The following points highlight the four main factors affecting the hardenability of steel. The factors are: 1. Grain Size 2. Austenitising Temperature and Time 3. Carbon Content of the Steel 4. Alloying Elements in Steel. Factor # 1. Grain Size: Grain boundaries are the preferential nucleation sites for ferrite and pearlite. If austenitic grain size is large, the grain boundary [...]
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 [...]
In this article we will discuss about:- 1. Effect of Boron on Hardenability 2. Mechanism of Boron Hardenability 3. Hardenability Curve for Boron Steels 4. Effect of Alloying Elements. Effect of Boron on Hardenability: Boron (atomic radius 0.94 A), being the largest size interstitial solid solution forming element in iron has very limited solid solubility in γ - Fe, ~ [...]