Influence of Mould Heat Storage Capacity on Properties of Grey Iron

Adedayo, A.V.; Aremo, Bolaji

doi:10.4236/jmmce.2011.104028

Cited by 6 publications

(4 citation statements)

References 6 publications

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“…The thermal conductivity of moulding sand significantly affects casting microstructure and mechanical properties [79][80][81][82][83][84][85]. The high cooling rate of casting reduces solidification time, grain size, and dendrite arm spacing, and the density of the grains increases [86].…”

Section: Ferrochrome Slagmentioning

confidence: 99%

Challenges and Future Prospective of Alternative Materials to Silica Sand for Green Sand Mould Casting: A Review

Sadarang

Nayak

Panigrahi

2021

Trans Indian Inst Met

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Near-net shape casting having complex geometry is manufactured through the sand casting process. However, day by day, the availability of natural or synthetic silica sand has been decreasing and increasing the production cost of sand casting components. Therefore, there is a need to look into low-cost and readily available alternative materials to substitute the commercial-grade silica sand for the sand mould casting process. The constituent of silica sand is primarily silica (SiO 2 ), Al 2 O 3 , and Fe 2 O 3 . The major constituents of industrial wastes such as fly ash, blast furnace slag, ferrochrome slag, stone dust, and red mud have SiO 2 , Al 2 O 3 , and Fe 2 O 3 . Therefore, industrial wastes may be used individually or combined with silica sand at a different ratio to substitute the commercialgrade silica sand in green mould castings. Researchers and scientists have evaluated the suitability of industrial wastes and local riverbed sand as an alternative material for green sand mould castings. The present review summarizes the advantages and constraints of using industrial wastes and local riverbed sand as an alternative to green sand mould casting process.

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Section: Ferrochrome Slagmentioning

confidence: 99%

Challenges and Future Prospective of Alternative Materials to Silica Sand for Green Sand Mould Casting: A Review

Sadarang

Nayak

Panigrahi

2021

Trans Indian Inst Met

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“…In thin wall casting technology where reduction in heat loss of the cast part is required in order to reduce cooling rate, additives are incorporated into the moulding sand so as to reduce its thermal conductivity. The authors of [4] investigated the effect of silica sand prepared by addition of varying percentages of iron fillings on the microstructure and properties of gray iron. The iron fillings served to vary the heat storage capacity (HSC) of the mould material and had significant effect on the as-cast gray iron mechanical properties.…”

Section: Introductionmentioning

confidence: 99%

Effect of Aluminum Dross and Rice Husk Ash on Thermal and Moulding Properties of Silica Sand

Ochulor¹,

Amuda²,

Adeosun³

et al. 2017

Nig. J. Tech.

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Moulding properties of foundry sand should be controlled so as to minimize casting defects. Its thermal characteristics are vital in defining the solidification kinetics of a cast part,Â evolving microstructure and mechanical properties. Modification of the thermal properties of the moulding sand mix is important in achieving desired structure and mechanical properties in the cast component. This study investigates the incorporation of 2-12 wt. % aluminium dross (AlDr) and 1-6 wt. % rice husk ash (RHA) in silica sand on moulding and thermal properties of the resulting sand mix. Results show that RHA significantly reduced thermal conductivity of the moulding sand from 1.631-1.141 W/m. K (a 30% reduction).However, AlDr increased its thermal conductivity from 1.631-1.787 W/m.K for 1-6 wt. % AlDr, which later dropped progressively from 1.753-1.540 W/m.K for 8-12 wt. %. The moisture content increased abruptly from 4.0-4.2 % for 6-8 wt. % AlDr addition but decreased from 4.0-2.8% for0-6 wt. % RHA addition in the moulding sand mix.Â http://dx.doi.org/10.4314/njt.v36i3.19

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“…Fusion welding processes were rapidly developed and improved upon [2]. High amount of carbon, silicon [3] with combination of other elements increases the carbon equivalent of cast iron. High carbon equivalent decreases cast iron's weldability.…”

Section: Introductionmentioning

confidence: 99%

Weldability Assessment of Preheated Ductile Iron Microstructures

Kwa¹,

Borode²,

Momoh³

2012

JMMCE

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When joining ductile iron by submerged arc welding technique, a suitable welding speed and current, among other factors, need to be skillfully put in place so as to enhance good welding. This work is based on microstructural examination of preheated ductile iron at various temperatures ranging between 100˚C -400˚C. Optical microscope was used for the microstructure analysis. The result shows varied complex microstructures at the fusion zone, un-mixed zone, partially melted zone and at the heat affected zone. 1001 Plate 1. (a) Microstructure of ductile iron showing graphite nodules in a pearlitic matrix. ×200; (b) fusion line view of specimen welded without preheating. 2% nital etch, ×100. Plate 2. (a) fusion line view of specimen welded after preheating at 100 ᵒ C. ×100; (b) fusion line view of specimen welded after preheating at 150 ᵒ C. ×100; (c) fusion line view of specimen welded after preheating at 200 ᵒ C. ×100; (d) fusion line view of specimen welded after preheating at 250 ᵒ C. ×100; (e) fusion line view of specimen welded after preheating at 300 ᵒ C. ×100; (f) fusion line view of specimen welded after preheating at 350 ᵒ C. ×100; (g) fusion line view of specimen welded after preheating at 400 ᵒ C. 2% nital etch, ×100.

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Influence of Mould Heat Storage Capacity on Properties of Grey Iron

Cited by 6 publications

References 6 publications

Challenges and Future Prospective of Alternative Materials to Silica Sand for Green Sand Mould Casting: A Review

Challenges and Future Prospective of Alternative Materials to Silica Sand for Green Sand Mould Casting: A Review

Effect of Aluminum Dross and Rice Husk Ash on Thermal and Moulding Properties of Silica Sand

Weldability Assessment of Preheated Ductile Iron Microstructures

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