HD500End Mills
Coating Solutions for Steel Milling
Features of machining with solid carbide tools
profile milling
Shoulder milling
heavy duty milling
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Characteristics Of Milling:
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1. Milling is intermittent machining, and the cutting load changes periodically, which is prone to impact and vibration;
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2. There are many types of elements in the processed materials, such as titanium alloys and stainless steel. When milling, they are prone to react with the coating, causing the tool to stick during processing;
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3. Milling has high efficiency and high requirements for tool wear resistance.
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high hardness
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low friction coefficient
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high binding strength
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high chemical stability
Coating Solutions for Milling Steel
Introduction to Coatings for Milling Applications on Steel
Coating Grades: HLM300, HPR125, HHR110
Application Range:
HLM300: General-purpose coating, especially suitable for machining materials such as plain steel (32-48HRC), stainless steel, and cast iron.
HPR125: Suitable for low hardness plain steel (20-35HRC).
HHR110: Suitable for hardened steel (HRC55-62).
Coating Characteristics:
HLM300: General-purpose coating with excellent surface quality, uniform and dense structure, low stress, high hardness, and good adhesion.
HPR125: Coating with fewer droplets on the surface, dense structure, moderate thickness, and relatively high hardness.
HHR110: Excellent impact resistance and crack propagation resistance, high density, and good oxidation resistance.
Metal Cutting - End Mills
HLM300 coating principle:
The new HA800 compound machine independently developed by Huasheng uses arc ion plating technology to adjust the coating structure and achieve a bias gradient. The prepared coating has a uniform and dense microstructure and excellent mechanical and tribological properties.
Application area:
Ordinary steel (32–48 HRC), stainless steel and cast iron
718H Milling
Tool data: OMPQ-4E-100
Workpiece: 718 HRC52
Test condition: milling
( cutting speed)Vc =150m/min
(feed speed)Fz =0.06mm
(cutting depth)ap = 5mm
(cutting width)ae = 0.5mm
(cooling methode): air cooling
Test results:
The comparison of wear amounts after 480 minutes of processing:
· Wear amount of competitor is 0.079mm;
· Wear amount of HLM300 is 0.064mm;
· Workpiece using HLM300 has better wear resistance.
Date source: terminal laboratory
480min-Competitor
480min-Competitor
Coating properties:
| Coating Composition: | AlTi-base |
| Coating Color | black |
| Coating Thickness（μm） | 2.5±0.5 |
| Coating hardness HIT（GPa） | 34±3 |
| residual compressive stress（GPa） | -4.0±1 |
| coating temperature（℃） | < 500 |
| Maximum Operating Temperature: （℃） | 1100 |
Metal cutting - rod cutter
HPR125 coating principle:
The new HA800 compound machine independently developed by Huasheng uses arc ion plating technology to adjust the coating structure and achieve a bias gradient. The prepared coating has a uniform and dense microstructure and excellent mechanical and tribological properties.
Application area:
low hardness ordinary steel (20HRC-35HRC)
Milling of Carbon Steel (P20)
Tool data: D6R3*50 ball end mill
Workpiece: P20 (30HRC)
Test condition: milling
( cutting speed)Vc =169m/min
(feed speed)Fz =0.20mm
(cutting depth)ap = 0.3mm
(cutting width)ae = 0.15mm
(cooling methode): air cooling
Test results:
The width of the flank wear band at 50 μm is the benchmark for tool life determination.
· Huasheng HPR125 coated tools can be used for 360 minutes;
· The tool life of competitor coated tools is 120 minutes;
· Cutting life is increased by 200%.
Date source: terminal laboratory
120min(24.2um)-HPR125
120min(24.2um)-Competitor
Coating properties:
| Coating Composition: | AlCrN基 |
| Coating Color | light gray |
| Coating Thickness（μm） | 2.5±0.5 |
| Coating hardness HIT（GPa） | 34±3 |
| residual compressive stress（GPa） | -3.5±1 |
| coating temperature（℃） | < 500 |
| Maximum Operating Temperature: （℃） | 1100 |
Metal cutting - rod cutter
HHR110 coating principle:
The new composite machine HA800, independently developed by Huasheng, adopts arc ion plating technology to adjust the coating structure, achieving a bias voltage gradient. The resulting coating has a uniform and dense microstructure, offering excellent mechanical and tribological properties.
Application areas:
Hardened steel（55HRC-62HRC）
Milling of High-hardness Steel (SKD11)
Tool data: D6R3*50 ball end mill
Workpiece: SKD11 (58-62HRC)
Test condition: milling
( cutting speed)Vc =141m/min
(feed speed)Fz =0.033mm
(cutting depth)ap = 0.15mm
(cutting width)ae = 0.3mm
(cooling methode): air cooling
Test results:
The width of the flank wear band at 100 μm is the benchmark for tool life determination.
