How with alloying of steel it is possible to a achieve properties which can not be achieved with heat treatment ?

How with alloying of steel it is possible to a achieve properties which can not be achieved with heat
treatment ?
by

1 Answer

Answer :

A prerequisite to the hardening of steels is that martensite should be formed on cooling, but this can
only be achieved if the rate of cooling is great enough to suppress the formation of pearlite or bainite
and in plain carbon steels this can be achieved by quenching relatively small specimens
by

Related questions

State the effects of alloying elements on properties of steel.

Description : State the effects of alloying elements on properties of steel.

Last Answer : Effects of Alloying Element on steel:(Any 04 - 01 Mark each) 1) Nickel: i) It improves Toughness ii) It improves Tensile Strength iii) It improves Ductility iv) It improves Corrosion Resistance ... Impact Strength iii) It improves Fine Grain Growth iv) It is also called as Columbium

What is the effect of alloying element Cr & V on the properties of steel?

Description : What is the effect of alloying element Cr & V on the properties of steel?

Last Answer : Effect of alloying element Cr:- i) It increases hardness, toughness and tensile strength. ii) It increases wear resistance and resistance to corrosion. Effect of alloying element V:  ... tensile strength, ductility and shock resistance. ii) It increases air hardening and cutting quality.

What causes hardness in steel ? How heat treatment alters properties of steel ?

Description : What causes hardness in steel ? How heat treatment alters properties of steel ?

Last Answer : The shape and distribution of the carbides in the iron determines the hardness of the steel. Carbides can be dissolved in austenite is the basis of the heat treatment of steel. If ... range will produce the desired size and distribution of carbides in the ferrite, imparting different properties.

Explain the effects of alloying chromium and nickel in stainless steel.

Description : Explain the effects of alloying chromium and nickel in stainless steel.

Last Answer : Addition of nickel and chromium increases the tensile strength and increase in resistance to corrosion takes place.

Explain the effects of alloying chromium and nickel in stainless steel.

Description : Explain the effects of alloying chromium and nickel in stainless steel.

Last Answer : Addition of nickel and chromium increases the tensile strength and increase in resistance to corrosion takes place.

Steels with high carbon equivalent have poor Weldability, because in these steels during welding (A) Carbon and other alloying elements get oxidised from the weld pool (B) Excessive ferrite forms in the heat affected zone leading to poor toughness of the weld (C) Martensite forms in the heat affected zone leading to poor toughness/ductility of the weld (D) Segregation of carbon and other element occurs in the weld pool leading to poor properties of the weld

Description : Steels with high carbon equivalent have poor Weldability, because in these steels during welding (A) Carbon and other alloying elements get oxidised from the weld pool (B) Excessive ferrite forms in the ... of carbon and other element occurs in the weld pool leading to poor properties of the weld

Last Answer : (C) Martensite forms in the heat affected zone leading to poor toughness/ductility of the weld

Discuss the role of manganese in alloying steels.

Description : Discuss the role of manganese in alloying steels.

Last Answer : Manganese is an excellent deoxidizer and sulfur neutralizer, and improves the mechanical properties of steel, notably the ratio of yield strength to tensile strength at normal temperatures. As ... increases the crack sensitivity of weldments, particularly with steels of higher carbon content.

What is the role of silicon as alloying element in steels ?

Description : What is the role of silicon as alloying element in steels ?

Last Answer : Silicon contributes greatly to the production of sound steel because of its deoxidizing and degasifying properties. When added in amounts up to 2.5%, the ultimate strength of the steel ... properties of steel. Silicon increases the electrical resistivity of steel and decreases hysteresis losses.

What are the major effects of alloying elements?

Description : What are the major effects of alloying elements?

Last Answer : To alter the transformation temperatures and times To modify the room temperature and elevated temperature strengths of given structures by (a) stiffening the crystals and (B) introducing complex ... oxide film formed on the surface of the steel and thereby affect its corrosion resistance.

Stainless steel is usually made by alloying the steel with – (1) copper and nickel (2) copper and chromium (3) chromium and nickel (4) manganese and copper

Description : Stainless steel is usually made by alloying the steel with – (1) copper and nickel (2) copper and chromium (3) chromium and nickel (4) manganese and copper

Last Answer : (3) chromium and nickel Explanation: In metallurgy, stainless steel is defined as a steel alloy with a minimum of 10.5 per cent to 11 per cent chromium content by mass. There are ... virtually nonmagnetic and less brittle at low temperatures. For greater hardness and strength, more carbon is added.

