As the core component of the walking system of construction machinery, the wear resistance, corrosion resistance and temperature resistance of the track plate directly affect the service life and working efficiency of the equipment under complex working conditions. From the material technology point of view, the track plate is mainly divided into two categories of steel and rubber. The steel track plate is mostly made of 25MnB alloy steel 1, which is optimized by casting process such as cold iron layout and sequential solidification, so that its hardness reaches HB364-444, and its impact resistance is increased by more than 40%, especially for heavy-duty scenarios such as large excavators and bulldozers. The rubber track plate is made of polymer polyethylene or synthetic rubber as the main material, the surface is embedded with steel core or fiber cloth to strengthen the support, the wear rate is only 1/738 of the steel, and through the vulcanization process and oil resistance, acid and alkali resistance formula, it can operate stably in the environment of -25℃ to 80℃, avoiding the metal material easy rust, low temperature embrittle and other problems.38 In extreme environments (such as deserts and saline-alkali lands), some products also use galvanized or polyurethane coating technology to further enhance corrosion resistance.
In terms of structural design, the track plate adopts a split modular design (such as the Vogler paver model) to achieve rapid replacement of worn parts, reducing costs and increasing efficiency. The three-bar or non-slip bar design enhances the specific ground pressure and grip, ADAPTS to soft and slippery terrain, and reduces wear caused by gravel penetration. In addition, the high-strength alloy steel track plate can withstand more than 20MPa pressure and maintain stable output under high temperature and high vibration conditions by optimizing the heat dissipation system and sealing structure (such as floating oil seal).
The collaborative improvement of wear resistance and temperature resistance is the key to the breakthrough of track plate technology. For example, the rubber track plate through the embedded steel core and surface anti-slip design, not only to reduce the scratch damage to the ground, but also to avoid softening deformation when working at 80℃ high temperature asphalt pavement. The steel track plate relies on the optimization of the alloying element ratio, and can still maintain high strength in the extremely cold mining area (-40℃) to avoid low temperature brittleness. Both types of products are ISO certified, and the life span is more than 2 times longer than the traditional model.
At present, the market has formed diversified corrosion resistant solutions. The rubber track plate has become the first choice for urban construction due to its acid and alkali resistance and oil resistance. Steel track plate through coating or polyurethane coating, suitable for saline-alkali land, coastal ports and other corrosive environment 38. In terms of supply chain, it covers more than 1,000 models such as EX45 and SC10000, supports customized production and batch procurement, meets the needs of different scenarios, and promotes the continuous upgrading of construction machinery to the direction of efficiency and durability.