Cold-work die steel and die
AssigneesKabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.), Nippon Koshuha Steel Co., Ltd.
InventorsShogo Murakami, Shigenobu Namba, Kenji Yamamoto, Tsuyoshi Tonomura
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Abstract
The present invention relates to a cold-work die steel, comprising by mass %: 0.5 to 0.7% of C; 0.5 to 2.0% of Si; 0.1 to 2.0% of Mn; 5 to 7% of Cr; 0.01 to 1.0% of Al; 0.003 to 0.025% of N; 0.25 to 1% of Cu; 0.25 to 1% of Ni; 0.5 to 3% of Mo; 2% or less (including 0%) of W; and 0.1% or less (excluding 0%) of S, with a remainder being iron and an unavoidable impurity; wherein the following requirements (1) to (3) are satisfied: (1) [Cr]×[C]≦4; (2) [Al]/[N]: 1 to 30; and (3) [Mo]+0.5×[W]: 0.5 to 3.00%, wherein the bracket means a content (%) of an element written therein.
Claims5
A cold-work die steel, comprising by mass %:
- 0.5 to 0.7% of C;
- 0.5 to 2.0% of Si;
- 0.1 to 2.0% of Mn;
- 5 to 7% of Cr;
- 0.01 to 1.0% of Al;
- 0.003 to 0.025% of N;
- 0.25 to 1% of Cu;
- 0.25 to 1% of Ni;
- 0.5 to 3% of Mo and 2% or less (including 0%) of W;
- and
- 0.1% or less (excluding 0%) of S,
- with a remainder being iron and an unavoidable impurity;
- wherein the following requirements (1) to (3) are satisfied:
- [Cr]×[C]≦4;
- (1)
- [Al]/[N]:
- 1 to 30;
- and (2)
- [Mo]+0.5×[W]:
- 0.5 to 3.00%, (3)
- wherein the bracket means a content (%) of an element written therein.
3-4. (canceled)
Dependencies are inferred from the claim text.