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Impeller investment casting test

Mix gypsum and water in a ratio of 100:45, stir thoroughly until all bubbles in the gypsum slurry are exhausted, and coat the surface of the impeller mold with gypsum slurry, as shown in Figure 1 (a). Pay attention to the fact that the blades should also be filled...

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Impeller investment casting smelting casting

ZHK400 vacuum consumable electrode arc shelling furnace is used for melting. The consumable electrode uses the secondary ingot bar produced by the vacuum consumable arc furnace. Arcing current/A Preheating current/A Warm-up time/s Melting current/A Melting voltage/V Melting vacuum degree/Pa Melting time/min 1000-1500 3000-5000 60-80 28000-36000 34-41 3.0-5.0 8 1000-1500...

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Observation on metallographic structure of cast impeller

a) Metallographic observation of casting state Etchant: aqua regia solution Magnification: 100X The as cast structure of zg1crl8ni9ti is shown in Figure 1. Structure description: there are ferrite distributed in dendrite on the austenitic matrix, forming austenite + ferrite + granular carbide. After 18-8 stainless steel is cooled slowly...

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Ultrasonic flaw detection of cast impeller spokes

Adjustment of scanning speed: when adjusting the baseline with 1:1, the method is the same as above. Turn the knob to 50mm gear. The ultrasonic flaw detection of spokes is also based on Φ 2mm is the sensitivity. Sensitivity adjustment method: also take the spoke bottom...

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