I. 🔍 Project Background
▫️ Intensified steel industry competition, prominent cost pressures in traditional high-speed wire production
▫️ Lack of multi-stage temperature control in conventional processes, relying on high Mn alloy for performance, leading to high costs
▫️ Process upgrading is the key path for cost reduction and efficiency improvement
II. ⚙️ Process Scheme
1. Theoretical Support 📚
Based on two-phase region controlled rolling principle, low-temperature heavy deformation + precise cooling:
✅ Refine grains (F+P fine structure) and improve mechanical properties.
✅ Reduce reliance on alloy elements.
2. Layout Optimization 🔧
Restructure into “finish rolling (8 stands) + reducing (2 stands)” layout with uniform temperature recovery section.
Innovate “air cooling line backward movement + 90° rotation of coil trolley” (first in China) to solve space constraints.
3. Equipment Upgrades 🛠️
| Upgrade Item | Details |
| Newly Added Equipment | Reducing mill units & supporting systems |
| Replaced Components | Laying head, water tanks (cooling optimization) |
| Functional Additions | Pinch rolls (stability enhancement) |
| Process Adaptation | Extend 5-meter operating platform |
4. Temperature System 📊
| Steel Grade | Specification | Initial Rolling Temp (Before/After) | Finish Rolling Inlet Temp (Before/After) | Laying Temp (Before/After) |
| HRB400E | Φ6-12mm | 1000±20℃ → 970±20℃ | 860±20℃ → 760±20℃ | 900±20℃ → 830±20℃ |
| 👉Full-process multi-stage precise temperature control | ||||
III. ✨ Application Effects
1. Product Performance 📈
Mechanical Indicators: HRB400E series (420-450MPa yield, 610-650MPa tensile) meets internal standards (exceeding national standards).
Aging Stability: 5-10MPa fluctuation in 2 months, surface quality equivalent to traditional processes.
2. Microscopic Quality 🔬
Metallographic Structure: Uniform F+P fine grains, no abnormal structure
Grain Size: 10.5-11 grades, ensuring toughness and strength
3. Economic Benefits 💰
| Specification | Mn Addition (Before/After) | Difference |
| Φ6mm | 1.39% → 0.87% | -0.52% |
| Φ8mm | 1.42% → 0.87% | -0.55% |
| Φ10mm | 1.42% → 0.98% | -0.44% |
| Φ12mm | 1.49% → 1.20% | -0.29% |
| Comprehensive | 1.421% → 0.925% | -0.496% |
| 💡 Profit per ton: ~$6.66 (after deducting increased power consumption) | ||
4. Promotion Value 🌍
Aligns with green energy conservation and emission reduction policies
Provides replicable low-cost, high-quality technical transformation solutions
Facilitates technological upgrading of the long product industry
📩Contact us for customized solutions!
What’s app:0086 13613814286
Email: hengyuan6@hotmail.com
Wechat: hy13613814286
