The work of ship inspection and casting inspection involves comprehensive inspection and evaluation of the quality and performance of ship castings. Ship castings are an important component of ship manufacturing, and their quality and performance directly affect the safety and reliability of ships. Therefore, it is of great significance to carry out casting inspection work for Dalian Shipyard Inspection.

The work content of ship inspection casting inspection mainly includes the following aspects:

1. Check the appearance of castings: Appearance inspection is one of the basic contents of casting inspection, which checks the surface of castings through visual inspection or auxiliary tools (such as magnifying glasses, microscopes, etc.) to see if there are surface defects, cracks, pores, and other problems. At the same time, it is necessary to check whether the size and shape of the castings meet the requirements.

2. Material inspection: The quality of casting materials is crucial to the performance of castings. Therefore, ship inspection of castings requires necessary chemical composition analysis, metallographic and microstructural analysis of the materials. Through these inspections, the qualification of the casting material can be ensured.

3. Determine the mechanical properties of castings: Ship inspection of castings requires testing of their strength, hardness, and other mechanical properties. Usually, tensile testing, impact testing, hardness testing, and other methods are used to evaluate the mechanical properties of castings. These tests can provide data on the bearing capacity and mechanical properties of castings under stress conditions.

4. Check the casting process of castings: The ship inspection of castings also requires an evaluation of the casting process, including casting, melting, pouring, and cooling. By inspecting the casting process of castings, potential process defects and issues can be identified, and corresponding measures can be taken for improvement.

5. Inspection of internal defects in castings: Ship inspection of castings also requires inspection of internal defects in castings. Non destructive testing methods (such as ultrasonic testing, radiographic testing, etc.) are usually used to inspect the internal defects of castings, such as pores, inclusions, cracks, etc. These defects will have adverse effects on the strength and sealing performance of castings.

6. Performance testing: Ship inspection castings also require performance testing of castings, such as wear resistance testing, corrosion resistance testing, etc. These tests can evaluate the service life and reliability of castings in ship operating environments.

7. Check the processing technology of castings: The ship inspection of castings also requires an evaluation of the processing technology of castings, including processing accuracy, processing coordination, etc. By inspecting the processing technology of castings, the reliability and adaptability of castings during assembly and use can be ensured.

8. Preparation of inspection report: Ship inspection casting inspection is the preparation of inspection report. The inspection report needs to record in detail the inspection results and evaluation opinions of the castings, and propose corresponding corrective measures and suggestions. These reports can serve as a basis for decision-making and improvement, providing reference for the production and application of ship castings.

In summary, the inspection work of ship inspection castings is complex and meticulous, requiring the use of various methods and technical means to evaluate the quality and performance of castings. Through ship inspection and casting inspection, the safety and reliability of ships can be improved, ensuring their normal operation.