Carburized steel part
View Patent ↗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.
1. 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.
2. The carburized steel part according to claim 1 , wherein the base material further includes 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, and
Rem: 0.0001 to 0.015% by mass.
3. The carburized steel part according to claim 1 , wherein
the base material further includes a chemical component of B: 0.0002 to 0.005% by mass.
4. The carburized steel part according to claim 1 , wherein
the base material further includes one or more chemical components of:
Cr: 0.1 to 3.0% by mass,
Mo: 0.1 to 1.5% by mass,
Cu: 0.1 to 2.0% by mass, and,
Ni: 0.1 to 5.0% by mass.
5. The carburized steel part according to claim 1 , wherein
the base material further includes one or more chemical components of:
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.
6. The carburized steel part according to any one of claims 1 - 5 , wherein
the carburized steel part is a gear.
7. The carburized steel part according to claim 1 , wherein
the base material further includes one or more chemical components of:
Ca: 0.0002 to 0.005% by mass,
Mg: 0.0003 to 0.005% by mass,
Rem: 0.0001 to 0.015% by mass,
Cu: 0.1 to 2.0% by mass, and
V: 0.03 to 0.2% by mass.
8. The carburized steel part according to claim 1 , wherein the base material includes:
Al: 0.1 to 0.3% by mass.
9. 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.
10. The carburized steel part according to claim 9 , wherein the carburized steel part is a gear.
11. 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.
12. The carburized steel part according to claim 11 , wherein the carburized steel part is a gear.