In the port, the parts such as grabs, hoppers and chutes in bulk handling systems such as iron ore and coal are subject to severe wear and wear-resisting composite steel plates in the wearable parts, in order to prolong the service life of these wear parts. It is important to reduce the downtime of the loading and unloading machinery.
Since the alloy powder is added to the molten pool during the welding process, the heat of the arc is absorbed. The cooling rate of the molten pool is accelerated, the crystallization time of the liquid metal is shortened, the grain growth is limited, and the microstructure of the weld layer is fine. Compared with casting, surfacing and welding can increase the wear resistance by multiple times. The alloy composition of the surfacing layer is generally 3%-5% carbon content and 20%-40% chromium content.
A great advantage of using a surfacing and wear-resistant composite steel plate to make a lining plate is that the wear- resistant material is a bimetallic material, the surface is a high-alloy wear-resistant layer, and the master plate is a carbon-coated steel plate. The carbon steel plate has good plasticity and toughness, can withstand a large impact, and can also be bent. In order to adapt to different working conditions, the coil plate can be processed. Therefore, the surfacing wear plate is both wear resistant and tough. In addition, the surfacing welding wear plate can also be cut into workpieces of different sizes and complicated shapes by a plasma cutting machine, which is quite convenient to use.
