Vacuum Heat Treatment Furnace Manufacturer
HaoYue Group — ISO 9001 Certified Vacuum Heat Treatment Furnace Manufacturer
As a leading vacuum heat treatment furnace manufacturer, HaoYue Group designs and builds advanced vacuum heat treatment systems for tool steel hardening, vacuum annealing, vacuum tempering, solution treatment, and high-pressure gas quenching. With 15+ years of specialized experience and over 500 thermal processing systems installed worldwide, we deliver precision heat treatment equipment that meets AMS 2750F, NADCAP, and industry standards.
What Is a Vacuum Heat Treatment Furnace?
A vacuum heat treatment furnace is a thermal processing system that heats, holds, and cools metal components under vacuum or controlled inert gas atmosphere to alter their physical and mechanical properties. By eliminating oxygen and reactive gases during the heating cycle, vacuum heat treatment furnaces produce parts with bright, oxide-free surfaces while achieving precise metallurgical outcomes.
Key vacuum heat treatment processes include:
- Vacuum Hardening — Austenitization followed by rapid quenching for maximum hardness
- Vacuum Tempering — Controlled reheating after hardening to reduce brittleness and achieve target toughness
- Vacuum Annealing — Slow, controlled cooling to soften materials, relieve stresses, and improve machinability
- Vacuum Solution Treatment — Heating to dissolve precipitates followed by rapid cooling for age-hardenable alloys
- Stress Relieving — Low-temperature treatment to reduce residual stresses from machining or forming
- Vacuum Carburizing — Carbon diffusion into steel surfaces under low pressure for enhanced case hardness
HaoYue Vacuum Heat Treatment Furnace Series
T Series — Multi-Purpose Vacuum Heat Treatment Furnace
HaoYue's flagship T Series is a versatile vacuum heat treatment furnace designed for tool and die shops, contract heat treaters, and manufacturing facilities handling diverse workloads:
- Temperature range: 400°C – 1350°C
- Ultimate vacuum: 6.7×10⁻³ Pa
- Quenching: High-pressure gas quench (up to 10 bar) with directional nozzles for uniform cooling
- Temperature uniformity: ±3°C (AMS 2750F Class 2)
- Hot zone: All-metal or graphite, user-configurable
- Chamber sizes: From 200mm × 300mm (lab) to 1200mm × 1500mm (industrial)
- Applications: H13/D2/M2/A2/O1 tool steels, stainless steels, high-speed steels, alloy steels
TQ Series — Vacuum Furnace with Integrated Oil Quenching
- Temperature range: 400°C – 1320°C
- Quenching: Oil quench tank integrated within the vacuum chamber
- Applications: Steels requiring oil quench rates exceeding gas quench capability
- Key feature: Seamless transfer from hot zone to oil bath under vacuum — no atmospheric exposure
TC Series — Vacuum Carburizing Furnace
- Temperature range: 850°C – 1050°C
- Atmosphere: Low-pressure acetylene or propane with pulsed injection
- Applications: Case hardening of gears, bearings, shafts for automotive and aerospace
- Key feature: Uniform case depth with no internal oxidation — superior to atmospheric gas carburizing
Technical Specifications: T Series Heat Treatment Furnace
| Parameter | Standard Range | Optional |
|---|---|---|
| Max Temperature | 1320°C | 1350°C |
| Ultimate Vacuum | 6.7×10⁻³ Pa | 6.7×10⁻⁴ Pa |
| Gas Quench Pressure | 6 bar | 10 bar / 20 bar |
| Temperature Uniformity | ±5°C | ±3°C (AMS 2750F) |
| Heating Rate | Up to 20°C/min | Up to 40°C/min |
| Cooling Rate (6 bar N₂) | From 1000°C to 200°C in 12 min | Depends on load mass |
| Control System | Siemens PLC + Touch HMI | SCADA / MES ready |
| Hot Zone Material | Graphite felt + graphite rod | Molybdenum + stainless steel |
Real-World Applications: Vacuum Heat Treatment Case Studies
Case 1: Tool Steel Hardening — Mold & Die Manufacturer in Turkey
A Turkish mold-making company producing injection molds for automotive interior parts needed a reliable vacuum heat treatment furnace manufacturer to replace their outdated salt bath line. HaoYue delivered a T Series furnace with 10 bar gas quenching. Results after 12 months of operation:
- H13 steel hardness consistently at 48–52 HRC with zero decarburization
- D2 steel achieved 60–62 HRC with minimal distortion — mold dimensions remained within 0.02mm tolerance
- Energy consumption reduced by 45% compared to salt bath
- Operator safety dramatically improved — no hazardous salt handling or disposal
