Second Report of the Research Committee on High-Duty Cast Irons for General Engineering Purposes

After the publication of the First Report in December 1938,† work was continued on alloyed cast irons in accordance with the Committee's programme. This work was in active progress when the outbreak of war directed the attention of the Committee to those matters within its province which would most assist the national effort. Chief among these was the necessity for making the fullest use of the national resources in phosphoric ores, and hence it was decided to provide engineers with a report on phosphoric irons. The present report is wholly concerned with engineering phosphoric grey cast irons, free from alloying elements, used in the as-cast condition and manufactured in the ordinary way. A further report will be made on alloyed phosphoric high-duty irons.

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Discussion on First Report of the Research Committee on High-Duty Cast Irons for General Engineering Purposes

Proceedings of the Institution of Mechanical Engineers ◽

10.1243/pime_proc_1940_143_031_02 ◽

1940 ◽

Vol 143 (1) ◽

pp. 218-220

Keyword(s):

Cast Irons ◽

Research Committee ◽

First Report

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Third Report of the Research Committee on High-Duty Cast Irons for General Engineering Purposes

Proceedings of the Institution of Mechanical Engineers ◽

10.1243/pime_proc_1943_149_025_02 ◽

1943 ◽

Vol 149 (1) ◽

pp. 103-112 ◽

Cited By ~ 2

Author(s):

J. G. Pearce

Keyword(s):

Mechanical Properties ◽

Cast Irons ◽

Research Committee ◽

Standard Specification ◽

The Third ◽

Alloyed Cast ◽

Nickel Copper ◽

The Subject ◽

Better Than ◽

Alloy Cast

The Third Report was originally projected as the Second Report,† but the necessity of making use, under war conditions, of the most readily available indigenous ores, caused the Committee to concentrate immediate work on the influence of phosphorus upon mechanical properties. The Second Report has already dealt with the influence of this element on the properties of the plain cast irons, whilst the Addendum to the Second Report‡ covers the alloyed cast irons. The Third Report contains in Part 1 further results on commercially made high-duty cast iron, i.e. those equivalent in properties to, or better than, grade 2 of British Standard Specification No. 786 (1938), and in Part 2 the results of the remainder of the experimental programme concerning alloy cast irons, showing the influence of additions of nickel, copper, chromium, and molybdenum, both severally and in various combinations, on certain selected compositions. Both parts of this Report refer to the machinable engineering cast irons, having a pearlitic structure with normal flake graphite, covered by class 11 of the classification§ given in the Reports on Special-Duty Cast Irons. The more recently developed so-called acicular cast irons, showing excellent mechanical properties, do not fall within this category, and are being made the subject of experimental work.

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Research Department. First report of the Research Committee, 30 June, 1939

Journal of the Institution of Production Engineers ◽

10.1049/jipe.1939.0040 ◽

1939 ◽

Vol 18 (9) ◽

pp. 389

Keyword(s):

Research Committee ◽

First Report ◽

Research Department

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Founding. Grey cast irons

10.3403/01167911 ◽

1997 ◽

Keyword(s):

Cast Irons ◽

Grey Cast

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Grey cast irons. Classification

10.3403/30354759u ◽

2020 ◽

Keyword(s):

Cast Irons ◽

Grey Cast

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Grey cast irons. Classification

10.3403/30354759 ◽

2019 ◽

Keyword(s):

Cast Irons ◽

Grey Cast

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Ce-Bearing FeSi Alloy Inoculation of Electrically Melted, Low Sulphur Grey Cast Irons for Thin Wall Castings

Metals ◽

10.3390/met11071122 ◽

2021 ◽

Vol 11 (7) ◽

pp. 1122

Author(s):

Irina Varvara Balkan ◽

Iulian Riposan

Keyword(s):

Wall Thickness ◽

Structural Characteristics ◽

Cooling Curve ◽

Thin Wall ◽

Cast Irons ◽

Iron Castings ◽

Grey Cast ◽

The Difference ◽

Thermal Cooling ◽

Fesi Alloy

Electrically melted and over-heated (>1500 °C) grey cast iron at less than 0.04%S, as commonly used, solidifies large amounts of carbides and/or undercooled graphite, especially in thin wall castings; this is necessary to achieve a stronger inoculation. The efficiency of Ce-bearing FeSi alloy is tested for lower ladle addition rates (0.15 and 0.25 wt.%), compared to the base and conventional inoculated iron (Ba,Ca-bearing FeSi alloy). The present work explores chill and associated structures in hypoeutectic grey iron (3.6–3.8%CE, 0.02%S, (%Mn) × (%S) = 0.013–0.016, Alres < 0.002%), in wedge castings W1, W2 and W3 (ASTM A 367, furan resin sand mould), at a lower cooling modulus (1.1–3.5 mm) that is typically used to control the quality of thin wall iron castings. Relatively clear and total chill well correlated with the standard thermal (cooling curve) analysis parameters and structural characteristics in wedge castings, at different wall thickness, displayed as the carbides/graphite ratio and presence of undercooled graphite morphologies. The difference in effects of the two inoculants addition is seen as the ability to decrease the amount of carbides and undercooled graphite, with Ce-bearing FeSi alloy outperforming the conventional inoculant, especially as the wall thickness decreased. It appears that Ce-bearing FeSi alloy could be a solution for low sulphur, electric melt, thin wall iron castings production.

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