HEAT TREATMENT OILS
Advanced Quenching & Hardening Solutions for High-Precision Metallurgical Applications
Heat treatment oils are specialized fluids formulated to meet the demanding requirements of modern metal hardening processes, ensuring optimal cooling rates, surface protection, and minimal distortion. They play a critical role in applications such as quenching, induction hardening, martempering, and surface blackening, across automotive, industrial, and tooling sectors.
These fluids can be mineral oil-based, synthetic, or water-soluble polymer-based, providing tailored solutions for:
- Surface and through hardening
- Controlled cooling for distortion-sensitive parts
- Vacuum and hot bath applications
- Corrosion-resistant surface finishes
Product Categories & Technical Features
1. Water-Based Quenching Fluids
Polymer-based alternatives to conventional oil quenchants for safer and cleaner hardening operations.
Key Features:
- Composed of polyalkylene glycols (PAGs) with adjustable viscosities (2,000–19,000 mm²/s at 40°C)
- Form emulsions or clear solutions with water
- Incorporate:
- Corrosion inhibitors
- Biocides and pH stabilizers
Applications: Surface hardening of medium alloy steels and hardenable aluminum alloys
Benefits:
- Prevents cracking, microcracks, and distortion
- Enhanced workplace safety and coolant life
2. Induction Hardening Fluids
Tailored for induction heating followed by rapid quenching.
Key Characteristics:
- Polymer-based, water-dilutable
- Precise control over cooling speed and surface transformation
Suitable for:
- Low, medium, and high alloy steels
- Aluminum alloys
Advantages:
- Uniform hardening
- Reduced risk of surface defects or structural warping
3. Vacuum Quenching Oils
Engineered for use in vacuum furnaces, where cleanliness and controlled cooling are critical.
Composition:
- Refined mineral base oils
- Advanced anti-oxidation and evaporation-resistant additives
Ideal for:
- Tool steels
- High-speed steels
- Alloyed/unalloyed steels
Benefits:
- Low volatility and gas entrainment
- Produces clean, distortion-free surfaces—especially important for gears, bearings, and precision shafts
4. Martempering Oils – QUENCHOIL Series
Optimized for step-quenching or interrupted quenching processes.
Formulated with:
- Highly refined mineral oils
- Additives for oxidation resistance and low resin formation
Applications: Hardening of cementation and tempered steels. Components requiring tight distortion control:
- Gears
- Pins
- Bolts
- Shafts
- Needles
Key Advantages:
- Improved dimensional accuracy
- High hardness consistency
- Broad temperature compatibility
5. Martempering Oils for High-Distortion Risk Components
Specially designed for parts that are prone to dimensional changes during quenching.
Features:
- Short vapor phase for fast and uniform heat transfer
- Supports even hardening of thin and thick sections
Used in:
- Automotive driveline and suspension components
- High-tolerance industrial parts
Benefits:
- Reduces internal stress
- Enhances structural uniformity
6. Hot Bath Hardening Oils – QUENCHOIL Series
Ideal for controlled temperature quenching baths in carbon and alloy steels.
Core Attributes:
- Mineral-based with high thermal and oxidative stability
- Resistant to sludge formation and discoloration
Best Suited For:
- Gears
- Shafts
- Bearing rings
- Pressed sheet metal components
Performance Benefits:
- Excellent surface finish
- Long operational life
- Reduced component warping
7. Blackening Fluids
For post-heat treatment surface protection and aesthetic enhancement.
Formulation:
- Mineral oil-based
- Contains compounds that create a protective black oxide layer
Common Uses:
- Fasteners
- Industrial hardware
- Decorative metal parts
Application Note:
- Best results when emulsified with demineralized water
- Produces a shiny, corrosion-resistant finish
Feature Matrix & Benefits Overview
| Feature | Benefit |
|---|---|
| Adjustable Cooling Profiles | Tailored heat transfer for each metal grade and geometry |
| Corrosion Protection | Prolongs part life and reduces post-treatment defects |
| Minimal Distortion | Essential for precision components and automotive parts |
| Compatibility with Alloys | Effective across steels, aluminum, and specialty alloys |
| Synthetic & Oil-Based Options | Full range of safety, performance, and ecological compatibility |
| Biocidal and Anti-Microbial Control | Prevents bacterial contamination in polymer fluids |
| High Oxidation Stability | Long-lasting performance and minimal maintenance |
| Clean Surface Finish | Reduced post-treatment cleaning requirements |
Industrial Applications
- Automotive manufacturing – gears, shafts, CV joints, fasteners
- Tool and die making – punches, dies, cutting tools
- Aerospace components – high-strength steel parts
- Industrial equipment – bearings, pins, actuators
- Metal finishing – blackened hardware, decorative fasteners
This comprehensive portfolio of heat treatment oils and quenching fluids delivers precision control, thermal efficiency, and metallurgical reliability across a broad spectrum of industries. With choices between synthetic, mineral, polymer-based, and water-miscible systems, these solutions ensure:
- Enhanced metallurgical performance
- Reduced operational costs
- Improved worker safety
- Superior component quality and consistency