FH® Oil-cooled Heat Treatment Charging Basket for Roller Hearth Furnace

FH® Heat Treatment Basket & Fixture | Engineered for Roller Hearth Furnace (Continuous Carburizing / Hardening)

Key Benefits
1. Roller Hearth Furnace Optimized Bottom
Flat or precision-slotted base with smooth bottom runners – minimizes friction, prevents rocking, and ensures stable tracking on roller tables.

2. High Creep Strength Material (1.4849 / 310S / Custom)
Selected heat-resistant alloys maintain dimensional stability under continuous high-temperature cycling – no progressive sagging or binding.

 3. Anti-Carburization Performance
Special alloy composition and pre-oxidation treatment reduce carbon penetration and metal dusting – extends service life in rich atmosphere zones.

4. Thermal Fatigue Resistant
Engineered to withstand repeated heating (850–1050°C) and cooling cycles without cracking – ideal for continuous furnace lines.

5. Customizable for Any Roller Pitch & Width
Basket length, width, height, and runner spacing designed to match your roller center distance and furnace internal width.

Technical Specifications

Why Choose FH® Roller Hearth Furnace Heat Treatment Baskets?
1. Designed for Continuous Furnace Demands
Roller hearth furnaces run 24/7 with long hot zones, heavy loads, and aggressive carburizing atmospheres. Ordinary baskets sag, bind on rollers, or crack from thermal fatigue. FH® baskets are specifically engineered for these conditions.

2. Material Selection Guide

• 1.4849 – Maximum creep strength (1050°C), best for heavy loads and long carburizing zones
• 310S – Cost-effective for lower temperatures (≤950°C) or less aggressive atmospheres
• Custom Ni-base – For extreme conditions (1100°C+ or severe metal dusting)

3. Continuous Production Reliability

• Every FH® basket is inspected for:
• Flatness (≤2 mm over 1000 mm)
• Runner alignment (±1 mm)
• Weld integrity (dye penetrant or X-ray on request)
  
  

Applications

• Continuous roller hearth carburizing lines
• Roller hearth hardening furnaces
• Carbonitriding
• Bearing ring hardening (direct roller transport)
• Automotive gears, shafts, rings, and fasteners

Material Grade Table:

Genuine Photos of FH® Heat Treatment Baskets

Ordering Process

1. Provide roller pitch, furnace internal width, and part dimensions
2. Share load weight per basket and max operating temperature
3. FH® engineers propose bottom runner layout + basket structure
4. Confirm material grade (1.4849 / 310S / custom)
5. Production: 10–20 working days
6. Delivery includes: MTC, flatness inspection report, first-use guide
   
   

FAQ:

Q1: Why can't I use a standard basket in a roller hearth furnace?
A: Standard baskets often have uneven bottoms, sharp edges, or insufficient creep strength. Over time they sag, causing rocking, roller binding, and even furnace jams. FH® roller hearth baskets feature precision runners, reinforced bases, and high-creep alloys to maintain flatness and smooth tracking.

Q2: What material do you recommend for a carburizing roller hearth furnace at 950°C?
A: For 980°C continuous with carburizing atmosphere, we recommend 1.4849 for maximum life (400–500 cycles). If budget is a priority and temperatures are stable at ≤920°C, 310S is acceptable (250–350 cycles). We can provide a lifecycle cost comparison to help you decide.

Q3: How do I clean and maintain the heat treatment baskets?
A: Light bead blasting (glass beads, ≤0.3 MPa) every 50–80 cycles to remove carbon soot. Check bottom runners for wear or distortion every 100 cycles. Do not use carbon steel brushes or heavy grinding on runner surfaces – they must remain smooth for roller contact.

Q4: Will the basket warp or sag over time?
A: Minimal. FH® baskets are designed with FEA-optimized ribs and reinforced runners. Typical creep: <3 mm sag per 1000 mm length after 300 cycles. Overloading or exceeding recommended temperature accelerates warping. We recommend periodic flatness checks.

Q5: Can you custom-make baskets for an existing roller hearth furnace line?
A: Yes – this is our specialty. We need:

• Roller center-to-center pitch
• Furnace internal width
• Part size and weight per basket
• Operating temperature and atmosphere
  

We will then design a basket with correct runner spacing, overall dimensions, and reinforcement.

Q6: What is your warranty and do you provide material certificates?
A: 12 months against manufacturing defects (weld cracks, material flaws). Normal creep, surface carburization, and runner wear are considered wear – not covered. Every basket comes with a material test certificate (MTC) for full traceability.