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A bimetallic sleeve extruder barrel is a twin screw barrel structure consisting of two functional layers:
Outer shell: high-strength alloy steel, providing rigidity and structural support
Inner sleeve: wear-resistant alloy material, directly facing the screw and process material
Unlike surface-treated barrels, the alloy sleeve works as a full structural layer, not a thin coating.
This makes bimetallic barrels especially suitable for demanding compounding and granulation applications.
ZHITIAN manufactures bimetallic sleeve barrels based on extensive extrusion field experience and material testing data.
Many customers ask: “Is nitrided steel still enough for modern extrusion?”
In high-output twin screw extruders, materials often contain fillers, fibers, or corrosive additives.
Under these conditions:
Nitrided layers may wear through prematurely
Wear depth is limited by surface treatment thickness
Service life becomes unpredictable
Bimetallic sleeve barrels provide a much thicker functional wear layer, delivering longer and more stable performance under complex working conditions.
The alloy sleeve offers superior resistance to abrasive and adhesive wear, significantly extending barrel service life.
The steel outer shell ensures sufficient rigidity, supporting high torque and continuous operation.
Proper heat treatment and controlled assembly help maintain bore alignment and coaxiality during long-term use.
Different alloy sleeves can be selected based on actual processing requirements, rather than using a single universal solution.
Bimetallic sleeve twin screw barrels are widely used in:
Petrochemical compounding and granulation
Engineering plastics processing
High filler or reinforced material extrusion
Continuous high-load production lines
| Item | Description |
|---|---|
| Barrel Type | Split barrel / Closed barrel |
| Outer Shell Material | Alloy steel |
| Inner Sleeve Material | Wear-resistant alloy |
| Structure | Integral bimetallic sleeve |
| Heat Treatment | Quenching & tempering |
| Customization | Available |
When selecting a bimetallic sleeve barrel, key questions include:
What type of materials are being processed?
Is abrasion, corrosion, or combined wear the main concern?
What is the expected service life and operating load?
ZHITIAN provides material and structure recommendations based on real extrusion conditions rather than generic specifications.
Bimetallic sleeve barrels focus on overall structural durability and thick wear layers
Laser cladding barrels allow localized reinforcement in high-wear zones
The optimal choice depends on processing materials, wear distribution, and maintenance strategy.
ZHITIAN is a professional manufacturer of twin screw extruder barrels, screw elements, and gearboxes.
We do not simply supply components—we focus on material selection, process control, and long-term reliability.
Each bimetallic sleeve barrel is produced with:
Strict heat treatment standards
Controlled assembly processes
Manufacturing experience accumulated from global extrusion applications
Which industries are bimetallic barrels suitable for?
They are suitable for plastics, petrochemical, chemical, and high-wear compounding industries.
Can bimetallic barrels be customized?
Yes. ZHITIAN offers customization based on machine size, material type, and operating conditions.
Is a bimetallic barrel always better than nitrided steel?
Not always. For mild conditions, nitrided barrels may be sufficient. For demanding applications, bimetallic barrels offer better long-term value.
Bimetallic sleeve extruder barrels provide a balanced solution between wear resistance, mechanical strength, and long-term dimensional stability in twin screw extrusion.
A bimetallic sleeve extruder barrel is a twin screw barrel structure consisting of two functional layers:
Outer shell: high-strength alloy steel, providing rigidity and structural support
Inner sleeve: wear-resistant alloy material, directly facing the screw and process material
Unlike surface-treated barrels, the alloy sleeve works as a full structural layer, not a thin coating.
This makes bimetallic barrels especially suitable for demanding compounding and granulation applications.
ZHITIAN manufactures bimetallic sleeve barrels based on extensive extrusion field experience and material testing data.
Many customers ask: “Is nitrided steel still enough for modern extrusion?”
In high-output twin screw extruders, materials often contain fillers, fibers, or corrosive additives.
Under these conditions:
Nitrided layers may wear through prematurely
Wear depth is limited by surface treatment thickness
Service life becomes unpredictable
Bimetallic sleeve barrels provide a much thicker functional wear layer, delivering longer and more stable performance under complex working conditions.
The alloy sleeve offers superior resistance to abrasive and adhesive wear, significantly extending barrel service life.
The steel outer shell ensures sufficient rigidity, supporting high torque and continuous operation.
Proper heat treatment and controlled assembly help maintain bore alignment and coaxiality during long-term use.
Different alloy sleeves can be selected based on actual processing requirements, rather than using a single universal solution.
Bimetallic sleeve twin screw barrels are widely used in:
Petrochemical compounding and granulation
Engineering plastics processing
High filler or reinforced material extrusion
Continuous high-load production lines
| Item | Description |
|---|---|
| Barrel Type | Split barrel / Closed barrel |
| Outer Shell Material | Alloy steel |
| Inner Sleeve Material | Wear-resistant alloy |
| Structure | Integral bimetallic sleeve |
| Heat Treatment | Quenching & tempering |
| Customization | Available |
When selecting a bimetallic sleeve barrel, key questions include:
What type of materials are being processed?
Is abrasion, corrosion, or combined wear the main concern?
What is the expected service life and operating load?
ZHITIAN provides material and structure recommendations based on real extrusion conditions rather than generic specifications.
Bimetallic sleeve barrels focus on overall structural durability and thick wear layers
Laser cladding barrels allow localized reinforcement in high-wear zones
The optimal choice depends on processing materials, wear distribution, and maintenance strategy.
ZHITIAN is a professional manufacturer of twin screw extruder barrels, screw elements, and gearboxes.
We do not simply supply components—we focus on material selection, process control, and long-term reliability.
Each bimetallic sleeve barrel is produced with:
Strict heat treatment standards
Controlled assembly processes
Manufacturing experience accumulated from global extrusion applications
Which industries are bimetallic barrels suitable for?
They are suitable for plastics, petrochemical, chemical, and high-wear compounding industries.
Can bimetallic barrels be customized?
Yes. ZHITIAN offers customization based on machine size, material type, and operating conditions.
Is a bimetallic barrel always better than nitrided steel?
Not always. For mild conditions, nitrided barrels may be sufficient. For demanding applications, bimetallic barrels offer better long-term value.
Bimetallic sleeve extruder barrels provide a balanced solution between wear resistance, mechanical strength, and long-term dimensional stability in twin screw extrusion.
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