Nickel-Chromium-Tungsten Alloy Barrel Liner with High Hardness and Customized Alloy for Twin Screw Elements

The liner is positioned inside the barrel adjacent to screw elements, making its inner wall particularly susceptible to wear and corrosion from processed materials.

Our proprietary OS02H Nickel-Chromium-Tungsten alloy represents a significant advancement in liner durability:

• Enhanced Cr content improves oxidation resistance, high temperature stability, and corrosion resistance
• CrB additives (microhardness 4000-4200DPH) significantly increase alloy strength
• Optimized WC content prevents segregation issues common in traditional alloys
• Hard phase increased to approximately 50% compared to conventional 10-30%
• Rockwell hardness HRC56-64 (typically controlled at HRC58-60)
• Service life 3-5 times longer than WR5 or CPM10V materials

Our spray welding process replaces traditional sintering, achieving superior densification and extending product lifespan 3-5 times.

Our barrel systems feature:

• Outer barrel construction: Carbon steel
• Inner liner material: NiCrW alloy with oval flat corner design
• Available sizes: 27-87mm standard range

We provide customized screw elements tailored to your specific material requirements:

• Single metal liner
• Bimetallic compound liner
• Sintered process composite liner
• Spray welding process composite liner

• 600°C temperature resistance
• ≥1.8mm alloy layer thickness
• 57-64HRC hardness range
• Spray welding process ensures superior density

Our 3000+ square meter facility features:

• Complete production process from R&D to testing
• 6 technical specialists and 40+ skilled workers
• Advanced equipment imported from Taiwan and Germany

• Material Innovation: Proprietary alloy development ensures optimal performance
• Process Optimization: Spray welding replaces sintering for 3-5x lifespan improvement
• Design Enhancement: Oval flat corner geometry extends service life