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  • What is Y-coat
  • YUKEN's advantage
  • New release information
  • Variation
  • Case studies
  • Our techinical skill

Products FAQ

Inquiry

For inquiry about Y-coat, please contact the below plant/offices (Click to open windows)

Takatana Plant
(Sales, R&D, Production)

Tokyo Office (Sales)

Kita-Kanto Office (Sales)

Contact us via e-mail

Effect cases

Y-coat's Merits in Different Processes

Here we introduce Y-coat effects and merits under various cases, and recommend the most suitable coating types based on our rich knowledge and experience.
Please contact us if you need more details.

Theme

Longer and More Stable Life for Punch Die

Name： Punch Die Die Material： Super Hard V30 Equivalent
Work Piece： SCM Size： Φ20×25mm
Surface：CVD-TiCN  
Problem ・When processing was done with CVD-TiCN, the life was not stable (100～150,000 shots) due to damage to the punch itself.
Countermeasure ・Changed to Y-coat Type CN ( TiCN ) using ion-plating method, which resulted in constant and stable compressive stress to plated film.
Result

・Usable life became constant, leading to reduction in total cost.

Effect of having stable compression pressure.

Theme

Longer Life for Tooth-Form Punch

Name： Tooth-Form Punch Die Material： SKH51
Surface： TiCN  
Problem ・Lasted only 10,000 shots due to abrasion.
Countermeasure ・Added nitriding process Y-coat Type KCN ( nitriding + TiCN ) for abrasion resistance.
Result

・It now lasts 40,000 shots.

Multi-process to increase durability

Theme

Improved Punch Life for Automotive Parts

Name： Hole Punch Die Material： HAP72
Material to Be Punched： SWCH10R Method： Metal Forming Machine
Surface： Al-Based Film  
Problem ・High frequency of die change due to galling on landing areas at 130K shots.
Countermeasure ・Y-coat Type AⅡ was coated as it controls deterioration caused by heat during sliding motions with excellent surface flatness and wear resistance.
Result

・Die life sighnificantly improved because friction was controlled with better heat resistance and wear resistance.

Theme

To Gain Longer Durability in Body-Pillar Cutting Process

Name： Cutting Blade Die Material： SKD11
Work Piece： Plated Steel Plate Thickness： 1.4ｍｍ
Surface： TiC (CVD）  
Problem ・With TiC (CVD) process, cracks appeared after 8,000 shots.
・Re-processing at welded area was not possible.
Countermeasure ・Improved welding repair of damaged areas
・Coated with Y-coat Type V which has same hardness as TiC (Hv 3,300)
Result

・Life-time increased to 30,000 shots
・Able to re-use after welding repair

Increased toughness of film mitigated chipping. Able to coat on top of welded area.

Theme

Longer Durability in Stainless Steel Process

Name： Drawing Die Die Material： SKD11
Work Piece： Stainless Steel 40 Thickness： 1.5ｍｍ
Surface： TD Treatment  
Problem ・Needed polishing maintenance once a month due to welding and galling caused by stainless steel dust.
Countermeasure ・Used CrN to prevent stainless steel welding.
・Used multi-process with nitriding ( Y-coat Type KR ) to prevent galling.
Result

・With TD treatment, once-a-month maintenance was needed, but with above process maintenance is needed just once every 6 months.

No galling appears due to CrN resistance against welding and cracks.

Theme

Improved Pressing Die Life

Process： Drawing Product Material： 440
Die Material： SKD 11 Capacity： 1,000 t
Speed of Pressing： 18 spm Surface Treatment： TD Treatment
Die Life： 39,000～150,000 shots
Problem ・Size differences of the dies after TD treatment resulted in various die life durations.
Countermeasure ・Treated with Y-coat Type KG which excels in hardness and leveling of the surface after treatment.
Result

・Drastically improved die life. More stable and increased mass production was obtained by resolving dimensional differences of the die after treatment.

