The production process of forged pipes - Yaang

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The forging process quality control of Forged Pipes is a strict and systematic process, from raw material storage to final product delivery, every link requires strict testing and control. The following is the detailed process of quality control in the forging process of forged pipe fittings:
1. Raw material storage (Test the Chemical Content)
Raw material inspection: Firstly, chemical composition inspection is carried out on the incoming steel ingots to ensure that the materials meet the technical requirements for forging pipe fittings. Inspection is usually carried out through chemical analysis or spectral analysis to confirm that the elemental content in the material meets the standards.
2. Cutting
Cutting processing: According to the design requirements of forged pipe fittings, qualified raw materials are cut to prepare for subsequent forging processes.
3. Heating (Furnace Temperature Test)
Furnace temperature test: Heat the cut raw materials in the heating furnace and test the furnace temperature to ensure that the heating temperature is controlled within the appropriate range. The control of heating temperature is crucial for ensuring the quality of forged parts.
4. Forging and heat treatment
Forging: Forging is carried out on a forging machine, using molds or free forging to forge heated raw materials into the desired shape of pipe fittings.
Heat treatment: After forging is completed, the forging is subjected to heat treatment to eliminate internal stresses generated during the forging process and improve material properties. The heat treatment process includes steps such as annealing and normalizing, and requires furnace temperature testing to ensure the effectiveness of the heat treatment.
5. Blank Inspection
Raw material inspection: After heat treatment is completed, the forging is subjected to a furnace inspection to check its appearance quality, dimensional accuracy, etc., to ensure that the raw material meets the forging process requirements.
6. Mechanical processing
Precision machining: Mechanical processing of blanks to remove excess metal and burrs, improving the dimensional accuracy and surface quality of forgings.
7. Inspection (UT, MT, Visual Dimension, Hardness）
Non destructive testing (UT/MT): Ultrasonic testing (UT) or magnetic particle testing (MT) methods are used to detect internal defects in forgings, ensuring that there are no cracks, inclusions, or other defects.
Appearance dimension inspection: Check the appearance dimensions of forgings by visual inspection or measuring tools to ensure that they meet the design requirements.
Hardness testing: Use a hardness tester to test the hardness of forgings to evaluate their mechanical properties.
8. Quenching (QT)
Quenching treatment: For forgings that require further improvement in hardness and strength, quenching treatment is carried out. After quenching, tempering treatment is also required to eliminate internal stress and improve toughness.
9. Inspection (UT, Mechanical Properties, Hardness, Grain Size）
Repeated inspection: Conduct non-destructive testing, mechanical performance testing, hardness testing, and grain size testing on the quenched forgings again to ensure that the quality of the forgings meets the standard requirements.
10. Finished product processing
Final processing: Perform final processing on quenched and inspected forgings, such as cutting, chamfering, polishing, etc., to meet the requirements of the final product.
11. Inspection (Dimension)
Final dimension inspection: Conduct final dimension inspection on finished forgings to ensure they meet design requirements and technical standards.
12. Packaging and Marking (Steel Stamp, Mark)
Packaging: Packaging qualified forgings to prevent damage during transportation and storage.
Marking: Stamping, marking and other information on forgings for traceability and identification.
13. Storage and Shipping
Storage: Store the packaged forgings in a suitable warehouse to avoid moisture, corrosion, etc.
Shipping: Ship according to customer orders and ensure safety and accuracy during the shipping process.
Through the strict forging process quality control process mentioned above, the quality of forged pipe fittings can be ensured to meet the design requirements and technical standards, and meet the customer's usage needs.