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Manufacturing Technology: Theory and Problems, Second Edition by D. K. Singh

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CHAPTER 12

Powder Metallurgy

  • Powder metallurgy (P/M) uses metal powders to manufacture a product. The P/M products have desired characteristics which are otherwise difficult to obtain.
  • Atomization, electrolytic deposition and reduction methods are used to produce metal powders.
  • Atomization is the most widely used method. Electrolytic deposition method produces metal powders of high quality.
  • In compaction, metal powders are pressed by hydraulic or mechanical presses to obtain the required density. The pressed powder is called green compact.
  • Cold isostatic compaction is performed at room temperature, whereas hot isostatic compaction at elevated temperatures.
  • Injection moulding is an important compaction method used to produce thinner intricate ...

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