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| Quality Inspection / Aerospace Certified Lab |
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1. Coating Inspection
Various spraying and arc melting shot special processes cannot be directly measured by general quality inspection methods such as three-dimensional inspection. Our coating inspection technology uses the test specimens of a batch to simulate the actual spraying situation during production, and using magnification rate from 5 to 200 times after embedding, polishing, and etching to check various critical coating parameters such as cavitations rate, horizontal /vertical cracks, oxidation and any unbounded sign via image reading. Our coating inspection technology has been certified by Safran group and GE Aviation, Nadcap and CCL laboratory in the US.
2. Metallographic Inspection
Metallographic examination, also known as microscopic examination, Metallography is the study of the physical structure and components of metals, by using microscopy.. We applied metallographic examination for blue-etching segregation inspection of titanium alloy, coating quality inspection, and heat-affected zone inspection of electrical discharge machining. Our Metallographic inspection technology has been certified by customers such as Safran group, GE Aviation, and NADCAP, a third-party aerospace certification organization.
3. Hardness Testing
Hardness is a characteristic of the material and an important quality indicator of the product after machining, spraying or heat treatment. The hardness value is mainly defined by measuring the indentation strength of the product. Vickers Hardness Testing (Vickers Hardness Testing), also known as the Microhardness test, is to use a diamond indenter apply pressure and then use a microscope to check if any indention. This technology has been certified by customers such as Safran group, GE Aviation, and NADCAP, a third-party aerospace certification organization.
4. Material Mechanical Property Test
Material mechanical property test technology includes tensile, shearing and bending tests. These types of test are the most basic but also the most important destructive test. The test body is available for the tensile strength, yield strength and ductility of aerospace materials such as nickel-based, cobalt-based super-alloys, aluminum alloys, titanium alloys etc. Test application on plasma spraying is to detect the adhesion strength of each bonding layer to ensure that the parts and coatings can maintain their design function during the engine is operating at a certain environment. We are capable to perform tensile test under room and high temperature conditions for more than twenty type of materials with more than ten different parameters. This technology has been certified by customers such as Safran group, GE Aviation, and NADCAP, a third-party aerospace certification organization.
5. Erosion Test
Various engine products, will be subject to continuous wear and tear of dust particles, raindrops, hail and other substances during their service period. In order to ensure product quality and service life, Chaheng has built an experimental cabin which implements periodic erosion tests. The test content is to apply key characteristics tests such as continuous impact of dust and water infiltration. This testing technology is used for engine components that’s exposed to a specific environment which is certified by GE Aviation.
6. Chemical Analysis
The stability of the Chaheng's various chemical-related processes, such as pickling, cleaning, bluing etching, and anodizing processes, depends on accurate chemical bath composition and product metal composition distribution. For the quality control of chemical baths, Chaheng has set up a chemical laboratory to analyze the composition for over a hundred kinds of various chemical liquids, the composition and characteristics of the applied metal could also be further determined by using a spectrometer to measure. The process capability index are fed back to the through the IT system in real time with inspection results, these various quality indicators are then monitored through the control chart by Chaheng. Our chemical analysis technology has been certified by customers such as Safran group, GE Aviation, and NADCAP, a third-party aerospace certification organization.
7. Etching Inspection
When machining, welding or heat treating engine parts, some defects may occur on the metal surface, such as cracks caused by weld cooling or non-uniform thermal conductivity. Such defects may be unclear due to their metal-like background during our non-destructive inspection (For example, processing tool marks or weld bead roughness) which leads to poor defect detection. By using a special etching solution (Etchant) and uniformly etch around the defect improves the contrast of defect, effectively detecting all possible processing defects, and further ensures the quality of the product. This technology has been certified by the customers such as GE Aviation Company and the aerospace third-party NADCAP international certification agency.
8. Cleanliness Inspection
Among numerous engine parts, many mechanical matching parts will be designed with oil and water channels to ensure the engine has reasonable lubrication and combustion performance under high-speed and high-temperature operations. These type of mechanical fittings requires a strict cleanliness requirement before assembly, which are inspected for Particle Contents on the mechanical fitting surface or oil circuit surface. This technology is certified by our customer GE Aviation.
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