Determine the carbon content of steel, Mechanical Engineering

Determine the carbon content of steel:

A hypoeutetoid steel which was cooled slowly from γ-state to room temperature was found to contain 10% eutectoid ferrite. Suppose no change in structure occurred on cooling from just below the eutectoid temperature to room temperature. Determine the carbon content of steel.

Solution

Refer to phase diagram of Figure and let the vertical line xx cross the isotherm at 5 such that 5 is at a distance x′ from temperatures axis. After that by lever rule

% total ferrite = (6.67 - x′   )/ (6.67 - 0.025) = (6.67 - x′)/6.645

% proeutectoid ferrite =  0.80 -  x′ /0.80 - 0.025          =  0.80 -  x′/0.775

            % eutectoid ferrite = % total ferrite - % proeutectoid ferrite

or         10 /100  =  6.67 -  x′ /6.645=  0.80 -  x′/0.775

 0.51, 498 = 5.169 = 0.775 x′ - 5.316 + 6.645 x′

0.51, 645 = 5.87 x′

∴          x′ =  0.51645/3.87  = 0.088%

The steel has 0.088% C.

Posted Date: 1/22/2013 1:31:50 AM | Location : United States







Related Discussions:- Determine the carbon content of steel, Assignment Help, Ask Question on Determine the carbon content of steel, Get Answer, Expert's Help, Determine the carbon content of steel Discussions

Write discussion on Determine the carbon content of steel
Your posts are moderated
Related Questions
What is specific gravity? what do you mean by 1pascal? Concept of pressure difference? Sol) The "specific gravity" of a meterial is the ratio of its density to the density of

For a few of the following problems the constant acceleration is due to gravity and will be notated as a = g = 32 ft/sec 2 . 'g' perhaps positive or negative depending on the conte

(a) Show that all reversible engines operating between the same source and sink will have same efficiency. (b) A reversible heat engine operates between two reservoirs at temper


Description & Derivation of Mechanical Vibration in Strings, Rods and Aero Foil Flutter

In a nuclear power plant saturated steam at 30 bar enters a h.p. turbine and expands isentrophically to a pressure at which its quality is 0.841. At this pressure the steam is pass

how to determine proper the depth of cut for the tool if the drill is made of HSS and the work piece is made of alluminume alloy?

A square column 410 x 410 mm (along with 4 No. 16 mm bars) carries a dead load of 1020 kN and an imposed load of 410 kN. The foundation soil has a safe bearing capacity of 200 kPa.

First Law for Closed System Undergoing Change of State - thermodynamics: In accordance to first law, when system undergoes a thermodynamic process (change of state) heat and w

Joint Details and Preparations Joints shall be prepared by machining, flame cutting with grinding to bright metal or air-carbon arc gouging with grinding to bright metal such t