A cast iron, T-type fitting is being produced for the oil drilling industry, using an air-set or
Question:
1. What is the most likely source of the gas bubbles? Why are they present only at the location noted? What might you recommend as a solution?
2. What factors may have caused the penetration defect? Why is the defect present on the inside of the casting, but not on the outside? Why is the defect near the bottom of the casting, but not near the top? What factors led to the enlargement of the casting at point CI 3. What would you recommend to correct this problem?
4. Another producer has noted penetration defects on all surfaces of his castings, both interior and exterior. What would be some possible causes? What could you recommend as possible cures?
5. Could these molds and cores be reclaimed (i.e., recycled) after breakout? Discuss.
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Related Book For
Materials and process in manufacturing
ISBN: 978-0471656531
9th edition
Authors: E. Paul DeGarmo, J T. Black, Ronald A. Kohser
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