Product Details

The hammer head of the crusher should be accurately defined as the hammer head of the hammer crusher. The hammer head is one of the core components of the hammer crusher. It is arranged on the hammer shaft of the crusher rotor. The hammer head hits directly when the crusher is running at high speed. The material is finally broken into a suitable material particle size.

According to the manufacturing process, the crusher hammers on the market can be divided into two types: casting and forging, but their wear resistance is different. Due to the crushed materials, the head needs good wear resistance and the handle needs sufficient toughness. Usually alloy steel, high manganese steel, cast steel and high chromium cast iron bimetallic composites are used for forging or casting. The corresponding heat treatment process is more economical. According to the material, the hammers of the crusher can be divided into types: high manganese steel hammers, bimetal hammers, high chromium hammers, composite hammers, large gold teeth hammers, and medium chromium alloy hammers. The main factor is the content of silicon dioxide. The technology in modern industry shows that the use of cemented carbide hammers performs well in wear resistance.

Hammer material

The greater the hardness of the hammer, the greater the wear resistance. To improve the wear resistance of the hammer, it is necessary to increase its hardness, but as the hardness increases, the impact toughness of the hammer will decrease. Therefore, how to balance the appropriate hardness and good impact toughness of the hammer is to improve the hammer. The key to abrasion resistance. Commonly used materials for hammers are: high manganese steel, high chromium cast iron, and low carbon alloy steel. High manganese steel has good toughness, good manufacturability, and low price. Its main feature is that under the action of greater impact or contact stress, the surface layer will quickly produce work hardening, and its work hardening index is 5-7 times higher than other materials. The wear resistance is greatly improved. However, if the impact force of the towel is insufficient or the contact stress is small, the surface cannot be quickly hardened, and the wear resistance of the high manganese steel cannot be exerted. High chromium cast iron is a wear-resistant material with excellent abrasion resistance, but its toughness is low and brittle fracture is prone to occur. In order to ensure the safe operation of high chromium cast iron hammers, people have developed composite hammers, that is, high chromium cast iron is cast in high manganese steel or low alloy steel hammer head, or the working part of the hammer is made of high chromium cast iron, and the hammer handle part is used. Carbon steel combines the two so that the hammer head has high hardness, and the hammer handle has high toughness. The advantages of the two materials are used to overcome the shortcomings of a single material and meet the performance requirements of the hammer. However, the manufacturing process is complicated and the process requirements are stricter. Low-carbon alloy steel is mainly alloy structural steel containing chromium, molybdenum and other elements. It has high hardness and good toughness. Its matrix structure has martensite, bainite or bainite + martensite composite structure. The hardness of the hammer head is about HRC 45, and the impact toughness is d. ≥15 J/resistant. Under the same working conditions, its service life is at least 1 times longer than that of high manganese steel hammers. But the quenching and tempering heat treatment of the hammer head is the key. After the quenching and tempering heat treatment, not only the overall tensile strength is required to reach 850 MPa or more, but also considerable plasticity and toughness are required.

Our company has many years of experience in the production and sales of composite hammers for crushers. Special composite casting technology is used in the manufacturing. The striking parts of the hammers are made of high-chromium cast iron wear-resistant materials, and the hammer handles are made of wear-resistant alloy steel with good impact resistance and toughness. The material, through the split-inlaid composite pouring method, ensures the wear resistance and impact toughness mechanical properties of the high chromium composite hammer head. Compared with the manganese steel hammer head, the life of the hammer head produced by our company can be increased. 3-5 times. 
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