HEAT-RESISTANT COMPONENT FOR CHEMICAL PROCESSING APPARATUS AND METHOD FOR PRODUCING SAME

摘要

A heat-resistant component for a chemical processing apparatus is formed from a ferritic Cr-steel that contains Cr in an amount of from 13% by weight to 30% by mass. The ferritic Cr-steel has a creep rate of 1 × 10 -5 /h or less at 700°C under stress of 100 MPa, and an oxidation weight gain of 10 mg/cm 2 or less after being maintained in a 650°C water vapor for 1,000 h. The heat-resistant component for a chemical processing apparatus is produced by hot working the ferritic Cr-steel in a temperature range of 850 to 1,200°C, forming the ferritic Cr-steel into a component shape, subjecting the steel to an annealing treatment in a temperature range of 1,000 to 1,250°C, and cooling the steel to 400°C or less at a cooling rate of 100°C/min or higher.