How to solve the problems of dark cracking and cracking of automobile stamping parts?
Automobile is a heavy industry, so its requirements on hardness must be met. Otherwise, the whole car will not be able to meet its quality requirements. After reminding the automobile sheet metal parts manufacturer, there is one more point that the stamping parts must meet its requirements in The requirements for wear resistance are often closely related to its service life, so this is also a very important requirement.
If it does not achieve accuracy, one is that the automotive stamping parts cannot be used. Even if it can be used, it cannot achieve its own performance, and there is still a great danger. Next, this stamping part has to achieve very good performance. Hardness, of course, has a lot to do with its production materials.
Needless to say, the cracking of automobile stamping parts is obvious. It is obvious that the necking is difficult to detect. First, understand the mechanism of material deformation. The process of material stretching and plastic deformation is mainly from the uniform elongation stage to the local elongation stage. The cracking stage consists of these three stages. The uniform elongation stage is the ideal stage. At the same time, the thickness direction becomes uniform and thin. The surface quality is good, smooth and the original roughness of the material has no obvious change, which is almost invisible to the naked eye. In the local elongation stage, the material is basically close to the elongation limit, and the elongation is mainly achieved by local severe and rapid deformation.
In this way, the length direction is elongated and the thickness direction is sharply reduced. Due to insufficient material flow, the surface is rough and the graininess is obvious. It looks like orange peel to the naked eye. If the thickness of the material increases, the surface will appear a gray-white color. These two are relatively obvious characteristics. Of course, the relationship between it and the thickness of the material needs to be summarized in actual experience. open, and then measure how thin it is. Focus on and manage areas prone to cracking.
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