Tag Archives | Steels

Heating of Steels: Furnace Atmospheres and Its Conditions | Metallurgy

In this article we will discuss about the types of furnace atmosphere and process of choosing controlled furnace atmosphere for heating of steel. Types of Furnace Atmospheres for Heating of Steels: 1. Exothermic Atmospheres: This name has been given to these atmospheres because these are produced by the exothermic combustion (i.e. without the addition of heat) of gas, and air, [...]

By |2017-10-24T05:51:42+05:30October 24, 2017|Steel|Comments Off on Heating of Steels: Furnace Atmospheres and Its Conditions | Metallurgy

Jominy End-Quench Test for Hardenability of Steel | Metallurgy

In this article we will discuss about:- 1. Introduction to Jominy End-Quench Test for Hardenability of Steel 2. Correlation between Jominy Test Distance and Grossman Method, D­I  3. Generation of Jominy Curve 4. Hardenability Bands 5. Calculation of Jominy Curve from Composition in Steels. Contents: Introduction to Jominy End-Quench Test for Hardenability of Steels Important Aspect of Jominy End Quench [...]

By |2017-10-24T05:51:41+05:30October 24, 2017|Steel|Comments Off on Jominy End-Quench Test for Hardenability of Steel | Metallurgy

Types of Stainless Steels: 5 Types | Alloy Steels | Metallurgy

Stainless steels could be divided into five categories: 1. Ferritic Stainless Steels 2. Martensitic Stainless Steels 3. Austenitic Stainless Steels 4. Duplex Stainless Steels 5. Precipitation Hardenable Stainless Steels. Type # 1. Ferritic Stainless Steels: These are iron-chromium alloys having chromium from 11.5 to 27% but usually between 17 to 26%. These alloys are ferritic in structure up to the [...]

By |2017-10-24T05:51:38+05:30October 24, 2017|Steel|Comments Off on Types of Stainless Steels: 5 Types | Alloy Steels | Metallurgy

Heat Treatment after Carburising | Steel | Metallurgy

Carburised parts are generally heat treated for following reasons: 1. To develop hard and wear resistant surfaces. 2. The long lime and high temperatures during carburising may cause grain coarsening in core and or case. These may be refined to improve their properties like impact strength, etc. 3. If carburising has resulted in cementite network at the surface, it induces [...]

By |2017-10-24T05:51:35+05:30October 24, 2017|Steel|Comments Off on Heat Treatment after Carburising | Steel | Metallurgy

What Controls Surface Hardness of Steels? | Metallurgy

Get the answer of: What Controls Surface Hardness of Steels? Surface hardness is mainly dependent on the carbon dissolved in austenite at the carburising temperature. When the carbon content at the surface particularly of alloy case hardening steel exceeds 0.70%, the Ms temperature decreases sharply. This means that the amount of retained austenite after quenching increases which results in decreased [...]

By |2017-10-24T05:51:34+05:30October 24, 2017|Steel|Comments Off on What Controls Surface Hardness of Steels? | Metallurgy
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