How many types of case hardening and what are they ?

How many types of case hardening and what are they ?
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Answer :

The case hardening method can be divided into the following sections. Namely: 1. Carburizing ( a) Pack Carburizing ( b) Gas Carburizing ( c ) Liquid Carburizing Cyaniding 3 . Nitriding 4 . Induction Hardening 5. Flame Hardening .
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Related questions

What is case hardening and why is case hardening done ?

Description : What is case hardening and why is case hardening done ?

Last Answer : The method used to harden the outer surface of steel is called case hardening . Case hardening is done for the following purposes: Increase the resistance to corrosion. 2. To create a shiny ... . . Creating resistance to chemical reactions. . To increase the durability of the product or product.

__________ is not a case hardening process.(A) Carburising (B) Nitriding (C) Cyaniding (D) Annealing

Description : __________ is not a case hardening process. (A) Carburising (B) Nitriding (C) Cyaniding (D) Annealing

Last Answer : (D) Annealing

Nitriding of steel is a process for (A) Case hardening (B) Spheroidising (C) Normalising (D) Annealing

Description : Nitriding of steel is a process for (A) Case hardening (B) Spheroidising (C) Normalising (D) Annealing

Last Answer : (A) Case hardening

Occurrence of 'case hardening' during drying of a high moisture solid cake __________ the drying rate. (A) Increases (B) Decreases (C) Does not affect

Description : Occurrence of 'case hardening' during drying of a high moisture solid cake __________ the drying rate. (A) Increases (B) Decreases (C) Does not affect

Last Answer : (B) Decreases

A solid material shows case hardening properties while drying. Which of the following should be controlled to control the drying process? (A) Flow rate of inlet air (B) Relative humidity of outlet air (C) Humidity of inlet air (D) Temperature of the solid

Description : A solid material shows case hardening properties while drying. Which of the following should be controlled to control the drying process? (A) Flow rate of inlet air (B) Relative humidity of outlet air (C) Humidity of inlet air (D) Temperature of the solid

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With high frequency electric current hardening is achieved and is called as a) case hardening b) induction hardeningc) surface hardening d) metal hardening

Description : With high frequency electric current hardening is achieved and is called as a) case hardening b) induction hardeningc) surface hardening d) metal hardening

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Case hardening of a material is (A) Followed by tempering or carburising (B) Preceded by its tempering (C) Done to get a soft ductile interior with a very hard surface (D) Carried out to get extreme hardness in its core

Description : Case hardening of a material is (A) Followed by tempering or carburising (B) Preceded by its tempering (C) Done to get a soft ductile interior with a very hard surface (D) Carried out to get extreme hardness in its core

Last Answer : (D) Carried out to get extreme hardness in its core

Case hardening is not done by (A) Nitriding (B) Hot dipping (C) Electroplating (D) Both ‘b’ & ‘c’

Description : Case hardening is not done by (A) Nitriding (B) Hot dipping (C) Electroplating (D) Both ‘b’ & ‘c’

Last Answer : Option D

Pick up the correct statement from the following: (A) Catalysts are added to assist and accelerate the hardening of resin (B) The fillers are inert materials and they impart strength and hardness (C) Fibrous fillers increase thermal resistance (D) All the above

Description : Pick up the correct statement from the following: (A) Catalysts are added to assist and accelerate the hardening of resin (B) The fillers are inert materials and they impart strength and hardness (C) Fibrous fillers increase thermal resistance (D) All the above

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Why does my stomach keep hardening and getting tight?

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How can one prove their skin and surrounding tissue is hardening?

Description : How can one prove their skin and surrounding tissue is hardening?

Last Answer : “place thee lotion on thee skin”

Should we rally to put the world to work hardening our electronics for the next great solar Coronal Mass Ejection?

Description : Should we rally to put the world to work hardening our electronics for the next great solar Coronal Mass Ejection?

Last Answer : answer:With this all I could find on preparations: Dr Fisher said precautions could be taken including creating back up systems for hospitals and power grids and allow development on satellite ... a complete outage of electricity supplies we had better prepare for life without power. Source

I just got a message from my Dad, his doctor told him that he has to have surgery because he has hardening of the arteries in his legs. Medical jellies, what can you tell me about this?

