Saw blade or cut-off wheel made of martensitic stainless steel or steel

Patent metadata

Field	Value
Publication number	US-9649705-B2
Application number	US-201313913560-A
Country	US
Kind code	B2
Filing date	Jun 10, 2013
Priority date	Jul 13, 2012
Publication date	May 16, 2017
Grant date	May 16, 2017

Abstract

A saw blade or a cut-off wheel for an oscillating tool machine includes a base body, wherein the base body has a cutting area and the cutting area is coated with a granulated carbide, wherein the base body is formed in one piece and includes martensitic stainless steel and/or martensitic steel.

First claim

What is claimed is:

1. A circular saw blade or a cut-off wheel for a tool machine, the saw blade or the cut-off wheel comprising:
a base body, wherein the base body has a cutting area, and wherein the base body is formed in one piece and comprises martensitic stainless steel and/or martensitic steel that was transformed from stainless steel and/or steel during a hardening process; and
a granulated carbide coating disposed on the cutting area, wherein the granulated carbide coating is soldered to the base body and the base body is hardened in only one single soldering and hardening process comprising heating and subsequent cooling so that the saw blade or the cut-off wheel comprises substantially no distortion.

2. The saw blade or the cut-off wheel according to claim 1 , wherein the saw blade or the cut-off wheel essentially consists of martensitic stainless steel and/or martensitic steel.

3. The saw blade or the cut-off wheel according to claim 1 , wherein the stainless steel and/or steel comprises 12% to 18% Chromium (Cr) and more than 0.1% Carbon (C).

4. The saw blade or the cut-off wheel according to claim 1 , wherein the base body has a hardness of approximately 450 HV.

5. The saw blade or the cut-off wheel according to claim 1 , wherein the base body is pickled, ground and/or polished.

6. The saw blade or the cut-off wheel according to claim 1 , wherein a solder layer comprises a copper alloy solder.

7. The saw blade or the cut-off wheel according to claim 1 , wherein a solder layer comprises a copper-tin alloy solder.

8. The saw blade or the cut-off wheel according to claim 1 , wherein the base body comprises a first main surface, a second main surface and a rim connecting the first main surface and the second main surface, and wherein the granulated carbide coating covers the entire rim.

9. The saw blade or the cut-off wheel according to claim 8 , wherein the granulated carbide coating further covers portions of the first and second main surfaces.

10. The saw blade or the cut-off wheel according to claim 9 , wherein the granulated carbide coating covers a first distance of the first main surface from the rim to a center of the first main surface and a second distance of the second main surface from the rim to a center of the second main surface, and wherein the first distance and the second distance are the same.

11. A method for producing a circular saw blade or a cut-off wheel, the method comprising:
providing a base body made of stainless steel and/or steel, the base body having a cutting area;
applying a solder paste to the cutting area;
applying a granulated carbide coating on the solder paste; and
soldering the granulated carbide coating to the base body and hardening the base body in one single process comprising heating and subsequent cooling,
wherein hardening comprises transforming the stainless steel to martensitic stainless steel and/or the steel to martensitic steel.

12. The method according to claim 11 , wherein, the solder paste is a copper alloy or a copper-tin alloy.

13. The method according to claim 11 , wherein, heating occurs in a vacuum furnace or in a continuous shielding gas furnace.

14. The method according to claim 11 , wherein, after soldering and cooling, the base body has a hardness of approximately 450 HV.

15. The method according to claim 11 , wherein producing the base body comprises a deep drawing process.

16. The method according to claim 11 , wherein heating comprises applying a temperature in a range of 950° C. to 1150° C.

17. The method according to claim 11 , wherein heating comprises applying a temperature of approximately or greater than 1100° C.

18. The method according to claim 11 , wherein applying the granulated carbide coating to the cutting area comprises sprinkling the granulated carbide on the cutting area.

19. A method for producing a circular saw blade or a cut-off wheel, the method comprising:
producing a base body made of stainless steel and/or steel, the base body having a cutting area;
applying a copper alloy or copper-tin alloy solder paste to the cutting area;
applying a granulated carbide coating on the solder paste; and
soldering the granulated carbide coating to the base body and hardening the base body in one single process comprising heating at a temperature in a range of 950° C. to 1150° C. and subsequent cooling,
wherein hardening comprises transforming the stainless steel to martensitic stainless steel and/or the steel to martensitic steel.

Assignees

• Fein C & E Gmbh

Inventors

• Mann Rainer

Classifications

• B23D65/00

  Making tools for sawing machines or sawing devices for use in cutting any kind of material · CPC title

• B23D61/02

  Circular saw blades · CPC title

• B24B23/04

  with oscillating grinding tools; Accessories therefor · CPC title

• B24D3/06

  metallic {or mixture of metals with ceramic materials, e.g. hard metals, "cermets", cements} · CPC title

• B23D61/028 Primary

  of special material · CPC title