How combined Stretch‑Leveler removes residual‑stress‑related flatness defects for all‑hard high‑strength steel, stainless steel and tinplate. Insights referenced from AHSS‑Insights industry resource.
High‑strength cold‑rolled thin strip is widely used for automotive components, food‑grade tinplate and precision stainless‑steel parts. Yet manufacturers frequently struggle with flatness issues after rolling. Residual internal stress causes edge waves, crossbow and unexpected warping during subsequent stamping operations, bringing higher scrap rates and production losses.
As covered by AHSS Insights technical resource, high‑strength cold‑rolled strip retains considerable residual stress after rolling, bringing typical flatness defects such as edge waves and crossbow. Conventional leveling hardware often lacks sufficient rigidity and deformation capacity for high‑yield‑strength material. Single‑group dual‑bending leveling units can hardly deliver uniform plastic elongation across the full strip width when facing hard‑temper grades.
Our combined Stretch‑Leveler addresses this real‑world manufacturing bottleneck. Built‑in multiple bending‑levelling assemblies work in tandem to create uniform plastic elongation over the whole strip width.
Thanks to this modular multi‑unit layout, the combined Stretch‑Leveler can reliably process hard‑temper grades with yield strength up to 1200 MPa. Working within its defined operating envelope: maximum strip width ≤2000 mm, thickness ≤2 mm and line speed up to 600 m/min, this Stretch‑Leveler fits production of cold‑rolled all‑hard high‑strength steel, stainless steel and tinplate. Plant operators adopting this Stretch‑Leveler are able to minimize post‑process distortion and cut scrap rates significantly.
Different from ordinary dual‑bending dual‑levelling equipment which depends on limited deformation cycles, the modular structure of our Stretch‑Leveler repeats alternating bending deformation step‑by‑step. Gradual stress release helps stabilise strip geometry before surface treatment or stamping processes. For production lines handling mixed‑grade thin coils, this configuration brings stable levelling performance without frequent mechanical adjustment.
Further Technical Reference
This article refers to publicly‑available metallurgical content from AHSS Insights, which describes practical leveling challenges for high‑strength strip material. Click below to view the original industry resource.
‑ AHSS Insights. Coil‑Processing: Straightening and Leveling[R]. WorldAutoSteel Industry Technical Article.
https://ahssinsights.org/forming/coil‑processing/coil‑processing‑straightening‑and‑leveling/
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