Description : I just got a message from my Dad, his doctor told him that he has to have surgery because he has hardening of the arteries in his legs. Medical jellies, what can you tell me about this?

Last Answer : answer:Heard about this I think, so here are some claims I cannot back up with references. Something to do with cholesterol, bad bloodflow causes the arteries to petrify and become insanely dangerous, things need ... leg arteries. If so that would be where I know it from. Wiki confirms most of this.

what are Surface Hardening?

Description : what are Surface Hardening?

Last Answer : The combination of a hard surface and a soft interior is greatly valued in modern metal engineering because it offers very high stress and fatigue for applications such as gears and anti-friction ... . Surface-hardened steel is also valued for its low cost and superior flexibility in manufacturing.

What is the temperature of hardening of mercury ?

Description : What is the temperature of hardening of mercury ?

Last Answer : Mercury hardening temperature = - 39 ° C = (273-39) K = 234 ° K

Quick hardening of iron, how to quickly pack iron

Description : I need to cover the stick to make it last. Is it homemade? Maybe leave her on fire or something? Or is it left in a specialized company?

Last Answer : It can also be at home, but you have to have a furnace or at least an autogenous to heat the stick and immerse it in water or oil.

Hardening of the arteries due to deposition of cholesterol on arterial wall is termed as:

Description : Hardening of the arteries due to deposition of cholesterol on arterial wall is termed as:

Last Answer : Hardening of the arteries due to deposition of cholesterol on arterial wall is termed as: A. Ataherosclerosis B. Thrombosis C. Stenosis D. Rhinitis

Is liquid tree resin hardening into amber physical or chemical change?

Description : Is liquid tree resin hardening into amber physical or chemical change?

Last Answer : Physical... chemically, it's still the same substance,

Is liquid tree resin hardening into amber physical or chemical change?

Description : Is liquid tree resin hardening into amber physical or chemical change?

Last Answer : Physical... chemically, it's still the same substance,

What is the medical term hardening of the vein?

Description : What is the medical term hardening of the vein?

Last Answer : Phlebosclerosis is hardening of a vein.

Hardening of the arteries?

Description : Hardening of the arteries?

Last Answer : DefinitionHardening of the arteries, also called atherosclerosis, is a common disorder. It occurs when fat, cholesterol, and other substances build up in the walls of arteries and form hard structures called plaques.Over ... . Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M., Inc.

Why is Low Carbon Steel Unresponsive to Work Hardening?

Description : Why is Low Carbon Steel Unresponsive to Work Hardening?

Last Answer : The most commonly used type of carbon steel is low-carbon steel. Such steels typically have less than 0.25 percent carbon content. We cannot be hardened by heat treatment (to form Martensitic) ... name implies, high-strength, low-alloy steels have higher strengths which are obtained by heat treatme

Cold worked steel parts are normally subjected to (A) Normalising (B) Hardening (C) Annealing (D) Shot peening

Description : Cold worked steel parts are normally subjected to (A) Normalising (B) Hardening (C) Annealing (D) Shot peening

Last Answer : (C) Annealing

Work hardening of a material (A) Decreases its tensile strength (B) Decreases its ductility (C) Increases its ductility (D) Does not affect its ductility

Description : Work hardening of a material (A) Decreases its tensile strength (B) Decreases its ductility (C) Increases its ductility (D) Does not affect its ductility

Last Answer : (B) Decreases its ductility

Hardening of steel is not possible unless it is heated __________ critical point. (A) Above the highest (B) Above the lowest (C) Between the first & second (D) Between the second & third

Description : Hardening of steel is not possible unless it is heated __________ critical point. (A) Above the highest (B) Above the lowest (C) Between the first & second (D) Between the second & third

Last Answer : (B) Above the lowes

Steel will respond to hardening by heat treatment processes, only when the minimum carbon content in it is __________ percent. (A) 0.02 (B) 0.2 (C) 0.35 (D) 0.5

