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Series: ASM Handbook
Volume: 14B
Publisher: ASM International
Published: 01 January 2006
DOI: 10.31399/asm.hb.v14b.9781627081863
EISBN: 978-1-62708-186-3
Book Chapter
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003177
EISBN: 978-1-62708-199-3
... information on the various drive systems and the auxiliary equipment. It describes the selection of die materials and lubricants for sheet metal forming and provides information on the lubrication mechanisms and selection with a list of lubricant types for forming of specific sheet materials of ferrous or...
Abstract
This article describes the presses that are mechanically or hydraulically powered and used for producing sheet, strip, and plate from sheet metal. It also presents the JIC standards for presses, compares the presses based on power source, details the selection criteria and provides information on the various drive systems and the auxiliary equipment. It describes the selection of die materials and lubricants for sheet metal forming and provides information on the lubrication mechanisms and selection with a list of lubricant types for forming of specific sheet materials of ferrous or nonferrous metals. The article reviews the various types of forming processes such as blanking, piercing, fine-edge blanking, press bending, press forming, forming by multiple-slide machines, deep drawing, stretch forming, spinning, rubber-pad forming, three-roll forming, contour roll forming, drop hammer forming, explosive forming, electromagnetic forming, and superplastic forming.
Book Chapter
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 November 1995
DOI: 10.31399/asm.hb.emde.a0003035
EISBN: 978-1-62708-200-6
... Abstract Sheet molding compound (SMC) is a composite material - consisting of glass-fiber-reinforced polyester in a resin matrix - that’s available in sheet form for the production of compression-molded parts. This article discusses the components incorporated into the resin paste, including...
Abstract
Sheet molding compound (SMC) is a composite material - consisting of glass-fiber-reinforced polyester in a resin matrix - that’s available in sheet form for the production of compression-molded parts. This article discusses the components incorporated into the resin paste, including catalysts, fillers, thickeners, pigments, thermoplastic polymers, flame retardants, and ultraviolet absorbers, and how to optimize them to achieve the desired processing and molding characteristics and the necessary properties in the resulting parts. The article also presents several mixing techniques, including batch, batch/continuous, and continuous mixing, and describes the operations of continuous-belt and beltless machine type SMCs.
Book Chapter
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003094
EISBN: 978-1-62708-199-3
... applications that require the mechanical properties normally obtained by heat treatment. Steel sheet is coated in coil form before fabrication either by the steel mills or by specialists called coil coaters. Porcelain enamels are glass coatings applied primarily to products or parts made of sheet steel, cast...
Abstract
Low-carbon steel sheet and strip are used primarily in consumer goods. This article discusses quality descriptors and mechanical properties of low-carbon steel sheet and strip and carbon and low-alloy steel plate. Alloy steel sheet and strip are used primarily for those special applications that require the mechanical properties normally obtained by heat treatment. Steel sheet is coated in coil form before fabrication either by the steel mills or by specialists called coil coaters. Porcelain enamels are glass coatings applied primarily to products or parts made of sheet steel, cast iron, or aluminum to improve appearance and to protect the metal surface.
Book Chapter
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 November 1995
DOI: 10.31399/asm.hb.emde.a0003018
EISBN: 978-1-62708-200-6
... Abstract Thermoforming is a manufacturing process in which thermoplastic sheets are heated, softened, clamped onto a mold, and made to conform to the shape of the mold or forming tool. It is ideally suited to large-volume runs of small items. This article focuses on major phases of...
Abstract
Thermoforming is a manufacturing process in which thermoplastic sheets are heated, softened, clamped onto a mold, and made to conform to the shape of the mold or forming tool. It is ideally suited to large-volume runs of small items. This article focuses on major phases of thermoforming, namely, sheet transportation, heating, forming/cooling, and trimming, and different thermoforming techniques: basic female forming; basic male forming; matched-mold thermoforming; plug-assist thermoforming; pressure bubble plug-assist vacuum thermoforming; vacuum snapback thermoforming; air-slip thermoforming; and trapped-sheet, contact heat, and pressure thermoforming. It concludes with a discussion on machines and the economic concerns of thermoforming.
