Martensite transformation the production manner of the super plastic stainless steel steel and the super deformation processing mannered

摘要

PROBLEM TO BE SOLVED: To provide an efficient super-plastic austenitic stainless steel manufacturing method, and a super-plastic working method of stainless steel.;SOLUTION: Stainless steel is cold-worked at or below the temperature (Md) at which stainless steel is martensitic-transformed if it is subjected to plastic working at the temperature to generate martensite (Step 1). Then, the stainless steel is heated and subjected to intensive working in a hot condition (Step 2). Intensive working can be performed under a small load. The stainless steel is then annealed or worked at or above the temperature (As) at which martensite is inverse-transformed at or above the temperature (Step 3). The austenitic stainless steel is subjected to the plastic working at or above Md point and at or below the recrystallization temperature, and martensitic- transformed in the super-plastic stainless steel manufacturing method.;COPYRIGHT: (C)2003,JPO