Введение
Rolling shutter springs are essential components in industrial, commercial, and residential applications, ensuring smooth operation and durability. Однако, their performance heavily relies on the quality of the steel strip used. Choosing the wrong material can lead to premature failure, safety risks, and increased costs. In this guide, we break down the key considerations for selecting thebest steel strip for shutter springs, backed by Jiaxiao MTC’s 20+ years of expertise in high-performance steel manufacturing.
1. Critical Properties for Shutter Spring Steel Strips
To withstand repeated bending and heavy loads, shutter spring steel strips must meet stringent criteria:
А. Твердость & Предел прочности
- Optimal Hardness Range: 30–55 HRС (Rockwell C Scale) ensures a balance between flexibility and strength.
- Предел прочности: Correlates with hardness (see table below). For shutter springs, aim for 1,500–2,100 N/mm² to resist deformation.
| Твердость (СПЧ) | Предел прочности (N/mm²) | Application Suitability |
|---|---|---|
| 30–40 | 1,000–1,500 | Light-duty shutters |
| 40–50 | 1,500–2,000 | Commercial/Industrial |
| 50–55 | 2,000–2,100 | Heavy machinery |
Source: Jiaxiao MTC Hardness Conversion Table (Page 10–12).
B. Толщина & Width Tolerance
- Диапазон толщины: 0.1–5,0 мм (customizable). For shutter springs, 1.0–2.0mm is common.
- Tight Tolerances: Ensure uniformity (например, ±0.20mm for widths <50мм).
(Refer to Page 8 for detailed tolerance charts.)
С. Edge Finish & Flatness
- Slit or Rounded Edges: Prevent stress concentration and cracking.
- Flatness Tolerance: ≤0.1% deviation (Class P4) to avoid coil-set issues.
2. Material Grades: Which Steel is Best?
Jiaxiao MTC recommends the following grades for shutter springs:
А. High Carbon Spring Steel (C67S, C75S, C80)
- Преимущества: High yield strength, excellent fatigue resistance.
- Chemistry: 0.64–0.82% carbon, low impurities (п, S ≤0.035%).
- Приложения: Ideal for high-cycle shutters in harsh environments.
B. Легированная сталь (50КрВ4, 60Si2Mn)
- Преимущества: Enhanced toughness, устойчивость к коррозии.
- Chemistry: Хром (Кр) and Silicon (И) for durability.
- Приложения: Coastal or humid regions with salt exposure.
3. Production Processes Matter
Jiaxiao MTC’s advanced manufacturing ensures superior performance:
А. Холодная прокатка & Отжиг
- Achieves precise thickness and smooth surfaces.
- Bright Annealing: Prevents decarbonization, retains material integrity (Страница 4).
B. закалка & Закалка
- Закалка: Heated to 850–950°C, then rapidly cooled.
- Закалка: Reheated to 400–600°C to reduce brittleness (Страница 5).
С. Deburring & Edge Treatment
- Eliminates micro-cracks, ensuring long-term flexibility.
4. Тематическое исследование: Solving Spring Failure in Industrial Shutters
A European manufacturer faced frequent spring fractures in heavy-duty warehouse shutters. By switching to Jiaxiao MTC’sC75S steel strips (1.20mm thickness, 48–50 HRC), they achieved:
- 30% longer lifespan
- Zero fractures after 2+ years of use
5. FAQs: Answering Common Queries
Q1: How do I test steel strip durability?
- Conduct Rockwell hardness tests and cyclic bending simulations (Страница 16: Lab Testing).
Q2: Can I customize dimensions?
- Да! Jiaxiao MTC предлагает 0.1–5.0mm thickness и 2–1,250mm width with special tolerances.
Q3: What about corrosion resistance?
- Opt for alloy steels (например, 50КрВ4) or request anti-rust oil coating during packing.
Заключение
Selecting the right steel strip for shutter springs requires a deep understanding of material properties, production techniques, and application demands. ВGuangzhou Jiaxiao Material Technology Co., ООО., we combine cutting-edge facilities, strict quality control, and decades of expertise to deliver steel strips that outperform industry standards.
Ready to optimize your shutter springs?
? Contact Jiaxiao MTC for a free consultation and customized solutions!
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External References:
- ASTM A682: Standard Specification for Steel Strip, High-Carbon.
- В 10132-4: Cold rolled narrow steel strip for heat treatment.
