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US 12,383,974 B2Granted
Steel joined body and method for manufacturing the same
AssigneeNeturen Co., Ltd.
InventorsTakuya Suzuki, Masahiro Tsukahara, Osamu Idohara, Setsuo Takaki
Life of this patent
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Abstract
A steel joined body includes a plurality of steels joined together, the plurality of steels including a joint interface having a carbon concentration of 0.20 mass % or more and 2.10 mass % or less, and the steel joined body including a concentration gradient layer having a carbon concentration decreasing with distance from the joint interface.
Claims5
A steel joined body including a plurality of steels joined together,
- the plurality of steels including a joint interface having a carbon concentration of 0.20 mass % or more and 2.10 mass % or less, and
- the steel joined body comprising a concentration gradient layer having a carbon concentration decreasing with distance from the joint interface,
- wherein the joint interface includes pearlite, and the joint interface does not include cementite at austenite grain boundaries.
A steel joined body including a plurality of steels or medium-carbon steels joined together,
- the plurality of steels including a joint interface having a carbon concentration of 0.50 mass % or more and 2.10 mass % or less, and
- the steel joined body comprising a concentration gradient layer having a carbon concentration decreasing with distance from the joint interface,
- wherein the joint interface includes pearlite, and the joint interface does not include cementite at austenite grain boundaries.
Dependencies are inferred from the claim text.