Front Subframe Mold Surface Coating Technology & Galling Resistance Improvement

Front subframe mold cavity with TiN or DLC coating reduces friction coefficient between sheet metal and mold surface, suppressing galling risk and extending cavity service life by 52% for aluminum alloy stamping.
Physical vapor deposition coating forms a hard thin film on cavity surface. The coating has high hardness and low friction, avoiding aluminum material adhesion which easily occurs in aluminum subframe forming. Coating treatment is applied after cavity polishing and dimensional finishing.
Aluminum stamping data shows uncoated mold steel suffers galling and aluminum built-up edge after about 30,000 cycles, which scratches workpiece surface and requires frequent mold cleaning and re-polishing.
Local front subframe mold suppliers can arrange coating outsourcing for urgent mold upgrade projects and provide 24-hour guidance for coating protection during mold tryout.
There are differences between TiN, TiCN and DLC coating. DLC has lower friction and better anti-galling performance for aluminum blank, while TiN is more economical for high-strength steel stamping.
A common pitfall is applying coating before final dimensional machining. The coating layer has certain thickness and will change cavity dimension, causing part size deviation.
Cavity surface coating increases front subframe mold cost by 10%–21%. This cost is mainly for pre-coating polishing, cleaning and PVD coating processing.
Common coating related failures include coating peeling, chipping and local delamination. Cavity surface must be free from scratches and residual stress before coating process.
When comparing front subframe mold manufacturers, ask for coating test samples and coating thickness inspection records. Reliable suppliers control coating thickness precisely according to blank material.
Anti-galling hard coating for front subframe molds is widely used for aluminum alloy chassis subframe forming in new energy vehicle projects.
FAQ
Q1: What coating is suitable for aluminum alloy front subframe mold cavity?
A: DLC coating performs best for anti-galling when stamping aluminum alloy blanks; TiN / TiCN for high strength steel.
Q2: What is mold galling in aluminum stamping?
A: Aluminum material adheres to mold cavity surface, causing scratches on stamped parts and cavity damage.
Q3: How much extra cost for cavity hard coating?
A: PVD hard coating treatment adds 10% to 21% of total front subframe mold cost.
Q4: Which front subframe mold supplier provides PVD coating service?
A: Source mold factories cooperating with professional PVD coating vendors and controlling pre-coating machining quality.
Q5: What will cause coating peeling?
A: Cavity surface scratches, poor cleaning and excessive residual stress before coating will lead to coating delamination.
Q6: Can coated cavity be polished after coating?
A: Light fine polishing is acceptable; heavy grinding will remove the hard coating layer.