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the self lubricating bearing is a typical application of metal powder parts or powder metallurgy process the self lubricating bearings made from
presintering is an operation in which the powder metallurgy components after compaction are heated for a short time to a temperature considerably
the operation of heating a green compact to an elevated temperature is known as sintering it is a process by which solid
to achieve successful results in powder metallurgy the metallic powder must be thoroughly homogenized the term blending and mixing are both used in
q describe the continuous production of metal strip by roll compacting of powder differentiate between impregnation and infiltrationans
q describe the various characteristics of metal powders to be considered before their selection for any processans metal powder characteristics
q what are the limitations of the powder metallurgy process how are some of these overcome ans limitations 1 dies and equipment costs are high so
q what are the secondary operations we apply in powder metallurgy methods give their use alsoans secondary processes of manufacture in addition to
q what is sintering explain the stages of sinteringans the operation of heating a green compact to an elevated temperature is known as sintering it
q what is the purpose of i sizing ii coining
q describe two major product applications of powder metallurgyans following are some typical applications of powder
q write short note on following i compression moulding of
q discuss the classifications of plastics
q write short note on q write short note on
q write short note on blow moldingorexplain the thermoforming process what are the plastic fabrication method write in brief with neat
q what are the ingredients of moulding componentsans polymer additives one or more of the following materials are added to the polymers either before
q describe the complete procedure of testing permeability of moulding sand how is permeability influenced by various parameters of the moulding sand
q describe shell moulding process merits and demeritsans shell moulding process
blow holes i excessive moisture in the moulding
q what kind of defects are likely to result in castings due to the following i core prints on the core are
difference between fin and swell swell the unintentional bulges found on the casting surfaces are known as swells
difference between blow hole and pin hole porosity blow hole they appear as cavities in a casting when they are
continuous casting in essential the process consists of pouring molten metal into a short vertical metal die or mould at a controlled rate which is
q discuss briefly the causes and remedies of shrinkage cavities casting
q explain the chaplets q explain the chaplets