Book Chapter
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003179
EISBN: 978-1-62708-199-3
... Abstract This article discusses the operating principles, types, and applications of shearing and slitting of different forms of steel, including plates, flat sheets, bars, coiled sheet and strips. In addition, it provides a detailed account of the cutting methods such as oxyfuel gas cutting...
Abstract
This article discusses the operating principles, types, and applications of shearing and slitting of different forms of steel, including plates, flat sheets, bars, coiled sheet and strips. In addition, it provides a detailed account of the cutting methods such as oxyfuel gas cutting, plasma arc cutting, oxygen arc cutting, laser beam cutting, and air carbon arc cutting and gouging, describing their process capabilities, equipment used, operating principles and parameters, and factors affecting their efficiency.
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003141
EISBN: 978-1-62708-199-3
..., including all operations that convert ingot into general mill products, such as billet, bar, plate, sheet, strip, tube, and wire. The section on secondary fabrication describes processes such as die forging, extrusion, hot and cold forming, machining, chemical milling, and joining. The article presents a...
Abstract
Titanium metal passes through three major steps during processing from ore to finished product: reduction of titanium ore to sponge (porous form), melting of sponge and scrap to form ingot, and remelting and casting into finished shape. This article describes primary fabrication, including all operations that convert ingot into general mill products, such as billet, bar, plate, sheet, strip, tube, and wire. The section on secondary fabrication describes processes such as die forging, extrusion, hot and cold forming, machining, chemical milling, and joining. The article presents a short note on powder metallurgy products of titanium. Casting processes and properties are covered in the final section.
Series: ASM Handbook
Volume: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.a0004028
EISBN: 978-1-62708-185-6
... complex forming operations, through the use of the finite element method, are also presented. axial deformation body centered-cubic sheets deformation texture finite element method forming plastic deformation rolled face-centered-cubic zirconium METALS are polycrystalline aggregates, that...
Abstract
This article outlines several polycrystal formulations commonly applied for the simulation of plastic deformation and the prediction of deformation texture. It discusses the crystals of cubic and hexagonal symmetry that constitute the majority of the metallic aggregates used in technological applications. The article defines the basic kinematic tensors, reports their relations, and presents expressions for calculating the change in crystallographic orientation associated with plastic deformation. It surveys some of the polycrystal models in terms of the relative strength of the homogeneous effective medium (HEM). The article analyzes the anisotropy predictions of rolled face-centered-cubic and body centered-cubic sheets and presents simulations of the axial deformation of hexagonal-close-packed zirconium. The applications of polycrystal constitutive models to the simulation of complex forming operations, through the use of the finite element method, are also presented.
Book Chapter
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 November 1995
DOI: 10.31399/asm.hb.emde.a0003037
EISBN: 978-1-62708-200-6
... Abstract Honeycomb is a product consisting of very thin sheets attached to form connecting cells. This article briefly explains the construction, core characteristics, properties, and testing methods of the honeycomb structures. It discusses the special processes used to custom fit the shape of...
Abstract
Honeycomb is a product consisting of very thin sheets attached to form connecting cells. This article briefly explains the construction, core characteristics, properties, and testing methods of the honeycomb structures. It discusses the special processes used to custom fit the shape of core to fit customer’s specific needs. The article provides information on sandwich structures, including material selection, design guidelines, and structural efficiency.
Book Chapter
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 November 1995
DOI: 10.31399/asm.hb.emde.a0003015
EISBN: 978-1-62708-200-6
... exact temperature to give the proper finish. If the roll temperature is too high, the cooling sheet will stick to the roll. If the temperature is too low, it will not impart a proper finish. Once the extrudate leaves the die, it can be reshaped by forming devices in the cooling tank, the most common...
