Tool with tool body and protective layer system
View Patent ↗There is proposed a tool with a tool body and a wear resistant layer system, which layer system comprises at least one layer of MeX. Me comprises titanium and aluminum and X is nitrogen or carbon. The tool has a tool body of high speed steel (HSS) or of cemented carbide, but it is not a solid carbide end mill and not a solid carbide ball nose mill. In the MeX layer the quotient Q I as defined by the ratio of the diffraction intensity I(200) to I(111) assigned respectively to the (200) and (111) plains in the X ray diffraction of the material using θ-2θ method is selected to be ≧1. Further, the I(200) is at least twenty times larger than the intensity average noise value, both measured with a well-defined equipment and setting thereof.
1. A tool with a tool body and a wear resistant layer system, said layer system comprising at least one layer of MeX, wherein
Me comprises titanium and aluminum;
X is at least one of nitrogen and of carbon
and wherein said layer has a Q I value
Q I ≧5
and said tool body is of one of the materials
high speed steel (HSS);
cemented carbide,
and wherein said tool is not a solid carbide end mill and not a solid carbide ball nose mill
whereby the value of I (200) is at least 20 times the intensity average noise value, both measured according to MS.
2. The tool of claim 1 , wherein the tool is selected from a group consisting of a cemented carbide insert, a cemented carbide drill and a cemented carbide gear cutting tool.
3. The tool of claim 1 , wherein said MeX material is selected from the group consisting of titanium aluminum nitride, titanium aluminum carbonitride, and titanium aluminum boron nitride.
4. The tool of claim 1 , wherein Me comprises at least one further element selected from the group consisting of born, zirconium, hafnium, yttrium, silicon, tungsten, and chromium.
5. The tool of claim 4 , wherein said further element is contained in Me with a content i
0.05 at. %≦i≦60 at. %,
taken Me as 100 at. %.
6. The tool of claim 1 , further comprising a further layer of titanium nitride between said at least one layer and said tool body and wherein said further layer has a thickness d, for which there is valid
0.05 μm≦d≦5.0 μm.
7. The tool of claim 6 , wherein said layer system is formed by said at least one layer and said further layer.
8. The tool of claim 1 , wherein the stress within said at least one layer, σ, is
1 GPa≦σ≦6 GPa.
9. The tool of claim 1 , wherein the content x of titanium in said Me is:
70 at. %≧x≧40 at. %.
10. The tool of claim 1 , wherein the content y of aluminum in said Me is:
30 at. %≦y≦60 at. %.
11. The tool of claim 9 , wherein the content y of aluminum in said Me is:
30 at. %≦y≦60 at. %.
12. The tool of claim 1 , wherein Q 1 ≧10.
13. The tool of claim 1 , wherein 1 GPa≦σ≦4 GPa.
14. The tool of claim 1 , wherein 1.5 GPa≦σ≦2.5 GPa.
15. The tool of claim 1 , wherein the content of x of titanium in said Me is
65 at. %≧x≧55 at. %.
16. The tool of claim 1 , wherein the content of aluminum in said Me is
35 at. %≦y≦45 at. %.
17. The tool of claim 9 , wherein the content y of aluminum in said Me is
35 at. %≦y≦45 at. %.
18. The tool of claim 17 , wherein the content of x of titanium in said Me is
65 at. %≧x≧55 at. %.