Cold work die steel, die, and method for production of cold work die steel
AssigneesKabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.), Nippon Koshuha Steel Co., Ltd.
InventorsShogo Murakami, Tsuyoshi Tonomura
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Abstract
The invention relates to a cold work die steel containing, by mass %, C: 0.20 to 0.60%, Si: 0.5 to 2.00%, Mn: 0.1 to 2%, Cr: 3.00 to 9.00%, Al: 0.3 to 2.0%, Cu: 1.00 to 5%, Ni: 1.00 to 5%, Mo: 0.5 to 3% and/or W: 2% or less (including 0%), S: 0.10% or less (not including 0%), in which the following requirements (1) to (3) are satisfied {wherein each square bracket [ ] means a content (%) of each element}: [Cr]×[C]≦3.00, (1) [Cu]/[Ni]:0.5 to 2.2, (2) [Mo]+0.5×[W]:0.5 to 3.0%, (3) with the remainder being iron and unavoidable impurities; and to a die obtained by the using the same. The invention also relates to a production method for a cold work die steel.
Claims12
A cold work die steel comprising, by mass %,
- C:
- 0.20 to 0.60%,
- Si:
- 0.5 to 2.00%,
- Mn:
- 0.1 to 2%,
- Cr:
- 3.00 to 9.00%,
- Al:
- 0.3 to 2.0%,
- Cu:
- 1.00 to 5%,
- Ni:
- 1.00 to 5%,
- at least one of Mo:
- 0.5 to 3%, and W:
- 2% or less (including 0%),
- S:
- 0.10% or less (not including 0%),
- wherein the following requirements (1) to (3) are satisfied in which each square bracket [ ] means a % content of each element:
- [Cr]×[C]≦3.00, (1)
- [Cu]/N11:0.5 to 2.2, (2)
- [Mo]+0.5×[W]:0.5 to 3.0%, (3)
- with the remainder being iron and unavoidable impurities.
Dependencies are inferred from the claim text.