Hot-Dipping/Immersion Processes TRIZ Cases

Controlled Zn-Al-Mg cut-edge coverage and repair-coat resistivity suppress cathode peeling and improve early and long-term rust resistance.

A boundary plating layer and controlled Mg/Zn distribution suppress LME cracking while improving corrosion resistance in spot-welded steel sheets.

Controlled composition and two-step heat treatment create cold-rolled steel sheet with high strength, elongation, and manufacturing compatibility.

Controlled annealing, quenching, and partitioning create a multiphase steel sheet that balances 1180 MPa strength with ductility and hole expansion.

A refined prior austenite grain skin helps martensitic steel parts keep high strength while resisting early cracks under bending loads.

Controlled coating thickness, interdiffusion, and crack density improve spot weldability while preserving paint adhesion in hot-stamped steel parts.

Controlled coating thickness and crack density help hot-stamped steel keep spot weldability while maintaining strong paint adhesion.

Controlling Wca and Ra before hot pressing preserves coating image clarity while plated layers improve corrosion resistance.

A three-layer block-size profile in steel sheet suppresses zinc-induced LME cracks during spot welding while preserving strength and hole expandability.

A Zn-rich 3-15 μm coating forms graded ZnFe alloy layers during direct hot stamping to limit zinc loss and improve cut-edge corrosion resistance.

High dew point annealing decarburizes the steel surface and stabilizes ferrite to suppress LME cracking during welding of high-strength galvanized sheet.

Laser welding with filler wire controls Al and Si in tailor-welded joints to prevent segregation and preserve martensite hardness after hot stamping.

Laser cutting creates a reduced-aluminum cut edge, then laser ablation removes coating residue to preserve weld hardness in press-hardened steel.

A thin Al-alloy coating with tuned interdiffusion-layer thickness and crack density balances spot weldability with strong paint adhesion.

Controlling Mn segregation, P concentration, and inclusion chemistry helps 980 MPa steel sheets resist delayed fracture in corrosive use.

A thin zinc topcoat forms ZnO during heat treatment, enabling ≥80% phosphate coverage and stronger paint adhesion on press-hardened steel.

Higher-emissivity overlap surfaces speed hot-stamping heating in annular steel blanks while preserving strength, productivity, and corrosion resistance.

Controlled coiling, pickling, and Al hot-dipping help thick hot-rolled steel keep coating adhesion and 10-33 μm thickness after hot-stamping.

Varying aluminum plating across annular steel sheets speeds overlap heating in hot stamping while preserving strength and corrosion resistance.

A high-emissivity thin steel sheet helps annular hot-stamping blanks keep uniform hardenability, reducing torsion and dimensional error.

Controlled heat treatment limits aluminum effects in laser-welded precoated steel blanks, producing homogeneous martensitic or bainitic weld joints.

Controlled solid-soluted boron in zinc-plated hot stamping steel suppresses LME cracks while preserving 800-1300 MPa strength.

A Ni-based coating keeps hot-press steel sheet thickness stable during fast heating while resisting oxidation, embrittlement cracking, and paint loss.

Fe-based preplating and annealing control suppress Si oxide effects and zinc penetration, improving weld crack resistance in galvannealed steel sheets.

Controlled annealing, quenching, and partitioning create a multiphase steel sheet that balances 1180 MPa strength with ductility and hole expansion.

Recycled aluminum scrap is refined into Al-Si coating ingots, cutting smelting energy and carbon emissions while preserving corrosion resistance and weldability.

An Fe-based pre-plating layer limits Si oxidation and zinc penetration, improving weld crack resistance and coating quality in automotive steel sheets.

A phase-controlled Al-Zn-Mg plating layer forms a barrier against Zn evaporation and hydrogen penetration, preserving corrosion and fatigue.

A controlled coiling window limits intergranular oxidation so 1.8-5 mm Al-coated hot-rolled steel keeps adhesion, weldability, and coating thickness.

High rolling force, controlled roll roughness, and gas knife spacing cut dross, coating defects, and waviness in Zn-coated steel sheet.

Controlled laser cutting creates low-aluminum cut edges on precoated steel sheets, improving hot-formed weld hardness and strength.

A Zn-Si-Fe aluminum plating layer helps hot press steel release hydrogen, reducing delayed fracture while preserving strength for auto parts.

Controlled alloying and cooling produce low-CE multiphase steel with GPa-class strength, weldability, and strong hole expansion.