Abstract
This article describes the extrusion process, which converts soft, plastic material into a particular form using an extruder, or screw conveyer. It discusses the two main types of plastic extruders, twin-screw and single-screw, estimation of extruder capacity, and design and operations (heating, cooling, downstream sizing, corrugating, and crossheading) of the screw, the most important component of any extruder. It discusses the shapes produced by screw extrusion and the types of extrusion products produced by extrusion processes, including blown-film extrusion, flat-film or sheet extrusion, chill-roll film extrusion, pipe or tube extrusion, wire and cable coverings, extrusion coating, and profile extrusion, and provides some discussion on multiple-screw extruders. The article describes the dimensional accuracy of extrusion products, and lists common defects that occur frequently in the extrusion process.
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003100
EISBN: 978-1-62708-199-3
... Abstract This article describes the types of steels, including high-strength structural carbon steels and high-strength low-alloy steels (HSLA), available in all standard wrought forms such as sheet, strip, plate, structural shapes, bars, bar-size shapes. It discusses the special sections that...
Abstract
This article describes the types of steels, including high-strength structural carbon steels and high-strength low-alloy steels (HSLA), available in all standard wrought forms such as sheet, strip, plate, structural shapes, bars, bar-size shapes. It discusses the special sections that are characterized by higher yield strengths than those of plain carbon structural steels. The article tabulates the typical chemical compositions, tensile properties, heat treatment, product sizes, plate thickness and intended uses of high-strength steels. Further, it presents a short note on heat treated structural low-alloy grades.
Book Chapter
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003180
EISBN: 978-1-62708-199-3
... than 0.30%. More than 0.60% Si causes cracking of cold-drawn alloys and may cause weld cracking in others. Silicon at levels of less than 0.30% usually does not contribute to difficulties in forming. Cold forming is preferred for heat-resistant alloys, especially in thin sheets. Most of these...
Abstract
Characteristics of stainless steel that affect its formability include yield strength, tensile strength, and ductility, in addition to the effect of work hardening on these properties. This article discusses the forming process of stainless steel, heat-resistant alloys and refractory metals, detailing the major aspects of forming, including formability, lubrication, and forming methods and tools. The effect of factors such as alloy condition, cold reduction, forming direction (in the case of heat-resistant alloys) and temperature (in the case of refractory metals) on formability is also discussed.
Book: Surface Engineering
Series: ASM Handbook
Volume: 5
Publisher: ASM International
Published: 01 January 1994
DOI: 10.31399/asm.hb.v05.a0001270
EISBN: 978-1-62708-170-2
... coating thickness for galvanneal is 7 μm (0.275 mil) with a coating mass of 50 g/m 2 (0.16 oz/ft 2 ). In galvannealing, galvanized sheet is heated in-line just after coating and wiping in order to allow interdiffusion of iron from the substrate with zinc from the coating to form an iron-zinc alloy...
Abstract
This article discusses the processes involved in continuous hotdip coating of steel sheets, namely, hot and cold line processing, surface preparation, and post treatment. It outlines the properties and microstructures of metals and their alloys used in this process. The coatings considered in this article include metal coatings, such as zinc coatings, and alloy coatings, such as zinc-iron, types 1 and 2 aluminum, Zn-5AI, Zn-55AI, and lead-tin coatings.
Book Chapter
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 November 1995
DOI: 10.31399/asm.hb.emde.a0003019
EISBN: 978-1-62708-200-6
... because of their faster cure time and lower cost. Many SMC materials use a high-reactivity, isophthalic polyester resin (for example, E980) with magnesium oxide for thickening. Ground limestone is generally used if a filler is required. To form a sheet of SMC material, fibers and resin are distributed...
Abstract
The compression molding process is most commonly called the sheet molding compound (SMC) process in reference to the precursor sheet molding compound material it uses. This article discusses the types of materials used for sheet manufacture, and describes the manufacturing and processing parameters of SMC components, providing details on tooling and process advantages and limitations. The article provides a general overview of the types of compression molding processes, including structural compression molding and thermoplastic compression molding.
