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Foundry practice

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Published: 01 December 2015
Fig. 15 Corrosion of aluminum anodes. (a) Uneven corrosion of aluminum anode, the result in part of improper foundry practice leading to segregation of alloying elements. (b) Uniform corrosion of aluminum anode as the result of proper foundry practice. Courtesy of Jack Smart, John S. Smart More
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 1995
DOI: 10.31399/asm.tb.sch6.t68200115
EISBN: 978-1-62708-354-6
... to solidify, thus ensuring soundness of the casting. Directional solidification occurs only when a deliberate temperature gradient has been established to ensure soundness. The temperature gradient is created both by the design of the part and by foundry practice. Sometimes the design will produce...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 1995
DOI: 10.31399/asm.tb.sch6.t68200295
EISBN: 978-1-62708-354-6
... and stainless steels. The castability and ultimate corrosion performance of nickel-base castings is greatly influenced by foundry practices. The practices needed to make nickel-base castings can be very different from steel or even stainless steel. A potential supplier’s experience and technical capabilities...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 1995
DOI: 10.31399/asm.tb.sch6.t68200140
EISBN: 978-1-62708-354-6
... of dimensions, such as bore size, length, or wall thickness. This practice should be avoided even though supplying individual drawings increases drafting time. Machining and Tooling References Good drafting practice employs the use of datum planes and target points (also called tooling points). Figure 9...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 1995
DOI: 10.31399/asm.tb.sch6.t68200065
EISBN: 978-1-62708-354-6
... that the personnel from the foundry and the customer who are responsible for acceptance or rejection of the castings be formally trained, tested, and certified in the inspection method of choice. The American Society for Nondestructive Testing recommended practice SNT-TC-1A ( Table 4-2 ) and the similar MIL-STD-410...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.tb.ssde.t52310147
EISBN: 978-1-62708-286-0
... as cast. Since heavy cold work defeats the purpose of casting to achieve a near-net shape, stabilized ferritic stainless steels are seldom used as castings. Also, the standard stabilizing alloy, titanium, is too readily oxidized for normal foundry practice to avoid the loss of this essential element. Thus...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2001
DOI: 10.31399/asm.tb.aub.t61170107
EISBN: 978-1-62708-297-6
... applications. It is most desirable that the designer, metallurgist, and foundry worker cooperate to specify the composition, heat treatment, and foundry practice to develop the most suitable alloy and casting design for a specific application. The standard high-alloy white cast irons for abrasion-resistant...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 1995
DOI: 10.31399/asm.tb.sch6.t68200187
EISBN: 978-1-62708-354-6
... practice and acid practice. The following refractory types and classifications also apply to the refractories used in ladles. Acid Refractories “Acid” linings are typically silica or fire clay. They are low in cost and are suitable for use with many alloys where refining techniques...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2004
DOI: 10.31399/asm.tb.aacppa.t51140061
EISBN: 978-1-62708-335-5
...-temperature phases. The most complete degree of solution that can be practically and economically achieved is desirable for optimal properties. Different casting processes and foundry practices result in microstructural differences with relevance to heat treatment practice. Coarser microstructures...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2004
DOI: 10.31399/asm.tb.aacppa.t51140021
EISBN: 978-1-62708-335-5
.... Removal is by physical means including vibration. Casting quality is determined to a large extent by foundry technique. Proper molten metal processing, metal-handling and gating design and practices including the selective use of chills are necessary for obtaining sound castings. Complex castings...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 1995
DOI: 10.31399/asm.tb.sch6.t68200133
EISBN: 978-1-62708-354-6
... results in improved casting quality and cost. By following this practice a number of costly pitfalls can be avoided and delays that invariably appear when foundry engineering considerations are ignored can be eliminated. The contribution of the foundry engineer to traditional product design...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2004
DOI: 10.31399/asm.tb.aacppa.t51140047
EISBN: 978-1-62708-335-5
... to interdendritic feeding and are therefore less susceptible, under reasonable efforts to establish directional solidification, to the formation of widely distributed shrinkage voids. When good foundry practices are used in long solidification range compositions such as some aluminum-copper and aluminum...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2015
DOI: 10.31399/asm.tb.spsp2.t54410001
EISBN: 978-1-62708-265-5
... historically were brittle, a characteristic that differentiated them from steels with good combinations of strength and ductility. Again, the basis for this historical differentiation is challenged by modern technology: good foundry practice produces nodular and austempered ductile cast irons with good...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2001
DOI: 10.31399/asm.tb.aub.t61170091
EISBN: 978-1-62708-297-6
... in the article “Foundry Practice for Cast Irons” in the ASM Specialty Handbook: Cast Irons . For example, Fig. 3 shows some typical correlations between treatment method (level of minor elements), initial sulfur level, and graphite shape when producing CG irons. Nominal compositions of typical melt...
Series: ASM Technical Books
Publisher: ASM International
Published: 30 November 2023
DOI: 10.31399/asm.tb.ceeg.t59370001
EISBN: 978-1-62708-447-5
... formed in the casting process are separated at the degating and definning stations and conveyed back to the melting station for reuse. This description explains the basic elements of the process. There are several process steps and various machinery and controls that are used in actual practice...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 2008
DOI: 10.31399/asm.tb.emea.t52240453
EISBN: 978-1-62708-251-8
... than most steels, they are cheap, more readily cast than steels, and have other useful properties. With proper alloying, good foundry practice, and appropriate heat treatment, the properties of any cast iron can be varied over a wide range. Large tonnages of high-quality cast irons are produced...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 1995
DOI: 10.31399/asm.tb.sch6.t68200001
EISBN: 978-1-62708-354-6
... practice in the steel casting industry. Heat treatment processes may be used to enhance the properties of specific alloys. The scale formed on casting surfaces during heat treatment is removed by abrasive blasting. Steel castings can be straightened by pressing if warpage occurs during processing...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 1995
DOI: 10.31399/asm.tb.sch6.t68200220
EISBN: 978-1-62708-354-6
..., however, frequently alert the foundry of the need for corrective action before the product quality deviates from specification limits. Some deviations from the desired quality can be remedied by simple adjustment of the process, while others may require a more complex course of action, consisting...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 1995
DOI: 10.31399/asm.tb.sch6.t68200369
EISBN: 978-1-62708-354-6
... acceptable under ASTM A488 and the military standard MIL-STD-00248B (Ships). Therefore, it is common practice for a foundry to qualify according to the provisions of Section IX, rather than to A488 of ASTM. While Section IX was originally designed strictly for fabrication welding, the weld test plates...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 April 2013
DOI: 10.31399/asm.tb.imub.t53720293
EISBN: 978-1-62708-305-8
... determine the critical flaw size that will deleteriously affect performance in service. This permits the foundry to design a casting practice that will eliminate such discontinuities at minimum cost. Common Inspection Procedures The inspection of castings is most often limited to visual...