Hardcarb 3400
Iron base hardfacing superalloy possessing excellent abrasion and erosion resistance under medium to low stress conditions. Perfectly suited for applications such as vertical mill grinding tools, high wear centrifugal fan rotors, vibro-screens, etc. The superalloy can easily provide 2x – 4x increase in lifetime over conventional complex carbide alloys in a single layer itself.
Weld deposit characteristics:
The alloy is extremely abrasion-erosion resistant, contains high volume of hard phases and exhibits a refined microstructure. The weld deposit exhibits cracks, cannot be machined and has limited shock resistance.
A high amount of superhard tungsten and niobium hard phases can be easily observed under a scanning electron microscope. These are responsible for the excellent wear performance. The alloy should not be used over manganese steel as it may lead to underbead cracking.
Recommended uses and applications
Typical applications:
» centrifugal fan impellers, casings
» vertical mill rollers, table liners
» intensive mixer beaters and scrappers
» vibratory screening deck plates
» hot dust ducts
» for single layer hardfacing in any abrasive, erosive
environment
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. | - |
| 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. | Not possible. Only grinding possible. |
