Mold forming and cutting of sheet metal are manufacturing processes commonly used in the manufacturing of products such as vehicles and household appliances.
Demanded new generation sheet materials, faster manufacturing processes brought about by mass production, lubricant use restrictions due to environmental factors; It brings new challenges to molds, which accelerates the formation of mold damage.
The process from mold design to steel selection and PVD coating is now even more important.
We always try to be one step ahead with our Metistec Coldplus series PVD coating applications and create PVD coating compositions with advanced features such as lower friction coefficient on mold surfaces, higher adhesion forces, high hardness and corrosion resistance.
There are four important steps to consider when choosing PVD Coating in molds such as forming, cutting, precision cutting and progressive for cold work applications.
1. DAMAGE MECHANISM; It is necessary to determine the effective wear mechanism. It is necessary to determine whether it is wrapping/plastering wear or sharp corners rounded – scratched wear.
2.PROCESSING QUALITY, The processing quality of the working surfaces, that is, those exposed to loads, must be at a very good level. For example ; Cutting steps need to be increased to minimize the EDM layer during machining.
3. HARDENING HEAT TREATMENT PROCESS, In the hardening heat treatment step, it is necessary to temper/temper the steel at a high temperature (>500C) so that both the coating process temperature and no residual austenite remain.
4.COATING SELECTION: It is necessary to choose the right tool steel, heat treatment hardness and most importantly, the right coating according to the working conditions. Depending on the application, the type of workpiece, its thickness, operation steps and numbers, etc. The right coating selection must be made in the light of details such as.
Our ColdPlus PVD Coating Samples
| Coating Series | Coating Composition | Colour | Hardness (HV 0.05) | Coefficient of friction (against steel) | Thickness (μm) | Oxidation/Decomposition Temperature (°C) | General Features | Application Recommendations Mold |
|---|---|---|---|---|---|---|---|---|
| ColdPlus | CrN / CrCN | Silver Grey | 2000±200 / 2300±200 | 0,30 / 0,25 | 2 – 8 | 600°C | * It combines high abrasion resistance (adhesive type, that is, high resistance to winding-adhesion) and low friction coefficient. * It has low coating internal tension * The adhesion ability and strength of the coating to the surface is very high * It is resistant to corrosion | Forming-spinning molds in cold work applications (plastered workpiece; especially non-ferrous sheet metal, e.g. sheet metal raw material Aluminum, Brass, Copper, etc.) |
| ColdPlus | TiN | Gold | 2400±200 | 0.6 | 2 – 4 | 500 °C | * It has high abrasion resistance (high resistance to abrasive wear - high resistance to scratching). * Bio compatibility. | In simple cutting dies in cold work applications |
| ColdPlus | TiCN | Gray blueish | 3300±500 | 0.3 | 2 – 4 | 400 °C | * It has a low friction coefficient with high wear resistance (resistant to abrasive wear) | In simple cutting dies in cold work applications |
| ColdPlus | TiSiN | Bronze | 3900±500 | 0.5 | 2 – 4 | 1000 °C | *It has the property of high degree of hot wear and cold wear resistance. *Due to its nanocomposite structure, the toughness of the coating layer is high. * Coating thickness is limited. | Precision cutting in cold work applications (in molds with low shear clearance tolerance), breakout cutting and deep forming-spinning dies (if the workpiece is iron-based) |
| ColdPlus | TiCrSiN | Dark Golden | 3700±200 | 0.3 | 2 – 8 | 700°C | * It also includes very high abrasion resistance (both adhesive type; wrapping-adhesion and abrasive type; scratch resistance is very high) and low friction coefficient. * It has very high coating toughness and excellent coating adhesion ability to the surface. | Working conditions in cold work applications, in challenging deep forming - spinning molds (plastered workpiece; * iron-based sheet and at the same time low strength and/or thin sheet thickness * If it is a stainless steel sheet * If it is a zinc - galvanized sheet) |
| ColdPlus | TiAlN / TiAlSiN | Rose gold | 3000±200 | 0.4 | 5 – 8 | 800°C | * It has high hot abrasion resistance with high coating toughness.* It is an entry-level coating compound and has developed nanocomposite forms. | In cold work applications, the workpiece is used in forming-spinning molds with a high thickness of the sheet metal |
| ColdPlus | AlCrN / AlCrSiN | Light Grey | 3300±300 | 0.5 | 3 – 5 | 1100°C | *It has very high hot abrasion resistance.*Its hot hardness is high compared to other coating compositions and it is excellent in maintaining its stable structure at high temperatures. | In molds with precision cutting and dry cutting in cold work applications (hot hardness feature comes to the fore due to the high temperature formed at the interface) |
| ColdPlus | AlTiCrSiN | ark Anthracite Grey | 3700±200 | 0.5 | 4 – 8 | 1000°C | *It has excellent combination of hot hardness, toughness, high temperature stability. *Although a thick coating layer can be formed, the internal stress is low and stable. | In cold work applications, breakout cutting and difficult deep forming-spinning dies (plastered workpiece; iron-based sheet and at the same time medium to high strength and/or high thickness) |
| ColdPlus | AlTiN / AlTiSiN | Anthracite Grey | 3400±300 | 0.7 | 2 – 4 | 900°C | *It has a combination of high hot hardness and toughness.*Coating thickness is limited. | In cutting dies in cold work applications |
| ColdPlus | ZrN /ZrCN | Light Gold | 2800±200 | 0.4 | 1 – 5 | 500°C | * It is a type of coating with low surface tension, high hardness and chemical stability. * It is resistant to corrosion. | In cold work applications, non-ferrous raw materials (Aluminum, Brass, Copper, etc.) are cut and formed-spinning molds |
| ColdPlus | DLCPLUS® / a-C : Me | Black | 1800±200 | 0.1 | 1 – 3 | 400°C | *It has high sliding ability and very high adhesive wear resistance. *Biocompatible and has high corrosion resistance | Cutting, drilling and forming applications with reduced lubrication in cold work applications (workpiece; non-ferrous aluminum, brass, copper, etc.) |
