MEGR 2180 Test 2 Question and
answers rated A+ 2025
forging - correct answer ✔-applied stress exceeds workpiece's yield strength
-stronger and tougher parts than cast
forging types - correct answer ✔open die, impression/closed die, upset/
heading, piercing, coining
bulk deformation processes - correct answer ✔rolling, forging, extrusion,
drawing, swaging
recrystallization temp - correct answer ✔used for 'hot rolling/forging' around
60% of melting temp
bulk deformation - correct answer ✔forging, swaging, rolling, extruding,
drawing
swaging - correct answer ✔radial forging - internal and external shapes
rolling - correct answer ✔-high speed continuous parts
-reduces thickness (draft)
extrusion - correct answer ✔-billet is forced through a die
-complex shapes in continuous production
-hot or cold
-tolerances to .25mm
, drawing - correct answer ✔-material is pulled through a die
-for cross-sections smaller than extrusion
-less versatile than extrusion
barelling - correct answer ✔caused by friction in open die forging
open die forging - correct answer ✔friction against die causes barreling
impression die forging - correct answer ✔forces increase as die closes,
cavity filled, flash is expelled
forge die design - correct answer ✔-dies usually made of high alloy or tool
steel
-single part line, ideally flat
-draft angle 3-7º to allow part removal
cold rolling - correct answer ✔-strain hardening
-good tolerances (.1mm - .35mm)
- good surface finish
-outer grains altered
hot rolling - correct answer ✔-just above recrystallization temp
-lower forces
-finer grains: more ductile
answers rated A+ 2025
forging - correct answer ✔-applied stress exceeds workpiece's yield strength
-stronger and tougher parts than cast
forging types - correct answer ✔open die, impression/closed die, upset/
heading, piercing, coining
bulk deformation processes - correct answer ✔rolling, forging, extrusion,
drawing, swaging
recrystallization temp - correct answer ✔used for 'hot rolling/forging' around
60% of melting temp
bulk deformation - correct answer ✔forging, swaging, rolling, extruding,
drawing
swaging - correct answer ✔radial forging - internal and external shapes
rolling - correct answer ✔-high speed continuous parts
-reduces thickness (draft)
extrusion - correct answer ✔-billet is forced through a die
-complex shapes in continuous production
-hot or cold
-tolerances to .25mm
, drawing - correct answer ✔-material is pulled through a die
-for cross-sections smaller than extrusion
-less versatile than extrusion
barelling - correct answer ✔caused by friction in open die forging
open die forging - correct answer ✔friction against die causes barreling
impression die forging - correct answer ✔forces increase as die closes,
cavity filled, flash is expelled
forge die design - correct answer ✔-dies usually made of high alloy or tool
steel
-single part line, ideally flat
-draft angle 3-7º to allow part removal
cold rolling - correct answer ✔-strain hardening
-good tolerances (.1mm - .35mm)
- good surface finish
-outer grains altered
hot rolling - correct answer ✔-just above recrystallization temp
-lower forces
-finer grains: more ductile
