Cementite

hardness 1, . The microstructure transformation is very complex: Stage1: The formation of transition carbides and lowering of the carbon content of the martensite to 0.25% (100 to 250℃) Stage2: The transformation of retained austenite to ferrite and cementite (200 to 300℃) Stage3: The replacement of transition carbides and low-temperature

Material Properties of Steel Steel is an alloy of iron, with carbon being the primary solute in the solid solution. It is a polycrystalline solid with grain diameter from 10 to 20 micro-meter (Ashby et al). The presence of impurity like carbon causes the crystal lattice distortions to increase, hence making giving steel better hardness, yield strength, and tensile strength, at the cost of ductility. Pure iron being very ductile but comparatively weak, steel is widely because of its greater load bearing

and Carbon (C). • The Fe-C phase diagram is a fairly complex one, but we will only consider the steel part of the diagram, up to around 7% C b d Carbon. • Phases present α-ferrite, γ-ferrite, δ-ferrite, Fe3C (iron carbide or cementite) Fe-C liquid solution School of Mechanical and Building Sciences, VIT University, Vellore 1 Phases in Fe–Fe3C Phase Diagram α-ferrite - solid solution of C in BCC Fe • Stable form of iron at room temperature. • The maximum solubility

Heat Treatment and Qualitative Metallographic Analysis Lab ME 3228: Mechanics & Materials Laboratory Summary Comparing a material's initial treatment and the microstructures that are formed from different processes, an engineer can accurately understand why certain treated materials of the same family can be stronger than another. In this experiment annealed and cold-worked specimens of AISI 1018 STEEL are used, along with a Hardness tester, a grinding and polishing process, and a micrograph

By varying the carbon content, cooling rates, we will get different microstructure of steels that yield different properties which can be tailored to meet different engineering applications. In this experiment, the hardness of 3 steel alloys with varying Carbon compositions will be compared. With different amounts of Pearlite formed, we can also estimate the hardness of pure pearlite and ferrite. Lastly, the fourth sample will be quenched in water and a Martensitic structure will be observed. We

Introduction The titanic was one of the supreme distinguished, British passenger liners; it was commissioned by the white star and was manufactured in Harland and Wolff shipyard, which is situated in Belfast. The manufactures of historic ship started work on the date 31st March 1909. The titanic was an iconic structure, it was the most quickest and most impressive liner created during that era. After three years passing, the titanic construction had been completed, the “deluxe streamline machine”

Department of Metallurgical and Materials Engineering INDIAN INSTITUTE OF TECHNOLOGY ROORKEE Case Study Report: Prediction of Isothermal Transformation Diagram UNDER THE GUIDANCE OF Dr. Sourav Das SUBMITTED BY Divyanshu Gupta (13118021) Vertika Bansal (13118104) Contents Contents 2 Introduction to Time – Temperature – Transformation (TTT) diagram 3 Applications of TTT diagrams 4 TTT diagrams are helpful in

Introduction Metallurgy is the field of materials science and material engineering that studies the physical and chemical behaviour of metallic elements, their microstructure compounds and their mixtures, which are mostly known as alloy. Metallurgy can be refers as the technology of metals where science is applied to the production of metals, and the engineering of metal components for the uses of products for consumers and manufacturers. Metals are widely use in industrial, economic growth and

Comparison of Cast Iron and Steel Composition, Microstructure and Classification Cast Iron and Steel are ferrous alloys – means iron is their prime constituent. In cast iron the carbon content is higher than steel. In most of the cast irons carbon exists as graphite. Graphite formation is regulated by the composition and rate of cooling. Silicon concentration greater than about 1 wt% and slower cooling rates during solidification of liquid cast iron favor graphitization. On the other hand, steels

------------------------------------------------- Alloy Steel is a metal alloy whose major component is iron, with carbon content between 0.02% and 2.14% by mass. An alloy is a metallic solid solution composed of two or more elements. Complete solid solution alloys give single solid phase microstructure, while partial solutions give two or more phases that may or may not be homogeneous in distribution, depending on thermal (heat treatment) history. Alloys usually have different properties from those