Chapter 5 powder metallurgy

What is the sequence of powder metallurgy process

• powder production

  blending

  compaction

  sintering

  finishing operation

• powder production

  blending

  compaction

  tensioning

  finishing operation

• powder production

  separating

  compaction

  sintering

  finishing operation

• powder production

  blending

  compaction

  sintering

  colding

What additives are usually added to the metallic powders during blending/mixing?

• powder

  aluminium

  lubricant

• rubber

  copper

  mild steel

• Lubricant

  oil

  plastic

• Lubricants

  binders

  deflocculants

Two types of isostatic pressing are?

• Cold isostatic pressing

  Hot isostatic pressing

• Cold chamber

  Hot chamber

• Cold working

  Hot working

• Cold pressing

  Hot pressing

In Cold Isostatic Pressing ( CIP), the range of pressure are?

• 0Mpa to 100Mpa

• 100 Mpa to 400Mpa

• 400 Mpa to 1000Mpa

• 1000Mpa to 1400Mpa

In X process, the temperature using is about 1100 Degree Celsius. What is X

• Cold Isostatic pressing

• Cold chamber process

• Hot chamber process

• Hot Isostatic pressing

Y are required in some cases to achieve

adequate strength in the pressed but unsintered part. What is Y?

• binders

• lubricants

• deflocculants

Z such as stearates of zinc and aluminum, in

small amounts to reduce friction between particles and

at the die wall during compaction. What is Z?

• binders

• lubricants

• deflocculants

What is Advantages of Powders metallurgy

• Minimizing

  machining

• Metal

  powders are expensive and sometimes difficult to

  store without some deterioration

• Equipments

  cost are high

• Some

  products can be made more economically by

  other methods

What is function of Binders

• to achieve adequate strength in the pressed but unsintered

• to achieve adequate pressure in the pressed but unsintered

• to achieve adequate strength in the melting but unsintered

• to achieve adequate strength in the pressed but sintered

What are the advantages of powder metallurgy

• Low labor cost

• Large scale production

• Low melting point

• Minimizing machining