Series: ASM Handbook
Volume: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.a0003971
EISBN: 978-1-62708-185-6
... Volume presents the state-of-the-art in bulk-metalworking processes. A companion volume ( ASM Handbook , Volume 14B, Metalworking: Sheet Forming ) describes the state-of-the-art in sheet-forming processes. Various major sections of this Volume deal with descriptions of specific processes, selection of...
Abstract
Metalworking is one of the three major technologies used to fabricate metal products. This article tabulates the classification of metal forming processes. It discusses different types of metalworking equipment, including rolling mills, ring-rolling machines, and thread-rolling and surface-rolling machines. The article outlines the significant characteristics of pressing-type machines: load and energy characteristics, time-related characteristics, and accuracy characteristics. It summarizes different specialized processes such as advanced roll-forming methods, equal-channel angular extrusion, incremental forging, and microforming. The article describes the thermomechanical processing of nickel- and titanium-base alloys and concludes with information on the advancements in process simulation.
Book Chapter
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003125
EISBN: 978-1-62708-199-3
.... aluminum mill products aluminum wrought products design temper designation tolerances COMMERCIAL WROUGHT ALUMINUM PRODUCTS can be divided into two groups. Standardized wrought products include sheet, plate, foil, rod, bar, wire, tube, pipe, and structural forms. Engineered wrought products are...
Abstract
This article discusses the classification, characteristics and temper designations of wrought aluminum alloys. Wrought aluminum products are available as flat-rolled products such as sheets, plates, and foils; rods, bars, and wires; tubular products such as tubes and pipes; extruded shapes; forgings; and impacts. The article provides information on product economics, design and selection, including product dimension and dimension tolerances, and design and use of wrought product capabilities. Finally, it tabulates the specifications and standards for aluminum mill products.
Series: ASM Handbook
Volume: 22B
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.hb.v22b.9781627081979
EISBN: 978-1-62708-197-9
Book: Corrosion: Materials
Series: ASM Handbook
Volume: 13B
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v13b.a0003804
EISBN: 978-1-62708-183-2
... agriculture. These products include bars, rods, wires, hot and cold rolled sheets, strip plates, tin mill products, steel tubes, castings, and forgings. The article also provides information on the methods used to prevent or control the rusting of ferrous materials, namely, alloying, coating, and covering...
Abstract
Ferrous metals are metals that contain primarily iron and may have small amounts of other elements added to give the desired properties. This article discuses the characteristics of steel products used in most industries, including construction, automotive, energy, shipping, and agriculture. These products include bars, rods, wires, hot and cold rolled sheets, strip plates, tin mill products, steel tubes, castings, and forgings. The article also provides information on the methods used to prevent or control the rusting of ferrous materials, namely, alloying, coating, and covering.
Series: ASM Handbook
Volume: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.a0004010
EISBN: 978-1-62708-185-6
... generally denotes cold forming of plate, sheet, bars, beams, pipe, or angular cross section lengths into selected shapes by passing the metal workpiece between three correctly spaced rolls ( Ref 1 , 5 ). The roll forming process employs pairs of small opposed rollers to shape a cylindrical workpiece into a...
Abstract
This article describes the roll forming of components of nickel, titanium, and aluminum alloys. The metallurgical characteristics of the roll formed components, such as macrostructures, microstructures, tensile strength, and stress rupture performance, are discussed. The article compares the resulting properties of roll formed and conventionally forged components.
Book Chapter
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003181
EISBN: 978-1-62708-199-3
... the lower tensile and yield strengths of aluminum alloys, and from their comparatively slow rate of work hardening. The compositions and tempers of aluminum alloys also affect their formability. BERYLLIUM has been successfully formed by most common sheet metal forming...
Abstract
This article provides a detailed account on forming operations (blanking, piercing, press-brake forming, contour rolling, deep drawing, cold forming, and hot forming) of various nonferrous metals, including aluminum alloys, beryllium, copper and its alloys, magnesium alloys, nickel alloys, titanium alloys, and platinum metals. It discusses the formability, equipment and tooling, and lubricants used in the forming operations of these nonferrous metals.