Hot-Dipping/Immersion Processes TRIZ Cases

Controlled annealing uses carbon chemical potential to drive uphill diffusion, keeping steel composite edges ductile and cores hard.

A graphene-reinforced polymer coating over plated steel tubing improves corrosion, abrasion, and stone-impact resistance without heavy tube designs.

Fitted projections and holes lock gas wiping nozzle lips in position, stabilizing gas flow and coating weight on fast-moving steel strip.

A three-part connection uses thermal expansion to press-fit inert rolls in molten metal, enabling torque transfer without breakage.

Fine TiOx, TiB2, and Al2O3 precipitates help press hardened aluminized steel keep martensitic strength while resisting delayed fracture.

Controlled alloying and cooling create martensitic press-hardened steel that balances strength, ductility, weldability, and corrosion resistance.

Local preheating and molten zinc spraying coat nail heads evenly, improving corrosion resistance while avoiding strength loss and batch galvanizing waste.

A tin layer on galvanized steel controls zinc oxide during austenitizing and press hardening, avoiding cleaning while preserving weldability.

Controlled oxidizing heat treatment helps a Ni-Cr barrier coating block hydrogen diffusion and improve delayed cracking resistance in press-hardened steel.

Mn enrichment at phase interfaces and 480-600°C isothermal holding help galvanized steel keep 980 MPa strength, formability, and low-temperature toughness.

Aluminum-silicon alloyed steel forms a boundary layer during spot welding that blocks molten zinc penetration and preserves joint ductility.

Laser-textured metal sheets use area-specific dimple patterns to balance forming, paint adhesion, friction, and surface appearance.

Rolled surface depressions and a load-responsive coating store and release lubricant during forming, cutting friction, wear, and lubricant use.

Pre-heating surface cleaning on zinc-coated steel prevents point defects from zinc vaporization and scale, improving hot-pressed surface finish.

Filler-wire laser joining limits Al-Si segregation in aluminum-coated blanks, preserving martensite, joint hardness, and crash energy absorption.

Furnace settings tied to rolling degree and sheet thickness keep diffusible hydrogen below cracking risk in coated hot-formed steel parts.

Quenching below Ms and partitioning at 350-500°C stabilize retained austenite, helping steel sheets keep strength, elongation, hole expansion, and weldability.

Reduced aluminum precoating and multi-stage heating improve bend toughness, cut die wear, and maintain corrosion resistance in hot stamped steel.

Controlled coiling, pickling, and Al hot-dip coating improve hot-stamping adhesion while keeping coating thickness and weldability in range.

Low-carbon TRIP steel balances retained austenite, ferrite, and martensite to reach 980 MPa strength with formability and spot weldability.

Nickel diffusion during annealing limits liquid metal embrittlement cracks in galvannealed steel sheets and improves spot weldability.

Controlled alloy composition, heat treatment, and cooling limit hydrogen charging in hot stamping while preserving 1.5 GPa-class strength.

Controlled annealing and dew point tuning limit zinc diffusion and LME cracks in 900 MPa zinc-coated steel spot welds.

An aluminum-silicon coating with alkali additives limits oxidation in hot forming, cuts tool wear, and avoids zinc-related roller fouling.

Rolled indentations and a load-responsive coating store and release lubricant where forming friction is highest, cutting lubricant use.

Mn-rich multiphase steel with controlled pre-coating improves press-hardening strength, crash ductility, corrosion resistance, and weld quality.

A ferrite surface layer plus pickling and re-annealing limits Mn-rich oxides, improving zinc coating adhesion and corrosion resistance.

Controlled Al-Si-Fe coating composition and furnace treatment keep diffusible hydrogen low, helping hot-formed steel resist cracking.

Controlling Γ-phase precipitation and Al-Mg oxide content improves paint adhesion and post-paint corrosion resistance in hot-pressed steel.

An Al-Fe coating alloyed with Cu and Mo, Ni, Mn, or Cr helps hot-stamped steel resist hydrogen embrittlement and corrosion in harsh environments.

A tailored multiphase steel composition balances 950 MPa-class strength with formability for lighter, crashworthy automotive parts.

A balanced ferrite-bainite-retained austenite microstructure improves elongation and hole expansion without heavy alloying or harder production.

Controlled Al-Fe coating diffusion and martensitic steel composition limit hydrogen-driven delayed fracture while preserving high tensile strength.

Controlled retained austenite and bainite fractions let galvanized steel keep high yield strength while preserving elongation and stretch flange formability.

A ferrite-enriched surface layer and multiphase microstructure help cold-rolled steel sheet balance strength, hole expansion, and LME resistance.

Quenching and partitioning tune ferrite, retained austenite, and martensite to raise steel sheet strength without losing elongation or hole expansion.

Controlled quenching and partitioning create a coated steel sheet that keeps high strength and formability while reducing spot weld cracks.

Controlled martensite, bainite, and residual austenite help steel members reach 1400 MPa strength while preserving formability and low-temperature toughness.

Zinc-rich valleys and magnesium-rich peaks on deterministic sheet steel improve lubricant wetting, forming consistency, and lower lubricant use.

Controlled C-Si composition and quench-partition processing deliver high-strength coated steel with ductility and reduced spot weld cracking.

A multiphase Al-Zn-Mg coating with Fe-Al and Mg-Zn phases helps hot stamped steel resist LME, hydrogen penetration, and corrosion.

Controlled annealing, quenching, and partitioning create a coated steel sheet that balances 1100 MPa strength with ductility and hole expansion.

A zinc-nickel coating forms high-melting intermetallics that block liquid zinc penetration and reduce LME cracking during welding and hot forming.

Controlled Ni, Al, and Fe regions in the plating layer suppress corrosion and hydrogen embrittlement during hot stamping.

Alloying AHSS to stabilize austenite in the heat affected zone helps spot welds retain hardness and resist zinc-induced embrittlement.

A Ni barrier over Al-Si plating suppresses hydrogen intrusion during hot stamping while preserving adhesion in high-dew point conditions.