Changzhou Tiangong Forging Co., Ltd. quality control

Quality Control in Open-Die  Forging Processes

In the forging industry, quality control is the cornerstone of producing high-performance components that meet stringent mechanical, dimensional, and safety standards. Whether it is open-die forging for large custom components or closed-die forging for high-volume precision parts, maintaining consistent product quality requires a structured and well-monitored quality management system.

At [Your Company Name], we implement end-to-end quality control protocols across all stages of our open-die and closed-die forging processes to ensure durability, reliability, and compliance with international standards.

Open-Die Forging: Quality Control Focus

Open-die forging involves shaping heated metal between flat or contoured dies without enclosing the workpiece completely. This method is ideal for large, heavy components such as shafts, rings, blocks, and disks.

Key quality control steps include:

1. Material CertificationEvery forging begins with certified raw materials (steel billets or ingots) that meet chemical composition standards (e.g., 42CrMo, 34CrNiMo6,18CrNiMo7-6, etc.) verified via spectrometry.

2. Thermal Monitoring

         Precise control of forging temperatures to avoid grain growth, cracking, or internal defects.

        Temperature is tracked in real-time using infrared sensors and thermocouples.

   
   

3. Deformation Control

4. Trained operators monitor deformation ratios and strain distribution to ensure grain flow orientation is optimized for mechanical strength.

5. Dimensional Inspection    After forging, dimensions are checked using calipers, laser scanners, or 3D measuring arms for large parts, following CAD or drawing specifications.

6. Ultrasonic Testing (UT) 100% of open-die forgings undergo non-destructive ultrasonic testing to detect internal voids, inclusions, or cracks.Additional Quality Control Measures

   ISO Certifications: Our facility is certified to ISO 9001, ISO 14001, and ISO 45001, ensuring quality, environmental responsibility, and workplace safety.

   • 

   • In-House Laboratory: Fully equipped with spectrometer, hardness testers, Charpy impact testing, metallographic microscope, CMM, and ultrasonic flaw detectors.

   • Heat Treatment Traceability: Every forged component has full traceability of heat numbers, forging batch, furnace data, and test results

   • Final Inspection Reports (MTC): Clients receive comprehensive Material Test Certificates (EN 10228) GB  Standard with every order.