Method for work-harden of metal part by rolling, comprises pre-heating of part to strain-aging temperature

摘要

The metal part (2), which could be a shaft, is fixed between two revolving clamping jaws (3,4). The part (2) is heated with a suitable unit such as a heating coil (6) wound around the shaft (2). The appropriate temperature level is located within the range of strain-aging. When sufficiently heated the part (2) is rotated and a roll (8) pressed against its outer surface. The work-piece (2) can also be held stationary and the roll (8) moved around its mantle. The temperature is kept at the same level during the complete rolling process.