Carburized steel part
AssigneeNippon Steel & Sumitomo Metal Corporation
InventorsKei Miyanishi, Toshiharu Aiso
Life of this patent
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Abstract
The present invention provides a carburized steel part obtained by subjecting a base material to a cutting operation and a carburizing operation, in which the base material includes chemical components of: C: greater than 0.3 but less than or equal to 0.6% by mass; Si: 0.01 to 1.5% by mass; Mn: 0.3 to 2.0% by mass; P: 0.0001 to 0.02% by mass; S: 0.001 to 0.15% by mass; N: 0.001 to 0.03% by mass; Al: greater than 0.06 but less than or equal to 0.3% by mass; and, O: 0.0001 to 0.005% by mass, with a balance including iron and inevitable impurities, and in which the carburized steel part has a hardness of HV550 to HV800 in a surface layer portion, and a hardness of HV400 to HV550 in a core portion.
Claims12
A carburized steel part obtained by subjecting a base material to a cutting operation and a carburizing operation, wherein
- the base material includes chemical components of:
- C:
- 0.51 to 0.6% by mass;
- Si:
- 0.01 to 1.5% by mass;
- Mn:
- 0.3 to 2.0% by mass;
- P:
- 0.0001 to 0.02% by mass;
- S:
- 0.001 to 0.15% by mass;
- N:
- 0.001 to 0.03% by mass;
- Al:
- greater than 0.06 but less than or equal to 0.3% by mass;
- and,
- O:
- 0.0001 to 0.005% by mass,
- with a balance including iron and inevitable impurities, and wherein
- the carburized steel part has a hardness of HV550 to HV800 in a surface layer portion, and a hardness of HV400 to HV550 in a core portion.
A carburized steel part obtained by subjecting a base material to a cutting operation and a carburizing operation, wherein
- the base material consists of chemical components of:
- C:
- 0.51 to 0.6% by mass;
- Si:
- 0.01 to 1.5% by mass;
- Mn:
- 0.3 to 2.0% by mass;
- P:
- 0.0001 to 0.02% by mass;
- S:
- 0.001 to 0.15% by mass;
- N:
- 0.001 to 0.03% by mass;
- Al:
- greater than 0.06 but less than or equal to 0.3% by mass;
- and,
- O:
- 0.0001 to 0.005% by mass;
- and
- one or more chemical components of:
- Ca:
- 0.0002 to 0.005% by mass;
- Zr:
- 0.0003 to 0.005% by mass;
- Mg:
- 0.0003 to 0.005% by mass;
- Rem:
- 0.0001 to 0.015% by mass;
- B:
- 0.0002 to 0.005% by mass;
- Cr:
- 0.1 to 3.0% by mass;
- Mo:
- 0.1 to 1.5% by mass;
- Cu:
- 0.1 to 2.0% by mass;
- Ni:
- 0.1 to 5.0% by mass;
- Ti:
- 0.005 to 0.2% by mass;
- Nb:
- 0.01 to 0.1% by mass;
- and
- V:
- 0.03 to 0.2% by mass,
- with a balance consisting of iron and inevitable impurities, and wherein
- the carburized steel part has a hardness of HV550 to HV800 in a surface layer portion, and a hardness of HV400 to HV550 in a core portion.
A carburized steel part obtained by subjecting a base material to a cutting operation and a carburizing operation, wherein
- the base material consists of chemical components of:
- C:
- 0.51 to 0.6% by mass;
- Si:
- 0.01 to 1.5% by mass;
- Mn:
- 0.3 to 2.0% by mass;
- P:
- 0.0001 to 0.02% by mass;
- S:
- 0.001 to 0.15% by mass;
- N:
- 0.001 to 0.03% by mass;
- Al:
- greater than 0.06 but less than or equal to 0.3% by mass;
- and,
- O:
- 0.0001 to 0.005% by mass,
- with a balance consisting of iron and inevitable impurities, and wherein
- the carburized steel part has a hardness of HV550 to HV800 in a surface layer portion, and a hardness of HV400 to HV550 in a core portion.
Dependencies are inferred from the claim text.