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Insert for metal cutting

A technology of cutting inserts, inserts, applied in the field of intermediate and finishing, coarse and coated inserts of less chip-removing materials, which can solve problems such as limiting heat resistance and wear resistance

Inactive Publication Date: 2006-01-11
SECO TOOLS AB
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This binder-rich surface area broadens the application range of hard machining, but limits its own heat resistance and wear resistance

Method used

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  • Insert for metal cutting
  • Insert for metal cutting
  • Insert for metal cutting

Examples

Experimental program
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Effect test

example

[0024] Inserts tested in the following instances:

[0025] "A" inserts according to the present invention have a binder-rich surface region on the cutting edge and clearance faces, but no binder-phase-rich surface region on the rake face;

[0026] "B" inserts of the prior art, having a binder-phase-rich surface region on all surfaces bounding the cutting edge;

[0027] The "C" inserts, outside of the present invention, had no binder phase rich surface area on all surfaces.

[0028] The above test inserts A, B and C all had a cemented carbide body of similar chemical structure and similar physical overall properties.

example 1

[0030] Blade "A" according to the invention was tested against blades "B" and "C". The total composition of the blade includes: 5.3 wt% Co, 3.3 wt% Ta, 2.1 wt% Nb, 2.0 wt% Ti, 6.0 wt% C, 0.2 wt% N and W as balance weight. The surface area of ​​the insert base consists of a 25 μm thick binder-phase-rich fraction with little cubic carbonitride phase. After removal of the binder phase-rich surface region on the rake face surface, these substrates were coated with a 7 μm thick layer of TiC x N y o z layer, a layer of 5 μm thick AL composed of α-phase 2 o 3 layer as well as depositing 0.5 μm thick nitrogen-enriched TiC x N y o z outer layer.

[0031] These inserts were tested under the following conditions:

[0032] Workpiece: Cylindrical slotted rod

[0033] Material: SS1672-08, starting diameter 160mm

[0034] Blade type: CNMA120408

[0035] Cutting speed: 140m / min

[0036] Feed speed: increased from 0.1mm / rev to 1.0mm / rev

[0037] Cutting depth: 2.0mm

[0038] Cut...

example 2

[0044] A, B and C inserts are compared in continuous metal cutting during ramp up. The blade base comprises: 7.6% by weight Co, 2.2% by weight Ta, 2.0% by weight Nb, 1.5% by weight Ti. The surface area of ​​the insert base consists of a 30 μm thick binder-phase-rich fraction with little cubic carbonitride phase. After removing the gradient regions on selected surfaces, these substrates were coated with a 5 μm thick layer of TiC x N y o z layer, a layer of 8 μm thick α-Al 2 o 3 layer, and deposited 0.5 μm thick nitrogen-enriched TiC x Ny o z outer layer.

[0045] The test conditions are as follows:

[0046] Workpiece: cylindrical rod

[0047] Material: SS1672-08

[0048] Blade type: TPUN160308

[0049] Cutting speed: 300-550m / min

[0050] Feed speed: 0.3mm / rev

[0051] Cutting depth: 2.5mm

[0052] Cutting length: 10mm

[0053] Remarks: no coolant is used

[0054] Plastic deformation and / or flank wear (vbn) is detected at the point where the nose radius begins a...

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Abstract

The present invention relates to a coated cutting insert for metalworking, especially machining of low-chip materials, etc., comprising a tungsten carbide substrate having a binder-phase-rich surface region, having at least one rake face and at least one clearance face, intersecting Form the cutting edge. The binder phase-rich surface region is at least partially absent from the rake face comprising at least a portion of the surface extending from the cutting edge. The strength and wear resistance of the cutting edge can thus be optimized.

Description

technical field [0001] The invention relates to a hard alloy cutting insert with a coating, which is especially suitable for rough, intermediate and finishing machining of less chip-removing materials such as steel and cast iron. In particular, the present invention relates to a coated insert in which a hard surface area is provided on only a portion of the substrate, resulting in increased cutting edge strength on certain surface areas and increased wear resistance on other surface areas of the same insert performance. Background technique [0002] Currently, for example, US Pat. Nos. 4,227,283, 4,610,931 and 4,548,786 disclose coated carbide inserts with a binder phase-rich surface region, generally for turning metals and alloys. This binder-rich surface area broadens the application range of hard machining, but limits its heat resistance and wear resistance. [0003] Typically, machining of low chip removal materials by coated carbide tools is performed using inserts wi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23B27/14B23B27/22C23C16/40B22F3/00C23C14/08C23C30/00
CPCC23C30/005Y10T428/31678Y10T428/265Y10T428/24942Y10T428/24975B23B27/14
Inventor 西尔维娅·达伦德安德烈亚斯·拉尔森
Owner SECO TOOLS AB
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