Method of making grooving or parting insert

a cutting tool and insert technology, applied in the field of cemented carbide inserts, can solve the problems of difficult to improve the plurality of preferred tool properties simultaneously, bulky and edge line breakage, and abrasion wear, and achieve the effect of excellent cutting performance in grooving

Inactive Publication Date: 2009-08-18
SANDVIK INTELLECTUAL PROPERTY AB
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0011]It has now surprisingly been found that a combination of a modified cemented carbide substrate described in the above mentioned U.S. Pat. No. 6,062,776 and the coating described in the above mentioned SE 9901149-6 results in excellent cutting performance in grooving or, in particular, parting of steel, including stainless steel.

Problems solved by technology

Examples of such mechanisms include chemical wear, abrasive wear, adhesive wear and edge chipping.
In bad cutting conditions problems with bulk and edge line breakage commonly occur.
It has been very difficult to improve all of the plurality of preferred tool properties simultaneously.

Method used

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  • Method of making grooving or parting insert
  • Method of making grooving or parting insert

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0024]A. A cemented carbide parting tool insert in accordance with the present invention with a composition of 12.6 wt-% Co, 1.25 wt-% TaC, 0.30 wt-% NbC and balance WC with a 1.4 μm grain size and with a binder phase alloyed with W corresponding to a CW-ratio of 0.91 was coated with a 4 μm thick coating by applying a conventional PVD cathodic arc technique. The coating considered of a first (innermost) 0.2 μm layer of TiN followed by a 3.2 μm thick second layer comprising 23 alternating sublayers (TixAl1-x)N, where x alternatively varied between 0.55 and 0.75, a third layer 0.2 μm (TixAl1-x)N, where x=0.55, and, finally, an outermost 0.4 μm layer of TiN.

[0025]B. A cemented carbide parting tool insert not of the present invention with a composition of 8.0 wt-% Co, no cubic carbides, balance WC and a CW-ratio of 0.94. The insert was coated with an innermost 0.5 μm equiaxed TiCN-layer. A 1.5 μm TiN layer was deposited, during the same cycle, on top of the TiCN-layer. No post treatment...

example 2

[0029]Inserts A and B were tested at an end user's machine shop in a parting of a stainless steel component (AISI 316 OD 42 mm). The cutting speed was varied from 110 to 0 m / min with a feed rate varying from 0.08 to 003 mm / r. The low feed rate was used close to the center of the bar. The wear mechanism was fracture in the cutting zone.

[0030]

InsertNumber of componentsA201B224

example 3

[0031]Inserts A and B were tested at an end user's machine shop in a parting of a steel component (SS2172 OD 47 mm). The rotating speed was 1800 rpm with a feed rate of 0.1 mm / r. The wear mechanism was flank wear and flaking.

[0032]

InsertNumber of componentsA163B50

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Abstract

A method of making a cutting tool, the cutting tool having a WC—Co based cemented carbide body and a multi-layer coating, the method including: applying a first innermost bonding layer TiN to the body; applying a second layer in the form of a mutlilayered structure having sublayers of (TixAl1-x)N were x varies according to 0.45<x<0.55 and 0.70<x<0.80; applying a third layer of (TixAl1-x)N where x is 0.45<x<0.55; and applying a forth outermost layer on TiN.

Description

CROSS-REFERENCES TO RELATED APPLICATIONS [0001]The present application is a reissue of U.S. Pat. No. 6,627,049 B2, filed Oct. 30, 2001, which is a divisional application of U.S. Pat. No. 6,342,291, filed Aug. 31, 2000, which claims the benefit of priority of Swedish Application No. 9903089-2 filed Sep. 1, 1999. <?insert-end id="INS-S-00001" ?>[0002]This application is a divisional of U.S. application Ser. No. 09 / 652,026 filed on Aug. 31, 2000, now U.S. Pat. No. 6,342,291.BACKGROUND OF THE INVENTION[0003]1. Field of the Invention[0004]The present invention relates to a coated cutting tool (cemented carbide insert) useful for grooving or parting of steel components, such as bars or tubes, not only of stainless steels of different compositions and micostructures but also of non-stainless steels such as low carbon steels and low and medium alloyed steels.[0005]2. Description of Related Art[0006]In the discussion of the state of the art that follows, reference is made to certain st...

Claims

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Application Information

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Patent Type & AuthorityPatents(United States)
IPC IPC(8): C23C14/34B23B27/14B22F7/00C22C29/08C23C14/06C23C14/16C23C16/34C23C30/00
CPCC22C29/08C23C14/0641C23C16/34C23C30/005B22F2005/001Y10T428/24975Y10T428/265Y10T428/30Y10T428/252
InventorJONSSON, ANDERSPIIRHONEN, ANDERSSELINDER, TORBJORNKULLANDER, GREGORY
OwnerSANDVIK INTELLECTUAL PROPERTY AB