Combining Temper Pass and Leveling in One Line
When temper passing and leveling are combined, the increased surface yield strength created by temper passing allows the subsequent leveling to increase the extension of the material through the neutral axis without exceeding the surface yield point. This allows the surface of the sheet or plate to revert to its original condition while minimizing the internal trapped stresses.
Experiments at Hoogovens Steel (Corus, of the Netherlands) have shown that processors need to achieve 1.5 to 2 percent reductions to realize the full benefit of temper passing. Any result outside of this range will likely produce an unacceptable product.
