Hardcarb 700
High efficiency chromium carbide based surfacing alloy suitable for applications subject to strong abrasive wear and moderate impact at elevated temperatures. The weld deposit contains a high proportion of hard primary chromium carbides in a tough austenitic matrix with additions of Mo and Ni for higher temperature suitability.
Weld deposit characteristics:
The weld deposit contains a high proportion of hard primary chromium carbides and eutectic carbides in a tough austenitic matrix. Additions of Mo and Ni increase the temperature resistance of the alloy up to 550°C.
The material cannot be flame cut, offers good resistance to scaling and cannot be machined. It can be ground or finished with great difficulty using special carbide or diamond tools.
Recommended uses and applications
» compressing and conveying screws
» parts of sifters and cyclones
» agitator parts
» fan blades and casings
» dust ducts
» coke pushers
» sinter and slag crushers
» grate bars
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. | - |
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. |