Controlled ferrite, martensite, and retained austenite help galvanized steel reach 980 MPa-class strength without sacrificing weldability or formability.

A hydrogen barrier coating on tailored rolled blanks limits hydrogen uptake during austenitization and improves delayed fracture resistance.

An Al-Zn-Si coating and WOP-based furnace settings keep diffusible hydrogen at 0.4 ppm or less, reducing cracking in press-hardened steel.

An elastic layer and expandable gasket let a carbide sleeve rotate with a steel journal without cracking in molten metal coating lines.

A selective high-emissivity coating creates different heating rates in one hot-stamped steel sheet, enabling robust multi-strength parts without complex molds.

Al-Fe filled metal around a spot weld blocks corrosion and hydrogen intrusion, helping 1.5 GPa steel joints resist embrittlement.

Controlled alloy factor and carbide size help hot-formed steel reach 1000 MPa strength while improving bendability and collision energy absorption.

Controlled Al-Zn-Si-Fe plating and cooling improve adhesion, corrosion resistance, and surface quality after hot press forming.

Controlled surface carbon and Mn-Cr ratios in plated hot-press steel improve impact resistance and workability at 1500 MPa strength.

Controlled phase fractions and heat treatment let cold-rolled steel exceed 950 MPa while preserving 14% elongation for automotive forming.

Controlled CaO-Al2O3 inclusion size and steel composition prevent hydrogen embrittlement cracks while preserving 1600 MPa hot-stamped strength.

Controlled rolling and two-stage annealing keep grain size and phase fractions uniform across steel sheet width, improving formability at 590 MPa+.

Different corrosion and scale coatings on tailored-welded hot-formed blanks improve design freedom, lightweighting, and hydrogen resistance.

Controlled ferrite-martensite microstructure and coiling conditions help steel sheet combine high strength, ductility, hole expansion, and low-temperature toughness.

Meniscus coating with real-time thickness control enables continuous analyte sensor production with lower cost and less batch variation.

Al-Mg plating suppresses Si-based slag on galvanized weld beads, improving electrodeposition coating and corrosion resistance.

Controlled SPM texturing plus a chromate-free coating gives galvanized steel a burr-free, dyeable surface with corrosion resistance and anti-fingerprint protection.

A phase-controlled Al-Zn-Mg coating blocks molten Zn and hydrogen penetration in hot-stamped steel while improving chemical convertibility.

Controlled Cr, Mn, Mo, and cooling promote auto-tempered martensite and fine carbides, improving hot-stamped steel strength and bendability.

A nickel-rich intermediate coating blocks zinc penetration during heating, reducing LME cracks while preserving strength and adhesion.

NiCr or CrMn filler wire and controlled Al-Si plating chemistry limit Al mixing, preserving martensite and weld strength after hot press forming.

A nickel-enriched surface layer helps press-hardening steel exceed 1800 MPa while improving ductility and resistance to hydrogen cracking.

Selective coating removal from steel interface surfaces prevents weld impurities and porosity while preserving corrosion protection elsewhere.

Minimal-stress skin-passing preserves a magnesium-rich oxide layer on coated steel sheet, maintaining corrosion protection and reducing adhesion issues.

Controlled multiphase microstructure and boron grain-boundary segregation help galvanized steel keep press formability and resist hydrogen embrittlement.

Controlled ferritic tin-coated steel preserves varnish and reduces rupture during high-necking and curling of one-piece aerosol cans.

A reduced-nickel steel layer paired with carbide coating cuts brake disc wear, oxidation, and nickel particle release.

Ni diffusion to high-angle grain boundaries and prior austenite grains of 10 μm or less help hot-stamped steel resist hydrogen embrittlement.

Controlling alloy composition and interfacial gamma phase thickness helps galvannealed steel resist powdering during complex automotive panel forming.

An upper bainite and carbide-rich steel sheet improves hardenability, crack resistance, and quenching in thick hot-stamped parts.

Controlled quenching, partitioning, and hot-dip coating create coated steel sheet with high strength, ductility, hole expansion, and weldability.

A zinc-alloy layer plus HDPE top coating helps steel wire netting resist humidity, corrosion, abrasion, and impact without PVC leaching.

A carbon gradient and controlled bainite-martensite microstructure help galvanized steel keep high strength, hole expansion, and delayed fracture resistance.