Theme

Improved Die Life in Transmission Part Drawing Process

Name： Drawing Die Die Material： SKD111
Material to Be Drawn： SPH440 Lubrication Machining： Oil
Surface： Al-Based Film
Problem ・Galling occurred, and it was transferred to the surface of parts at 20,000 shots. The die could not even be reused due to deep scratches.
Countermeasure ・Y-coat Type KAⅡ with excellent surface flatness and seizure resistance was applied.
Result

・The life was extended more than 5 times to 100,000 shots.
・The die was reusable as there was just insignificant and shallow galling. 

Theme

Improved Quality of Injection Molding

Dies： Injection Molding Screw 3 parts (Screw Head, Check Ring, Sealing Ring)
Molding Materials： LDPE
Surface Treatment： No Treatment, TiN Treatment
Problem ・Carbon on screw parts created dark dot failures on product surface, causing lot failures 3 to 4 times a month.
Countermeasure ・Coated with Y-coat Type BL which excels in release and prevents re-adhesion.
Result

・Drastically reduced carbon on molding dies and improved stable quality production. Monthly lot failures went down to zero.

Theme

Decreased Corrosion of Resin Molding Die 

Products： Functional Parts Process： Injection Molding
Resin Materials： PA6T (Nylon), Engineering Plastic
Materials of Die： SKH51 (HRC64) Surface Treatment： No Treatment
Corroded Area on Die： Sliding Area / Movable Pin
Problem ・Dies got corroded in about a month due to corrosive gas. Periodic cleaning and lapping of damaged areas were necessary.
Countermeasure ・Coated with Y-coat Type BL which excels in corrosion resistance.
Result

・Continuously in use for more than 1 month without corrosive damage

樹脂成形加工における効果事例 3

Theme

Improved Resin Molding Failures

Parts： Coil Component Molding Temp.： 320℃
Resin Materials： PPS + GF 30%, Super Engineering Plastic
Molding Methods： Injection Molding Materials of Die： HPM 38 (HRC 52)
Die Area： Fixed・Movable Pin / Sliding Area Surface Treatment： No Treatment
Problem ・Periodic maintenance was necessary because traces from ejector pins were copied to products after 1,000 shots.
Countermeasure ・Coated with Y-coat Type BL which excels in its release properties.
Result

・Failures due to traces of ejector pins declined to zero until 22,000 shots.

Theme

Improved Duration of Aluminum Casting Die

Name： Chill-Vents on Fixed & Movable Sides Process： Aluminum Casting (Vacuum)
Parts Material： ADC 12 Die Material： SKD 61
Surface Treatment： Nitriding Treatment
Problem ・Die was being exchanged after 30,000 to 50,000 shots due to abrasion. Periodic polishing was needed to have enough vacuum status since hot melt aluminum was adhered to the vents on both the fixed and movable sides.
Countermeasure ・Coated with Y-coat Type KC which excels in anti-adhesion and anti-abrasion properties.
Result

・Improvement of anti-adhesion and anti-abrasion properties enabled newly coated dies to reach 150,000 shots without maintenance.

Theme

Improved Product Quality of Hot Forging

Die Name： Punching Die for a Bearing Process Name： Piercing
Material of Parts： SUJ 2 Die Material： SKD 61
Surface Treatment： Ion Nitriding Life： 10,000～15,000 shots
Problem ・There was abrasion on the punch due to secondary heat. Experienced product adhesion on side area of the punch.
Countermeasure ・Coated with Y-coat Type KC which excels in anti-adhesion and anti-abrasion properties.
Result

・Improved die life to 43,000 shots and enhanced stable quality production.

Freaquently asked questions

Frequently asked questions about our Y-coat process.

See FAQ

Inquiries of Our Company

For inquiry about Y-coat, please contact the below plant/offices.

Takatana Plant(Sales, R&D, Production)
Contact us via e-mail

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