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1. WO2020117748 - ALLIAGES D'ALUMINIUM 6XXX

Note: Texte fondé sur des processus automatiques de reconnaissance optique de caractères. Seule la version PDF a une valeur juridique

[ EN ]

CLAIMS

What is claimed is:

1. A 6xxx aluminum alloy comprising:

0.65 - 0.85 wt. % Si;

0.40 - 0.59 wt. % Mg;

wherein (wt. % Mg) / (wt. % Si) is from 0.47 to 0.90;

0.05 - 0.35 wt. % Fe;

0.04 - 0.13 wt. % Mn;

0 - 0.20 wt. % Cu;

0 - 0.15 wt. % Cr;

0 - 0.15 wt. % Zr;

0 - 0.15 wt. % Ti;

0 - 0.10 wt. % Zn;

0 - 0.05 wt. % V;

the balance being aluminum and impurities.

2. The 6xxx aluminum alloy of claim 1, wherein the 6xxx aluminum alloy includes at least 0.675 wt. % Si, or at least 0.70 wt. % Si.

3. The 6xxx aluminum alloy of any of the preceding claims, wherein the 6xxx aluminum alloy includes not greater than 0.825 wt. % Si, or not greater than 0.80 wt. % Si.

4. The 6xxx aluminum alloy of any of the preceding claims, wherein the 6xxx aluminum alloy includes at least 0.425 wt. % Mg, or at least 0.45 wt. % Mg, 0.475 wt. % Mg, or at least 0.50 wt. % Mg.

5. The 6xxx aluminum alloy of any of the preceding claims, wherein the 6xxx aluminum alloy includes not greater than 0.57 wt. % Mg.

6. The 6xxx aluminum alloy of any of the preceding claims, wherein the (wt. % Mg) / (wt. % Si) is at least 0.50, or at least 0.52, or at least 0.54, or at least 0.56, or at least 0.58, or at least 0.60.

7. The 6xxx aluminum alloy of any of the preceding claims, wherein the (wt. % Mg) / (wt. % Si) is not greater than 0.88, or not greater than 0.86, or not greater than 0.84, or not greater than 0.82.

8. The 6xxx aluminum alloy of any of the preceding claims, wherein the 6xxx aluminum alloy includes at least 0.08 wt. % Fe.

9. The 6xxx aluminum alloy of any of the preceding claims, wherein the 6xxx aluminum alloy includes not greater than 0.32 wt. % Fe, or not greater than 0.28 wt. % Fe, or not greater

than 0.26 wt. % Fe.

10. The 6xxx aluminum alloy of any of the preceding claims, wherein the 6xxx aluminum alloy includes at least 0.02 wt. % Cu, or at least 0.04 wt. % Cu, or at least 0.06 wt. % Cu, or at least 0.07 wt. % Cu, or at least 0.08 wt. % Cu, or at least 0.09 wt. % Cu.

11. The 6xxx aluminum alloy of any of the preceding claims, wherein the 6xxx aluminum alloy includes not greater than 0.19 wt. % Cu, or not greater than 0.18 wt. % Cu, or not greater than 0.17 wt. % Cu.

12. The 6xxx aluminum alloy of any of the preceding claims, wherein the 6xxx aluminum alloy includes at least 0.05 wt. % Mn or at least 0.06 wt. % Mn.

13. The 6xxx aluminum alloy of any of the preceding claims, wherein the 6xxx aluminum alloy includes not greater than 0.12 wt. % Mn or not greater than 0.11 wt. % Mn, or not greater than 0.10 wt. % Mn.

14. The 6xxx aluminum alloy of any of the preceding claims, wherein the 6xxx aluminum alloy includes at least 0.01 wt. % Cr, or at least 0.02 wt. % Cr.

15. The 6xxx aluminum alloy of any of the preceding claims, wherein the 6xxx aluminum alloy includes not greater than 0.10 wt. % Cr, or not greater than 0.08 wt. % Cr, or not greater than 0.06 wt. % Cr, or not greater than 0.05 wt. % Cr.

16. The 6xxx aluminum alloy of any of the preceding claims, wherein the 6xxx aluminum alloy includes not greater than 0.10 wt. % Zr, or not greater than 0.05 wt. % Zr, or not greater than 0.03 wt. % Zr, or not greater than 0.01 wt. % Zr.

