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Special Fixture

The Special Fixture composite material rack is a high-performance composite material structure designed specifically for high-temperature heat treatment processes. Made of carbon-carbon composite (C/C) material, it offers excellent thermodynamic properties and mechanical strength, making it suitable for a variety of high-temperature environments, particularly those operating at temperatures exceeding 2500°C. Its unique structural design and material properties make it an indispensable tool in the heat treatment industry.

Product Features
1. Three-tier Design: The three-tier structure provides ample storage space for workpieces of varying numbers and sizes. Each tier is secured by sturdy connectors, ensuring overall structural stability and security. The spacing between tiers can be flexibly adjusted to meet the storage and support requirements of various workpieces.
2. Grid Layout: The grid-like layout of each tier ensures uniform load distribution during workpiece storage, preventing structural deformation caused by local overload. The grid design facilitates air circulation, improves heat dissipation during heat treatment, and ensures uniform heating of workpieces in high-temperature environments.
3. High-Strength Support: The entire rack is constructed of high-strength materials, resulting in a durable frame structure capable of withstanding heavy loads and high-temperature environments. The surface of the grid has been specially treated to have good anti-slip properties, preventing the workpiece from slipping during storage and transportation.

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Type Unit PC70(Short fiber) PC30(Short fiber) CIC(Long fiber) Graphite
Density g/cm3 1.65  1.65  1.7  1.8 
Bending strength MPa 200  200  145  40~80
Bending resistance
coefficient		 GPa 45  50  44  8~12
Compressive strength MPa 210  200  98 
Interlaminar shear
strength		 MPa 17  15  13 
Coefficient of thermal
expansion		 10-6℃ //
--
⊥		 1.3-----10 1.1-----10.5 1.1----8.4 4.5 
Coefficient of heat
conduction		 W/m ·K //
--
⊥		 35--2 65--20 35--3 80~140
Specific heat J/kg-K 720  720  753  750 
Electrical resistivity μQcm 2000  1000  2500  800~1200
For general heat treatment
applications, it covers all heat
treatment process temperatures
(below  2000℃)		 Applications where the
operating temperature
exceeds 2500℃
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ABOUT US
Quality is Our Core Competitiveness
Wuxi Junteng Fanghu Alloy Technology Co., Ltd.
Since 2006, we have been dedicated to designing and manufacturing alloy steel components. We are OEM Special Fixture Suppliers and Special Fixture Factory.
Our primary products include heat treatment fixtures, radiant tubes, furnace rollers, fan blades, furnace rails, wheels, and various other alloy parts for furnaces. We offer technical assistance to customize or optimize your heat treatment fixtures, helping our customers discover cost-effective solutions to enhance the efficiency of their heat treatment operations.
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Heat Treatment Fixture Industry knowledge

What is a heat treatment fixture?

A heat treatment fixture is a supporting, positioning, and securing device designed specifically for use in high-temperature furnaces. It stabilizes the workpiece during the heat treatment process, prevents deformation, and ensures uniform heat flow.

1. Functional Positioning: Provides a reliable loading platform in a variety of furnace types, including vacuum, chamber, push-type, pit-type, and lamp-type furnaces (such as Ipsen, Aichelin, ECM, KGO, NITRIX, AFC, IVA-SCHEMTZ, CODERE, and MATTASA).
2. Structural Features: Utilizing a lost-wax casting process, it achieves a smooth and flat surface. Combined with a patented high-temperature-resistant alloy, it achieves long-term stability in extreme temperature cycling and corrosive environments.
3. Improved Efficiency: Through precise load design, it increases loading capacity, reduces rework due to workpiece movement, and significantly reduces heat treatment batch costs.
What are common heat treatment fixture materials?

High-temperature alloys – Based on the company's proprietary heat-resistant alloy formula, these materials maintain strength above 1200°C and are suitable for vacuum and high-temperature furnaces.

1. Carbon Fiber Reinforced Carbon (CFC) – Considered the industry benchmark in vacuum heat treatment, they offer excellent dimensional stability and significantly reduce workpiece distortion.

2. Refractory Ceramics and High-Temperature Steels – Commonly used in open furnaces or where flame impingement resistance is required, ensuring the fixture itself does not become a source of heat loss.

3. Specialty Coated Steels – Surface carburizing, nitriding, or plasma spraying enhances corrosion resistance and extends service life, making them suitable for oil or salt bath heat treatment environments.

What industries are Wuxi Junteng Fanghu Alloy Casting Co., Ltd.'s heat treatment fixtures primarily used in?

1. Automotive Manufacturing: We provide high-load, low-deformation fixture solutions for carburizing, nitriding, and vacuum heat treatment of engine components, gearboxes, and body structures, meeting the rigidity requirements of high-volume production. 2. Aerospace: Customized high-temperature alloy fixtures are used for high-strength alloy and titanium alloy components to ensure dimensional accuracy under extreme thermal cycles, improving the reliability of critical components.
3. Energy and Heavy Industry: Modular, multi-furnace compatible fixtures are used during the heat treatment of gas turbine blades, boiler pipes, and large castings, enabling rapid changeover and cost control.
4. Mold and Tool Manufacturing: Dedicated support structures are provided for mold heat treatment to prevent cracking or warping caused by thermal stress, extending mold life and improving product quality.