- Production throughput increased by 60% with automated recipe control
Case 2: Vacuum Annealing of Stainless Steel Coils — Egyptian Manufacturer
An Egyptian stainless steel processing company needed bright annealing of 304 and 316L strip coils. HaoYue provided a continuous vacuum annealing furnace with inert gas cooling. Results:
- Bright, oxide-free finish on all coils — no pickling or mechanical cleaning required
- Mechanical properties met ASTM A240 and EN 10088 standards
- Annual throughput of 3,000+ tons with consistent quality
Case 3: Solution Treatment of Aerospace Aluminum Alloys — Asian OEM
An Asian aerospace component manufacturer needed a vacuum heat treatment furnace for solution treatment and aging of 7075 and 6061 aluminum components. HaoYue custom-engineered a low-temperature vacuum furnace with uniform forced gas quenching:
- Temperature uniformity of ±2°C across the entire work zone
- Quench rate controllable from 2°C/s to 50°C/s to optimize mechanical properties
- All batches passed AMS 2770 and customer-specific specifications
Factory Capabilities & Production Strength
HaoYue Group's 25,000 m² manufacturing facility in Nantong, China is one of the most comprehensive vacuum furnace production bases in the industry, with dedicated production lines for heat treatment furnaces.
- Annual capacity: 500+ vacuum furnace systems
- Specialized team: 45+ R&D engineers including metallurgists and material scientists
- Certifications: ISO 9001:2015, ISO 14001, CE, ASME design capability
- Testing lab: In-house metallography laboratory for process validation
- Temperature calibration: AMS 2750F-compliant SAT and TUS testing on every furnace
- Global installations: 500+ systems across 30+ countries
Why Choose HaoYue as Your Vacuum Heat Treatment Furnace Manufacturer?
- Process specialization: Deep expertise in tool steel, stainless steel, and alloy heat treatment
- AMS 2750F compliance: All furnaces tested and certified to aerospace pyrometry standards
- Full automation: Recipe-based operation with cycle logging, data export, and remote monitoring
- Custom heat treatment cycles: Our metallurgists can help develop and validate your specific heat treatment profiles
- After-sales support: 24/7 technical support, spare parts inventory, on-site service, and preventive maintenance
- Factory-direct pricing: Competitive pricing without distributor markups
Customization Options
- Hot zone selection: Graphite for general-purpose or all-metal (molybdenum) for clean, carbon-free processing
- Quench system: High-pressure gas (6–20 bar), directional nozzle arrays, or oil quench
- Chamber size: From 200mm × 300mm laboratory units to 1500mm × 2000mm production systems
- Heating elements: Graphite rods, molybdenum wire, or silicon carbide for different temperature ranges
- Automation level: Basic manual through fully automated with MES integration and barcode tracking
- Data collection: Cycle recording, SPC reporting, cloud-based monitoring, and audit-ready documentation
Vacuum Heat Treatment Process Overview
- Loading: Components are loaded onto heat-resistant alloy fixture trays or into baskets
- Evacuation: Chamber evacuated to high vacuum (10⁻² – 10⁻³ Pa range)
- Preheating: Gradual preheat to ensure uniform temperature distribution and prevent thermal shock
- Austenitization / Heating: Controlled ramp to target temperature with hold for complete phase transformation
- Quenching: High-pressure inert gas (N₂, Ar, He) or oil quench for rapid cooling and microstructure transformation
- Tempering: Controlled reheating to intermediate temperature to achieve target hardness-toughness balance
- Cooling & Unloading: Components cooled to safe handling temperature and removed with clean, oxidation-free surfaces
Each cycle is fully programmable and monitored, with real-time data logging for quality assurance and traceability.
Frequently Asked Questions
Contact HaoYue — Your Trusted Vacuum Heat Treatment Furnace Manufacturer
Ready to upgrade your heat treatment capabilities? Contact us for a free consultation, process recommendation, and equipment quotation.
HaoYue Group
- Tel/WhatsApp: +86-180-6810-6501
- Email: lyle@haoyue-group.com
- Website: www.vacuum-sintering.com
- Factory: No.1, Jufeng Industrial Park, Tongzhou District, Nantong, Jiangsu, China
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