A method for manufacturing a work roller for rolling metal products, a rolling mill, a metal strip, a work roller, and the use of a work roller.
Patent Information
- Authority / Receiving Office
- JP · JP
- Patent Type
- Applications
- Current Assignee / Owner
- SMS GROUP GMBH
- Filing Date
- 2024-05-17
- Publication Date
- 2026-06-17
Smart Images
Figure 2026519653000001_ABST
Abstract
Claims
1. A working roller (1) for rolling metal products, particularly for rolling metal strips, - A base body (4) made of metal, and - A work roller (1) having at least partially disposed on the base body (4), wherein the wear protection layer (2) is a thermal spray protective layer, and both the wear protection layer and the base body have residual stress, The abrasion protection layer (2) and / or the base body (4) have a load capacity of 200 N / mm ２ In summary, preferably 300 N / mm ２ In particular, 500 N / mm is preferred. ２ A work roller (1) characterized by having a residual compressive stress of the above value.
2. The abrasion protection layer (2) and / or the base body (4) have a load capacity of 2,000 N / mm ２ The following is preferably 1,500 N / mm ２ In particular, 1,000 N / mm is preferred. ２ The work roller (1) according to claim 1, characterized in that it has a residual compressive stress of the following value.
3. The work roller (1) according to claim 1 or 2, characterized in that the wear protection layer (2) has a chromium content of 90% by weight or less, preferably 60% by weight or less, and particularly preferably 30% by weight or less.
4. The work roller (1) according to any one of claims 1 to 3, characterized in that the wear protection layer (2) has a nickel content of 90% by weight or less, preferably 60% by weight or less, and particularly preferably 30% by weight or less.
5. The abrasion protection layer (2) has an arithmetic mean roughness value R ａ The surface thickness is 0.01 μm or more, preferably 0.5 μm or more, and particularly preferably 1.5 μm or more, and / or the arithmetic mean roughness value R ａ A work roller (1) according to any one of claims 1 to 4, characterized in that it has an outer surface with a thickness of 17 μm or less, preferably 10 μm or less, and particularly preferably 6 μm or less.
6. The work roller (1) according to any one of claims 1 to 5, characterized in that the wear protection layer (2) has a particle diameter of 2 μm or more, preferably 5 μm or more, and / or 50 μm or less, preferably 45 μm or less, and particularly preferably 30 μm or less or 20 μm or less.
7. The work roller (1) according to any one of claims 1 to 6, characterized in that the wear protection layer (2) has tungsten carbide (WC) in a proportion of 50% by weight or more, preferably 60% by weight or more, and particularly preferably 70% by weight or more.
8. The wear protection layer (2) has tungsten deposits, particularly elemental tungsten (W) and / or tungsten carbide (W ２ C), at a ratio of 50% by weight or less, preferably 33% by weight or less, particularly preferably 10% by weight or less or 5% by weight or less. The working roller (1) according to any one of claims 1 to 7, characterized by this.
9. The work roller (1) according to any one of claims 1 to 8, characterized in that the wear protection layer (2) has a layer thickness of 2 μm or more, preferably 5 μm or more, particularly preferably 10 μm or more, and / or a layer thickness of 80 μm or less, preferably 40 μm or less, particularly preferably 15 μm or less.
10. The abrasion protection layer (2) has a load capacity of 60 N / mm ２ In summary, preferably 70 N / mm ２ In particular, 80 N / mm ２ Or 100 N / mm ２ A work roller (1) according to any one of claims 1 to 9, characterized in that it has a fixation tensile resistance of the above fixation tensile value.
11. The work roller (1) according to any one of claims 1 to 10, characterized in that the wear protection layer (2) has a porosity of 1% or less, preferably 0.5% or less, and particularly preferably 0.1% or less.
12. The work roller (1) according to any one of claims 1 to 11, characterized in that the wear protection layer (2) has a permeability of 1% or less, preferably 0.5% or less, and particularly preferably 0.1% or less.
13. The work roller (1) according to any one of claims 1 to 12, characterized in that the wear protection layer (2) has a layer hardness value of 800 HV or more, preferably 1000 HV or more, particularly preferably 1100 HV or more, and / or a layer hardness value of 1600 HV or less, preferably 1500 HV or less, particularly preferably 1400 HV or less.
14. The abrasion protection layer (2) has a deviation of 40% or less, preferably 30% or less, and particularly preferably 20% or less from the weight ratio of coating elements averaged over the total number of analysis locations, at 80% or more of the analysis locations, preferably 90% or more of the analysis locations, and the total number of analysis locations is 5 or more, preferably 15 or more, and particularly preferably 25 or more, and the coating elements are tungsten carbide (WC), aluminum oxide (Al) as elements. ２ O ３ ), zirconium oxide (ZrO ２ ), chromium carbide (Cr ３ C ２ , Cr ７ C ３ and / or Cr ２３ C ６ A work roller (1) according to any one of claims 1 to 13, characterized in that it is one of the following: ) or vanadium carbide (VC).
