The jaw plates (Jaw Dies) is an important part of the main part of the jaw crusher station, and it is also the main vulnerable part, because the jaw plates (Jaw Dies) is a part that directly contacts the material when the jaw crusher station is working. In the process of crusher materials, the crusher teeth on the jaw plates (Jaw Dies) will be continuously squeezed, ground, and impacted by the material, and will be easily worn out under huge loads.
There are many kinds of jaw plates (Jaw Dies) on the market, and the choice of jaw plates (Jaw Dies) material is related to the length of use time and the crusher efficiency of the jaw crusher station when crusher materials of different materials. So what are their characteristics?
Jaw plate (Jaw Dies) classification
The material of the jaw plates (Jaw Dies) is generally high manganese steel alloy, high chromium cast iron, medium carbon low alloy cast steel, etc. High manganese steel alloy. High manganese steel has good impact load resistance and is the traditional material of jaw plate of jaw crusher station. High manganese steel refers to alloy steel with a manganese content of more than 10%. According to the national standard, it is divided into 5 grades. The main difference is the carbon content. The lower the carbon content, the greater the impact it can withstand, and vice versa.
Commonly used manganese steel styles and application.
High chromium cast iron
High chromium cast iron has high wear resistance, but poor toughness, so using high chromium cast iron as the jaw plate may not necessarily achieve good results. However, if high-chromium cast iron is used for inlay casting or bonding on the high-manganese steel jaw plate to form a composite jaw plate, the wear resistance is relatively high, and the service life of the jaw plate is significantly prolonged, but the manufacturing process is more complicated and difficult to manufacture Larger, the cost is also higher.
Medium carbon low alloy cast steel
Medium-carbon low-alloy cast steel can resist the fatigue spalling caused by the cutting and repeated extrusion of materials, so it shows good wear resistance. Production and operation tests show that the service life of general medium-carbon and low-alloy steel jaws can be increased by more than 3 times than that of high-manganese steel, but the toughness is average.
In summary, the choice of jaw plate material should ideally meet the requirements of high hardness and high toughness, but the toughness and hardness of the material are often not compatible with “fish” and “bear’s paw”, so in actual product design and production Manufacturers are required to carry out special designs to obtain the best combination of the two.
Design
The trajectory of the movable jaw directly determines the crushing performance of the main machine of the jaw crusher station, such as the wear of the jaw plate and the quality of the crushed product. Therefore, the design of the movement parameters of the jaw is also an important factor that determines the service life of the jaw.
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Post time: Oct-26-2021