Thermal spray useful for mining equipment? Without a doubt! But before you select a thermal spray covering (also referred to as ‘hardfacing’), you need to understand the sort of wear first. The answers might surprise you.
Abrasive wear range from lower impact, lower stressed conditions. Here, you will have no fracture, no unexpected lack of parent material. Instead, material removal may be the total consequence of scratching, filing, a frequent loss in steel at some micro-level. Needless to say, wear rates will be more dramatic once the mined abrasives are sharpened, angular in character. Proper materials hardness, such as for example an abrasion-resistant metal or ceramic, is important.
Adhesive wear is even more of a materials or tearing separation between interacting surfaces. It starts with rubbing, and finishes with phenomena referred to as scoring, galling, or seizure. Their occurrence is connected with like components and structure typically, under an used load, without lubrication. Here, materials choices should consider features like ductility, for influence power. These “softer” alloys accessible can in fact work harden with influence or deformation. The full total result is increased strength and resistance to abrasion.
Perhaps you have identified the wear system already? Made the correct material selection? Well, it’s time to consider thermal spraying now. Hardness is the regular measurement for material selection. Again, remember that, under abrasive problems, harder material options, like tungsten carbide or ceramic coatings are usually ideal. But also for adhesive use, where impact strength could be imperative to success, softer, even more ductile choices will be the answer.
Did you know how (or where) the thermal spray coatings are applied may also decelerate rates of wear? Based on mined material form and type, the achievement of a hardface down payment will be in how it really is aligned at first glance. Parallel, perpendicular, also coating overlap and spacing often means the difference between achievement and failure. Dissimilarity in thermal growth characteristics between your parent and coating steel can be something to consider.