Method of joining two materials by diffusion welding

Patent metadata

Field	Value
Publication number	US-9555500-B2
Application number	US-201414783448-A
Country	US
Kind code	B2
Filing date	Apr 7, 2014
Priority date	Apr 10, 2013
Publication date	Jan 31, 2017
Grant date	Jan 31, 2017

Abstract

A method to join a first material and a second material by diffusion welding, wherein a third material is put in between the first material and the second material during the joining process.

First claim

The invention claimed is:

1. A method to join a first material and a second material by diffusion welding,
wherein a third material is put in between the first material and the second material during the joining process,
wherein the first material is a tool steel or a bearing steel, the second material is a cast iron or a cast steel and the third material is low-carbon steel,
wherein the first material and the second material present a carbon potential at the temperature of joining.

2. The method according to claim 1 , wherein the third material has a carbon content of less than 0.3%.

3. The method according to claim 1 , wherein the third material is a ferritic steel.

4. The method according to claim 1 , wherein the third material is a sheet metal.

5. The method according to claim 1 , wherein the thickness of the third material is 0.5-10 mm.

6. The method according to claim 1 , wherein the first material is one of:
M50,
M50 NIL,
XD15NW,
Bearing steel as shown in ISO 683-17:1999(E) pages 9-10,
Stainless tool steel,
Stainless steel suitable for martensitic hardening,
N-alloyed stainless steel, suitable for martensitic hardening, or
Stainless steel suitable for surface enrichment and martensitic hardening.

7. The method according to claim 1 wherein the second material is the cast iron.

8. The method according to claim 7 , wherein the second material has a carbon content of at least 2 wt %.

9. The method according to claim 1 , wherein the second material is the cast steel.

10. The method according to claim 9 , wherein the second material is has a carbon content of 0.5 wt % or less.

11. The method according to claim 1 , wherein the method is accomplished by hot isostatic pressing.

12. The method according to claim 1 , wherein at least one of the first material and the second material is in powder form before heating.

13. The method according to claim 1 , wherein the method is used to form a mechanical component.

14. The method according to claim 1 , wherein the method is used to form a bearing component, wherein the bearing component is one of:
an inner ring of a bearing, or
an outer ring of the bearing, or
a roller of a roller bearing.

15. A method to join a first material and a second material by diffusion welding comprising:
placing a third material between the first material and the second material; and
joining the first material to the second material by diffusion welding,
wherein the first material and the second material present a carbon potential at the temperature of joining, and
wherein the first material is a tool steel or a bearing steel, the second material is a cast iron or cast steel and the third material is a low-carbon steel.

16. The method according to claim 15 , wherein the third material has a carbon content of less than 0.3%.

17. The method according to claim 16 , wherein the third material is a ferritic steel.

18. The method according to claim 15 , wherein the third material is a ferritic steel.

19. The method according to claim 15 , wherein the second material is the cast iron and has a carbon content of at least 2 wt %.

20. The method according to claim 15 , wherein the second material is the cast steel and has a carbon content of 0.5 wt % or less.

Assignees

• Strandell Ingemar
• Skf Ab

Inventors

• Strandell Ingemar

Classifications

• F16C33/64

  Special methods of manufacture · CPC title

• B23K20/021 Primary

  Isostatic pressure welding · CPC title

• B23K20/02

  by means of a press {; Diffusion bonding} · CPC title

• F16C2204/72

  with nickel as further constituent, e.g. stainless steel · CPC title

• F16C2226/36

  by welding · CPC title