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Subject :The quality of the hammer material is a key factor in the life of the hammer crusher
The most critical part of the hammer crusher is the hammer head. The hammer head is also the most vulnerable to wear and tear. The choice of a good hammer is very important for the long-term use of the hammer crusher. The stellar SBM crusher expert Study with you the hammer material of the hammer crusher.
(1) Manganese steel hammer: At present, the hammers of domestic crushers are mostly made of high-manganese steel, which has insufficient wear resistance and a very short service life. The hammerhead for broken limestone can generally be used for 60-90d, and under certain special conditions, it can be used for less than 7d. At the same time, due to the impact force of the hammer head in the work is not large, the work hardening effect of the high manganese steel hammer head is not significant, and its anti-scour wear ability is poor.
Since Cr can strengthen the austenite and increase the hardness, strength and wear resistance of the steel, adding Cr element to the high manganese steel can greatly strengthen the hammer. When crushing iron ore, the service life of the hammer is 50% higher than that of ordinary high manganese steel.
(2) Hammer type crusher composite hammer: The traditional high manganese steel hammer has poor wear resistance, short service life and large consumption. To this end, we designed the hammer head to be made separately from the hammer handle and the hammer end. The hammer handle part is made of high manganese steel or carbon steel, which makes it have sufficient toughness, and the hammer part is made of high chromium cast iron.
High-chromium cast iron is a material with excellent wear resistance, so that the hammer end will have sufficient wear resistance. At the same time, because the high-chromium cast iron has low toughness and is prone to brittle fracture, the hammer handle selects high toughness and high manganese. Steel or carbon steel material overcomes the shortcomings of a single material. Practice has shown that the service life of broken cement clinker in the cement industry is more than 2 times higher than that of high manganese steel hammer.
In addition, it can also be used to cast a white hammer hammer. The test proves that when the albite with a Mohs hardness of 6.5 is broken, the service life can be stably reached three times that of the high manganese steel hammer. From the above analysis, The above two composite hammers meet the performance requirements.
(3) hammer crusher low-alloy steel hammer: The composite hammer has a high service life, but its casting and heat treatment process is complicated. To this end, in recent years, a variety of low-alloy steel hammers have been developed, and 40CrMnSiMoRe low-alloy steel hammers have been promoted.
The 40CrMnSiMoRe steel alloy has low content of elements, low production cost and simple process, and the required mechanical strength can be obtained by suitable heat treatment. After analyzing the operation of the hammer and the experiment on the crusher, it is confirmed that the material meets the performance indexes of the hammer and can be used as a good hammer material. |
