Abrasive sawing wire, production method thereof and use of same

Patent metadata

Field	Value
Publication number	US-9623501-B2
Application number	US-201414786490-A
Country	US
Kind code	B2
Filing date	Apr 15, 2014
Priority date	May 14, 2013
Publication date	Apr 18, 2017
Grant date	Apr 18, 2017

Abstract

An abrasive wire including a steel core and an outer coating including a binder and abrasive particles, the binder being formed by at least one nickel-cobalt alloy layer having a cobalt content of between 20 wt.-% and 85 wt.-% in relation to the weight of the Ni/Co alloy.

First claim

The invention claimed is:

1. An abrasive wire comprising a steel core and an external coating comprising a binder and abrasive particles, said binder being formed of at least one layer of nickel/cobalt alloy having a cobalt content in the range from 20% to 85% by mass with respect to the mass of the Ni/Co alloy.

2. The abrasive wire of claim 1 , wherein the Ni/Co alloy comprises from 37 to 65% by mass of cobalt.

3. The abrasive wire of claim 1 , wherein the external coating comprises two layers of binder made of a Ni/Co alloy, having, independently from each other, a cobalt content in the range from 20% to 85% by mass.

4. The abrasive wire of claim 1 , wherein the Ni/Co alloy contains sulfur.

5. The abrasive wire of claim 1 , wherein the abrasive particles are made of a material selected from the group consisting of silicon carbide; silica; tungsten carbide; silicon nitride; boron nitride; chromium dioxide; aluminum oxide; diamond; and diamonds pre-coated with nickel, iron, cobalt, copper, or titanium, or with alloys thereof.

6. The abrasive wire of claim 1 , wherein the abrasive particles are formed of grains at least partly covered with a film made of a ferromagnetic material.

7. A method of manufacturing the abrasive wire of claim 1 , comprising the steps of:
electrodeposition on a steel wire of a coating comprising a binder and abrasive particles, said binder being made of a layer of nickel/cobalt alloy having a cobalt content in the range from 20% to 85% by mass relative to the mass of the Ni/Co alloy, by passing in an electrolyte bath (B 1 ) comprising at least cobalt II and nickel II ions, and abrasive particles;
optionally, electrodeposition of an additional binder layer by passing in an electrolyte batch (B 2 ) comprising at least cobalt II and nickel II ions, said additional layer being made of a Ni/Co alloy having a cobalt content in the range from 20% to 85% by mass.

8. The abrasive wire manufacturing method of claim 7 , wherein the baths (B 1 ) and (B 2 ) comprise, independently from each other, from 1 to 150 g/L of cobalt II ions and from 50 to 150 g/L of nickel II ions.

9. The abrasive wire manufacturing method of claim 7 , wherein the bath (B 1 ) comprises from 1 to 100 g/L of abrasive particles.

10. A use of the abrasive wire of claim 1 , to saw a material selected from the group consisting of silicon, sapphire, and silicon carbide.

11. The abrasive wire of claim 4 , wherein the Ni/Co alloy contains sulfur in an amount in the range from 100 to 1,000 wt·ppm.

Assignees

• Commissariat Energie Atomique
• Thermocompact Sa

Inventors

• Ly Michel
• Sanchez Gérald
• Weber Xavier

Classifications

• B24D11/00

  Constructional features of flexible abrasive materials; Special features in the manufacture of such materials · CPC title

• C25D7/0607

  Wires · CPC title

• B24D18/0018

  by electrolytic deposition · CPC title

• C25D15/00

  Electrolytic or electrophoretic production of coatings containing embedded materials, e.g. particles, whiskers, wires · CPC title

• B28D5/04

  by tools other than rotary type, e.g. reciprocating tools {(B28D5/0005 takes precedence)} · CPC title