Effectiveness of cast iron vermicularization including ‘conditioning’ of the alloy
Journal Title: Archiwum Odlewnictwa - Year 2011, Vol 11, Issue 2
Abstract
The performed investigations have resulted in conclusion that the vermicularizing treatment of ‘basic’ cast iron, consisting in ‘conditioning’ the alloy by means of VLCe(2) master alloy, introducing the DENODUL5 master alloy, and graphitizing with SRF75 master alloy, provides for obtaining vermicular graphite precipitates in the structure of material cast within 15 minutes’ period from the modifying treatment. The cast iron has been melted in the induction crucible furnace of medium frequency under industrial conditions. The alloy has been subjected to vermicularization in the slender ladle of 1 Mg capacity. Graphitizing has been performed in the course of transferring the cast iron from the slender ladle to the pouring ladle. A series of test coupons in the form of reversed U-blocks of test part walls 25 mm thick have been cast of the produced cast iron. Then specimens both for metallographic examination and for testing the mechanical properties have been taken from the coupons. The analysis of cast iron structure has revealed, among others, that however purely vermicular graphite precipitates occurred in specimens taken out of the lower parts of test coupon walls (which are cooled faster), the nodular graphite precipitates in quantity up to 10% could be observed in specimens from the upper parts of test coupon walls (located close beneath the sinkhead).
Authors and Affiliations
M. S. Soiński, P. Mierzwa
Keywords
Related Articles
- EP ID EP72553
- DOI -
- Views 124
- Downloads 0
Method of efficiency improvement of software used for solidification process simulations
This paper presents a new method that can be used to improve the efficiency of applications used for simulations of solidification processes. The new approach concentrate on conductivity matrix building process. This ope...
Effect of ring notch radius on the decohesion mode in AlSi alloys
The article discusses the effect of the, determined by tensile test, non-linear characteristics of AlSi alloys on the value of the shape factor k for the three different sizes of the radius of the ring notch made on roun...
Ferritic-austenitic cast steel - selected problems
The author has been involved in the problems occurring in the manufacture of ferritic-austenitic cast steel castings for many years. The author’s remarks and investigation results reported in this article will enable pot...
Effect of Magnesium Oxide Nanoparticles on Water Glass Structure
An attempt has been made to determine the effect of an addition of colloidal suspensions of the nanoparticles of magnesium oxide on the structure of water glass, which is a binder for moulding and core sands. Nanoparticl...
Strength properties of moulding sands with chosen biopolymer binders
The article presents the results of primary researches of the IV generation moulding sands, in which as the binders are used different biodegradable materials. The bending and the tensile strength of the moulding sands w...