SPCC cross-section: when forming failures start from the microstructure
Cracking, delamination, or brittle fracture during stamping and bending of SPCC cold-rolled steel may not always be explained by dimensions or conventional tensile properties.
Cross-sectional metallography can reveal what routine inspection may miss — such as coarse grains, excessive banding, carbide aggregation, or rolling-induced microcracks that can reduce formability and contribute to unexpected failures.
For this SPCC sample, we used the following preparation route:
• TJ2226 cold mounting resin
• P400 MET-SP SiC abrasive paper with water
• POS fine grinding disc + 9 μm PD-WT polycrystalline diamond suspension
• SC-JP white silk polishing cloth + 3 μm PD-WT polycrystalline diamond suspension
• ZN-ZP black polyurethane polishing cloth + 0.05 μm SO-A539 polishing suspension
Grinding and polishing were performed using the Alpha-610 automatic grinder and polisher.
A well-prepared cross-section provides a much clearer basis for evaluating microstructure, tracing forming failures, and verifying process quality.
