Method for improving internal quality of high manganese steel frog and lowering production cost

Abstract

The invention discloses a method for improving the internal quality of a high manganese steel frog and lowering the production cost, and relates to the procedures of model forming, modeling and removal of risers. Innovative special-shaped risers, easy-to-cut pieces, frog structures, repairing and attaching forms and riser removal methods are put forward, and the traditional process of removing risers through a hot-cutting method, namely the method of conducting melting through burning, and high-temperature heat release of sharp gas (acetylene) is omitted, so that the energy is saved, and environmental pollution is avoided; and moreover, the situation that the high manganese steel frog has high cross-section appearance quality after being hammered, then a high stress area is formed due to local uneven heating of the hot risers to the frog rail wall, and then hot cracks are generated in the rail wall, and cause scrapping due to centralized release of heat in a finally-solidified organization part of a casting can be essentially avoided. At the same time, the repairing and attaching of the riser feeding channel is added, the modulus of the feeding channel is increased, the feeding effect of the risers is improved by more than 500%, the internal density of the high manganese steel frog is increased, the generation of shrinkage porosity defects is avoided, and the quality bottleneckof the traditional casting process is overcome. According to the method, the feeding channel can also be recycled for repeat use, so that the cost is lowered.

Description

technical field [0001] The invention relates to a process method, in particular to a method for environmental protection, effectively improving the internal quality of high manganese steel frogs and reducing production costs. Background technique [0002] High manganese steel whole casting frog is an important part of railway construction equipment. During use, it has to bear repeated alternating loads such as pressure, impact force and vibration force. Its quality directly affects the quality of railway transportation. safety and driving speed. With the speed-up and heavy-duty requirements of the line, a variety of speed-up series and heavy-duty series frogs have appeared, and the internal quality requirements of high manganese steel frogs are getting higher and higher. In order to improve the quality of high manganese steel frogs, manufacturers of high manganese steel frogs have adopted a variety of technological methods and measures for production, but the effect is not ...

AI Technical Summary

Problems solved by technology

After the casting is unpacked, the riser is removed by burning with Xiapu gas (acetylene). In order to prevent thermal cracks caused by uneven heating of the frog rail wall during eager cutting, the cutting table is set higher, resulting in more riser feeding channels that cannot be recycled. cause waste of resources

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