What are the quality control and testing methods for nuclear power forgings?

The quality control and testing methods of nuclear power forgings mainly include the following steps:

First, strictly control raw materials

Ensure that raw materials used comply with relevant standards and design requirements. Quality inspection of raw materials, including chemical composition, mechanical properties and other indicators.

2. Forging process control

Make a reasonable forging process, including heating, forging, cooling and other links. The parameters such as temperature, pressure and deformation in forging process are strictly controlled. Carry out the first three inspections, namely appearance inspection, dimensional inspection and non-destructive testing, to ensure that the quality of the forging meets the requirements.

Third, non-destructive testing

Ultrasonic testing, magnetic particle testing, X-ray testing and other non-destructive testing methods are used to ensure that the internal quality of the forging is qualified. Carry out detailed non-destructive testing of key parts, such as welds, heat affected zones, etc.

Fourth, mechanical properties testing

Tensile strength, plasticity, toughness, hardness, fatigue strength and other mechanical properties of forgings were tested at room temperature. High-power tissue analysis and mechanical properties tests are performed on important or critical parts.

5. Size detection

To check the geometry of the forging to ensure that the shape and size meet the design requirements. Check surface quality, such as surface cracks, folds, scratches, etc.

6. Record and report

Record all test data in detail and form a report. Repair or scrap the unqualified forgings, analyze the reasons, and take corresponding measures.

Vii. Regular audit and training

Conduct regular audit and training for quality control and inspection personnel to improve their skill level and work responsibility. Perform regular maintenance and calibration of equipment and testing instruments to ensure their normal operation and accuracy.

The above are the main steps of the quality control and testing method of nuclear power forgings, aimed at ensuring that the quality of forgings meets the requirements and ensure the safe and stable operation of nuclear power plants.