内部断裂、疏松缩孔、树枝状结晶和白点、流线紊乱、穿流等缺陷，还包括锻件的抗拉强度、延展性、硬度、可塑性、耐热温度等方面的检验。

　　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..

　　一般来说对环形锻件的质量检验都会包含以上两个方面，外部观察法厂家可自行观察测定，内部测试法比较复杂，也需专业仪器，厂家可委托第三方相关单位进行测试。通过这两方面的把关，一定能获得符合生产要求的高质量锻件。

　　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.