A kind of process of metal mold centrifugal casting composite high and low carbon manganese steel hammer head

Abstract

The invention discloses a metal mold centrifuging casting process for a composite high and low carbon manganese steel hammer. The metal mold centrifuging casting process for the composite high and low carbon manganese steel hammer is characterized in that the composite high and low carbon manganese steel hammer head comprises two portions of a hammer handle and an abrasion area hammer head, the hammer handle and the hammer head are made of two carbon manganese steel materials which are different in composition, a metal mold is manufactured by using a bottom pouring type metal type hammer mold, then the metal mold is installed on a vertical centrifugal machine, two intermediate frequency furnaces are used to simultaneously smelt the two carbon manganese steels which are different in composition, steel liquids of the two carbon manganese steels are poured on the metal mold in sequence, and composite casting of the two carbon manganese steels which are different in composition is completed under the function of centrifugal force. According to the metal mold centrifuging casting process for the composite high and low carbon manganese steel hammer, defects such as shrinkage porosity, air holes and slag inclusions are effectively overcome by refining crystalline grains of the steel liquids under the shock chilling function of the metal mold, and greatly improving feeding capacity of the steel liquids under the function of the centrifugal force. According to the hammer manufactured by using the two high manganese steels which are different in composition through the composite casting, an abrasion area of the hammer is made of high carbon and high manganese steel which is high in abrasive resistance, the hammer handle is made of low carton and high manganese steel which is good in toughness, and therefore the advantages of each material are fully exploited, and simultaneously the disadvantages of each material are avoided, and furthermore use life of the hammer is greatly prolonged.

Description

Technical field [0001] The invention relates to the field of hammers for large-scale crushers in the mining and cement industries, in particular to a process for a metal type centrifugal casting composite high and low carbon manganese steel hammer. Background technique [0002] Under the action of large impact load, the surface of high-manganese steel rapidly produces work hardening, and high-density dislocations and deformation twins are formed, resulting in a wear-resistant surface layer, while the austenite in the inner layer is still well maintained. Of resilience. When the external impact is greater, the surface wear resistance is higher. This characteristic of high manganese steel has made it widely used in hammers for large-scale crushers in metallurgy, mining, and cement industries for a long time. With the extensive use of high manganese steel hammers, it has been found that its wear resistance is affected by various factors. One of the first is the influence of carbo...

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Problems solved by technology

Only limited to the limitations of sand casting technology, these methods have little effect and cannot fundamentally solve the above problems

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