15. The work roller (1) according to any one of claims 1 to 14, characterized in that the wear protection layer (2) has a thickness deviation of 20% or less, preferably 10% or less, and particularly preferably 5% or less from the layer thickness of the wear protection layer (2) averaged over the total number of measurement locations at 80% or more of the measurement locations, preferably 90% or more of the measurement locations, and the total number of measurement locations is 10 or more, preferably 25 or more, and particularly preferably 40 or more.
16. The work roller (1) according to any one of claims 1 to 15, characterized in that the wear protection layer (2) has a thickness tolerance of 1 μm or less, preferably 0.5 μm or less, and particularly preferably 0.2 μm or less.
17. The work roller (1) according to any one of claims 1 to 16, characterized in that the wear protection layer (2) has a hard phase and a matrix, and the hard phase is contained within the matrix.
18. The work roller (1) according to any one of claims 1 to 17, wherein the wear protection layer (2) has a hard phase and a matrix, and is characterized in that the ratio of the hard phase to the entire layer system consisting of the hard phase and matrix is 40 volume% or more, preferably 50 volume% or more, and particularly preferably 60 volume% or more, and / or the ratio of the hard phase to the entire layer system is 90 volume% or less, preferably 85 volume% or less, and particularly preferably 80 volume% or less or 75 volume% or less.
19. The abrasion protection layer (2) comprises tungsten carbide (WC), aluminum oxide (Al) as elements. ２ O ３ ), zirconium oxide (ZrO ２ ), chromium carbide (Cr ３ C ２ , Cr ７ C ３ and / or Cr ２３ C ６ ), vanadium carbide (VC), silicon carbide (SiC), tungsten boride (WB), chromium oxide (CrO, Cr ２ O ３ ,CrO ２ and / or CrO ３ ), titanium carbide (TiC), titanium oxide (TiO, Ti ２ O ３ and / or TiO ２ ), or molybdenum carbide (Mo ２ Having at least one, two, three, four, five, six, seven or more of C and / or MoC, particularly tungsten carbide (WC), aluminum oxide (Al) as elements. ２ O ３ ), zirconium oxide (ZrO ２ ), chromium carbide (Cr ３ C ２ , Cr ７ C ３ and / or Cr ２３ C ６ A work roller (1) according to any one of claims 1 to 18, characterized in that it has at least one, two, three, four or more of the following: ) and / or vanadium carbide (VC).
20. The work roller (1) according to any one of claims 1 to 19, characterized in that the wear protection layer (2) and / or the base body (4) have a peak number of RPc values of 1 / cm or more, preferably 30 / cm or more, particularly preferably 60 / cm or more, and / or a peak number of RPc values of 300 / cm or less, preferably 250 / cm or less, particularly preferably 200 / cm or less.
21. The abrasion protection layer (2) contains an oxide, particularly aluminum oxide (Al), in a proportion of 5% by weight or less, preferably 3% by weight or less, and especially preferably 1.5% by weight or less. ２ O ３ ) and / or zirconium oxide (ZrO ２ ) and / or chromium oxide (CrO, Cr ２ O ３ , and / or CrO ３ ) and / or titanium oxide (TiO, Ti ２ O ３ and / or TiO ２ A work roller (1) according to any one of claims 1 to 20, characterized by having ).
22. The base body (4) has an arithmetic mean roughness value R of 0.1 μm or more, preferably 0.2 μm or more, and particularly preferably 0.3 μm or more. ａ , and / or an arithmetic mean roughness value R of 14 μm or less, preferably 4.0 μm or less, and particularly preferably 0.8 μm or less. ａ A work roller (1) according to any one of claims 1 to 21, characterized in that it has an outer surface to be coated.
23. The work roller (1) according to any one of claims 1 to 22, characterized in that the base body (4) has a base body hardness of 35 HRC or more, preferably 40 HRC or more, particularly preferably 50 HRC or more, and / or a base body hardness of 70 HRC or less, preferably 65 HRC or less, particularly preferably 60 HRC or less.
24. A rolling mill having a work roller (1) according to any one of claims 1 to 23.
25. It is a metal strip, The metal strip is cold-rolled by a work roller (1) according to any one of claims 1 to 23.
26. A method for manufacturing a work roller (1) according to any one of claims 1 to 23, - The step of providing the base body (4), - The step of applying the abrasion protection layer (2) by a thermal spraying process A method of having.
27. The method according to claim 26, characterized in that the wear protection layer (2) is polished and smoothed after being applied.
28. Use of the work roller (1) according to any one of claims 1 to 23 for cold rolling a metal strip.