https://padlet.com/wan_fahmin/8pnn9ur8uyhe Attendance for 8-12 April 2018 en-us 2018-04-10 07:21:52 UTC 2018-04-23 05:28:43 UTC hello@padlet.com wan_fahmin https://padlet.com/wan_fahmin/8pnn9ur8uyhe/wish/250150846 2018-04-10 08:00:41 UTC https://padlet.com/wan_fahmin/8pnn9ur8uyhe/wish/250150846 https://padlet.com/wan_fahmin/8pnn9ur8uyhe/wish/250553507 heat treatment of steel:
1) annealing - relieve internal stresses, increase ductility and toughness. (Subcritical)-remove effects of cold work by recrytalizzation of ferite. (Spherodizing)-improve ductility of material.
 
2)normalizing - heating, soaking, air-cooled

3)quenching [MARTENSITE] - brine quench(fastest cooling rate) , water quench(cheap and fast), oil quench(flammable), air cool(relatively slow). 

]]> 2018-04-11 03:46:06 UTC https://padlet.com/wan_fahmin/8pnn9ur8uyhe/wish/250553507 https://padlet.com/wan_fahmin/8pnn9ur8uyhe/wish/250553816 Heat treatment of steel
1) annealing - the time at the high temp is long enough to allow the desired transformation to accur
2) normalizing
3)quenching
4)tempering]]> 2018-04-11 03:49:02 UTC https://padlet.com/wan_fahmin/8pnn9ur8uyhe/wish/250553816 https://padlet.com/wan_fahmin/8pnn9ur8uyhe/wish/250554551 heat treatment of steel
1)annealing
2)normalizing
3)quenching
4)tempering]]> 2018-04-11 03:55:40 UTC https://padlet.com/wan_fahmin/8pnn9ur8uyhe/wish/250554551 https://padlet.com/wan_fahmin/8pnn9ur8uyhe/wish/250554758 Heat treatment of steel - annealing , normalizing , quenching , tempering

Annealing - relieve internal stress
1 heating 2 hypoeutectoid 3 soaking 4 furnace cooled

Normalizing 
1 Heating 2 Soaking 3 Air cooled

Quenching
1 Heating

]]> 2018-04-11 03:57:08 UTC https://padlet.com/wan_fahmin/8pnn9ur8uyhe/wish/250554758 https://padlet.com/wan_fahmin/8pnn9ur8uyhe/wish/250610665 Heat treatment of steel(annnealling,normalizing,quenching,tempering)

Annealling
1. Heating
2.soaking
3. Furnace cooled

Normalizing 
1.heating
2.soaking
3.air cooled

Quenching
-medium( brine quench, water quench, oil quench, air cool)
-brine quench is fastest cooling rates but it can make steel corrosive


]]> 2018-04-11 08:55:37 UTC https://padlet.com/wan_fahmin/8pnn9ur8uyhe/wish/250610665 https://padlet.com/wan_fahmin/8pnn9ur8uyhe/wish/250779615 Heat treatment of steel 
1 annealing
2 normalizing
3 quenching
4 tempering]]> 2018-04-11 15:42:58 UTC https://padlet.com/wan_fahmin/8pnn9ur8uyhe/wish/250779615 https://padlet.com/wan_fahmin/8pnn9ur8uyhe/wish/250827989 Heat treatment of steel
1 annealing
2 normalizing
     heating-soaking-aircooled
3 quenching
4 tempering

