Powder Metallurgy

The three basic steps in the conventional powder metallurgy shaping process are Question 2 options: sintering, blending and/or mixing, and pressing blending and/or mixing, pressing and sintering pressing, sintering and blending and/or mixing

blending and/or mixing, pressing and sintering

After pressing in the press, the work part is called which one of the following? Question 5 options: unsintered work software pressed piece green compact

green compact

Which of the following process is used to reduce the porosity in PM parts? Question 7 options: annealing hot isostatic pressing heat treatment hot isostatic pressure

heat treatment

Which of the following powder shapes would tend to have the lowest interparticle friction? Question 4 options: spherical acicular flakey cube

spherical

A mesh count of 200 means there are ....................openings per linear inch. Question 3 options: 200*200 200 200*2 1/200

200

PM parts can be made with a specified level of porosity, to produce porous metal parts such as Filters, oil-impregnated bearings and gears Question 9 options:TrueFalse

True

Which one of the following most closely typifies the sintering temperatures used in powder metallurgy: where, Tm = melting temperature of the metal on an absolute scale? Question 6 options: 1.2 Tm 0.8 Tm 0.5 Tm

0.8 Tm

PM parts can be mass produced to net shape or near net shape Question 8 options:TrueFalse

True

Which of the following is the most used powder production method? Question 1 options: chemical reduction electrolysis pressurization atomization

atomization

PM parts are used in variety of markets, but which industry predominantly use PM parts? Question 10 options: shipbuilding household automotive nuclear

automotive