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When the open die forgings material needs to pay attention to the details

Edit: Jingjiang Jinlun Machine Manufacturing Co.,Ltd    Date: Jul 12, 2017

When the Open Die Forgings material needs to pay attention to the details
In general, different forging methods have different treatments to the longest hot forging process. What is the need to pay attention to the selection of materials for the production of Open Die Forgingss? Let's see! Materials are mainly carbon steel and alloy steel, followed by aluminum, magnesium, copper, titanium and its alloy composition.
First of all, we need to understand that the original state of the material has a bar, ingot, metal powder and liquid metal. The deformation of the ratio of the cross-sectional area before and after the cross-sectional area in the metal is called the forging ratio. The right choice forging ratio, reasonable heating temperature and holding time, reasonable forging temperature and final forging temperature, reasonable deformation, deformation rate has greatly improved product quality and reduce costs.
For the general small and medium Open Die Forgingss, round or square bar is blank. Bar organization and mechanical properties, good, accurate shape and size of the particles evenly, the surface quality is good, easy to organize mass production. As long as the reasonable control of heating temperature and deformation conditions, do not need large forging deformation can be forging out of the excellent performance of die forging.
The ingot is only used for large Open Die Forgings. The ingot is the center of the as-cast, larger columnar crystals and osteoporosis. It must be deformed by large plastic, the columnar crystals of the mixer are broken by fine particles and will be compacted in order to obtain excellent metal structure and mechanical properties. Suppression and powder metallurgy block the combustion, the hot state can be made by powder without forging after forging. Close to the general Open Die Forgings die forging powder density, with good mechanical properties, high precision, can reduce the follow-up processing. The powder forged internal tissue is homogeneous and has no segregation and can be used to make the pinion and other artifacts.
To modern times, people for the use of the product more demanding, the corresponding production also put forward forging products put forward higher requirements. And the type of forging forging quality problems in the form of more and more, some types of forging defects will seriously reduce the performance of Open Die Forgings, threatening the use of safety, reliability, shorten the service life, the consequences of the existence of serious defects. For the quality inspection of the forging forgings also made a higher requirement that the mold can not be made with the previous defects, in particular, can not let those who seriously affect the Open Die Forgings the defective performance. To do this, will be in forging quality inspection and control, in addition to taking full advantage of the existing detection methods and devices, also reflects the contemporary level to take a faster and more accurate detection device and method to make the Open Die Forgings quality evaluation Nature, forging judgment defects, causes and formation mechanisms for more accurate analysis, more in line with the actual line, judgments to ensure that no defective Open Die Forgingss, and can take appropriate measures to improve and improve the quality of Open Die Forgings.
As mentioned earlier, the quality of Open Die Forgings inspection is divided into appearance quality and internal quality inspection. Appearance quality inspection is generally non-destructive inspection, generally with the naked eye or low power magnifying glass inspection, also uses the necessary non-destructive testing method. And internal quality checks, as it is required to check the contents of some destructive checks that must be used, which are usually reported by sandwich tests such as macroscopic and fracture tests, microscopic tissue inspection, chemical composition analysis and mechanical performance testing The , And others can also use non-destructive testing methods, and in order to more accurately assess the quality of open-forging parts, destructive testing methods should be used for non-destructive testing methods are used for combination. In order to analyze the quality problems of Open Die Forgings from the deep, the mechanism of research work by transmission or scanning electron microscopy, electron probe and so on.
In general, the internal quality inspection method of Open Die Forgings can be attributed to: mechanical performance test, metallographic examination, macroscopic inspection, chemical composition analysis and nondestructive testing.

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