]]> 2018-04-11 17:10:51 UTC https://padlet.com/wan_fahmin/8pnn9ur8uyhe/wish/250827989 https://padlet.com/wan_fahmin/8pnn9ur8uyhe/wish/251747971 Heat treatment of steel
1) annealing - the time at the high temp is long enough to allow the desired transformation to accur
2) normalizing
1 Heating 2 Soaking 3 Air cooled
3)quenching
medium( brine quench, water quench, oil quench, air cool)
-brine quench is fastest cooling rates but it can make steel corrosive
4)tempering]]> 2018-04-14 00:07:54 UTC https://padlet.com/wan_fahmin/8pnn9ur8uyhe/wish/251747971 https://padlet.com/wan_fahmin/8pnn9ur8uyhe/wish/251753346 Heat treatment of steel:
1. annealing
2. normalizing
3. quenching
4. tempering]]> 2018-04-14 02:03:00 UTC https://padlet.com/wan_fahmin/8pnn9ur8uyhe/wish/251753346 https://padlet.com/wan_fahmin/8pnn9ur8uyhe/wish/251855140 Heat treatment of steel:
1. Annealing - heating, soaking and furnace cooled
2. Normalizing - heating, soaking and air cooled.
3. Quenching - brine quench (fastest cooling rate), water quench ( fast and cheap), oil quench (flammable) and air cool (slow).
4. Tempering]]> 2018-04-15 07:54:04 UTC https://padlet.com/wan_fahmin/8pnn9ur8uyhe/wish/251855140 https://padlet.com/wan_fahmin/8pnn9ur8uyhe/wish/252846187 Heat treatment of steel
1 annealing 
2 normalizing 
3 quenching
4 tempering]]> 2018-04-18 04:26:11 UTC https://padlet.com/wan_fahmin/8pnn9ur8uyhe/wish/252846187 https://padlet.com/wan_fahmin/8pnn9ur8uyhe/wish/252850416 Chp 6 Heat treatment of steel
-quenching 
-annealing
-normalizing 
-tempering]]> 2018-04-18 04:57:44 UTC https://padlet.com/wan_fahmin/8pnn9ur8uyhe/wish/252850416 https://padlet.com/wan_fahmin/8pnn9ur8uyhe/wish/252883565 Heat treatment of steel which is quenching, annealing, normalizing and tempering]]> 2018-04-18 07:57:22 UTC https://padlet.com/wan_fahmin/8pnn9ur8uyhe/wish/252883565 https://padlet.com/wan_fahmin/8pnn9ur8uyhe/wish/252984593 Chapter 6 
Heat treatment of steel
1) quenching 
2) annealing
3) normalizing 
4) tempering]]> 2018-04-18 13:32:39 UTC https://padlet.com/wan_fahmin/8pnn9ur8uyhe/wish/252984593 lyhheng https://padlet.com/wan_fahmin/8pnn9ur8uyhe/wish/253337234 Heat Treatment of steel
1) Annealing
-heat to an elevated temp. and maintain it for some time , then cooled.
2) Normalising
-Heat , soak and then air cooled.
3) Quenching
-using brine, water, oil or air cooled
-cooling rate : water>oil>air
4) Tempering
-heat , soak and air cooled (martensite to Tempered martensite)
-austempering, produces bainite]]> 2018-04-19 09:35:30 UTC https://padlet.com/wan_fahmin/8pnn9ur8uyhe/wish/253337234 https://padlet.com/wan_fahmin/8pnn9ur8uyhe/wish/254128936 Heat treatment of steel:
-Annealing
-Normalizing
-Quenching
-Tempering]]> 2018-04-22 12:10:45 UTC https://padlet.com/wan_fahmin/8pnn9ur8uyhe/wish/254128936 cky846470 https://padlet.com/wan_fahmin/8pnn9ur8uyhe/wish/254130579  Heat treatment of steel:
-Annealing
-Normalizing
-Quenching
-Tempering ]]> 2018-04-22 12:34:23 UTC https://padlet.com/wan_fahmin/8pnn9ur8uyhe/wish/254130579 kongmenghongisaac https://padlet.com/wan_fahmin/8pnn9ur8uyhe/wish/254245537 Heat treatment of steel
-annealing
-Normalizing
-quenching
-tempering]]> 2018-04-23 05:23:00 UTC https://padlet.com/wan_fahmin/8pnn9ur8uyhe/wish/254245537 https://padlet.com/wan_fahmin/8pnn9ur8uyhe/wish/254246026 Heat Treatment of Steel
~Quenching
~Annealing
~Tempering
~Normalizing]]> 2018-04-23 05:26:35 UTC https://padlet.com/wan_fahmin/8pnn9ur8uyhe/wish/254246026