Which of the following alloying elements is present in maximum percentage in high speed steel? (A) Molybdenum (B) Chromium (C) Tungsten (D) Vanadium

Description : Which of the following alloying elements is present in maximum percentage in high speed steel? (A) Molybdenum (B) Chromium (C) Tungsten (D) Vanadium

Last Answer : (C) Tungsten

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)

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

Description : 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) ... its temporary distortion under the action of applied stress (D) Rusting of iron is not electrochemical in nature

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

Which of the following alloying elements is present in maximum percentage in high speed steel? (A) Molybdenum (B) Chromium (C) Tungsten (D) Vanadium

Description : Which of the following alloying elements is present in maximum percentage in high speed steel? (A) Molybdenum (B) Chromium (C) Tungsten (D) Vanadium

Last Answer : (A) Molybdenum

Primary designation of steel is based on its (A) Hardness & tensile strength (B) Carbon content (C) Iron content (D) Alloying elements content

Description : Primary designation of steel is based on its (A) Hardness & tensile strength (B) Carbon content (C) Iron content (D) Alloying elements content

Last Answer : (D) Alloying elements content Sh

Which of the following is not a principal alloying element for the structural steel? (A) Molybdenum (B) Nickel (C) Manganese (D) Chromium

Description : Which of the following is not a principal alloying element for the structural steel? (A) Molybdenum (B) Nickel (C) Manganese (D) Chromium

Last Answer : (A) Molybdenum

All of the following alloying elements of steel increases hardness but sacrifice ductility, except (A) Nickel (B) Vanadium (C) Molybdenum (D) Chromium

Description : All of the following alloying elements of steel increases hardness but sacrifice ductility, except (A) Nickel (B) Vanadium (C) Molybdenum (D) Chromium

Last Answer : (A) Nickel

Maximum hardenability of steel depends upon its (A) Chemical composition (B) Carbon content (C) Grain size (D) Alloying elements content

Description : Maximum hardenability of steel depends upon its (A) Chemical composition (B) Carbon content (C) Grain size (D) Alloying elements content

Last Answer : Option D

Nickel and __________ are the alloying element added in steel to increase its toughness. (A) Molybdenum(B) Chromium(C) Vanadium(D) Silicon

Description : Nickel and __________ are the alloying element added in steel to increase its toughness. (A) Molybdenum (B) Chromium (C) Vanadium (D) Silicon

Last Answer : Option D

Alloying elements present in Haynes stellite, which has superior performance than high speed steel, are: (A) Nickel, cobalt & chromium (B) Tungsten, chromium & cobalt (C) Manganese, chromium & cobalt (D) Tungsten, molybdenum & nickel

Description : Alloying elements present in Haynes stellite, which has superior performance than high speed steel, are: (A) Nickel, cobalt & chromium (B) Tungsten, chromium & cobalt (C) Manganese, chromium & cobalt (D) Tungsten, molybdenum & nickel

Last Answer : Option B

Explain The Effects Of Alloying Chromium And Nickel In Stainless Steel.?

Description : Explain The Effects Of Alloying Chromium And Nickel In Stainless Steel.?

Last Answer : The addition of nickel and chromium increases the tensile strength and increase in resistance to corrosion takes place.

Which of the following are alloying materials used the manufacture of stainless steel? w) Limestone and carbon x) Calcium oxide and oxygen y) Oxygen and sulfur dioxide z) Chromium and nickel

Description : Which of the following are alloying materials used the manufacture of stainless steel? w) Limestone and carbon x) Calcium oxide and oxygen y) Oxygen and sulfur dioxide z) Chromium and nickel

Last Answer : ANSWER: Z -- CHROMIUM AND NICKEL

Stainless steel is usually made by alloying the steel with (1) copper and nickel (2) copper and chromium (3) chromium and nickel (4) manganese and copper

Description : Stainless steel is usually made by alloying the steel with (1) copper and nickel (2) copper and chromium (3) chromium and nickel (4) manganese and copper

Last Answer : chromium and nickel 

The heat transfer by radiation from a mild steel surface is to be reduced by reducing the emissivity of the surface. This can be best achieved by (A) Painting the surface black (B) Painting the surface white (with aluminium paint) (C) Giving the surface a mirror finish (D) Roughening the surface

Description : The heat transfer by radiation from a mild steel surface is to be reduced by reducing the emissivity of the surface. This can be best achieved by (A) Painting the surface black (B) ... white (with aluminium paint) (C) Giving the surface a mirror finish (D) Roughening the surface

Last Answer : (B) Painting the surface white (with aluminium paint)

What are the effects of carbon on the properties of steel.

Description : What are the effects of carbon on the properties of steel.

Last Answer : In general, an increase in carbon content produces higher ultimate strength and hardness but lowers ductility and toughness of steel alloys. Carbon also increases air-hardening tendencies and ... lessens the thermal and electrical conductivities of steel and increases its hardness on quenching.

