0
What else can I help you with?
Why grey cast iron is weak in tension?
based on the microstructure of gray cast iron, the graphite form flakes, which is tiny flakes that tend to weaken the matrix structure in tension. it tend to fail in diagonal shear.
What is differentiate between steel and Cast iron with reference to their carbon percentage and hardness?
iron with 1.5% of carbon by volume or less is called carbon steel and above 1.5% it is called cast iron, hardmess increases with the carbon % i.e. cast iron is harder than carbon steel
How you connect carbon steel with ductile iron?
Carbon Steel refers to various varieties of steel, hence carbon content is limited to max. 2.1%Low carbon steel: Carbon content less than 0.3%, also known as mild steel, very soft and ductile, easily machinable.Medium Carbon Steel: Carbon content varies from 0.3 to 0.5%, responsive to heat treatment, Good machinibility, good tougness and ductility properties and weldability.High Carbon Steel: Greater than 0.5%C. Greater strength as compared to LC and MC steel, accompanied with hardness, Toughness is imparted through heat treatment.Ductile Iron is essentially a Cast iron, with max. caron content upto 4-4.5%. Cast irons are generally hard and brittle in nature dur to such high carbon content. But depending upon the cooling rate the ductile iron contains carbon in spheroidal graphite form instead of flake form. This results in the formation of a ductile matrix, hence Ductile Cast Iron is relatively ductile with respect to other cast iron varieties and also it has good corrosion resistant prpoerties.
How does the shape of graphite in cast iron affect its properties?
The shape of graphite in cast irons has the following basic forms: (a) Flakes. Graphite flakes have sharp edges which act as stress raisers in tension. This shape makes cast iron low in tensile strength and ductility, but it still has high compressive strength. On the other hand, the flakes also act as vibration dampers, a characteristic important in damping of machine-tool bases and other structures. (b) Nodules. Graphite can form nodules or spheroids when magnesium or cerium is added to the melt. This form has increased ductility, strength, and shock resistance compared to flakes, but the damping ability is reduced. (c) Clusters. Graphite clusters are much like nodules, except that they form from the breakdown of white cast iron upon annealing. Clusters have properties that are basically similar to flakes. (d) Compacted flakes. These are short and thick flakes with rounded edges. This form has properties that are between nodular and flake graphite. © 2008 Pearson Education, Inc., Upper Saddle River, NJ. All rights reserved.
Why cast iron is good for machine bases?
Grey cast iron is good for machine bases due to its capacity of absorbing vibration. This can be explained through its microstructure, where graphite works as great shock absorber.
What is free carbon in cast iron?
Free carbon in cast iron refers to carbon that exists in its elemental form within the iron matrix. It appears as graphite flakes or nodules, contributing to the material's unique properties, such as high fluidity during casting and improved machinability. This free carbon distinguishes cast iron from other metals.
Why dont you have to use coolant while machining cast iron?
As far as i know, coolant is not required while machining cast iron because, carbon in cast iron is present in the form of graphite (which is a cooling agent - self cooling). Moreover the carbon content is high in cast iron.
Why grey cast iron is weak in tension?
based on the microstructure of gray cast iron, the graphite form flakes, which is tiny flakes that tend to weaken the matrix structure in tension. it tend to fail in diagonal shear.
What is the effect carbon content on steel?
Carbon is primary hardening element in steel. Hardness and tensile strength increases as carbon content increases upto 0.85%. Ductility and weldability decreases as carbon content increases. If the solution of carbon and liquid iron is solidified slowly the carbon tends to separate out in the form of graphite flakes (Grey cast iron). It is easily machinable. If the same iron is cast and colled quickly, it is hard and has a higher tensile strength, is difficult to machine (white cast iron).
What is maximum carbon in steel?
Steel with a carbon content above 2.0% is considered cast iron so the limit is 2.0%. Grey cast iron starting at 2.5% is basically a mix of ferrite carbides and graphite. Going higher above cast iron is pure carbide or Fe3C at 6.1%. Above that and it's basically a mix of iron graphites.
What iron is made by annealing white cast iron?
malleable cast iron has temper graphite
What is the name of the mineral found in diamonds?
Carbon. Other trace minerals may give the diamond colour, such as boron, which gives a diamond a blue cast or nitrogen, which gives a diamond a yellow cast.
Why does graphite give dampen vibration in gray cast irons?
Graphite in gray cast irons has damping properties due to its ability to absorb and dissipate energy during vibration. The graphite flakes act as internal boundaries that help absorb and dampen the vibrations. This results in reduced noise and improved mechanical properties of the material.
What minerals are in a car engine?
cast iron, aluminum, graphite and magnesium
Is a cast iron sink better then a graphite sink?
No The cast is made out of fiber glass and the cast would form into crystals.
What does SGI on a engine block mean?
Spheroidal Graphite (Cast) Iron. As the name implies, graphite is present in spheroidal form instead of flakes and compared with Grey Cast Iron it has higher mechanical strength, ductility and increased shock resistance.
Is cast iron contains carbon?
cast iron contain a considerable amount of carbon
