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Teflon Coated Threaded Rod
QS Fastener: Teflon Coated Threaded Rod
Name: Teflon Coated Threaded Rod
Length: 100mm
Feature: Fully Thread Stud
Size: M12
Surface Process: Teflon Coated Green
Type: Metric Thread
Class: 6G
Standard: DIN 976
Length: 100mm
Feature: Fully Thread Stud
Size: M12
Surface Process: Teflon Coated Green
Type: Metric Thread
Class: 6G
Standard: DIN 976
Quantity
Teflon Coated Threaded Rod, as a benchmark for high-performance fasteners, has its reliability directly determined by thermal processing and forming technologies. This M12 fully threaded stud (100mm length) utilizes high-strength A193 B16 material, complies with DIN 976 standard, and maintains 6G precision grade. Its green Teflon coating delivers exceptional corrosion/chemical resistance, making it ideal for demanding environments like chemical processing and marine applications.
Thermal Processing and Forming Technology for Teflon Coated Threaded Rod
1. Hot Rolling and Forging Process
The base material of Teflon Coated Threaded Rod is A193 B16 alloy steel, with initial thermal processing optimizing microstructure through hot rolling or forging.
1. Hot Rolling and Forging Process
The base material of Teflon Coated Threaded Rod is A193 B16 alloy steel, with initial thermal processing optimizing microstructure through hot rolling or forging.
Heating Phase:
Billets are heated to 1100-1200°C for complete austenitization. For large-diameter bars (>100mm), stepped heating prevents thermal stress.
Billets are heated to 1100-1200°C for complete austenitization. For large-diameter bars (>100mm), stepped heating prevents thermal stress.
- Hot Rolling/Forging Deformation:
- Hot rolling: Multi-pass reduction (≥30% deformation) eliminates casting segregation.
- Forging: Critical fasteners like Teflon Coated Threaded Rod use closed-die forging (≥4:1 reduction ratio), enhancing transverse impact toughness.
- Hot rolling: Multi-pass reduction (≥30% deformation) eliminates casting segregation.
- Forging: Critical fasteners like Teflon Coated Threaded Rod use closed-die forging (≥4:1 reduction ratio), enhancing transverse impact toughness.
- Controlled Cooling (TMCP):
Air/mist cooling (20-50°C/s) achieves fine-grained structure (ASTM 8-10), ensuring strength-toughness balance in Teflon Coated Threaded Rod.
Air/mist cooling (20-50°C/s) achieves fine-grained structure (ASTM 8-10), ensuring strength-toughness balance in Teflon Coated Threaded Rod.
2. Thread Forming Process
Threading for Teflon Coated Threaded Rod meets ISO 6G precision through cold rolling or grinding.
Threading for Teflon Coated Threaded Rod meets ISO 6G precision through cold rolling or grinding.
(1) Cold Rolling (Thread Rolling):
- Advantage: Continuous metal fibers increase Teflon Coated Threaded Rod's thread strength by 20-30%.
- Advantage: Continuous metal fibers increase Teflon Coated Threaded Rod's thread strength by 20-30%.
- Key Parameters:
- Rolling force: 200-400 kN; feed rate: 0.5-2 mm/rev
- Sulfur-additive lubricants extend die life beyond 500,000 cycles.
- Rolling force: 200-400 kN; feed rate: 0.5-2 mm/rev
- Sulfur-additive lubricants extend die life beyond 500,000 cycles.
(2) Precision Grinding (Thread Grinding):
- Applied to 12 mm Threaded Rod A193 B16 for hardened thread correction (HRC>35), using CBN wheels (30-50 m/s).
- Laser monitoring ensures pitch error ≤0.005mm.
- Applied to 12 mm Threaded Rod A193 B16 for hardened thread correction (HRC>35), using CBN wheels (30-50 m/s).
- Laser monitoring ensures pitch error ≤0.005mm.
3. Process Impact on Performance
- Cold Rolling: Compressive residual stress (-200 to -400 MPa) triples fatigue life of Teflon Coated Threaded Rod versus cut threads.
- Grinding: Eliminates micro-cracks, maintaining root radius R≥0.125P.
- Cold Rolling: Compressive residual stress (-200 to -400 MPa) triples fatigue life of Teflon Coated Threaded Rod versus cut threads.
- Grinding: Eliminates micro-cracks, maintaining root radius R≥0.125P.
4. Quality Verification
- Metallography: Grain size ≥Grade 8 (ASTM E112).
- Thread Inspection: CMM-measured pitch diameter variation ≤0.01mm.
- Fatigue Testing: Per ASTM E466, Teflon Coated Threaded Rod exceeds 10^7 cycles (R=-1, σ_max=50%σ_b).
- Metallography: Grain size ≥Grade 8 (ASTM E112).
- Thread Inspection: CMM-measured pitch diameter variation ≤0.01mm.
- Fatigue Testing: Per ASTM E466, Teflon Coated Threaded Rod exceeds 10^7 cycles (R=-1, σ_max=50%σ_b).
Conclusion
The synergy of thermal processing and precision forming enables Teflon Coated Threaded Rod to deliver ultimate strength, fatigue resistance, and dimensional stability for extreme applications in nuclear, oil & gas industries.
The synergy of thermal processing and precision forming enables Teflon Coated Threaded Rod to deliver ultimate strength, fatigue resistance, and dimensional stability for extreme applications in nuclear, oil & gas industries.
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