Micro Examination
Microstructural examination analyzes weld samples under high magnification and reveals phase distributions, microcracks, and heat treatment changes. It helps in precise evaluation of weld quality.
Physico-chemical Mechanism of Action
Microstructural examination uses a high-resolution optical or electron microscope to analyze the microstructural composition of weld samples. This makes phases such as grain, cracks, and heat treatment changes visible.
Metallurgical Relevance & Risks in Welding
Microstructural examination is crucial for quality assurance of welds. It shows whether phases like martensite or austenite are correctly refined and whether microcracks are present. Incorrect heat treatments can lead to uneven refinement, which impairs toughness and hardness.
Workshop Practice & Instructions
For microstructural examination, weld samples are polished with a polishing agent and then examined under high magnification (e.g., 1000x). It is important to polish the samples correctly and calibrate the microscope. The results are recorded in an inspection report.