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The quality of large die forgings depends on various factors.

Release date:2019-03-14 The author: Click:


When purchasing and using die forgings, we must learn to correctly understand the main factors affecting the quality of die forgings, including raw material defects, heating specifications, die forging process and other aspects, in order to better ensure the quality of large die forgings.


Large die forgings


In the production of die forgings, such as steel ingot or steel, there are residual shrinkage holes, bubbles, looseness, inclusions and so on, which may lead to the cracking of forgings, and even scratches, scars, folds and cracks on the surface of raw materials will also bring defects to forgings. Therefore, raw materials must be inspected in the production of die forgings.

When forging large-scale die forgings and alloy steel forgings, if the heating speed is too fast and the temperature difference between inner and outer layers is large, the central part of the cracks will be caused by temperature stress and structural stress. When the heating temperature is too high and the holding time is too long, a slight overheating will result in a glossy, crystalline and intergranular fracture. Therefore, the heating specification must be controlled well. In order to refine grain, improve structure and improve mechanical properties, steel with such structure must be annealed completely to produce recrystallization.

In addition, different forging deformation modes and different forms of thermal and mechanical conditions will lead to different physical fields and the evolution process of structure and properties of the blank. Therefore, different forging processes of the same die forging will change its quality.

In addition, the quality of large die forgings is also related to the design of forgings and forging dies. The selection of machining allowance and forging tolerance should be based on actual conditions, and the design of parting surface, die forging strip web, fillet radius, linking size and flying edge structure of forgings must also conform to actual conditions. In a word, every link in the production of die forgings will have an important influence on the quality of forgings.

Die Forging Manufacturer, Truck Front Axle, Large Die Forging Selection Linyi Hongsen Rail Transit Material Co., Ltd.


This article URL:http://en.hsforge.cn/news/415.html

Key words:Largedieforgings

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