If too little powder was put into the die, what would be the 1point result? O Th
ID: 2087039 • Letter: I
Question
If too little powder was put into the die, what would be the 1point result? O The powder would not be as compact as it should be O Too much pressure would be applied at the bottom of the press stroke O The die would stick shut O The part would not eject properly What procedure was used to ensure there were no lumps in 1 point the powder. O Large lumps were removed with a magnet A wire mesh screen was used to filter out large lumps The metal powder was filtered and sorted at the factory, so filtering was unnecessary The lumps were not removed, but became part of the metal structure when pressed How was the density of the part controlled? O By weighing the powder and controlling the press stroke electonically 0 It was controlled "by feel" 1 point By heat treating immediatly after pressing O By an electonic densometer Why were the parts discolored after heating? O The fuel of the heat treat oven is petroleum-based O The argon in the furnace makes that color O The parts were not discolored after heating O The parts oxidised because the furnace atmosphere is not controlled 1 pointExplanation / Answer
1.a. the powder would not be as compact as it should be
2.c. the powders are already crushed into small pieces avoiding lumps in powder in BALL MILL
3.a. because the amount of compression dictates the green strength which shows density. Mainly repressing increases or controls its density.
4. The parts are discolored after heating due to the fact that argon is mixed with it to avoid metal oxide formation