The Asphalt Paver Screed Plate Bracket is a critical mounting component that secures the screed plate to the paver’s tamper and vibration system. Operating in continuous contact with 150–170°C hot asphalt aggregate, this bracket must maintain structural integrity under thermal stress, vibration, and abrasive wear. Ningbo Ruican manufactures this component using ZG35CrMo cast steel through Investment Casting, delivering the complex bracket geometry, mounting precision, and wear resistance required by leading asphalt paver OEMs. The integrated CNC MACHINING process ensures that screed plate mounting surfaces achieve flatness within 0.05mm, critical for pavement smoothness.
Material Specifications
| Parameter | Specification |
|---|---|
| Material Grade | ZG35CrMo (Cast Low-Alloy Steel) |
| Tensile Strength | ≥ 590 MPa |
| Yield Strength | ≥ 390 MPa |
| Elongation | ≥ 12% |
| Impact Toughness | ≥ 27 J (at -20°C) |
| Hardness | 180–220 HB |
| Heat Treatment | Quench & Temper (860°C oil quench, 560°C temper) |
| Surface Finish | Ra 6.3 µm (as-cast), Ra 3.2 µm (machined) |
| Dimensional Tolerance | CT7 (ISO 8062) |
| Weight Range | 4.0–15.0 kg |
Manufacturing Process
- Wax Pattern Injection: Compound die for complex bracket geometry with internal recesses
- Shell Building: 6–8 layer ceramic shell with mullite stucco for thermal shock resistance
- Dewaxing & Firing: Autoclave dewaxing, shell firing at 1000°C
- Pouring: ZG35CrMo cast steel poured at 1580–1620°C
- Knockout & Cleaning: Shell removal, cutoff, grinding
- Heat Treatment: Quench at 860°C (oil), temper at 560°C for tempered sorbite structure
- CNC Machining: Milling of mounting surfaces (flatness 0.05mm), drilling of bolt holes
- Hardfacing (Optional): Tungsten carbide overlay on wear surfaces per customer request
- Inspection: Dimensional CMM, magnetic particle testing, hardness verification
Key Features
- High-Temperature Strength: ZG35CrMo maintains mechanical properties at 200°C operating temperature without creep deformation
- Wear Resistance: Quenched and tempered to 180–220 HB, with optional WC hardfacing extending service life by 3x
- Precision Mounting: CNC-machined surfaces achieve 0.05mm flatness, ensuring uniform screed plate contact for smooth pavement
- Vibration Fatigue Resistance: Tempered sorbite microstructure absorbs vibration energy, preventing crack initiation at mounting bosses
- Complex Geometry: Investment casting enables internal cooling channels and ribbed reinforcing without secondary fabrication
- Full Traceability: Heat number tracking, mechanical test certificates (3.1 EN 10204)
Application Fields
- Asphalt paver screed systems (Vögele, Dynapac, Bomag compatible)
- Tamper bar mounting brackets
- Screed extension brackets
- Auger flighting support brackets
- Compaction plate mounting systems
Why Choose Ningbo Ruican
Ningbo Ruican’s 17 years of investment casting experience with low-alloy steels, combined with IATF 16949 certification, makes us a preferred supplier for road construction equipment manufacturers. Our ZG35CrMo cast steel screed brackets are proven in European and North American paver applications, with documented field service life exceeding 8,000 paving hours. We offer DFM optimization, rapid prototyping via 3D printed wax patterns, and PPAP documentation for OEM qualification.
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