Project Overview
Special alloy steels used in aerospace applications demand tight chemistry windows, low inclusion content and repeatable melting practice. A special alloy steel producer in Taiwan selected Shaanxi Chengda Industrial Furnace Manufacturing Co., Ltd. to design and build an electric arc furnace for this duty.
Project Scope
| Phase | Content |
|---|---|
| Design | Furnace sizing, electrical design and cooling layout for special alloy melting |
| Manufacture | Shell, roof, electrode system, water-cooled components and short network |
| Factory testing | Assembly, alignment and no-load electrical verification |
| Export and transport | Sea freight packing and delivery to the Taiwan site |
| Site works | Installation, cold commissioning and no-load testing |
| Hot commissioning | Melting trials and process parameter optimisation |
Execution Detail
The furnace was assembled and tested in Chengda's workshop, then dismantled for export packing. On site, Chengda's engineers worked closely with the customer's technical team through installation and cold commissioning, with no-load testing confirming that every component operated correctly and met the tight process requirements. Hot commissioning followed, and the furnace has since moved into regular production of special alloy steel.
Technical Highlights
- Precise power control - automatic electrode regulation holds the arc within a narrow impedance band, giving stable bath temperature for alloy chemistry control
- Clean melting environment - sealed furnace and controlled off-gas route reduce nitrogen and hydrogen pickup
- Refractory and cooling design - water-cooled panels and a lining profile matched to high-temperature alloy melting
- Operator interface - power programme, consumption tracking and alarm management designed for a small, highly skilled crew
Customer Feedback
The customer reported stable operation across all components during commissioning and confirmed that the furnace precisely executes process instructions. For Chengda, the project demonstrates that Chinese-built arc furnaces can meet aerospace supply chain requirements when design, manufacturing and commissioning discipline are applied without compromise.
Service and Documentation
Delivery included general arrangement drawings, electrical documentation, water pressure test records and commissioning reports. Chengda engineers stayed on site through hot commissioning to transfer operating know-how to the customer's melting crew.
Quality Assurance Path
Each major component was inspected in the workshop, water-cooled parts were pressure tested and documented, and the assembled furnace was verified electrically before dismantling for shipment. On site, alignment and no-load tests were repeated to confirm transport had not affected tolerances.
The furnace is now used for routine production of special alloy grades, with process records retained for each heat.
Chengda remains the customer's technical contact for consumables, spare components and future capacity additions.