1.4859 HK Alloy High-Temperature Water-Cooled Pusher Tray Furnace Heat Treatment Fixtures

Pusher tray furnace Heat Treatment Fixtures & Toolings

Pusher tray furnace fixtures are the specialized tooling systems for pusher-type heat treatment furnaces. They represent a classic category of continuous furnace fixtures, but their design, application, and maintenance are highly specialized, playing a central role, especially in heavy-duty carburizing and quenching processes.

The core of pusher tray furnace Fixtures is the "tray-rail" friction pair system. The quality of its design directly determines the production line's operational smoothness, energy consumption, maintenance costs, and even product quality.

I. Core Concept and Operating Principle
1. Operating Principle: Inside a pusher furnace, trays (boats/carriers) loaded with workpieces rest on fixed rails. A hydraulic or mechanical pusher advances them intermittently, step-by-step, according to a set cycle. The trays sequentially pass through process zones such as preheat, heat, soak, and quench/slow cool.

2. Fixture Composition: Primarily consists of the trays that carry the workpieces and the rail system that supports and guides the tray movement. Together, they form an inseparable high-temperature tribological system.

3. Core Challenge: This system must solve three major problems under extreme operating conditions of high temperature (up to 950°C), heavy load (several tons per tray), and long-term continuous operation: high-temperature creep deformation, oxidation/carburization, and frictional resistance and wear.

II. Design Core: Reducing Friction and Preventing Jamming
This is the soul of pusher furnace fixture design. Excessive friction leads to: drastic increase in pusher load, unsynchronized tray movement, or even "pile-up" accidents.

1. Optimize the Friction Pair:

• Material Pairing: Classic pairs include Inconel 600 feet + RA330 rails or ceramic-coated feet + metal rails.
• Surface Condition: Contact surfaces should be smooth but not mirror-finished (some roughness helps form a protective oxide film lubricant).

2. Reduce Contact Area:

• Design feet as narrow strips or discrete pads rather than full-face contact.
• Transverse grooves are machined on the bottom surface of the support feet to reduce both weight and contact area.

3. Account for Thermal Expansion Compensation:

• The trays and guide rails experience significant thermal expansion along the length direction during operation. In the design, expansion clearances must be reserved to ensure that the trays can still slide freely when expanded, without mutual extrusion or jamming against the furnace body.

4. Balance Lightweighting and High Strength:

Reinforce key load-bearing areas (feet, frame) and use grids to reduce weight in non-critical areas (tray center) to lower pushing resistance and energy consumption.

III. Typical Application

• Heavy-Duty Gear Carburizing & Quenching Lines: Carrying large transmission gears.
• Bearing Ring Continuous Heat Treatment Lines: Processing high volumes of bearing races.
• Forging Blank Isothermal Normalizing Lines.

IV. Summary
Pusher tray furnace heat treatment fixture is not a simple container, but a precise, dynamic high-temperature mechanical system. It serves as the physical execution unit that translates continuous heat treatment process theory into stable, efficient, and large-scale production. The core design contradiction lies in the need to be robust enough to withstand high-temperature heavy loads while remaining smooth enough to be easily pushed forward.
An excellent pusher tray furnace heat treatment fixture system reflects a profound understanding of materials science (high-temperature alloys), tribology, structural mechanics, and thermal expansion control. Investing in and meticulously maintaining this system is the cornerstone of ensuring that the pusher tray furnace production line achieves "high uptime, low maintenance costs, and high-quality output". It can be said that "smooth movement of trays guarantees smooth production".

Material Grade Table:

FAQ:

Q: How to give inquiry ?

A: Step 1, please give us some details about your furnace,operating temperature,cooling method,loading weight of your furnace and so on;

Step 2, it's better to provide 3D drawings;

Step 3, when we have enough details, we may design the products drawings and quote accordingly;

Q: When can I get the price?

A: We usually quote within 24 hours after we get your inquiry(Except weekend and holidays). If you are very urgent to get the price, please email us or contact us in other ways so that we can offer you a quote.

Q: When will make delivery ? /What is the delivery Time?

A: -Sample Order: 35 days after receipt of the full payment.

-Stock Order: 10 days after receipt of the full payment

-OEM Order: 30 days after receipt of the deposit.

Q: What's your after-sales service?

A: 1 year warranty for all kinds of products;

If you find any defective accessories first time, we will give you the new parts for free to replace in the next order, as an experienced manufacturer, you can rest assured of the quality and after-sales service.

Q: What's your payment condition?

A: T/T

Payment<=USD10000, 100% in advance. Payment>USD10000, 50% T/T in advance ,balance before shipment.

Q: What is the shipping method?

A: Transported by DHL, UPS, EMS, Fedex,Air freight, sea freight or train freight.