Hardness means resistance to localised plastic deformation. Every material has an inherent tendency to oppose any change which it may encounter. So, when a material experiences plastic deformation causing force, it encounters it. This tendency of material to resist plastic deformation is called hardRead more
Hardness means resistance to localised plastic deformation.
Every material has an inherent tendency to oppose any change which it may encounter. So, when a material experiences plastic deformation causing force, it encounters it. This tendency of material to resist plastic deformation is called hardness. Hardness is usually of two types: Scratch Hardness and Indentation hardness. Scratch hardness is resistance to friction from sharp object and Indentation hardness is resistance to constant compression forces.
2P+5/2 O2 = P2O5 In this process if you add lime it will fix or it will combine with P2O5. Like CaO.P2O5. so, the reversal of Phosphorus doesn't take place. because of this CaO decreases the P2O5 activity. so, forward reaction is favorable. that means we can remove Phosphorus continuously.
2P+5/2 O2 = P2O5
In this process if you add lime it will fix or it will combine with P2O5. Like CaO.P2O5. so, the reversal of Phosphorus doesn’t take place. because of this CaO decreases the P2O5 activity. so, forward reaction is favorable. that means we can remove Phosphorus continuously.
The cost of the pellets making process is very expensive compare to sinter making process. That's why we are using little pellets to improve burden quality.
The cost of the pellets making process is very expensive compare to sinter making process. That’s why we are using little pellets to improve burden quality.
One of the most important reasons of using Hematite in blast furnace is that it is very easy to fuse at very lower temperature , as here iron is not strongly bonded with oxygen & as a result we can easily break the bond between iron and oxygen (Fe2O3) and extract metallic iron economically.Read more
One of the most important reasons of using Hematite in blast furnace is that it is very easy to fuse at very lower temperature , as here iron is not strongly bonded with oxygen & as a result we can easily break the bond between iron and oxygen (Fe2O3) and extract metallic iron economically. &
another reason depends on its availability in nature, i.e. it is easily available.
Thank you
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C Patel Metallurgy PlatinumGATE Metallurgy Coaching |Providing Video Solutions and Concepts of Metallurgy since 2016 | Follow our channel, \"C Patel Metallurgy\" on Youtube for your GATE preparation
C Patel Metallurgy PlatinumGATE Metallurgy Coaching |Providing Video Solutions and Concepts of Metallurgy since 2016 | Follow our channel, \"C Patel Metallurgy\" on Youtube for your GATE preparation
Steel: We make by decreasing carbon content in Pig iron from 4-5 wt% to less than 2 wt% Iron: Pure iron making is difficult but we can make it with purification techniques like VOD, then removing Mn, Si, etc from steel.
Steel: We make by decreasing carbon content in Pig iron from 4-5 wt% to less than 2 wt%
Iron: Pure iron making is difficult but we can make it with purification techniques like VOD, then removing Mn, Si, etc from steel.
C Patel Metallurgy PlatinumGATE Metallurgy Coaching |Providing Video Solutions and Concepts of Metallurgy since 2016 | Follow our channel, \"C Patel Metallurgy\" on Youtube for your GATE preparation
C Patel Metallurgy PlatinumGATE Metallurgy Coaching |Providing Video Solutions and Concepts of Metallurgy since 2016 | Follow our channel, \"C Patel Metallurgy\" on Youtube for your GATE preparation
Above nose: Critical energy required for diffusion is low because of less undercooling. as the undercooling increases the energy availability becomes high Below Nose: Temperature is not high enough to help in physical diffusion of atoms and hence transformation takes time.
Above nose:
Critical energy required for diffusion is low because of less undercooling. as the undercooling increases the energy availability becomes high
Below Nose:
Temperature is not high enough to help in physical diffusion of atoms and hence transformation takes time.
C Patel Metallurgy PlatinumGATE Metallurgy Coaching |Providing Video Solutions and Concepts of Metallurgy since 2016 | Follow our channel, \"C Patel Metallurgy\" on Youtube for your GATE preparation
First case: A1V1 = A2V2 +A3V3 ( Flow rate shall be same) A1*2 = A2( V2+V3) as A2 and A3 are same A1*2= A2(3+5) A1=4A2 Now, second case A1V1 =A2(V2 +V3) A1*3 = A2(4+V3) 4A2*3 =A2(4+V3) 12 = 4 + V3 so, V3 = 8 m/s
C Patel Metallurgy PlatinumGATE Metallurgy Coaching |Providing Video Solutions and Concepts of Metallurgy since 2016 | Follow our channel, \"C Patel Metallurgy\" on Youtube for your GATE preparation
If we temper for very long time: Martensite will first transform into alpha and cementite and this cementite will start coarsening and we will get coarsened cementite with ferrite.
If we temper for very long time:
Martensite will first transform into alpha and cementite and this cementite will start coarsening and we will get coarsened cementite with ferrite.
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What is hardness of material?
Hardness means resistance to localised plastic deformation. Every material has an inherent tendency to oppose any change which it may encounter. So, when a material experiences plastic deformation causing force, it encounters it. This tendency of material to resist plastic deformation is called hardRead more
Hardness means resistance to localised plastic deformation.
