About Steel Tracks

- Feb 18, 2019 -

Repair of Track Plate

There are two main parts in the wear of track plate: raceway surface and track pinhole. It is very simple to repair. When the raceway is worn and sinks into a groove, the depth of the groove does not exceed 2 to 3 millimeters, it can be repaired by direct surfacing. When the wear is deeper, steel bars of different sizes can be filled in the groove according to the specific conditions, and then welded firmly from all sides. After grinding the pin hole, the original size and the central position of the original hole should be restored. For this reason, the worn pin hole can be cut, inserted into a standard size pin, then heated to about 800 C, then rolled up the edge of the ear, and a semi-circular iron plate can be welded firmly outside the cut. The repaired trackpad can last more than 100 shifts.

Substitute steel for caterpillar plate

Track boards of tracked vehicles are generally made of high manganese steel with a history of nearly 100 years. This is because the high manganese steel has a prominent feature, that is, under the impact load, impact hardening occurs, which makes it form a hard and wear-resistant surface layer, while still maintaining the toughness and plasticity of its inner structure. However, high manganese steel used as crawler plate is often damaged early due to cracks, inverted teeth and deflection, and its service life is low. In order to overcome this shortcoming, a low alloy high strength steel 30SiMnMoV (Ti) has been developed, which is based on domestic resources and easy to produce. It has been successfully used to replace high manganese steel in crawler board manufacturing.

Processing method

The crawler board processing technology of profiles is generally: the use of profiles cutting, drilling (punching), heat treatment, straightening, spraying and other processes; bulldozer crawler is single-ribbed, the general paint color is yellow; excavator board is generally three-ribbed, paint color is black. The material purchased for profiles is generally 25MnB, and the final heat treatment hardness of the material is HB364 ~ 444.