Calculating temperature jump during high-speed wire rolling through upper bound triangular velocity field

A new method is proposed to calculate the temperature jump during high-speed wire finish rolling through upper-bound triangular velocity field. Due to the very high speed and poor heat dissipation, it is supposed that the external work done during the high-speed wire rolling is nearly all converted into heat since the process is adiabatic. It implies that all the quantity of heat due to temperature jump comes from the shear work done along the tangential velocity discontinuity lines in triangular velocity field in the rolling deforming zone. The total temperature jump at a rolling pass depends on the minimal value of the upper-bound power determined by the velocity field. Then, a formula is derived to calculate the temperature jump of high-speed wire rolling tandem mill, which is used to calculate the temperature jump during finish rolling of φ6.5 mm wire, with a measurement carried out for comparison. The results show that the calculated values of temperature jump is about 11% higher than measured ones, and it is found that the lower the temperature at the entry of finishing mill, the greater the accumulative temperature jump.