Cefotaxime has the following properties except (a) It is highly active against aerobic gram negative bacteria (b) It is the most active cephalosporin against Pseudomonas aeruginosa (c) It produces an active metabolite (d) It has achieved high cure rates in serious hospital acquired infections

Description : Cefotaxime has the following properties except (a) It is highly active against aerobic gram negative bacteria (b) It is the most active cephalosporin against Pseudomonas aeruginosa (c) It produces an active metabolite (d) It has achieved high cure rates in serious hospital acquired infections

Last Answer : Ans: B

Cefotaxime has the following properties except: A. It is highly active against aerobic gram negative bacteria B. It is the most active cephalosporin against Pseudomonas aeruginosa C. It produces an active metabolite D. It has achieved high cure rates in serious hospital acquired infections

Description : Cefotaxime has the following properties except: A. It is highly active against aerobic gram negative bacteria B. It is the most active cephalosporin against Pseudomonas aeruginosa C. It produces an active metabolite D. It has achieved high cure rates in serious hospital acquired infections

Last Answer : B. It is the most active cephalosporin against Pseudomonas aeruginosa

First law of thermodynamics furnishes the relationship between  (a) heat and work  (b) heat, work and properties of the system  (c) various properties of the system  (d) various thermodynamic processes  (e) heat and internal energy.

Description : First law of thermodynamics furnishes the relationship between  (a) heat and work  (b) heat, work and properties of the system  (c) various properties of the system  (d) various thermodynamic processes  (e) heat and internal energy.

Last Answer : (b) heat, work and properties of the system

Heat and work are  (a) point functions  (b) system properties  (c) path functions  (d) intensive properties  (e) extensive properties.

Description : Heat and work are  (a) point functions  (b) system properties  (c) path functions  (d) intensive properties  (e) extensive properties.

Last Answer : Answer : c

Structuring and combining the primitives of the solid model in the graphics database,is achieved by the use of….. a.FEA b.transformations c.boolean operations d.none of the above

Description : Structuring and combining the primitives of the solid model in the graphics database,is achieved by the use of….. a.FEA b.transformations c.boolean operations d.none of the above

Last Answer : c.boolean operations

Which among the following definitions are correct: a) Object - Any entity that has state and behavior is known as an object. b) Class - Collection of objects is called class. It is logical entity. c) Inheritance -When one object acquires all the properties and behaviors of parent object its knonw as inheritance. It provides code re-usability and is used to achieve run time polymorphism. d) All of the above e) None of These

Description : Which among the following definitions are correct: a) Object - Any entity that has state and behavior is known as an object. b) Class - Collection of objects is called class. It is logical entity. c) ... re-usability and is used to achieve run time polymorphism. d) All of the above e) None of These

Last Answer : d) All of the above

Silico-manganese steels (containing 0.7% Mn, 0.5% C and 2% Si) (A) Do not require heat treatment for any of its applications (B) Are used for leaf and coiled springs (C) Do not have good resilience properties (D) Is tempered at 850°C

Description : Silico-manganese steels (containing 0.7% Mn, 0.5% C and 2% Si) (A) Do not require heat treatment for any of its applications (B) Are used for leaf and coiled springs (C) Do not have good resilience properties (D) Is tempered at 850°C

Last Answer : (B) Are used for leaf and coiled springs

Wrought iron is having very high (A) Hardness (B) Strength (C) Corrosion resistance (D) Susceptibility to changes in its properties by heat treatment

Description : Wrought iron is having very high (A) Hardness (B) Strength (C) Corrosion resistance (D) Susceptibility to changes in its properties by heat treatment

Last Answer : (C) Corrosion resistance

Highest cutting speed is achieved by the __________ tool material. (A) High speed steel (B) Carbide (C) Cast alloy (D) Plain carbon steel

Description : Highest cutting speed is achieved by the __________ tool material. (A) High speed steel (B) Carbide (C) Cast alloy (D) Plain carbon steel

Last Answer : (B) Carbide

DNA precipitation out of a mixture of biomolecules can be achieved by treatment with (a) chilled chloroform (b) isopropanol (c) chilled ethanol (d) methanol at room temperature.

Description : DNA precipitation out of a mixture of biomolecules can be achieved by treatment with (a) chilled chloroform (b) isopropanol (c) chilled ethanol (d) methanol at room temperature.

