公开(公告)号：US20240133006A1

公开(公告)日：2024-04-25

申请号：US18277747

申请日：2022-02-08

申请人： NIPPON STEEL Stainless Steel Corporation

发明人： Toshiki YOSHIZAWA ,  Jun-ichi HAMADA

IPC分类号： C22C38/58 ,  C21D1/18 ,  C21D8/02 ,  C21D9/46 ,  C22C38/00 ,  C22C38/02 ,  C22C38/42 ,  C22C38/44 ,  C22C38/46 ,  C22C38/48

CPC分类号： C22C38/58 ,  C21D1/18 ,  C21D8/0205 ,  C21D8/0226 ,  C21D9/46 ,  C22C38/001 ,  C22C38/004 ,  C22C38/02 ,  C22C38/42 ,  C22C38/44 ,  C22C38/46 ,  C22C38/48

摘要： A martensitic stainless steel sheet for a brake disc rotor, characterized by containing predetermined components and having, in a mother phase, precipitates with a particle size of 2 μm or less and a density of 0.01 to 20 pieces/μm2. The precipitates finely present in hot rolling and hot-rolled sheet annealing improves productivity in hardening, improves temper softening resistance of the steel sheet in use as a component, inhibits cracking in hot stamping, and inhibits reduction in high-temperature strength. Accordingly, the martensitic stainless steel sheet excellent in temper softening resistance, hardenability, formability, and high-temperature strength that is applicable to the disc rotor is provided.

公开(公告)号：US20240229203A9

公开(公告)日：2024-07-11

申请号：US18277747

申请日：2022-02-08

申请人： NIPPON STEEL Stainless Steel Corporation

发明人： Toshiki YOSHIZAWA ,  Jun-ichi HAMADA

IPC分类号： C22C38/58 ,  C21D1/18 ,  C21D8/02 ,  C21D9/46 ,  C22C38/00 ,  C22C38/02 ,  C22C38/42 ,  C22C38/44 ,  C22C38/46 ,  C22C38/48

CPC分类号： C22C38/58 ,  C21D1/18 ,  C21D8/0205 ,  C21D8/0226 ,  C21D9/46 ,  C22C38/001 ,  C22C38/004 ,  C22C38/02 ,  C22C38/42 ,  C22C38/44 ,  C22C38/46 ,  C22C38/48

摘要： A martensitic stainless steel sheet for a brake disc rotor, characterized by containing predetermined components and having, in a mother phase, precipitates with a particle size of 2 μm or less and a density of 0.01 to 20 pieces/μm2. The precipitates finely present in hot rolling and hot-rolled sheet annealing improves productivity in hardening, improves temper softening resistance of the steel sheet in use as a component, inhibits cracking in hot stamping, and inhibits reduction in high-temperature strength. Accordingly, the martensitic stainless steel sheet excellent in temper softening resistance, hardenability, formability, and high-temperature strength that is applicable to the disc rotor is provided.