Method for controlling residual stresses in metal

Claim 1

IN THE PROCESSING OF STEEL HAVING A SHAPE OTHER THAN ROUND AND HAVING AT LEAST ONE PAIR OF PARALLEL FACES, SAID STEEL ORIGINALLY CONTAINING RESIDULA STRESSES, THE MODIFICATION OF THE INTENSITY AND DIRECTION OF THE RESIDULA STRESSES IN SAID STEEL COMPRISING THE STEPS OF ADVANCING THE STEEL WITH A PAIR OF PARALLEL FACES IN A COLD FINISHING OPERATION BETWEEN PARALLEL FACES OF A PAIR OF ROLLS IN A ROLLING OPERATION, AND CONTINUOUSLY COMPRESSING THE STEEL BETWEEN THE PARALLEL FACES OF SAID ROLL DIES DURING ADVANCEMENT OF THE STEEL THERETHROUGH TO TAKE A 0.02 TO 0.14 PERCENT REDUCTION IN CROSS-SECTIONAL AREA WHEREBY THE STRESS NORMAL TO THE ROLL PASSES ARE REDUCED, AND ADVANCING THE STEEL BETWEEN THE PARALLEL FACES OF THE ROLLS IN A ROLLING OPERATION AT CIRCUMFERENTIAL ANGLES WITH RESPECT TO THE PREVIOUS ROLL PASSES COMRPISING A MULTIPLE OF THE NUMBER OF FACES DIVIDED INTO 360 DEGREES TO TAKE A 0.02 TO 0.14 PERCENT REDUCTION IN CROSS-SECTIONAL AREA TO REDUCE THE INTENSITY AND DIRECTION OF RESIDULA STRESSES INTERDEPENDENTLY IN THE STEEL.