METHOD AND APPARATUS FOR PRODUCING STEEL PIPES HAVING PARTICULAR PROPERTIES

摘要

Production of steel pipes comprises applying a cooling medium with elevated pressure within a time period of no more than 20 seconds after the last deformation at a temperature of 700-1050[deg] C onto the outside circumference of the pipe over a length of greater than 400 time the pipe wall thickness in a quantity which during rapid cooling provides an equivalent cooling speed of greater than 1[deg] C/second of the pipe wall over the pipe length to a temperature of 500-250[deg] C. Further cooling of the pipe to room temperature is carried out upon exposure to air. An independent claim is also included for a device for producing steel pipes.