Last Answer : (c) chilled ethanol

The most important drawback of radioactive iodine treatment of Grave’s disease is: A. Subsequent hypothyroidism in many patients B. Marked side effect for 1-2 weeks after treatment C. High cost D. Permanent cure cannot be achieved

Description : The most important drawback of radioactive iodine treatment of Grave’s disease is: A. Subsequent hypothyroidism in many patients B. Marked side effect for 1-2 weeks after treatment C. High cost D. Permanent cure cannot be achieved

Last Answer : A. Subsequent hypothyroidism in many patients

The disc is made from of 5mm-10mm thickness. a) Heat treated steel b) Case hardened steel c) Stainless steel d) High speed steel

Description : The disc is made from of 5mm-10mm thickness. a) Heat treated steel b) Case hardened steel c) Stainless steel d) High speed steel

Last Answer : Heat treated steel

The biggest point sources of waste heat originate from ....... production. a) Steel or Brass b) Copper or Glass c) Steel or Glass d) Steel or Copper

Description : The biggest point sources of waste heat originate from ....... production. a) Steel or Brass b) Copper or Glass c) Steel or Glass d) Steel or Copper

Last Answer : Steel or Glass

is the Objective of the energy management from the following :- a) To give each product a label b) To evolve minimum energy consumption c) To minimize environmental effects d) To achieve optimum energy procurement

Description : is the Objective of the energy management from the following :- a) To give each product a label b) To evolve minimum energy consumption c) To minimize environmental effects d) To achieve optimum energy procurement

Last Answer :  To evolve minimum energy consumption 

Energy monitoring and targeting is built on the principle of ― ‖. a)production can be reduced to achieve reduced energy consumption‖ b)Consumption of energy is proportional to production rate‖ c)You cannot manage what you do not measure‖ d)None of the above

Description : Energy monitoring and targeting is built on the principle of ― ‖. a)production can be reduced to achieve reduced energy consumption‖ b)Consumption of energy is proportional to production rate‖ c)You cannot manage what you do not measure‖ d)None of the above

Last Answer : You cannot manage what you do not measure‖

Energy monitoring and targeting is built on the principle of ― _____‖ a) ―production can be reduced to achieve reduced energy consumption‖ b) ―Consumption of energy is proportional to production rate‖ c) ―You cannot manage what you do not measure‖ d) None of the above.

Description : Energy monitoring and targeting is built on the principle of ― _____‖ a) ―production can be reduced to achieve reduced energy consumption‖ b) ―Consumption of energy is proportional to production rate‖ c) ―You cannot manage what you do not measure‖ d) None of the above.

Last Answer : You cannot manage what you do not measure

The objective of energy management is ____ A. To achieve and maintain optimum energy procurement and utilization throughout the organization B. To minimize the energy cost without affecting production and quality C. To minimize the environmental effects D. All of the above

Description : The objective of energy management is ____ A. To achieve and maintain optimum energy procurement and utilization throughout the organization B. To minimize the energy cost without affecting production and quality C. To minimize the environmental effects D. All of the above

Last Answer : All of the above

Normally the guaranteed best approach a cooling tower can achieve is _____. • 5°C • 12°C • 8°C • 2.8°C

Description : Normally the guaranteed best approach a cooling tower can achieve is _____. • 5°C • 12°C • 8°C • 2.8°C

Last Answer : 2.8°C

Zinc is not used (A) For producing zinc base die casting alloys (B) In its oxide form as pigments (C) As anode for corrosion prevention in boiler (D) As an alloying element in various bronzes

Description : Zinc is not used (A) For producing zinc base die casting alloys (B) In its oxide form as pigments (C) As anode for corrosion prevention in boiler (D) As an alloying element in various bronzes

Last Answer : (D) As an alloying element in various bronzes

Maximum consumption of zinc is in (A) Alloying (B) Galvanising (C) Utensil manufacture (D) Electrical industr

Description : Maximum consumption of zinc is in (A) Alloying (B) Galvanising (C) Utensil manufacture (D) Electrical industr

Last Answer : (B) Galvanising

Softness of silver can be converted into hardness by alloying it with small quantity of (A) Copper & nickel (B) Zinc (C) Aluminium (D) Tin

Description : Softness of silver can be converted into hardness by alloying it with small quantity of (A) Copper & nickel (B) Zinc (C) Aluminium (D) Tin

Last Answer : (A) Copper & nickel

__________ does not contain tin as an alloying material. (A) Brass (B) Pewter (C) Solder (D) Babbitt metal

Description : __________ does not contain tin as an alloying material. (A) Brass (B) Pewter (C) Solder (D) Babbitt metal

Last Answer : (A) Brass

__________ does not contain copper as an alloying element, (A) Nichrome (B) Manganin (C) Perminvar (D) Monel metal

Description : __________ does not contain copper as an alloying element, (A) Nichrome (B) Manganin (C) Perminvar (D) Monel metal

Last Answer : (A) Nichrome

Nickel as a material of construction (A) Is used as an alloying element for both ferrous & non-ferrous alloys (B) Is paramagnetic below 415° C (its Curie temperature) (C) Diamagnetic (D) Has a body centred cubic (bcc) crystal lattice structure

Description : Nickel as a material of construction (A) Is used as an alloying element for both ferrous & non-ferrous alloys (B) Is paramagnetic below 415° C (its Curie temperature) (C) Diamagnetic (D) Has a body centred cubic (bcc) crystal lattice structure

Last Answer : (A) Is used as an alloying element for both ferrous & non-ferrous alloys