Laser repair name: High-power steel track switch frog core Basic situation: New high-power steel frogs are about 200HV. During use, the surface hardness gradually reaches 400HB due to wheel impact. Before reaching sub-hardness, the hardness is low due to wheel friction and A strong impact can easily wear about 5mm of the surface at 0-100mm at the front end of the fork center. This makes the front part of the fork center lower.

Laser repair name: High-strength steel track frog, fork center

Material: ZGMn13

Basic situation: The new high-strength steel frog is about 200HV. During use, the surface hardness gradually reaches 400HB due to wheel impact. Before reaching the sub-hardness, due to the low hardness and high wheel friction and impact, it is easy to 0-0 the front end of the fork core. The surface wear is about 5mm at 100mm. This makes the front part of the fork center lower.

Laser repair requirements:
The hardness is 400HB, and the mechanical property testing (strength, hardness, impact, metallography, and bonding) is carried out in accordance with national standards. The ideal thickness is 5MM (high manganese steel contains high carbon content, and carbides precipitate at high temperatures, which is not conducive to Metallurgical combination and formation of brittle hard structure).