Continuous Mesh Belt Type Powder Metallurgy Sintering Furnace

What Is Powder Metallurgy Sintering Furnace?

Powder Metallurgy Sintering Furnace is a dedicated continuous atmosphere heat treatment equipment for powder metallurgy compacts. It combines degreasing, preheating, high-temperature sintering and sealed slow cooling into one automatic production line, transforming loose metal powder blanks into high-density, high-strength and bright finished metal components.

Different from traditional batch furnaces, our sealed muffle mesh belt design adopts stable inert atmosphere protection (nitrogen, nitrogen-hydrogen mixture or ammonia decomposition gas). It thoroughly removes internal lubricants and binders, completes metal particle recrystallization and densification under oxygen-free conditions. Finished PM parts feature uniform density, stable hardness, no oxidation or carbon loss, requiring no secondary polishing or repairing.

Widely applicable for iron-based, copper-based, stainless steel and alloy PM parts, this continuous sintering line solves the defects of unstable batch quality, low efficiency and high defective rate of intermittent furnaces, serving as standard equipment for modern powder metallurgy mass production.

1.All-in-One Processing: Integrates degreasing and sintering in one line, avoiding secondary contamination and improving production efficiency greatly.

2.Sealed Muffle Heating: Isolates heating elements from workpieces and atmosphere, no dust falling, ensuring ultra-clean sintering surface.

3.Zero Decarburization & Anti-Oxidation: Micro-positive airtight structure blocks external oxygen, effectively protecting carbon content and mechanical properties of iron-based parts.

4.Stable Batch Quality: Balanced uniform temperature field prevents local overheating or insufficient sintering, ensuring identical density and hardness for every batch.

5.24H Unmanned Operation: Fully automatic mesh belt conveying realizes uninterrupted continuous production for standardized large-volume PM manufacturing.

The whole furnace runs under stable micro-positive protective atmosphere, completing standardized sintering through five independent sealed zones:

1. Feeding & Pre-Degreasing Zone

Low-temperature preheating volatilizes and decomposes internal lubricants and binders of PM compacts. The built-in waste gas purification system eliminates oil fume and organic exhaust, avoiding carbon spots and meeting global environmental standards.

2. Medium-Temperature Degreasing Transition Zone

Further removes residual organic impurities inside blanks. Gradual temperature rise prevents cracking and deformation caused by rapid heating, ensuring clean internal structure for high-quality sintering.

3. High-Temperature Sintering Zone

Multi-zone PID precise temperature control provides stable high-temperature environment. Metal powder particles realize diffusion, recrystallization and bonding to achieve densification and strength promotion, with zero oxidation throughout the process.

4. Constant Temperature Soaking Zone

Stable constant temperature eliminates internal stress, balances internal and external density, stabilizes mechanical properties and avoids post-sintering size deviation and deformation.

5. Sealed Atmosphere Cooling Zone

PM parts cool slowly under oxygen-free protective atmosphere, completely isolated from outside air. Finished products maintain uniform bright surface without oxidation, discoloration or rust.

1.One-Stop Degreasing & Sintering Completes organic degreasing and high-temperature sintering in one continuous line, no secondary processing needed, eliminating intermediate pollution and improving product qualification rate.

2.Zero Oxidation & Zero Decarburization Fully sealed oxygen-free environment stably protects carbon content of iron-based parts, ensuring consistent hardness, wear resistance and mechanical properties.

3.Uniform Density & Stable Batch Quality Balanced multi-zone temperature field ensures uniform heating, solving traditional defects of uneven density, poor flatness and unstable performance.

4.Low Operating Cost Optimized airtight muffle structure reduces gas loss; full fiber insulation cuts power consumption, achieving lower gas & electricity cost than traditional sintering equipment.

5.No Deformation & High Precision Gradual heating and sealed slow cooling eliminate thermal stress, effectively preventing cracking and deformation of thin-walled and precision PM parts.

6.Fully Automatic Unmanned Production Preset professional sintering curves for diverse materials, realizing automatic feeding, sintering and discharging to save labor cost and reduce human error.

7.Durable & Low Maintenance Heating elements are isolated from corrosive gas and powder dust, slowing aging. Core components feature long service life and low downtime maintenance frequency.

8.Full Customization Support Customizable furnace size, max temperature, belt speed and load capacity, providing tailored solutions for all types of powder metallurgy sintering processes.

This sintering furnace is widely used for high-precision powder metallurgy component production requiring high density, stable performance and clean bright surface.

Applicable Materials

Iron-based powder, copper-based powder, stainless steel powder, iron-copper alloy powder, magnetic alloy powder and other composite PM materials

Application Industries

1.Automotive PM Parts: Engine gears, valve seats, piston rings, brake parts, transmission components and auto precision structural parts with high wear resistance requirements.

2.Home Appliance & Electrical Components: Motor rotors, stators, fan gears, switch contacts and precision electrical PM parts with stable conductivity and mechanical matching performance.

3.Precision Hardware & Tools: Hardware fasteners, tool accessories and stainless steel structural parts, achieving bright surface and high toughness without secondary polishing.

4.Electronic & Communication Parts: Miniature connectors, conductive terminals, sensor structural parts and micro PM components requiring ultra-high dimensional accuracy.

5.New Energy & Magnetic Materials: Soft magnetic alloy parts and new energy conductive structural parts, stabilizing magnetic and electrical properties for high-standard new energy equipment.

6.Industrial Mechanical Parts: Equipment gears, bearings, sliding blocks and wear-resistant structural parts, improving component density, wear resistance and service life.

Supported Processes

Powder blank degreasing, high-temperature sintering, densification forming, stress relief annealing, bright sintering, oxidation-free and decarburization-free sintering

Inlet conveyor table (2 m) + Preheating/heating zone (3.0 m) + High-temperature heating zone (6.0 m) + Cooling unit (5.0 m) + Outlet conveyor table (1.5 m) ≈ 17.5 m

Q1: What are the advantages of continuous mesh belt furnace over batch sintering furnace?

A1: Traditional batch furnaces feature discontinuous production, uneven temperature and unstable batch quality with high defective rate. Our continuous mesh belt furnace integrates degreasing and sintering, with stable sealed atmosphere and uniform temperature field, ensuring consistent part density, hardness and surface finish, with higher efficiency and lower production cost.

Q2: What atmosphere is suitable for PM sintering?

A2: Pure nitrogen is cost-effective for conventional iron-based and copper-based parts. Nitrogen-hydrogen mixed gas or ammonia decomposition gas is recommended for high-brightness stainless steel PM components. We provide customized economical atmosphere solutions based on your products.

Q3: Can it solve decarburization and blackening of iron-based PM parts?

A3: Yes. The fully sealed micro-positive pressure structure completely isolates external oxygen, effectively preventing oxidation and decarburization during high-temperature sintering, ensuring uniform color, stable carbon content and consistent mechanical performance.

Q4: Can it sinter thin fragile blanks without deformation?

A4: Yes. Gradual temperature rise and slow sealed cooling avoid thermal stress. The smooth flat mesh belt supports blanks stably, preventing cracking and deformation of thin-walled and precision PM parts.

Q5: Does the furnace meet EU export standards?

A5: Yes. The whole machine has complete CE certification, equipped with explosion-proof valves, over-temperature protection and standard waste gas purification device, fully complying with EU safety and environmental regulations.

Q6: What is your after-sales policy?

A6: We offer 12-month full machine warranty and lifelong free technical support. Core spare parts are supplied at factory cost after warranty. Overseas on-site installation, commissioning and operator training services are available.