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Threaded Rod Bolts
QS Fastener: Threaded Rod Bolts
Name: Threaded Rod Bolts
Application: Bolts are Essential in Shipbuilding, Dock Construction and Offshore Platform Setup
Length: 70mm
Material: ASTM A193 B7M
Anti-corrosion Treatment: Xylan Coated
Size: 1/2 Inch
Thread: 13 UNC
Application: Bolts are Essential in Shipbuilding, Dock Construction and Offshore Platform Setup
Length: 70mm
Material: ASTM A193 B7M
Anti-corrosion Treatment: Xylan Coated
Size: 1/2 Inch
Thread: 13 UNC
Quantity
These Threaded Rod Bolts are specifically designed for shipbuilding, dock construction, and offshore platform equipment. Manufactured from ASTM A193 B7M high-strength alloy steel with Xylan coating, they offer 300% improved salt spray corrosion resistance. The standard 1/2-inch diameter, 13 UNC threaded Threaded Rod Bolts provide exceptional gripping force and vibration-resistant loosening prevention. The optimized 70mm length balances structural strength with installation convenience, making them an industrial-grade fastening solution for critical load-bearing components.
Forging and Forming Processes of Threaded Rod Bolts
The superior performance of ASTM A193 B7M Threaded Rod Bolts stems not only from premium alloy composition but also from advanced forging and forming technologies. Hot forging and cold thread rolling are particularly crucial for optimizing material microstructure and enhancing mechanical properties.
The superior performance of ASTM A193 B7M Threaded Rod Bolts stems not only from premium alloy composition but also from advanced forging and forming technologies. Hot forging and cold thread rolling are particularly crucial for optimizing material microstructure and enhancing mechanical properties.
1. Hot Forging Process: Optimizing Metal Flow Lines to Enhance Threaded Rod Bolts' Fatigue Resistance
(1) Process Principle
Threaded Rod Bolts undergo hot forging at 850°C~1150°C, where B7M alloy steel bars are plastically deformed under pressure to form preliminary shapes. This temperature range corresponds to the material's austenite phase, ensuring excellent metal ductility.
(1) Process Principle
Threaded Rod Bolts undergo hot forging at 850°C~1150°C, where B7M alloy steel bars are plastically deformed under pressure to form preliminary shapes. This temperature range corresponds to the material's austenite phase, ensuring excellent metal ductility.
(2) Key Control Points
- Precise temperature control: Initial forging temperature ≤1150°C for Threaded Rod Bolts
- Deformation rate: Multi-stage progressive forming aligns metal flow lines with stress direction
- Die design: Closed-die forging improves material utilization to >90%
- Precise temperature control: Initial forging temperature ≤1150°C for Threaded Rod Bolts
- Deformation rate: Multi-stage progressive forming aligns metal flow lines with stress direction
- Die design: Closed-die forging improves material utilization to >90%
(3) Performance Advantages
Hot-forged Threaded Rod Bolts develop uniform fibrous flow line structures internally, with this directional grain boundary arrangement significantly improving fatigue strength and reducing crack propagation rates under cyclic loading.
Hot-forged Threaded Rod Bolts develop uniform fibrous flow line structures internally, with this directional grain boundary arrangement significantly improving fatigue strength and reducing crack propagation rates under cyclic loading.
2. Cold Thread Rolling: Precision Assurance for Threaded Rod Bolts
(1) Process Principle
Threaded Rod Bolts' cold thread rolling occurs at room temperature, where high-speed rotating dies apply radial pressure to plastically deform the shank into threaded form.
(1) Process Principle
Threaded Rod Bolts' cold thread rolling occurs at room temperature, where high-speed rotating dies apply radial pressure to plastically deform the shank into threaded form.
(2) Process Parameters
- Rolling force: Threaded Rod Bolts typically require 200-400 kN
- Die accuracy: Complies with ANSI B1.1 Class 2 standards
- Surface pretreatment: Spheroidizing annealing required pre-rolling
- Rolling force: Threaded Rod Bolts typically require 200-400 kN
- Die accuracy: Complies with ANSI B1.1 Class 2 standards
- Surface pretreatment: Spheroidizing annealing required pre-rolling
(3) Performance Enhancement Mechanisms
Threaded Rod Bolts gain through cold rolling:
- Work hardening effect: 15% surface hardness increase
- Residual compressive stress: -200~-300 MPa at thread roots
- Flow line continuity: 20% higher load capacity vs. cut threads
Threaded Rod Bolts gain through cold rolling:
- Work hardening effect: 15% surface hardness increase
- Residual compressive stress: -200~-300 MPa at thread roots
- Flow line continuity: 20% higher load capacity vs. cut threads
Synergistic Effects in Threaded Rod Bolts Manufacturing
The combination of hot forging and cold rolling enables Threaded Rod Bolts to achieve:
- Macroscopic structural integrity (hot forging optimizes overall flow lines)
- Microscopic surface strengthening (cold rolling enhances thread durability)
The combination of hot forging and cold rolling enables Threaded Rod Bolts to achieve:
- Macroscopic structural integrity (hot forging optimizes overall flow lines)
- Microscopic surface strengthening (cold rolling enhances thread durability)
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