· Huasheng HPR110 coated tools can be used for 120 minutes;
· The tool life of competitor coated tools is 100 minutes;
· Cutting life is increased by 20%.
Date source: terminal laboratory
100min(80.72um)-HHR110
100min(98.73um)-Competitor
Coating properties:
| Coating Composition: | AlTiXN |
| Coating Color | bronze color |
| Coating Thickness（μm） | 2.0±0.3 |
| Coating hardness HIT（GPa） | 35±3 |
| residual compressive stress（GPa） | -5±1 |
| coating temperature（℃） | < 550 |
| Maximum Operating Temperature: （℃） | 1200 |
Challenges of Titanium Alloy Machining
| Titanium Alloy | Low Thermal Conductivity (7.955 W/m·K) | Thermal Shock from Elevated Cutting Temperatures |
| Low Elastic Modulus (110 GPa) | Springback-Induced Friction & Tool Vibration | |
| Low Plastic Deformation Resistance | Workpiece Deformation & Poor Surface Finish | |
| Suboptimal Actual Hardness (30 HRC) | Adhesion-Induced Tool Surface Damage | |
| High Chemical Reactivity | Surface Hardening & Diffusion (O/N Reaction) |
Extremely High Cutting Temperature
Severe Cutting Adhesion
Chipping During Machining Impact
Titanium Alloy Milling Application Overview
● HuaSheng®G4-S is committed to solving technical problems such as high cutting impact and temperature, strong work hardening tendency, and strong chip adhesion when machining titanium alloys. Different components, structures, and process designs are used for different working conditions to meet the needs of general machining, finishing, and rough machining.
● Applicable to the processing of ISO standard S-type (titanium alloy) materials, especially TC4, TA4, titanium/aluminum composite materials.
● Suitable for milling applications of titanium alloy materials such as mobile phone frames, artificial joints, corrosion-resistant workpieces, and aerospace parts.
HuaSheng® G4-S Tool Coating for Difficult-to-Cut Materials
Process Material：
Titanium Alloy, Stainless Steel, HRC48-65 Hardened Steel
Cooling Method: Water/Air Cooling
| Coating Composition | AlTiXN |
| Color | Bronze |
| Thickness（μm） | 2.5±1 |
| Vickers hardness at room temperature（GPa） | 40±2 |
| Residual compressive stress（GPa） | -4.5±1 |
| Coating Temperature（℃） | < 550 |
| Maximum Operating Temperature（℃） | 1200 |
| Technical Features | Coating Performance |
| New integrated cathode coating technology | While having a high ionization rate, the coating is dense and droplet-free. High hardness, low stress, and impact resistance |
| Brand new AlTiN/TiXN composite structure design | While maintaining high hardness, further enhancing impact resistance and crack growth resistance |
| Refined X Element Grains | Low friction coefficient, good anti-adhesion performance |
G4 Application of Coating on Titanium Alloy Machining Tool
G4-S Application in Rough Milling of TC4 Titanium Alloy
Flank Wear（um）
Tool Specification: Round Nose
D6R0.3*H15*D6*50L*4F
Process Material:
TC4 (Ti6Al4V) Hardness: 30HRC
Test Conditions: Rough Milling
Cutting Speed Vc = 150m/min
Feed Speed F = 2500
Cutting Depth ap = 3mm
Cutting Width ae = 0.22mm
Cooling Method: Emulsion
Test Standard: Comparison of wear values after 120 minutes run
Conclusion analysis: G4-S2 coating reduces the back wear value of the tool by 23% compared with the competitor's DR coating and 20% compared with the NF coating. And the tool does not break.
Source: Huasheng Machining Laboratory
G4-S2
Competitor
G4-S Significant reduction in flank wear
G4-S No sticking chips or chipping on the front blade
Application of G4 coating in milling of titanium alloys
G4-S application in milling finishing of TC4 titanium alloy
Finishing service life (piece)
Tool specifications: Forming milling cutter
D17.44-21.87H-5E-D20-70L-T1
Workpiece: TC4 (Ti6Al4V)
hardness：30HRC
Machining method: side milling - finishing
Test result: In the processing test, the G4-S1 coating prepared using G4 technology improved by 113% compared to the arc TiSiN coating. It improved by 13% compared to the market's best coating.
Data source: customer terminal
The coating is dense and defect-free
The surface is smooth and does not attract crumbs
High hardness and low stress
Suitable for titanium alloy finishing conditions
back of the knife
contour-molding cutting edge