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Which of the following elements given below determine(s) the maximum attainable hardness in steel?
1. Chromium
2. Manganese
3. Carbon
4. Molybdenum
elect the correct answer using the code given below:
1. Chromium
2. Manganese
3. Carbon
4. Molybdenum
elect the correct answer using the code given below:
- a)1 only
- b)1 and 2
- c)3 only
- d)2 and 4
Correct answer is option 'C'. Can you explain this answer?
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Verified Answer
Which of the following elements given below determine(s) the maximum a...
Ans. (c) Molybdenum – Because of this lowering of the transformation point, molybdenum is most effective in producing desirable oil-hardening and air-hardening properties. Except for carbon, it has the
greatest hardening effect. Ni, Cr and Mo alloying additions improve hardenability of Medium carbon steels. Therefore 1 and 4 is correct but we have forgotten the effect of carbon on steel.
greatest hardening effect. Ni, Cr and Mo alloying additions improve hardenability of Medium carbon steels. Therefore 1 and 4 is correct but we have forgotten the effect of carbon on steel.
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Which of the following elements given below determine(s) the maximum a...
Introduction:
The hardness of steel is an important mechanical property that determines its ability to resist deformation, wear, and abrasion. It is influenced by various factors, including the composition of the steel. Among the elements commonly present in steel, chromium, manganese, carbon, and molybdenum play significant roles in determining the maximum attainable hardness.
Explanation:
1. Chromium: Chromium is a strong carbide former and is primarily responsible for the formation of chromium carbides in steel. These carbides are extremely hard and contribute to the overall hardness of the steel. Higher chromium content leads to increased hardness. Additionally, chromium also improves the steel's corrosion resistance, which is important in many applications.
2. Manganese: Manganese is another element that can enhance the hardness of steel. It forms manganese sulfides, which act as grain refiners and inhibit the growth of austenite grains during cooling. This refinement of the grain structure leads to increased hardness and strength.
3. Carbon: Carbon is perhaps the most important element in determining the hardness of steel. It forms various types of carbides, including cementite (Fe3C), which is extremely hard. The presence of higher carbon content leads to the formation of more carbides, resulting in increased hardness. However, excessive carbon content can also make the steel brittle.
4. Molybdenum: Molybdenum is a potent hardenability agent that promotes the formation of fine grain structures in steel. It forms carbides, which contribute to hardness. Molybdenum also improves the strength and toughness of steel, making it suitable for high-stress applications.
Conclusion:
In conclusion, the maximum attainable hardness in steel is determined by various elements, including chromium, manganese, carbon, and molybdenum. Chromium and manganese contribute to hardness by forming carbides and refining the grain structure, respectively. Carbon is crucial for the formation of carbides, while molybdenum enhances hardenability and strengthens the steel. Therefore, the correct answer is option 'C' - only carbon determines the maximum attainable hardness in steel.
The hardness of steel is an important mechanical property that determines its ability to resist deformation, wear, and abrasion. It is influenced by various factors, including the composition of the steel. Among the elements commonly present in steel, chromium, manganese, carbon, and molybdenum play significant roles in determining the maximum attainable hardness.
Explanation:
1. Chromium: Chromium is a strong carbide former and is primarily responsible for the formation of chromium carbides in steel. These carbides are extremely hard and contribute to the overall hardness of the steel. Higher chromium content leads to increased hardness. Additionally, chromium also improves the steel's corrosion resistance, which is important in many applications.
2. Manganese: Manganese is another element that can enhance the hardness of steel. It forms manganese sulfides, which act as grain refiners and inhibit the growth of austenite grains during cooling. This refinement of the grain structure leads to increased hardness and strength.
3. Carbon: Carbon is perhaps the most important element in determining the hardness of steel. It forms various types of carbides, including cementite (Fe3C), which is extremely hard. The presence of higher carbon content leads to the formation of more carbides, resulting in increased hardness. However, excessive carbon content can also make the steel brittle.
4. Molybdenum: Molybdenum is a potent hardenability agent that promotes the formation of fine grain structures in steel. It forms carbides, which contribute to hardness. Molybdenum also improves the strength and toughness of steel, making it suitable for high-stress applications.
Conclusion:
In conclusion, the maximum attainable hardness in steel is determined by various elements, including chromium, manganese, carbon, and molybdenum. Chromium and manganese contribute to hardness by forming carbides and refining the grain structure, respectively. Carbon is crucial for the formation of carbides, while molybdenum enhances hardenability and strengthens the steel. Therefore, the correct answer is option 'C' - only carbon determines the maximum attainable hardness in steel.
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Which of the following elements given below determine(s) the maximum attainable hardness in steel?1. Chromium2. Manganese3. Carbon4. Molybdenumelect the correct answer using the code given below:a)1 onlyb)1 and 2c)3 onlyd)2 and 4Correct answer is option 'C'. Can you explain this answer?
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