Hardfacing Material
Hardfacing material for mining & construction purpose, tungsten Carbide use for ere low stress sliding abrasion. While tungsten carbide is an excellent abrasion resistant material, it should never be used for high temperature wearapplicationsbecause tungsten carbide oxidizes at temperatures above 900F°(482C°), resulting in a drastic loss in wear resistance. If corrosion is a factor, choose a tungsten carbide overlay with a nickel or stainless strip instead of carbon steel. Further more, during the welding process particles of tungsten carbide, since they are heavier than the mild steel matrix, tend to sink to the bottom of the weld deposit so that the top portion of the deposit wears away more rapidly than the bottom. In addition, some of the tungsten carbide will be dissolved during welding.
Carbide containing alloys are designed for more ere. abrasion resistance and offer greatly improved performance over all other alloys for low and high stress abrasion.
The higher the hardness the better the abrasion resistance, but with some sacrifice in impact resistance. All carbide surfacing alloys develop transverse stress relieving, Cross-checks; the higher the carbon, higher hardness, types develop these cracks more readily and closer, together than lower carbon, lower hardness types.