Hot-Dipping/Immersion Processes TRIZ Cases

A cold-rolled steel sheet with a specific multi-phase microstructure and controlled phase boundaries.

A high-strength cold-rolled steel sheet combines ferrite and martensite phases to achieve tensile strength of 980 MPa or more.

A combined annealing and galvanizing line integrates the galvanizing station within the annealing furnace to enable selective strip guidance.

Tempered martensite and lower bainite microstructures balance tensile strength with stretch flange formability to prevent press cracking.

A high-strength galvanized steel sheet with controlled martensite phase and chemical composition.

Tri-phase microstructure balances yield strength and elongation in vehicle components by combining ferrite ductility with martensite hardness.

Zinc oxide layer on galvanized steel sheet resists alkali dissolution during degreasing, maintaining surface uniformity and low sliding resistance.

A containment zone with specific oxidizing power minimizes coating undulations, allowing thinner paint layers without compromising appearance.

Magnetic wiping means transfers top dross from inaccessible areas to reachable zones, resolving low workability in high-speed plating operations.

Optimized alloy composition and rapid cooling create a martensite-retained austenite structure that prevents brittle fractures in complex automotive components.

Hot-dip galvanized steel sheet incorporates bismuth, tin, and antimony to stabilize microstructures during annealing.

A multi-phase steel sheet with martensite, ferrite, and retained austenite improves formability.

A galvanized steel sheet uses controlled manganese oxides in the coating layer to enhance coatability and bending workability.

Ferrite and martensite dual-phase microstructure with controlled carbon distribution achieves bake hardenability without excessive alloying elements.

Controlling cooling rates to limit residual wustite below 30% prevents scale spalling during forming and welding operations.

Segmented temperature zones create a moving solidification front that reduces impurities and surface roughness in ceramic matrix composites.

Pre-calculated valve lookup tables replace feedback loops to resolve the trade-off between control accuracy and response speed in hot dip galvanization.

Zinc plating layer with controlled Fe content and Al or Si additives maintains corrosion resistance on high-strength quenched steel.

Balanced aluminum and manganese content reduces steel density without compromising processability or weldability.

Induction heating suppresses decarburization and zinc volatilization to enhance axle beam fatigue properties.

Alloying heat treatment forms a single soft diffusion layer to prevent intermetallic compound cracking during hot press forming.

Electrolytic conversion of chromium oxide to chromic acid prevents poor adhesion and ungalvanized areas on high-strength hot-dip galvanized steel.

Measuring surface emissivity with an infrared sensor identifies alloying completion, preventing embrittlement cracking and zinc adhesion.

A composite coating of silane resins and trivalent chromium prevents blackening and fingerprint marks on zinc-plated steel without hexavalent chromium.

A coated steel sheet uses doped zinc oxide particles to provide electrical conductivity for resistance welding.

Pot magnets with pot coils stabilize metal strips, reducing energy consumption and improving maintenance access.

Silicon-containing phases in the coating block molten metal permeation, extending roll service life.

Zirconium compound foundation layer forms on tin-plated steel via cathodic electrolysis to ensure stable resin coating adhesion.

Nanocrystalline metal oxide films form through precursor deposition under argon atmosphere to enhance switching speed and durability.

Controlled hardness gradient in soft surface layers resolves the trade-off between bendability and bending load in high strength steel sheets.

Micro-alloying with Nb, V, or Ti prevents liquid zinc infiltration during press hardening, eliminating cracks and preserving corrosion resistance.

Adding aluminum to the composition stabilizes retained austenite, preventing delayed fracture from hydrogen diffusion while maintaining 980 MPa strength.

Optimized alloying parameters prevent powdering during hot forming while maintaining corrosion resistance.

A high-strength steel sheet production method using controlled cooling to form a multi-phase microstructure.

Infrared heating and detection maintain uniform target surface temperature during mobile coating to resolve film uniformity deterioration.

Multi-phase hot-dip galvanized steel sheet with controlled ferrite, bainite, martensite, and retained austenite fractions.

Molten aluminum plating on austenite steel eliminates zinc-induced liquid metal embrittlement cracks while maintaining high tensile strength and elongation.

Internal nitrides form on hot-dip galvanized silicon steel to improve zinc wettability and prevent external selective oxidation.

A three-tub circulation system separates and dissolves dross in hot-dip galvanizing baths to prevent surface defects on steel sheets.

Hot-stamped steel balances strength and toughness by controlling prior austenite grain size and shape during hot stamping to resolve formability trade-offs.

A hot-dip galvanized steel sheet with a controlled hardness gradient across its thickness.

Rolled steel forms martensite with intermetallic precipitates to achieve high elastic limit after hot stamping.

Manufacturing method controls ferrite phase fraction in galvanized steel sheets to achieve high tensile strength and ductility.

Pre-coating fibers with a higher melting temperature alloy prevents droplet formation and ensures complete wetting during high-speed primary coating.

A Zn-Al-Mg alloy coating layer uses Mg-Sn intermetallic compounds to form uniform fine spangles on steel surfaces.

Injecting oxidizing gas via modified radiant tubes controls dew point to prevent selective alloy oxidation and ensure coating quality.

Composite steel microstructure with controlled phase distribution resolves edge cracking resistance while maintaining high tensile strength.

Controlled ferrite fractions in surface layers reduce liquid metal embrittlement risks while maintaining high tensile strength.

Controlled phase fractions and grain size ratios in the steel sheet prevent member fracture during collisions while maintaining 980 MPa tensile strength.

A vertical annealing furnace uses a refiner to suction and return gas with decreased dew point.