Cobalt Based Alloys

1
Cobalt Based Alloys
2
Resistance Welding

• Learning Activities
• View Slides
• Read Notes,
• Listen to lecture
• Do on-line workbook

• Lesson Objectives
• When you finish this lesson you will understand

Keywords
3
Fe (9.7)
AWS Welding Handbook
4
AWS Welding Handbook
5
Sullivan, CP, Et. Al. Covalt-Base Superalloys
1970Centre DInformation Du Cobalt, Brussels,
1970
6
Sullivan, CP, Et. Al. Covalt-Base Superalloys
1970Centre DInformation Du Cobalt, Brussels,
1970
7
Sullivan, CP, Et. Al. Covalt-Base Superalloys
1970Centre DInformation Du Cobalt, Brussels,
1970
8
M23C6 M6C Eutectic
MC
Example Cast MAR-M 302
Sullivan, CP, Et. Al. Covalt-Base Superalloys
1970Centre DInformation Du Cobalt, Brussels,
1970
9

• Applications
• First Stage Turbine Blades Lower Temp
• Sheet applications such as exhaust case Burner
  liners
• Medical Implants

10
Resistance Welding
The resistance welding manual says Cobalt alloys
can be spot, seam and flash welding with
conditions similar to that of Nickel. But they
also say data is limited. RWMA
concludes current requirements will be no more
than for SS, but slightly higher welding forces
will be required. Welding time should also be
about the same.
11
Some Applications
12
Manufacture of a Non-Migrating Vascular Prosthesis
Mesh Anchor Hooks Resistance Welded Zig-Zag
Wire Spring
Placement in Artery
Blood Vessel Liner and Spring Made From MP35N
Wire Compressed Inserted In Artery
McNamara, E, Weiser, M, Non-migrating
Vascular Prosthesis and minimally invasive
Placement System Therefore, US Patent 6,004,347
Dec 21, 1999