Products Description
process:Waterjet Cutting
surface:Clean and smooth, no peeling, porosity, cracks, etc
Detection method
(1) Geometry and size
General forging dimensions with a steel ruler, calipers, samples and other gauges for testing; complex shape of the die forging parts can be scribing method for accurate detection.
(2) Surface quality
If there are cracks, pressure injuries, folding defects on the surface of the forging, generally with the naked eye can be found. Sometimes cracks are very small, the folding of the depth of the unknown, can be observed after the shovel; if necessary, the inspection can be used for flaw detection method.
(3) Internal organisation
Whether the forging internal cracks, inclusions, loose and other defects, available to the naked eye or with 10-30 times magnification to check the macro-organisation on the forging section. Commonly used in the production of the method is the acid etching test, that is, in the forging parts need to check the cut sample, with acid etching can clearly show the section on the macro-organisation of defects in the situation, such as forging streamline distribution, cracks and inclusions, and so on.
(4)Metallographic examination
With the help of metallurgical microscope to observe the forging fracture organisation state of the test method, you can check the carbide distribution, grain size and decarburisation depth and other items.
(5) Mechanical properties
Mechanical properties test items are mainly hardness, tensile strength and impact toughness. Sometimes according to part design requirements, but also for cold bending test, fatigue test.
The above quality inspection project, sometimes according to the design requirements and production of the actual situation were used, sometimes piece by piece inspection, sometimes by each batch of forging sampling. Through the quality inspection, you can assess whether the forging is qualified. For defective forgings, should analyse the causes and put forward measures to prevent defects.
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