The Choices Of The Materials And The Heat Treatment Ways And Measures About The Impact Crusher Hammer

Impact crusher hammer is one of the main part of the impact crusher which is easy to be worn. Every year we consume a great deal of metal material. Currently, austenite antifriction steel was used in a great part of the hammer domestic, but because it is difficult to form the valid hardening layer when it works, it's wear resistant is not good, and the service life is very short. This is not benefit for the broken up process of the rocks and lower production efficiency. Meanwhile, it increases the cost of production greatly.In order to resolve this engineering problem, this article carries on the test and the experiment of the hardness and the optical microstructures, the transmission electron microscope (TEM) and the scanning electron microscope (SEM), makes a detail analysis of the microstructure ,the performance and the wear mode and so on to the used austenite antifriction steel hammer, and then finds out the reason why the hammer has a poor wear resistant and expired in early days . And after putting forward on these conclusions , the article raises several suggestions to improve this type hammer's service life .In the above on the basis of the research work ,this article chooses 42CrMo,60Si2Mn and Cr12MoV to be the material of the new hammer, and establishes their heat treatment ways and measures , makes these new hammers have the good hardness and toughness. Compared with the austenite antifriction steel hammer, the production experiment shows that the wear resistance of the new hammer increases more than two times. Through the tests and the experiments of hardness , the optical microstructures and the scanning electron microscope(SEM) ,we analyze the reason that the wear resistant increases from the microstructure ,the performance and the wear mode and so on, and compare the economic benefit of these hammers, then provide a theoretical basis that we can select the material and the heat treatment ways and measures of the impact crusher hammer under the similar working conditions.