Non-scaling heat-treatable steel and method for producing a non-scaling component from said steel

1. A method for producing a component from steel comprising:

heating a pre-product comprising a following chemical composition in weight %:

C: 0.04-0.50

Mn: 0.5-6.0

Al: >1.5-≤3.0

Si: 0.05-3.0

Cr: 0.05-3.0

Ni: less than 3.0

Cu: less than 3.0

Ti: 0.010-≤0.050

B: 0.0015-≤0.0040

P: less than 0.10

S: less than 0.05

N: less than 0.020,

remainder iron and unavoidable impurities, in a nitrogen-containing atmosphere to austenizing temperature;

lowering an oxygen content or humidity in the nitrogen-containing atmosphere to a level sufficient to keep a dew point at below 0° C. and to form a layer of Al 2 O 3 on a surface of the heated pre-product and thereby effectively inhibit scaling of iron in the pre-product; and

quenching the pre-product.

2. The method of claim 1 , wherein the level of the oxygen content or humidity in the nitrogen-containing atmosphere is such as to keep the dew point below −10° C.

3. The method of claim 1 , wherein the level of the oxygen content or humidity in the nitrogen-containing atmosphere is such as to keep the dew point below −20° C.

4. The method of claim 1 , wherein the level of the oxygen content or humidity in the nitrogen-containing atmosphere is such as to keep the dew point below −30° C.

5. The method of claim 1 , wherein the heating to austenizing temperature is realized through induction, conduction, or radiation.

6. The method of claim 1 , Fan hot or cold rolling a sheet metal to produce the pre-product.

7. The method of claim 1 , further comprising seamlessly hot rolling a tube to produce the pre-product.

8. The method of claim 1 , further comprising:

casting a melt to a pre-strip in a horizontal strip casting system; and

hot rolling the pre-strip to form the pre-product with a deformation degree of at least 50%.

9. The method of claim 8 , further comprising supplying the melt onto a rotating conveyor belt of the horizontal strip casting system at a speed which equals a speed of the rotating conveyor belt.

10. The method of claim 8 , further comprising evenly cooling all surface areas of the pre-strip, across a width of the conveyor belt so as to substantially fully solidify the ore-strip when exiting the conveyor belt.

11. The method of claim 10 , further comprising after full solidification of the pre-strip, passing the pre-strip through a homogenization zone.

12. The method of claim 11 , further comprising cutting the pre-strip into plates after undergoing homogenization.

13. The method of claim 12 , further comprising after cutting the pre-strip to plates, heating the plates to rolling temperature and subsequently rolling the plates.

14. The method of claim 11 , further comprising coiling the pre-strip after undergoing homogenization.

15. The method of claim 14 , further comprising after the coiling uncoiling the pre-strip, heating the pre-strip to rolling temperature and rolling the pre-strip.

16. The method of claim 15 , wherein the pre-strip is reheated prior to the uncoiling.

17. The method of claim 8 , further comprising subjecting the pre-strip to the rolling process in-line and subsequently coiling the pre-strip.

18. The method of claim 8 , wherein the deformation degree during rolling is >70%.

19. The method of claim 8 , wherein the deformation degree during rolling is >90%.

20. The method of claim 10 , further comprising cold rolling the pre-strip after the cooling.

21. The method of claim 1 , wherein the nitrogen containing atmosphere contains H 2 , CO and CO 2 .