Description : Steel will respond to hardening by heat treatment processes, only when the minimum carbon content in it is __________ percent. (A) 0.02 (B) 0.2 (C) 0.35 (D) 0.5

Last Answer : (B) 0.2

Age hardening is concerned with (A) Copper (B) Brass (C) Duralumin (D) Silver

Description : Age hardening is concerned with (A) Copper (B) Brass (C) Duralumin (D) Silver

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The increase in hardness of metal due to its cold working is termed as the __________ hardening. (A) Work (B) Age (C) Induction (D) Flame

Description : The increase in hardness of metal due to its cold working is termed as the __________ hardening. (A) Work (B) Age (C) Induction (D) Flame

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Pick out the wrong statement (A) Hardening makes the steel more brittle (B) High alloy steels contain more than 50% alloying element (C) 18/8 stainless steel is a magnetic steel (D) Both (B) and (C)

Description : Pick out the wrong statement (A) Hardening makes the steel more brittle (B) High alloy steels contain more than 50% alloying element (C) 18/8 stainless steel is a magnetic steel (D) Both (B) and (C)

Last Answer : (D) Both (B) and (C)

__________ of a material results, when its strength is increased & ductility is decreased by heating at a relatively lower temperature after cold working. (A) Solid solution hardening (B) Screw dislocation (C) Strain ageing (D) Twinning

Description : __________ of a material results, when its strength is increased & ductility is decreased by heating at a relatively lower temperature after cold working. (A) Solid solution hardening (B) Screw dislocation (C) Strain ageing (D) Twinning

Last Answer : (C) Strain ageing

Pick out the correct statement. (A) Stainless steel is nothing but chromium coated steel (B) Hardening of a soft metal can be done by alloying it with another metal or non-metal (C) Plastic deformation of a material is its temporary distortion under the action of applied stress (D) Rusting of iron is not electrochemical in nature

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Last Answer : (B) Hardening of a soft metal can be done by alloying it with another metal or non-metal

In cold working of metal as compared to its hot working (A) Cracks and blow holes are eliminated (B) Ductility and impact strength improves (C) Appreciable strain hardening is produced (D) Yield stress, hardness and fatigue strength is not at all affected

Description : In cold working of metal as compared to its hot working (A) Cracks and blow holes are eliminated (B) Ductility and impact strength improves (C) Appreciable strain hardening is produced (D) Yield stress, hardness and fatigue strength is not at all affected

Last Answer : (C) Appreciable strain hardening is produced

Age hardening' of duralumin is due to (A) Copper (B) Magnesium (C) Both (A) & (B) (D) Neither (A) nor (B)

Description : Age hardening' of duralumin is due to (A) Copper (B) Magnesium (C) Both (A) & (B) (D) Neither (A) nor (B)

Last Answer : (C) Both (A) & (B)

Why hardening is practiced in vegetables: a. To increase the yield b. To increase fruit colour c. To increase the resistance of the plant d. All of the above

Description : Why hardening is practiced in vegetables: a. To increase the yield b. To increase fruit colour c. To increase the resistance of the plant d. All of the above

Last Answer : To increase the resistance of the plant

Hardening is a process of heating a metal to a) 400°C b) 500°C c) 600°C d) 700°C

Description : Hardening is a process of heating a metal to a) 400°C b) 500°C c) 600°C d) 700°C

Last Answer : c) 600°C

Conditioners like finely divided peat are added to the fertiliser to (A) Counteract burning (B) Avoid caking & hardening (C) Produce bulk (D) Increase its solubility

Description : Conditioners like finely divided peat are added to the fertiliser to (A) Counteract burning (B) Avoid caking & hardening (C) Produce bulk (D) Increase its solubility

Last Answer : (B) Avoid caking & hardening

Exposure to SO2 containing chimney gases results in the (A) Reduction in strength of leather & cloth (B) Acceleration of corrosion rates of metals (C) Increased drying & hardening time of paints (D) All (A), (B) and (C)

Description : Exposure to SO2 containing chimney gases results in the (A) Reduction in strength of leather & cloth (B) Acceleration of corrosion rates of metals (C) Increased drying & hardening time of paints (D) All (A), (B) and (C)

