Hardcarb 5012
Hardcarb 5012 is close to Hardcarb 5006 in composition with the most significant difference between the alloys being one of carbide volume, hence high hardness and resistance to abrasion. Hardcarb 5012 is a cobalt-base alloy having high heat and corrosion resistance with excellent wear and abrasion resistance. Examples include industrial knives for cutting carpets, plastics, paper and synthetic fibers; and saw tips in the timber industry.
Weld deposit characteristics:
The deposit is a cobalt base alloy of austenitic-ledeburitic structure with embedded CrW carbides. The weld metal is highly resistant to metal-metal wear, abrasion, cavitation, corrosion and heat up to 700°C. Excellent gliding characteristics, good to polish, non-magnetic.
Machinable with difficulty using tungsten carbide tools or by grinding.
Recommended uses and applications
Typical applications:
» saw teeth, saw bars
» valve seat
» cutting edges of long knifes
» extrusion screws in the wood, paper and plastic industry
» extrusion dies
» hot working tools without thermal shock
» shredding tools
Additional info
Anti-wear suitability
| Metal-to-Metal friction Metal surfaces in relative motion forced into contact with or without lubricant. Degradation by the formation of micro-welds between the contacting surfaces. | Suitable |
| High pressure abrasion Wear by relative movement under pressure of mineral particles of suitable hardness, shape and texture to remove material from the metal surface, leaving superficial deformation. | - |
| Cavitation Tearing out of grains from the metal surface by the formation and implosion of bubbles in a liquid in rapid motion. | - |
| Mechanical fatigue Fatigue and formation of cracks in surface regions due to tribological stress cycles that result in the separation of material. | - |
| Thermal fatigue Cyclic exposure to high temperatures leading to permanent deformation by alternate expansion and contraction. Alteration of the structure and properties of the material. | - |
| Hot oxidation Creation of a poorly adhering oxide layer that reforms constantly. Degradation by loss of material thickness. | Highly suitable |
Workability
| Work hardening Work hardening is the process of making a metal harder and stronger through plastic deformation. When a metal is plastically deformed, dislocations move and additional dislocations are generated. | |
| Edge retention Suitability for creating sharp edges and retaining them during operation. | |
| Machining Machinability is the ease with which a metal can be cut (machined) permitting the removal of the material with a satisfactory finish at low cost. | Suitable using carbide tools. |
