When creating parts with exact geometry to reduce the need for additional operations, be subjected to high temperatures and pressures, or be substantially loaded, investment casting is the best option. This is particularly true if the alloys being utilised are costly and challenging to process.
Cost is not as critical as quality in many applications. As a result, variations from design parameters must be kept to a minimum. Specifications for alloys must be met, and flaws like inclusions and fissures must be avoided.
Following the rules of the investment casting industry and the particular demands of our clients, visual inspection is necessary to guarantee high-quality casting from beginning to end. Investment castings must undergo a thorough visual inspection to ensure there are no flaws on the surface. Typical surface imperfections in investment castings include cracks, shrinkage cavities, air holes, sand holes, scales, etc. Any castings with these flaws must be identified and cannot be supplied to our clients. Additionally, all inspection results must be recorded and kept on file to track every product that leaves our foundry.
Magnetic Particle Inspection: The accumulation of magnetic powder where the flaw is found is a non-destructive testing technique. MPI testing is reasonably priced and convenient. It finds tiny fissures on or close to investment casting surfaces. The magnetic characteristics of cracks and flaws are different from the surrounding material. Their presence will distort the magnetic field, revealing the location and shape of the damage or void.
Ultrasonic Examination: Numerous flaws, such as inclusions, pinholes, and cracks, can be assessed and diagnosed by it. When an ultrasonic wave travels through a work, its defect can be found by observing how the fault affects the wave’s propagation and using the acoustic characteristic to identify the weakness in the material.
X-ray Examination: This non-destructive technique finds intrinsic flaws in investment cast components, such as inclusions and shrinkage.
Every alloy melt’s chemical composition is examined and entered into our database. After that, we keep the documents electronically for as long as we choose. This test ensures that the alloy’s performance characteristics meet the customer’s specifications or specifications. Generally, casting alloys are described by ASTM, AMS, and SAE alloy requirements.
Continuous Improvement:
In investment casting, quality control is a continuous procedure. Through data analysis, feedback loops, and employee training, manufacturers are constantly looking for methods to improve their workflows, lower defect rates, and increase the quality of their products.
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