| 摘要 |
The present invention provides a method for producing precipitation-strengthening-type martensitic stainless steel with which the crystal grains can be effectively refined through an improved solution heat treatment method. This method for producing precipitation-strengthening-type martensitic stainless steel is a method for producing precipitation-strengthening-type martensitic stainless steel comprising, in wt%, C: 0.01-0.05%, Si: no more than 0.2%, Mn: no more than 0.4%, NI: 7.5-11.0%, Cr: 10.5-14.5%, Mo: 1.75-2.50%, Al: 0.9-2.0%, and Ti: less than 0.2%, with the remainder being Fe and impurities, wherein the method is characterized in that solution heat treatment at 845-895°C is carried out one or more times. |
