slide1 n.
Download
Skip this Video
Loading SlideShow in 5 Seconds..
oee.nrcan.gc.ca PowerPoint Presentation
Download Presentation
oee.nrcan.gc.ca

Loading in 2 Seconds...

play fullscreen
1 / 9

oee.nrcan.gc.ca - PowerPoint PPT Presentation


  • 172 Views
  • Uploaded on

Powder Metallurgy (P/M) Method: Make fine metal powders and sort Mix powders to get “alloy” Iron alloys most common, also Bronze Compaction Powder is pressed into a “green compact” 20,000-100,000psi pressure Still very porous, ~70% density May be done cold or warm (higher density)

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about 'oee.nrcan.gc.ca' - zonta


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
slide1

Powder Metallurgy (P/M)

  • Method:
  • Make fine metal powders and sort
  • Mix powders to get “alloy”
    • Iron alloys most common, also Bronze
  • Compaction
    • Powder is pressed into a “green compact”
    • 20,000-100,000psi pressure
    • Still very porous, ~70% density
    • May be done cold or warm (higher density)
  • Sintering
    • Controlled atmosphere: no oxygen
    • Heat to .75*Tmelt
    • Particles bind together
    • Part shrinks in size
    • Density increases, up to 95%
    • Strength ~=~ Density
  • P/M (vs. Casting):
  • Mass produce small steel parts, net-shape
  • Less waste
  • Unusual “alloys”
  • Range of densities, porosity (adv or disadv)
  • Less energy use
  • But: Smaller parts and less complexity (2.5D)

P/M net-shape gears are common, save machining time

oee.nrcan.gc.ca

slide2

Powder Metallurgy

Slightly porous appearance is common

Range of particle sizes

www.buau.com.au

www.parmaco.com

slide3

Cermet cutting inserts for lathe

Powder Metallurgy:

Cermet cutting tools

(Ceramic-Metal composite)

www.kyocera-yashica.com.br

Cermet-tipped saw blade for long life

Microstructure: ceramic particles in metal matrix

www.moldmakingtechnology.com

www.toolbarn.com

slide4

Metal filters

Powder Metallurgy:

Porous Metals

Oil-impregnated Porous Bronze Bearings

nic.sav.sk

www.ondrives.com

www.hd-bearing.com

slide5

Powder Metallurgy: Connecting Rods

www.dps-performance.com

Forged on left; P/M on right

slide6

Powdered Metal Transmission Gear

www.chipm.com

  • Warm compaction method with 1650-ton press
  • Teeth are molded net shape: No machining
  • UTS = 155,000 psi
  • 30% cost savings over the original forged part
slide9

References

DeGarmo: E.P. DeGarmo et al, Materials and Processes in Manufacturing, Wiley, 2003.