Tialn-coated tool

A tool and coating technology, applied in the direction of coating, metal material coating process, manufacturing tools, etc., can solve the problems of tool wear, cutting edge cracking, affecting the stability of cutting edge, etc., to achieve long service life, less coating The effect of cracking and low brittleness

Active Publication Date: 2015-04-15
WALTER AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Proper selection of the parameters of the deposition process can increase the hardness and modulus of elasticity in the PVD process, but this usually results in high residual compressive stresses in the layer of the order >3 GPa, which adversely affects the stability of the cutting edge
When subjected to high stress, the cutting edge is prone to chipping at an early stage, thereby causing rapid wear of the tool

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Example 1 - Shank tool (Schaftwerkzeuge)

[0042] In this example, a solid hard metal (SHM) end mill (so-called "Tough Guy") was provided with a coating according to the invention and a comparative coating according to the prior art, and the The coated tools were compared in the test.

[0043] Specifications for Solid Carbide Metal (SHM) End Mills

[0044]

[0045]

[0046] Before coating, the substrates were first subjected to a cutting edge rounding step to a radius of 7 μm by wet spraying with glass beads.

[0047] Production of the inventive coating

[0048] First, a TiAlN intermediate coating with a thickness of 0.2 μm was deposited on the surface of the substrate by arc evaporation from a Ti-Al mixed target (Ti:Al=50:50) (bias: 100V, 4Pa nitrogen, 0.8A / cm 2 Specific evaporator flow rate, deposition temperature: 550°C). A wear-resistant protective coating according to the invention was also deposited thereon by arc evaporation, with a total layer thi...

Embodiment 2

[0063] Example 2 – Shank Tool

[0064] In this example, as in Example 1, a solid hard metal (SHM) end mill (so-called "tough guy") is provided with a coating according to the invention and a comparative coating according to the prior art , and compared the coated tools in cutting tests. Compared to Example 1, the coated end mill only has a different shape.

[0065] Before coating, the substrate was also first subjected to a cutting edge rounding step to a radius of 7 μm by wet spraying with glass beads.

[0066] Specifications for Solid Carbide Metal (SHM) End Mills

[0067]

[0068] Cutting test 2

[0069] The coated tools were compared in milling tests and the mean flank wear V was determined in an average way from two tests in each case b and maximum flank wear V b最大 . The results of the tests are presented in Table 2 below.

[0070] Work piece: 1.0503# C45 steel, about 600N / mm 2 Strength of

[0071] Cutting conditions: Tooth feed f z =0.02mm

[0072] ...

Embodiment 3

[0081] Example 3 – Shank Tool

[0082] The tool substrate coated in this example was the same as in example 1. Similarly, a TiAlN intermediate coating with a thickness of 0.2 μm was deposited on the surface of the substrate by arc evaporation from the Ti-Al mixed target (Ti:Al=50:50) (bias: 100V, 4Pa nitrogen, 0.8A / cm 2 Specific evaporator flow rate, deposition temperature: 550°C).

[0083] Compared with Example 1, from 2 Ti-Al mixed targets having a Ti:Al ratio of 50:50 via arc evaporation (2A / cm 2 specific evaporator flow rate) with a total layer thickness of 2 μm to deposit the wear-resistant protective coating according to the invention, and use 2 Al targets by double magnetron sputtering (13W / cm 2 specific power) to increase the aluminum content in the TiAlN coating (B) periodically alternating with the TiAlN coating (A) (bias: 80V, 1.5Pa nitrogen, deposition temperature: 550°C). As in Example 2, 90 Ti in which Ti:Al=50:50 x(A) Al y(A) N coating (A) and 90 Ti where...

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Abstract

A tool with a main body made of hard metal, cermet, ceramic, steel or high-speed steel and a single- or multi-layered wear resistant coating applied thereto in a PVD process, wherein at least one layer of the wear resistant coating is a titanium aluminium nitride layer, TixAlyN where x + y = 1, which can contain, depending on the process used, up to 5 percent by weight of further metals, characterised in that the TixAlyN layer is a multilayer substructure with a plurality of periodically alternating Tix (A)Aly(A)N layers (A), where x(A)+ y(A) = 1 and Tix(B)Aly(B)N layers (B), where x(B) + y(B) = 1, wherein the Al concentration y(B) in layers (B) is at most 70 atomic weight percent (y(B) <= 0.70), and wherein the Al concentration y(B) in layers (B) is 10 to 25 atomic weight percent higher than the Al concentration y(A) in layers (A) (y(B) = (y(A) + 0.10) to (y(A) + 0.25)).

Description

technical field [0001] The invention relates to a tool comprising a substrate made of hard metal, cermet, ceramic, steel or high-speed steel and a single or multilayer wear-resistant protective coating applied to said substrate by PVD technology, At least one layer of the wear-resistant protective coating is titanium aluminum nitride Ti x Al y N layers, where x+y=1. Background technique [0002] Cutting tools, in particular metal cutting tools, consist of a base body made, for example, of hard metal, cermet, ceramic, steel or high-speed steel. In order to increase the tool life or improve the cutting properties, single-layer or multi-layer wear-resistant protective coatings made of hard materials are often applied to the substrate by means of CVD or PVD processes. In the PVD process, a distinction is made between different process variants such as magnetron sputtering, arc evaporation (arc PVD), ion plating, electron beam evaporation and laser ablation. The PVD processes...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C28/04C23C28/00C23C30/00C23C14/06C23C14/34
CPCC23C28/44C23C14/0641C23C28/042C23C28/42C23C28/044C23C30/005C23C14/3464C23C14/06C23C14/34C23C28/00C23C28/04C23C30/00B23B27/14B23B2228/08B23C5/16B23C2228/08
Inventor 法伊特·席尔乌尔里希·阿尔伯斯
Owner WALTER AG
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