Changzhou Tiangong Forging Co., Ltd.
Changzhou Tiangong Forging Co., Ltd.
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Carbon Steel Forgings For Blast Furnace Bell Gear Ball Mill Gear. We manufacture heavy-duty carbon steel forgings engineered for use in blast furnace bell gears and ball mill gears. These components are critical for high-load, continuous-operation environments such as metallurgy and mining industries, where strength, durability, and dimensional stability are essential.
Material Options:
C45 / C50 – Medium carbon steel with excellent tensile strength and wear resistance
Q235 / Q275 – Low carbon steel options for structural integrity and cost-efficiency
Other carbon steel grades available on request, based on application requirements
Product Types:
Bell gear forgings for blast furnace charging systems
Large gear blanks or semi-finished gears for ball mills
Customized round, ring, and disc-shaped forgings according to client drawings
Key Features:
Weight range: 100 – 7000 KG
Forged with uniform grain flow and refined internal structure
Heat treatment options: normalizing, tempering
Delivered in as-forged, rough-machined, or pre-machined condition
100% Ultrasonic Testing (UT) and MPI
Mechanical test and material certificate provided with each order
Applications:
Steel plant equipment (blast furnaces, converter charging systems)
Mining and mineral grinding machinery (ball mills, rotary kilns)
Other gear-driven heavy machinery requiring large-diameter, high-strength gear components
Manufacturing Capabilities:
Advanced open-die and ring forging equipment
In-house heat treatment & machining workshop
ISO-certified quality control system
Support for OEM & custom designs
The steel forgings production flow:
Raw material steel ingot into warehouse(test the chemical composition) → Cutting→ Heating(Furnace temperature test) → Heat treatment after forging(Furnace temperature test) Discharge the furnace(blank inspection)→ Machining→ Inspection(UT,MT,Visal dimension, hardness)→ QT→ Inspection(UT, mechanical properties, hardness, grain size)→ Finish machining→ Inspection (dimension)→ Packing and Marking(steel stamp, mark)→ Storage Shipment.
| Item | Details |
| Product Name | 100–7000KG Alloy Steel Forging Shaft for Wind Turbine Main Drive |
| Material Grades | - Our primary alloy is 42CrMo4, a high-performance steel renowned for its exceptional strength, superior toughness, and outstanding resistance to wear. Specifically chosen for demanding applications, it excels in metallurgical equipment components facing heavy loads and significant stress. |
| Forging Equipment | - Hydraulic hammers: 5T / 8T / 12T- Large open-die forging press with core boring capability- Near-net shape forging for components with complex geometries |
| Manufacturing Process | Hot Forging → Intermediate Heat Treatment → Optional Core Boring / Drilling →Rough / Semi-Finish Machining → UT & Dimensional Inspection |
| Forging Ratio | ≥ 3.0 — Promotes directional grain flow, ensuring excellent load-bearing capacity and fatigue resistance in metallurgical applications |
| Applications | - Blast Furnace Bell Gear Ball Mill Gear |
| Heat Treatment Options | - Normalizing and tempering for enhanced mechanical properties- Stress relief treatment to ensure dimensional stability |
| Testing & Inspection | - Chemical: Spectrometer-controlled composition analysis- Mechanical: Hardness, tensile, yield, impact toughness- Ultrasonic (UT): Multi-angle flaw detection, including bore zone- Dimensional: Length, diameter, straightness, concentricity |
| Value-Added Services | - Bespoke Designs for Metallurgical Applications with Simplified Assembly: We specialize in creating custom geometric forms that precisely address the needs of various metallurgical equipment. To expedite integration, components are supplied with pre-machined surfaces. Laser marking guarantees individual part identification and complete material and production traceability. |
1. What size forgings can you produce?
Our forging capabilities cover a wide range—from 100 kg up to 7000 kg, depending on the shape and steel grade.
2. Can you handle heat treatment and machining in-house?
Yes, all heat treatment and machining processes (including rough turning and precision CNC finishing) are done in-house, ensuring quality and lead time control.
3. What types of industries use your products?
Our forgings are widely used in sectors such as:
Wind energy (main shafts, gearbox components)
Heavy machinery
Port equipment and lifting systems
Industrial transmission assemblies
Mining, metallurgy, and oil & gas
4. How long does production take?
If raw material is in stock: ~30 days
If new material needs to be sourced: ~40–45 days
We'll always confirm the timeline with your order.
5. Where are you based?
We’re located in Changzhou, Jiangsu Province, about 2 hours from Shanghai, with direct access to Shanghai Port for convenient global shipping.
Ready to get started?
Send us your drawings, technical specs, or just a rough idea of what you need.
Our experienced engineering team will review the details and respond with a customized solution and competitive quote—fast and professionally.