If you are seeing a specific error message or a visual "rip" in your model, let me know: Are you using or Manual Surfacing ? What is the file format of your original scan? Is the crack appearing on a sharp edge or a smooth curve ?
The Hidden Geometry: Why QUICKSURFACE is the "Crack" for CAD Deadlocks quicksurface crack
| Cause Category | Mechanism | Typical Materials Affected | |----------------|-----------|----------------------------| | | Rapid temperature change induces high transient tensile stresses at the surface | Ceramics, glass, hardened steel, some polymers | | Stress corrosion cracking (SCC) | Combined action of tensile stress + corrosive environment; cracks grow rapidly once initiated | Stainless steels (chlorides), brass (ammonia), titanium alloys | | Hydrogen embrittlement | Diffused hydrogen recombines at inclusions or grain boundaries, causing sudden surface fissures | High-strength steels, electroplated parts | | Quench cracking | Uneven cooling during heat treatment → surface goes into tension while core is still austenitic/soft | Martensitic steels, tool steels | | Grinding burns | Localized overheating during grinding → rehardened brittle layer + residual tensile stress | Bearing steels, hardened shafts | If you are seeing a specific error message
Grinding burns produced a thin rehardened layer (untempered martensite) with residual tensile stress >300 MPa. Moisture enabled hydrogen diffusion from lubricant decomposition, triggering rapid surface cracking. The Hidden Geometry: Why QUICKSURFACE is the "Crack"