Last Answer : (D) All (A), (B) and (C)

Which of the following processes follows the hardening process for reducing the hardening strains & increasing the toughness of the steel part? (A) Anodising (B) Tempering (C) Carburising

Description : Which of the following processes follows the hardening process for reducing the hardening strains & increasing the toughness of the steel part? (A) Anodising (B) Tempering (C) Carburising

Last Answer : (B) Tempering

________ cannot increase the fatigue strength of a material. (A) Grain refining (B) Grain coarsening (C) Surface hardening (D) Shot peening

Description : ________ cannot increase the fatigue strength of a material. (A) Grain refining (B) Grain coarsening (C) Surface hardening (D) Shot peening

Last Answer : (B) Grain coarsening

The behaviour of a metal specimen, which when plastically strained in tension reduces its yield stress in compression and vice versa; is termed as the (A) Work hardening (B) Bauschinger effect (C) Creeping effect (D) Stress recovery effect

Description : The behaviour of a metal specimen, which when plastically strained in tension reduces its yield stress in compression and vice versa; is termed as the (A) Work hardening (B) Bauschinger effect (C) Creeping effect (D) Stress recovery effect

Last Answer : (B) Bauschinger effect

. Age hardening is connected with (A) Babbitt metal (B) Gun metal (C) Stainless steel (D) Duralumin

Description : . Age hardening is connected with (A) Babbitt metal (B) Gun metal (C) Stainless steel (D) Duralumin

Last Answer : D) Duralumin

Dislocation cross-slip is difficult in those materials, which have (A) Large number of slip systems (B) High work hardening rate (C) Coarse grain size (D) Low stacking fault energy

Description : Dislocation cross-slip is difficult in those materials, which have (A) Large number of slip systems (B) High work hardening rate (C) Coarse grain size (D) Low stacking fault energy

Last Answer : (D) Low stacking fault energy

Cold working of a material results in increase in hardness, which is termed as the __________ hardening. (A) Cold (B) Work (C) Age (D) Induction

Description : Cold working of a material results in increase in hardness, which is termed as the __________ hardening. (A) Cold (B) Work (C) Age (D) Induction

Last Answer : (B) Work

Globular form of cementite is formed during the __________ process. (A) Spheroidising (B) Hardening (C) Annealing (D) Normalising

Description : Globular form of cementite is formed during the __________ process. (A) Spheroidising (B) Hardening (C) Annealing (D) Normalising

Last Answer : (B) Hardening

Spheroidising of a material is a/an __________ process. (A) Normalising (B) Annealing (C) Tempering (D) Hardening

Description : Spheroidising of a material is a/an __________ process. (A) Normalising (B) Annealing (C) Tempering (D) Hardening

Last Answer : (B) Annealing

Hardening of steel is not possible, unless it is heated __________ critical point. (A) Above the highest (B) Above the lowest (C) Between the first & second (D) Between the second & third

Description : Hardening of steel is not possible, unless it is heated __________ critical point. (A) Above the highest (B) Above the lowest (C) Between the first & second (D) Between the second & third

Last Answer : (B) Above the lowest

Strain hardening effect in metals subjected to cold working is due to the __________ mechanism. (A) Slip (B) Fracture (C) Winning (D) Dislocation

Description : Strain hardening effect in metals subjected to cold working is due to the __________ mechanism. (A) Slip (B) Fracture (C) Winning (D) Dislocation

Last Answer : (D) Dislocation

Strain hardening effect in a metal subjected to cold working is due to the __________ mechanism. (A) Fracture (B) Dislocation (C) Slip (D) Twinning

Description : Strain hardening effect in a metal subjected to cold working is due to the __________ mechanism. (A) Fracture (B) Dislocation (C) Slip (D) Twinning

Last Answer : (C) Slip

Elimination of brittleness resulting from welding of saw blades is done by __________ of the welded portion. (A) Annealing (B) Toughening (C) Work hardening (D) Tempering

Description : Elimination of brittleness resulting from welding of saw blades is done by __________ of the welded portion. (A) Annealing (B) Toughening (C) Work hardening (D) Tempering

Last Answer : (A) Annealing