Development of the fundamentals of melting and casting technology of Al-Me (Cr, Ni, Mo, W, Ti) master alloys used for modification of microstructure in silumins
Journal Title: Archiwum Odlewnictwa - Year 2009, Vol 9, Issue 2
Abstract
The study presents the technological backgrounds of the process of melting and casting Al-Cr, Al-Ni, Al-Mo, Al-W and Al-Ti master alloys, used as refiners of the microstructure of cast silumins. Basing on the analysis of phase equilibrium diagrams for an Al-Me (Cr, Ni, Mo, W, Ti) system at a temperature of 900oC, the characteristic intermetallic phases of AlxMey were investigated. Due to their similarity with Al and Si in respect of both structure and lattice arrangement, these phases may act as heterogeneous nuclei and promote solution hardening during, e.g., heat treatment. Using the method of thermal analysis ATD, the temperature was plotted in function of time, and then the characteristic values of the solidification parameters of master alloys were read out from the respective curves.
Authors and Affiliations
Jarosław Piątkowski
Keywords
Related Articles
- EP ID EP70435
- DOI -
- Views 119
- Downloads 0
Primary and secondary crystallization of modified hypoeutectic chromium cast iron
The paper presents investigations of crystallization of modified hypoeutectic wear resistant chromium cast iron which contains carbon about 2% and chromium on three levels (12%, 18% and 25%). Three substances were applie...
Health and safety at work in foundry companies
The article presents the identification and analysis of threats in the environment of the foundry at individual stages of the casts manufacturing process. A generalized model of the foundry was created in the system pres...
Application of laser optical displacement sensor to foundry processes control and research
An experimental set-up elaborated for distance measurement with a use of a laser optical displacement sensor has been described. The features of the elaborated device allow to measure a surface roughness and dimensions o...
Use of barbotage refining of aluminumsilicon alloy to improve mechanical properties of high pressure die castings
This study presents the research results of the influence that barbotage refining on the mechanical properties of high pressure die casting made of AlSi12S alloy. The operation of refining was conducted in a melting furn...
Control of rebonding sand mixing as a condition for optimisation of the sand feeding system in the casting line
In order to ensure the effective operation of the casting line, synthetic sand containing bentonite has to be fed in a precisely controlled quality and quantity. The required quantity is ensured by mixing stations outfit...