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CHAPTER 4. Rolling can be used to create tubes from round
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CHAPTER 4. In rolling you have equiaxial grains
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CHAPTER 4. Rolling work hardening in cold working is less than in hot working
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CHAPTER 4. There are large equidirectional grains in the lamination
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CHAPTER 4. In the Rolling mill the input conditions are more restrictive than the pull conditions
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CHAPTER 4. Extrusion can be performed either hot or cold
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CHAPTER 4. Rolled parts have a metallographic structure without a preferred orientation
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CHAPTER 4. It is not possible to produce by extrusion parts whose cross-section has undercuts
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CHAPTER 4. The rolling rolls are perfectly cylindrical
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CHAPTER 4. In Rolling the fibres are elongated
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CHAPTER 4. Hot Rolling is worse than cold rolling
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CHAPTER 4. The extrusion force in the direct process is on average lower than in the reverse process
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CHAPTER 4. Bars produced by rolling can be longer than 6m
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CHAPTER 4. The material coming out of the rolling cage is faster than the material going in
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CHAPTER 4. In rolling, roughing stands are the ones that work at the highest speed
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CHAPTER 4. In rolling, a loop is created in the material speed is less than the cage speed
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CHAPTER 4. Rolling defects, if the roller is too shallowly cambered the central parts exhibit tensile stresses and the lateral parts comprssive stresses
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Cold extrusion has higher forces involved
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CHAPTER 4. Comprssive stresses increase the material’s ability to withstand additional loads
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CHAPTER 4. The extrusion force trend is monotonically increasing
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CHAPTER 4. Drawing can be done either hot or cold
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CHAPTER 4. The drawing zone is located before the calibration zone
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CHAPTER 4. The force required to perform a direct extrusion is greater than that required to perform a reverse extrusion
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CHAPTER 4. The massivenmoulding process is suitable for producing parts with better mechanical properties than other competing processes
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CHAPTER 4. Massive moulding machining is based on the chip removal principale
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CHAPTER 4. Undercuts parts cannot be obtained by the moulding process
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CHAPTER 4. Mass stamping is suitable for the production of parts with better mechanical properties than competing processes
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CHAPTER 4. Parts produced by deformation have a higher degree of strength than those produced by casting
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CHAPTER 4. For roughing the gamma angle is close to zero
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CHAPTER 4. In hot plastic deformation machining, the deformation force depends more on the deformation rate than on the magnitudi of deformation
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CHAPTER 4. In hot plastica deformation machining, the shape of deformation depends more online the strain rate than on the strain rate
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CHAPTER 4. In upsetting, the deformation length is greater than 3 Times the initial diameter
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CHAPTER 4. Extrusion is not affected by the electrical conductivity of the material
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CHAPTER 4. Extrusionr die are made from hard and resistant materials
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