1. extrusion
2. piercing
3. forging
4. swaging
extrusion
1. extrusion
2. pircing
3. cold peening
4. up setting
cold peening
1. extrusion
2. piercing
3. reaming
4. swaging
swaging
1. spinning
2. upsetting
3. drawing down
4. reaming
spinning
1. lower than the speed of incoming metal
2. exceeding the speed of incoming metal
3. equal to speed of the incoming metal
4. none of these
exceeding the speed of incoming metal
1. casues a steadily applied pressure instead of impact force
2. is used to force the end of a heated bar into a desired shape
3. is a forging operation in which two halves of a rotating die open and close rapidly while impacting the end of the heated tube or sheel
4. is a forging method for reducing the diameter of a bar and in the process making it longer
casues a steadily applied pressure instead of impact force
1. annealing operation is not necessary
2. power requirements are low
3. surface finish is good
4. grain refinement is possible
grain refinement is possible
1. causes a steadily applied pressure instead of impact force
2. is used to force the end of a heated bar into a desired shape
3. is a forging operation in which two halves of a rotating die open and close rapidly while impacting the end of the heated tube or shell
4. is a forging method for reducing the dimeter of a bar and in the process making it longer
is a forging operation in which two halves of a rotating die open and close rapidly while impacting the end of the heated tube or shell
1. 500-600C
2. 200-300C
3. About 100 C
4. room temperature
room temperature
1. recovery of grains
2. recrystallisation
3. grain growth
4. refinement of grain size
refinement of grain size