Magnetic Particle Inspection
Precisionvast utilizes this advanced technique to detect surface and sub-surface defects in ferromagnetic materials, ensuring the highest quality and reliability in our cast products
Magnetic Particle Inspection of Investment Castings
At Precisionvast, we implement Magnetic Particle Inspection (MPI), a non-destructive testing technique for our investment castings. MPI excels in identifying external defects like cracks and inclusions by applying magnetic particles, detecting flaws without damage. This method is efficient, sensitive to surface and near-surface defects, and suitable for high-volume inspections. It’s cost-effective compared to more complex quality assurance methods
Advantages of Magnetic Particle Inspection (MPI):
- Fast and relatively simple.
- Immediate defect indication.
- Detects surface and near-surface flaws, critical for stress concentration.
- Suitable for both field and workshop use.
- Cost-effective compared to radiographic methods.
- Applicable for both large and small castings.
- Requires no intricate pre-cleaning.
- It’s environmentally friendly compared to some other methods.
- Can be automated for consistency in high-volume production.
Disadvantages of MPI:
- Limited to ferromagnetic castings, not suitable for austenitic stainless steel.
- Can be messy.
- Most methods require electrical power.
- Magnetic field strength adequacy can sometimes be unclear.
- Inapplicable over thick paint coatings.
- Risk of false or irrelevant indications; skilled interpretation needed.
- Some paints and particle suspensions pose smoke or fire hazards, especially in confined spaces.
- Requires careful disposal of used materials to avoid environmental contamination.
Finding a reliable supplier
At Precisionvast, ensuring the quality of our products is paramount. To achieve this, our foundry is outfitted with in-house Magnetic Particle Inspection (MPI) capabilities, focusing on wet MPI for superior sensitivity in detecting minute surface defects. Our MPI process can identify discontinuities as deep as 1/4 inch, though typically depths of 0.050 to 0.100 inches are adequate. Post-heat treatment or machining, MPI is crucial to identify any flaws before further processing, ensuring that only flawless investment castings reach our clients.
Additionally, we provide a range of NDT services including X-ray inspection, hardness tests, material tests, catering to the specific needs of your upcoming casting projects. Contact us for detailed requirements