Every material has an inherent tendency to oppose any change which it may encounter. So, when a material experiences plastic deformation causing force, it encounters it. This tendency of material to resist plastic deformation is called hardness. Hardness is usually of two types: Scratch Hardness and Indentation hardness. Scratch hardness is resistance to friction from sharp object and Indentation hardness is resistance to constant compression forces.
See lessHow to decrease Phosphorous activity in slag?
2P+5/2 O2 = P2O5 In this process if you add lime it will fix or it will combine with P2O5. Like CaO.P2O5. so, the reversal of Phosphorus doesn't take place. because of this CaO decreases the P2O5 activity. so, forward reaction is favorable. that means we can remove Phosphorus continuously.
2P+5/2 O2 = P2O5
See lessIn this process if you add lime it will fix or it will combine with P2O5. Like CaO.P2O5. so, the reversal of Phosphorus doesn’t take place. because of this CaO decreases the P2O5 activity. so, forward reaction is favorable. that means we can remove Phosphorus continuously.
why sinter is used upto 50%, but pellet 15-20% in blast furnace burden even though pellets have good permeability?
The cost of the pellets making process is very expensive compare to sinter making process. That's why we are using little pellets to improve burden quality.
The cost of the pellets making process is very expensive compare to sinter making process. That’s why we are using little pellets to improve burden quality.
See lessWhy hematite is used in blast furnace?
One of the most important reasons of using Hematite in blast furnace is that it is very easy to fuse at very lower temperature , as here iron is not strongly bonded with oxygen & as a result we can easily break the bond between iron and oxygen (Fe2O3) and extract metallic iron economically.Read more
One of the most important reasons of using Hematite in blast furnace is that it is very easy to fuse at very lower temperature , as here iron is not strongly bonded with oxygen & as a result we can easily break the bond between iron and oxygen (Fe2O3) and extract metallic iron economically. &
See lessanother reason depends on its availability in nature, i.e. it is easily available.
Thank you
What is Slip System?
Slip system consist of slip plane and slip direction Slip System=Slip Plane+Slip Direction Crystal Structure No. of slip system HCP 3 FCC 12 BCC 48
Slip system consist of slip plane and slip direction
See lessSlip System=Slip Plane+Slip Direction
Crystal Structure No. of slip system
HCP 3
FCC 12
BCC 48
Why the diffusion coefficient equation is exponential?
Because it is dependent on temperature and it involves activation energy. This is derived from Arrhenius Equation.
Because it is dependent on temperature and it involves activation energy. This is derived from Arrhenius Equation.
See lessWhat is the difference in forging and casting sample?
Forging sample has fine and broken grains of same size Casting sample has fine, columnar and equiaxed grains.
Forging sample has fine and broken grains of same size
Casting sample has fine, columnar and equiaxed grains.
See lesshow to make iron and steel?
Steel: We make by decreasing carbon content in Pig iron from 4-5 wt% to less than 2 wt% Iron: Pure iron making is difficult but we can make it with purification techniques like VOD, then removing Mn, Si, etc from steel.
Steel: We make by decreasing carbon content in Pig iron from 4-5 wt% to less than 2 wt%
Iron: Pure iron making is difficult but we can make it with purification techniques like VOD, then removing Mn, Si, etc from steel.
See lessHow to control inclusion in steel?
Proper stirring using Ar purging Using synthetic slags Avoid oxidation of impurities Control of impurities in steel
- Proper stirring using Ar purging
- Using synthetic slags
- Avoid oxidation of impurities
- Control of impurities in steel
See lessWhy in TTT below and above the nose higher time need to start transition?
Above nose: Critical energy required for diffusion is low because of less undercooling. as the undercooling increases the energy availability becomes high Below Nose: Temperature is not high enough to help in physical diffusion of atoms and hence transformation takes time.
Above nose:
Critical energy required for diffusion is low because of less undercooling. as the undercooling increases the energy availability becomes high
Below Nose:
Temperature is not high enough to help in physical diffusion of atoms and hence transformation takes time.
See lessWater enters a pipe at cross-sectional area A1 that branches out into a sections at equal area A2 & A3 at one instant How velocity are v1=2m/s,v2=3m/s &v3=5m/s at another instant v1=3m/s,v2=4m/s. find v3.
First case: A1V1 = A2V2 +A3V3 ( Flow rate shall be same) A1*2 = A2( V2+V3) as A2 and A3 are same A1*2= A2(3+5) A1=4A2 Now, second case A1V1 =A2(V2 +V3) A1*3 = A2(4+V3) 4A2*3 =A2(4+V3) 12 = 4 + V3 so, V3 = 8 m/s
First case:
A1V1 = A2V2 +A3V3 ( Flow rate shall be same)
A1*2 = A2( V2+V3) as A2 and A3 are same
A1*2= A2(3+5)
A1=4A2
Now, second case
A1V1 =A2(V2 +V3)
A1*3 = A2(4+V3)
4A2*3 =A2(4+V3)
12 = 4 + V3
so, V3 = 8 m/s
See lessWhat happened when martensite and bainite are tempered for long time below A1 and cooled in air? What will be microstructure?
If we temper for very long time: Martensite will first transform into alpha and cementite and this cementite will start coarsening and we will get coarsened cementite with ferrite.
If we temper for very long time:
Martensite will first transform into alpha and cementite and this cementite will start coarsening and we will get coarsened cementite with ferrite.
See less