The influence of nickel and copper on the austempering of ductile iron |
| |
Authors: | U Batra S Ray S R Prabhakar |
| |
Affiliation: | (1) Department Of Metallurgical Engineering, Punjab Engineering College, Chandigarh, India;(2) Department of Metallurgical and Materials Engineering, IIT Roorkee, India;(3) Principal, Indo Global College of Engineering and Technology, India |
| |
Abstract: | In the present investigation, the effect of alloying elements on the austempering process, austempered microstructure, and
structural parameters of two austempered ductile irons (ADI) containing 0.6% Cu and 0.6% Cu/1.0% Ni as the main alloying elements
was investigated. The optical metallography and x-ray diffraction were used to study the changes in the austempered structure.
The effect of alloying additions on the austempering kinetics was studied using the Avrami equation. Significantly more upper
bainite was observed in the austempered Cu-Ni alloyed ADI than in Cu alloyed ADI. The volume fraction of retained austenite
(X
γ), the carbon level in the retained austenite (C
γ), and the product X
γ
C
γ in an austempered structure of Cu-alloyed ADI are higher than in Cu-Ni-alloyed ADI. The austempering Kinetics is slowed down
by the addition of Ni. |
| |
Keywords: | alloying addition austempering austenitization bainitic transformation retained austenite |
本文献已被 SpringerLink 等数据库收录! |
|