The dimensional and shape accuracy of vacuum castings prepared in plaster moulds
Journal Title: Archiwum Odlewnictwa - Year 2011, Vol 11, Issue 3
Abstract
The results of laboratory test on the dimensional and shape accuracy of bronze plaster castings CuSn10, CuSn5Zn5Pb5and AlSi11 silumin are presented in this paper. The test castings were made in form of rods of length 100mm and diameters 4 mm, 7 mm and 10mm. The temperatures of molten alloys were 1120, 1160 and 1200ºC for bronzes and 700, 750 and 800ºC for silumins. Mould temperatures 500 and 600ºC and 250 and 300ºC respectively. The relative dimension change in given technological conditions by relating to the wax model. Analogical researches were made for plate-like CuSn10 bronze castings by calculating the relative dimension change in two perpendicular axis. Obtained results allowed to state that temperature of cast alloy influences the relative dimensional change, next the mould temperature and type of material (CuSn5Zn5Pb5, CuSn10, AlSi11 relatively). The transverse dimension of the mould does not influence the dimensions of test castings. Temperature of the mould as well as casting temperature do not influence the shape accuracy of the castings.
Authors and Affiliations
M. Pawlak
Keywords
Related Articles
- EP ID EP72369
- DOI -
- Views 92
- Downloads 0
Application of heat treatment and hot extrusion processes to improve mechanical properties of the AZ91 alloy
The main aim of this paper is to evaluate the effects of hot working (extrusion) and hest treatment on room temperature mechanical properties of magnesium-based AZ91 alloy. The results were compared with as-cast conditio...
Investment casting or powder metallurgy – the ecological aspect
The paper presents an analysis of manufacturing methods of material-saving products in relation to investment castings and sintered powder technology. Surface microgeometry, shape accuracy, performance parameters, manufa...
Thin Wall Austempered Ductile Iron (TWADI)
In this paper the analysis of thin walled castings made of ductile iron is considered. It is shown that thin wall austempered ductile iron can be obtained by means of short-term heat treatment of thin wall castings witho...
The ATD thermal analysis of selected nickel superalloys
The study presents the results of the ATD thermal analysis made on selected nickel alloys used by WSK Rzeszów for parts of aircraft engines. The aim of the studies was investigation of solidification parameters, especial...
Control of cast iron and casts manufacturing by Inmold method
In this paper the usability of cast iron spheroidizing process in mould control by ATD method as well as by ultrasonic method were presented. Structure of instrumentation needed for control form performance of cast iron...