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stream inoculation

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Published: 09 June 2014
Fig. 48 Diagram of late stream inoculation with constant monitoring. Source: Ref 45 More
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Published: 01 December 2008
Fig. 8 Schematic showing the principle of stream inoculation. Source: Ref 14 More
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Published: 31 August 2017
Fig. 12 Diagram of late stream inoculation with constant monitoring More
Series: ASM Handbook
Volume: 1A
Publisher: ASM International
Published: 31 August 2017
DOI: 10.31399/asm.hb.v01a.a0006329
EISBN: 978-1-62708-179-5
... 40 gray iron castings are presented in a table. The article describes the induction melting and arc furnace melting used in gray iron foundries. It also reviews the inoculation methods such as stream inoculation and mold inoculation, of gray iron. alloying arc furnace melting cast iron...
Series: ASM Handbook
Volume: 1A
Publisher: ASM International
Published: 31 August 2017
DOI: 10.31399/asm.hb.v01a.a0006310
EISBN: 978-1-62708-179-5
.... Late metal stream inoculation, in which only very small quantities of inoculant are added, is beneficial. The balance of moisture in green sand with the clay content and the intensive mixing of those materials minimizes the risk of hydrogen pinholes. Boron Boron has been shown to promote ferrite...
Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005294
EISBN: 978-1-62708-187-0
... performance in a particular base iron under a given set of foundry conditions. Addition Methods Ladle inoculation is a common method of treating gray iron. In this method, the alloy is added to the metal stream as it flows from the transfer ladle into the pouring ladle. A small heel of metal should...
Series: ASM Handbook
Volume: 4C
Publisher: ASM International
Published: 09 June 2014
DOI: 10.31399/asm.hb.v04c.a0005903
EISBN: 978-1-62708-167-2
... it with the melt stream at approximately 2 3 of the filling time. If the melt is passed on to a pouring furnace, ladle inoculation should be avoided, if possible. This is primarily because the inoculation effect is gradually lost with time spent in the pouring furnace d, secondly, because the oxides...
Image
Published: 01 December 2008
Fig. 14 Nodule numbers in ductile irons inoculated with foundry-grade ferrosilicon (75% Si) added either to the ladle or to the metal stream. Source: Ref 21 More
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003174
EISBN: 978-1-62708-199-3
... in the casting. Fig. 9 General classification of inoculants showing chill reduction in iron with carbon equivalence of 4.0 Addition Methods Inoculants may be added to the melt in a number of different ways. Ladle inoculation is common; in this, the alloy is added to the stream of metal...
Series: ASM Handbook
Volume: 1A
Publisher: ASM International
Published: 31 August 2017
DOI: 10.31399/asm.hb.v01a.a0006316
EISBN: 978-1-62708-179-5
... modifiers, preconditioners, and inoculants has proved effective in obtaining the desired properties in the thinner castings. Different inoculation processing methods can be used to produce TWGCI, including the transfer and pouring ladle processes, the late stream process, and the in-mold process...
Series: ASM Handbook
Volume: 1A
Publisher: ASM International
Published: 31 August 2017
DOI: 10.31399/asm.hb.v01a.a0006315
EISBN: 978-1-62708-179-5
... is inoculated in the mold either by the in-mold or an in-stream method. With these techniques there would be no further problem of inoculation fade using any of the controlled inoculants either as fine particles, lumps, pellets, or tablets, although poorly nucleated iron from the furnace or the autopour...
Series: ASM Handbook
Volume: 1A
Publisher: ASM International
Published: 31 August 2017
DOI: 10.31399/asm.hb.v01a.a0006328
EISBN: 978-1-62708-179-5
... influence the location of the CGI plateau. The sensitivity to inoculation is illustrated in Fig. 9 , which shows that the addition of 80 g (3 oz) of inoculant (a typical amount for the final in-stream inoculation of gray or ductile iron) to a one-tonne ladle can change the nodularity from <5% to >30...
Series: ASM Handbook
Volume: 1A
Publisher: ASM International
Published: 31 August 2017
DOI: 10.31399/asm.hb.v01a.a0006340
EISBN: 978-1-62708-179-5
... in the ability to initiate and maintain nuclei during the several hours of solidification associated with large castings. Ideally, a series of inoculation steps, from the melt shop to the pouring step, should be carried out. Preinoculation during tapping, by in-stream inoculation between the furnace and ladle...
Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005344
EISBN: 978-1-62708-187-0
... casting. Entrapment of iron oxide and Mg-Ce-Al-Si inoculant at the origin resulted in the failure of the casting. Fig. 8 (a) Entrapment of iron oxide and Mg-Ce-Al-Si inoculant at the origin of a fractured ductile iron casting showing the origin. Original magnification: 7.5×. (b) Higher...
Book Chapter

Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0009017
EISBN: 978-1-62708-187-0
... refractories) and those that may be generated inside the system. Methods can be incorporated into the gating system to trap such particles (for example, filters) or to allow them time to float out of the metal stream before entering the mold cavity. Promoting Favorable Thermal Gradients Because the last...
Book Chapter

Series: ASM Handbook
Volume: 1A
Publisher: ASM International
Published: 31 August 2017
DOI: 10.31399/asm.hb.v01a.a0006338
EISBN: 978-1-62708-179-5
...; barely perceptible to the naked eye Macro- or micro-shrinkage, shrinkage porosity, leakers C 300: Discontinuities caused by lack of fusioin (cold shuts); edges generally rounded, indicating poor contact between various metal streams during filling of the mold C 310: Lack of complete...
Series: ASM Handbook
Volume: 1A
Publisher: ASM International
Published: 31 August 2017
DOI: 10.31399/asm.hb.v01a.a0006327
EISBN: 978-1-62708-179-5
... treatment involving in-stream post-inoculation after magnesium treatment is recommended ( Ref 24 ). In the case of an in-mold process, it has been demonstrated that residual magnesium could be controlled accurately within narrow limits ( Ref 16 ), thus ensuring stable production with a high yield...
Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005328
EISBN: 978-1-62708-187-0
... often performed when tapping the furnace. Stream inoculation, where feasible, is also recommended for improved machinability. Carbon content for the type D-5S alloy must be monitored carefully, because section sensitivity is high. Although the ASTM specification allows up to 2.4% C, sections over 25...
Series: ASM Handbook
Volume: 4C
Publisher: ASM International
Published: 09 June 2014
DOI: 10.31399/asm.hb.v04c.a0005904
EISBN: 978-1-62708-167-2
... “Oxygen Content of the Melt and Carbon/Silicon Isotherms” and “Inoculation and Nucleation” in the article “Metallurgy of Induction Melting Processes for Iron and Noniron Materials” in this Volume, must be remembered. Yet in the majority of cases, the metallurgical demands on the superheating temperature...
Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005257
EISBN: 978-1-62708-187-0
... diameter. Still others may use fluxes to purify the molten metal during pouring and solidification. All of these would require some means to deliver the inoculants or fluxes into the metal stream during pouring or into the mold cavity before or during solidification. Casting Extraction Castings need...