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Home / News / Knowledge / SPCC cross-section: when forming failures start from the microstructure

Home / News / Knowledge / SPCC cross-section: when forming failures start from the microstructure

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.

SPCC cross-section microstructure detail

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.

SPCC full thickness cross-section view

Sample Preparation Procedure

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.

SPCC polished and etched grain structure

Conclusion and Quality Control

A well-prepared cross-section provides a much clearer basis for evaluating microstructure, tracing forming failures, and verifying process quality.

#Metallography #SPCC #FailureAnalysis #QualityControl #SamplePreparation #Steel

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