POWDER METALLURGY Prof. J Viplava Kumar MME,MGIT.
-
Upload
gilbert-maxwell -
Category
Documents
-
view
227 -
download
1
Transcript of POWDER METALLURGY Prof. J Viplava Kumar MME,MGIT.
![Page 1: POWDER METALLURGY Prof. J Viplava Kumar MME,MGIT.](https://reader036.fdocuments.us/reader036/viewer/2022062300/56649d045503460f949d75fd/html5/thumbnails/1.jpg)
POWDER METALLURGY
Prof. J Viplava Kumar MME,MGIT
![Page 2: POWDER METALLURGY Prof. J Viplava Kumar MME,MGIT.](https://reader036.fdocuments.us/reader036/viewer/2022062300/56649d045503460f949d75fd/html5/thumbnails/2.jpg)
Manufacturing Techniques
Conventional route
Foundry/ Casting
Powder Metallurgy
![Page 3: POWDER METALLURGY Prof. J Viplava Kumar MME,MGIT.](https://reader036.fdocuments.us/reader036/viewer/2022062300/56649d045503460f949d75fd/html5/thumbnails/3.jpg)
Outline Introduction Production of Powders Consolidation Applications
![Page 4: POWDER METALLURGY Prof. J Viplava Kumar MME,MGIT.](https://reader036.fdocuments.us/reader036/viewer/2022062300/56649d045503460f949d75fd/html5/thumbnails/4.jpg)
Advantages Economical mass production technology Scrapfree technology Unique technique: Porous Components, Cermets, Refractory Metals, Cemented carbides
Limitations Limitations on shape and size of products Health hazards Fine powders of reactive metals - pyrophoric
![Page 5: POWDER METALLURGY Prof. J Viplava Kumar MME,MGIT.](https://reader036.fdocuments.us/reader036/viewer/2022062300/56649d045503460f949d75fd/html5/thumbnails/5.jpg)
Applications
![Page 6: POWDER METALLURGY Prof. J Viplava Kumar MME,MGIT.](https://reader036.fdocuments.us/reader036/viewer/2022062300/56649d045503460f949d75fd/html5/thumbnails/6.jpg)
• Tungsten filaments:
![Page 7: POWDER METALLURGY Prof. J Viplava Kumar MME,MGIT.](https://reader036.fdocuments.us/reader036/viewer/2022062300/56649d045503460f949d75fd/html5/thumbnails/7.jpg)
Production of Powders
Atomization Example: Powders of Superalloys, HSS, Cu-Al
![Page 8: POWDER METALLURGY Prof. J Viplava Kumar MME,MGIT.](https://reader036.fdocuments.us/reader036/viewer/2022062300/56649d045503460f949d75fd/html5/thumbnails/8.jpg)
ii) Reduction of oxides Fe powder at Hoganas
iii) Chemical reduction: Carbonyl Ni and Fe
iv) Chemical + Mechanical methods: Stainless steel, Ti, Zr (NFC-ECIL)
![Page 9: POWDER METALLURGY Prof. J Viplava Kumar MME,MGIT.](https://reader036.fdocuments.us/reader036/viewer/2022062300/56649d045503460f949d75fd/html5/thumbnails/9.jpg)
Consolidation Techniques
i. Compactionii. Sintering
Compaction: Shaping, deformation and densification of a powder
by application of Pressure
![Page 10: POWDER METALLURGY Prof. J Viplava Kumar MME,MGIT.](https://reader036.fdocuments.us/reader036/viewer/2022062300/56649d045503460f949d75fd/html5/thumbnails/10.jpg)
Die Compaction:
Schematic of the die compaction process
Compaction
Die- compaction
Isostatic compaction
![Page 11: POWDER METALLURGY Prof. J Viplava Kumar MME,MGIT.](https://reader036.fdocuments.us/reader036/viewer/2022062300/56649d045503460f949d75fd/html5/thumbnails/11.jpg)
Isostatic Compaction
Applying stress uniformly in all directions
Isostatic Compaction
Cold Isostatic Compaction
Hot Isostatic Compaction
![Page 12: POWDER METALLURGY Prof. J Viplava Kumar MME,MGIT.](https://reader036.fdocuments.us/reader036/viewer/2022062300/56649d045503460f949d75fd/html5/thumbnails/12.jpg)
Schematics of Isostatic Pressing
![Page 13: POWDER METALLURGY Prof. J Viplava Kumar MME,MGIT.](https://reader036.fdocuments.us/reader036/viewer/2022062300/56649d045503460f949d75fd/html5/thumbnails/13.jpg)
Cold Isostatic Compaction:
![Page 14: POWDER METALLURGY Prof. J Viplava Kumar MME,MGIT.](https://reader036.fdocuments.us/reader036/viewer/2022062300/56649d045503460f949d75fd/html5/thumbnails/14.jpg)
Hot Isostatic Pressing:
![Page 15: POWDER METALLURGY Prof. J Viplava Kumar MME,MGIT.](https://reader036.fdocuments.us/reader036/viewer/2022062300/56649d045503460f949d75fd/html5/thumbnails/15.jpg)
Sintering: Thermal process which increases the strength of a
powder mass by bonding adjacent particles via diffusion
Steps of Sintering
![Page 16: POWDER METALLURGY Prof. J Viplava Kumar MME,MGIT.](https://reader036.fdocuments.us/reader036/viewer/2022062300/56649d045503460f949d75fd/html5/thumbnails/16.jpg)
Liquid phase sintering:
WC- Co system
![Page 17: POWDER METALLURGY Prof. J Viplava Kumar MME,MGIT.](https://reader036.fdocuments.us/reader036/viewer/2022062300/56649d045503460f949d75fd/html5/thumbnails/17.jpg)
![Page 18: POWDER METALLURGY Prof. J Viplava Kumar MME,MGIT.](https://reader036.fdocuments.us/reader036/viewer/2022062300/56649d045503460f949d75fd/html5/thumbnails/18.jpg)
Thank You