Abstract: A deformation correcting device to correct a deformation occurring in a ring shaped article, which has been heated, while the heated ring shaped article is cooled, includes a support table, on which the ring shaped article in a heated condition is placed; a pair of receiving rolls; a press roll provided in opposition to the pair of the receiving rolls with the ring shaped article intervening therebetween; a press roll drive mechanism for driving the press roll between an advanced position, at which the press roll is urged against the outer peripheral surface of the ring shaped article, and a retracted position, at which the press roll is separated away from the outer peripheral surface of the ring shaped article; and a press roll rotating mechanism for rotating the press roll then urged against the ring shaped article by the press roll drive mechanism.

Abstract: An apparatus for quenching a ring shaped article includes a heating station for heating the ring shaped article to a quenching temperature; a primary cooling station for cooling the ring shaped article to a deformation correction initiating temperature; and a secondary cooling station for cooling the ring shaped article down to a temperature lower than a martensitic transformation point. The heating station includes a preheating station for heating by induction heating the ring shaped article to a predetermined preheating temperature near to the quenching temperature and a soaking station for heating the ring shaped article, which has been heated to the preheating temperature by the preheating station, to the quenching temperature within a continuous heating furnace. The preheating station includes a rotary table and a heating coil arranged to straddle between inner and outer peripheral surfaces of the ring shaped article.

Abstract: An apparatus for quenching a ring shaped article includes a heating station for heating the ring shaped article to a quenching temperature; a primary cooling station for cooling the ring shaped article to a deformation correction initiating temperature; and a secondary cooling station for cooling the ring shaped article down to a temperature lower than a martensitic transformation point. The heating station includes a preheating station for heating by induction heating the ring shaped article to a predetermined preheating temperature near to the quenching temperature and a soaking station for heating the ring shaped article, which has been heated to the preheating temperature by the preheating station, to the quenching temperature within a continuous heating furnace. The preheating station includes a rotary table and a heating coil arranged to straddle between inner and outer peripheral surfaces of the ring shaped article.

Abstract: A deformation correcting device to correct a deformation occurring in a ring shaped article, which has been heated, while the heated ring shaped article is cooled, includes a support table, on which the ring shaped article in a heated condition is placed; a pair of receiving rolls; a press roll provided in opposition to the pair of the receiving rolls with the ring shaped article intervening therebetween; a press roll drive mechanism for driving the press roll between an advanced position, at which the press roll is urged against the outer peripheral surface of the ring shaped article, and a retracted position, at which the press roll is separated away from the outer peripheral surface of the ring shaped article; and a press roll rotating mechanism for rotating the press roll then urged against the ring shaped article by the press roll drive mechanism.

Abstract: A method of quenching a ring shaped article includes heating the article to a quenching temperature; primarily cooling the article down to a deformation correction initiating temperature, which is higher than a martensitic transformation point; and secondarily cooling the article down to a temperature lower than the martensitic transformation point by, while a pair of receiving rolls are held in contact with an outer peripheral surface of the article for rolling motion about an axis of rotation parallel to a center of the article, pressing a press roll, rotatable about an axis of rotation parallel to the center of the article, against the outer peripheral surface of the article from one side of the article opposite to a point intermediate between the receiving rolls.

Abstract: A method of quenching a ring shaped article includes a heating step (S1) of heating the article (W) to a quenching temperature; a primary cooling step (S2) of cooling the article (W) down to a deformation correction initiating temperature, which is higher than a martensitic transformation point; and a secondary cooling step (S3) of cooling the article (W) down to a temperature lower than the martensitic transformation point by, while a pair of receiving rolls (3) are held in contact with an outer peripheral surface of the article (W) for rolling motion about an axis of rotation parallel to a center of the article (W), pressing a press roll (4), rotatable about an axis of rotation parallel to the center of the article (W), against the outer peripheral surface of the article (W) from one side of the article (W) opposite to a point intermediate between the receiving rolls (3).