Machining Invar 36 (Fe-Ni36): Speeds & Feeds, Tooling & Best Practices
Technical machining guide for Invar 36 (Fe-Ni36) (Zero-Thermal-Expansion Alloy): optimal cutting speeds (35 - 65 m/min), feeds (0.05 - 0.12 mm/tooth), hardness (130-160 HB), and precision manufacturing practices.
Engineering Specifications & Parameters
| Chip Load (fz) | 0.05 - 0.12 mm/tooth |
| Material Grade | Invar 36 (Fe-Ni36) |
| Material Hardness | 130-160 HB |
| Cutting Speed (Vc) | 35 - 65 m/min |
| Alloy Classification | Zero-Thermal-Expansion Alloy |
| Primary Applications | Satellite optical laser benches, astronomical telescope mete... |
Material Properties & Machinability Profile
Invar 36 (Fe-Ni36) is classified as a Zero-Thermal-Expansion Alloy widely specified for mission-critical components requiring Satellite optical laser benches, astronomical telescope metering rods, and carbon fiber composite curing molds..
Engineering Kinematics & Cutting Parameters
- Material Hardness: 130-160 HB.
- Recommended Cutting Speed ($V_c$): 35 - 65 m/min with dedicated substrate coatings.
- Chip Load ($f_z$): Maintained between 0.05 - 0.12 mm/tooth to prevent tool rubbing or excessive mechanical shock.
- Machinability Challenge: Near-zero thermal coefficient of expansion (1.2 x 10^-6 /K); requires balanced roughing and thermal stress-relief cycles.
- Tooling Strategy: Employs high-pressure flood coolant (>= 30 bar) and micro-grain carbide or specialized inserts with positive rake geometries.
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Frequently Asked Questions
What cutting speed is recommended for Invar 36 (Fe-Ni36)?
Optimal cutting speeds range from 35 - 65 m/min depending on roughing vs finishing passes and machine tool rigidity.
How does UCAN ROBOT manage tool wear when cutting Invar 36 (Fe-Ni36)?
We implement in-process tool monitoring, rigid toolholder systems, and high-pressure through-spindle coolant to dissipate cutting heat immediately.
