Control of Forging Process in Forgings

In the forging process, controlling the quality of forgings is crucial. We will delve into two main aspects, namely, comprehensive inspection and evaluation of the first piece and control and supervision of the quality of batch production forgings. Through detailed data accumulation and testing, ensure that every step of the forging process meets the design requirements, thereby ensuring the high quality of the final forging.

1. First piece inspection and evaluation

1.1 Original billet size

Firstly, perform a dimensional inspection on the original billet used in the forging process to ensure that it meets the design requirements.

1.2 Blank forging temperature and mold preheating temperature

Controlling the forging temperature is a key step in ensuring the metallurgical quality of forgings while paying attention to the preheating temperature of the mold to ensure the stability of the forging process.

1.3 The number of strikes of the forging hammer or the number of strokes of the press

Record the number of strikes of the forging hammer or the number of strokes of the press, ensuring that each deformation is within a controllable range and avoiding excessive or insufficient deformation.

1.4 Streamline direction diagram

Generate a streamlined direction map after each deformation to provide a visual basis for subsequent quality evaluation.

1.5 Temperature of forgings and molds during final forging

Monitor the temperature of forgings and molds during final forging to ensure that the forging process is completed within an appropriate temperature range.

1.6 Uniformity of distribution of flying edges around the forging

Check the uniformity of the flash to ensure the consistency of the surface quality of the forging.

1.7 Low magnification inspection and tensile test

Verify whether the fiber distribution, metallurgical quality, and mechanical properties meet the design requirements through low magnification inspection and tensile testing.

1.8 Visual inspection of surface quality

Visually inspect the cleaned forgings to ensure that their surface quality meets the requirements.

1.9 Geometric dimension marking inspection

Finally, the geometric dimensions of the forgings are marked and inspected to ensure that they meet the design standards.

2. Quality control and supervision of batchproduction forgings

2.1 Maximum batch size

Determine the maximum batch size for each batch of forgings to provide a benchmark for subsequent monitoring.

2.2 Sequence Number and Tracer Marks

Assign a sequence number to each forging and add tracking marks to ensure that the quality of each forging can be tracked in batch production.

2.3 Mechanical performance test

Conduct mechanical performance tests according to the protocol to ensure that the mechanical properties of each forging meet the standards.

2.4 Magnetic particle, penetration or ultrasonic testing

Perform magnetic particle, penetration or ultrasonic testing to identify potential defects and promptly repair them.

2.5 Visual and dimensional inspection

Conduct final visual and dimensional inspections to ensure that the appearance and dimensions of each forging meet the specifications.

2.6 Approval Letter for Testing, Supervision, and Inspection

Each shipment batch should be accompanied by a testing, supervision, and inspection approval document, which includes the melting furnace number, forging billet quality, mechanical properties of forgings, magnetic powder, penetration or ultrasonic testing heat treatment process, size and visual inspection, etc.

3. Conclusion

By comprehensively controlling the forging process, ensure that the quality of the first piece and batch-produced forgings meet the design requirements and improve the reliability and performance of the product.

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