METHOD FOR PRODUCING A COMPONENT FROM AN AIR-HARDENABLE STEEL AND COMPONENT PRODUCED THEREWITH
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Abstract
A component of an air-hardenable steel composed of (contents in mass %): C<0.20; Al<0.08; Si<1.00; Mn 1.20 to <2.50; P<0.020; S<0.015; N<0.0150; Cr 0.30 to <1.5; Mo 0.10 to <0.80; Ti 0.010 to <0.050; V 0.03 to <0.20; B 0.0015 to <0.0060, with the remainder being iron including the usual elements present in steel, is produced by heating a hot- or cold-rolled steel sheet or steel tube section to a temperature of θblank=800 to 1050° C. and then forming the sheet or tube into a component in a forming tool. After removal from the tool, the component is cooled down in air while the component still has a temperature above θremoval=200° C. and below 800° C. The component achieves the required mechanical properties during air-cooling.
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Citations
19 Claims
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1-9. -9. (canceled)
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10. A method for producing components from an air-hardenable steel comprising the following elements (composition in mass-%):
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C≦
0.20Al≦
0.08Si≦
1.00Mn 1.20 to ≦
2.50P≦
0.020S≦
0.015N≦
0.0150Cr 0.30 to ≦
1.5Mo 0.10 to ≦
0.80Ti 0.010 to ≦
0.050V 0.03 to ≦
0.20B 0.0015 to ≦
0.0060remainder iron, including typical elements in steel production, the method comprising the steps of; heating a hot-rolled or cold-rolled steel sheet blank or steel tube blank to a temperature of θ
blank=800 to 1050°
C.,forming the hot-rolled or cold-rolled steel sheet blank or steel tube blank into a component in a forming tool, removing the formed component from the forming tool, and cooling the formed component down in air after removal from the forming tool, while the component has a temperature above θ
Removal=200°
C. and below 800°
C.,thereby hardening the component during cooldown in air to attain required mechanical properties. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18)
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19. A component made from air-hardenable steel from an air-hardenable steel comprising the following elements (composition in mass-%):
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C≦
0.20Al≦
0.08Si≦
1.00Mn 1.20 to ≦
2.50P≦
0.020S≦
0.015N≦
0.0150Cr 0.30 to ≦
1.5Mo 0.10 to ≦
0.80Ti 0.010 to ≦
0.050V 0.03 to ≦
0.20B 0.0015 to ≦
0.0060remainder iron, including typical elements in steel production, wherein hot-rolled or cold-rolled steel sheet blank or steel tube blank is heated to a temperature of θ
blank=800 to 1050°
C.,the component is formed from the hot-rolled or cold-rolled steel sheet blank or steel tube blank in a forming tool, the formed component is removed from the forming tool and cooled down in air after while having a temperature above θ
Removal=200°
C. and below 800°
C. after removal from the forming tool,thereby hardening the component during cooldown in air to attain required mechanical properties.
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Specification