17. The 6xxx aluminum alloy of any of the preceding claims, wherein the 6xxx aluminum alloy includes not greater than 0.10 wt. % Ti, or not greater than 0.08 wt. % Ti, or not greater than 0.05 wt. % Ti.

18. The 6xxx aluminum alloy of any of the preceding claims, wherein the 6xxx aluminum alloy includes not greater than 0.05 wt. % Zn, or not greater than 0.03 wt. % Zn, or not greater than 0.01 wt. % Zn.

19. The 6xxx aluminum alloy of any of the preceding claims, wherein the 6xxx aluminum alloy includes not greater than 0.03 wt. % V, or not greater than 0.01 wt. % V.

20. The 6xxx aluminum alloy of any of the preceding claims, wherein the 6xxx aluminum alloy includes not greater than 0.15 wt. %, in total, of the impurities, and wherein the 6xxx aluminum alloy includes not greater than 0.05 wt. % of each of the impurities.

21. The 6xxx aluminum alloy of any of the preceding claims, wherein the 6xxx aluminum alloy includes not greater than 0.10 wt. %, in total, of the impurities, and wherein the 6xxx aluminum alloy includes not greater than 0.03 wt. % of each of the impurities.

22. A 6xxx aluminum alloy comprising:

0.70 - 0.80 wt. % Si;

0.49 - 0.59 wt. % Mg;

wherein (wt. % Mg) / (wt. % Si) is from 0.61 to 0.84;

0.09 - 0.29 wt. % Fe;

0.06 - 0.10 wt. % Mn;

0.09 - 0.17 wt. % Cu;

0.01 - 0.05 wt. % Cr;

0.01 - 0.05 wt. % Ti;

not greater than 0.05 wt. % Zn;

not greater than 0.05 wt. % V;

not greater than 0.05 wt. % Zr;

the balance being aluminum and impurities.

23. A method comprising:

(a) casting the 6xxx aluminum alloy of any of claims 1-22 as a cast product;

(b) hot rolling the cast product to an intermediate gauge product, wherein either:

(i) an exit temperature of the intermediate gauge product is not greater than 290°C and wherein an anneal of the intermediate gauge product is completed after the hot rolling; or

(ii) an exit temperature of the intermediate gauge product is from 400 to

480°C;

(c) cold rolling the intermediate gauge product to a final gauge product;

wherein the intermediate gauge product has an as-received thickness;

wherein the final gauge product has a final thickness;

wherein the cold rolling comprises reducing the as-received thickness by at least 50% to achieve the final thickness.

24. The method of claim 23, comprising:

after the cold rolling, solution heat treating and then quenching the final gauge product;

wherein the solution heat treating comprises heating the final gauge product to a peak metal temperature;

wherein the peak metal temperature is not greater than 593°C.

25. The method of claim 24, comprising:

after the quenching, artificially aging the final gauge product.

26. The method of claim 24, wherein the artificial aging comprises paint baking.

27. The method of claim 23, comprising:

after the quenching, natural aging the final gauge product for at least 3 days.

28. The method of claim 23, wherein the final gauge product realizes a predominately recrystallized microstructure.

29. The method of claim 28, wherein the final gauge product realizes an area weighted average grain size of not greater than 45 micrometers, or not greater than 40 micrometers.

30. The method of claim 29, wherein the final gauge product realizes an area weighted average grain size of at least 20 micrometers, or at least 25 micrometers, or at least 30 micrometers.

31. The method of claim 28, wherein the final gauge product comprises at least 10% Cube texture.

32. A 6xxx aluminum alloy sheet product comprising:

0.65 - 0.85 wt. % Si;

0.40 - 0.59 wt. % Mg;

wherein (wt. % Mg) / (wt. % Si) is from 0.47 to 0.90;

0.05 - 0.35 wt. % Fe;

0.04 - 0.13 wt. % Mn;

0 - 0.20 wt. % Cu;

0 - 0.15 wt. % Cr;

0 - 0.15 wt. % Zr;

0 - 0.15 wt. % Ti;

0 - 0.10 wt. % Zn;

0 - 0.05 wt. % V;

the balance being aluminum and impurities;

wherein the 6xxx aluminum alloy sheet product has a thickness of from 1.5 to 4.0 mm;

wherein the 6xxx aluminum alloy sheet product has a predominately recrystallized microstructure;

wherein the 6xxx aluminum alloy sheet product realizes a weighted average grain size of from 5 to 45 micrometers; and

wherein the 6xxx aluminum alloy sheet product comprises at least 10% Cube texture.