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Published: 01 January 2006
Book Chapter
Shearing, Slitting, and Cutting
Available to PurchaseSeries: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003179
EISBN: 978-1-62708-199-3
...). Fig. 9 Two types of blades for shearing of bars Oxyfuel Gas Cutting OXYFUEL GAS CUTTING (OFC) includes a group of cutting processes that use controlled chemical reactions to remove preheated metal by rapid oxidation in a stream of pure oxygen. A fuel gas/oxygen flame heats the workpiece...
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.
Book Chapter
Oxyfuel Gas Cutting
Available to PurchaseSeries: ASM Handbook
Volume: 6
Publisher: ASM International
Published: 01 January 1993
DOI: 10.31399/asm.hb.v06.a0001483
EISBN: 978-1-62708-173-3
... processes that use controlled chemical reactions to remove preheated metal by rapid oxidation in a stream of pure oxygen. A fuel gas/oxygen flame heats the workpiece to ignition temperature, and a stream of pure oxygen feeds the cutting (oxidizing) action. The OFC process, which is also referred...
Abstract
Oxyfuel gas cutting (OFC) includes a group of cutting processes that use controlled chemical reactions to remove preheated metal by rapid oxidation in a stream of pure oxygen. This article provides a detailed discussion on the principles of operation and the process capabilities of OFC. In addition to providing information on the equipment used, the article describes the properties of fuel gases (acetylene, natural gas). It also presents an overview of the effect of OFC on base metal and explains the application of OFC in cutting thin, medium, and thick sections, bars, and structural and close-tolerance shapes.
Book Chapter
Oxyfuel Gas Cutting
Available to PurchaseSeries: ASM Handbook
Volume: 14B
Publisher: ASM International
Published: 01 January 2006
DOI: 10.31399/asm.hb.v14b.a0005175
EISBN: 978-1-62708-186-3
... to remove preheated metal by rapid oxidation in a stream of pure oxygen. A fuel gas/oxygen flame heats the workpiece to ignition temperature, and a stream of pure oxygen feeds the cutting (oxidizing) action. The OFC process, which is also referred to as burning or flame cutting, can cut carbon and low-alloy...
Abstract
Oxyfuel gas cutting (OFC) includes a group of cutting processes that use controlled chemical reactions to remove preheated metal by rapid oxidation in a stream of pure oxygen. This article discusses the operation principles and process capabilities of the OFC. It reviews the properties and compositions of fuel types such as acetylene, natural gas, propane, propylene, and methyl-acetylene-propadiene-stabilized gas. The article describes the effects of OFC on base metal, including carbon and low-alloy steels, cast irons, and stainless steels. It provides information on light cutting, medium cutting, heavy cutting, and stack cutting. The article informs that the basic oxyfuel method can be modified to allow gas cutting of metals, such as stainless steel and most nonferrous alloys, that resist continuous oxidation.
Series: ASM Handbook
Volume: 4A
Publisher: ASM International
Published: 01 August 2013
DOI: 10.31399/asm.hb.v04a.a0005807
EISBN: 978-1-62708-165-8
... and a quenching means mounted on a movable carriage that runs on a track at a regulated speed (flame-cutting machines are adaptable to this type of flame hardening). Workpieces mounted on a turntable or in a lathe can be hardened readily by the progressive method; either the flame head or the workpiece may move...
Abstract
Flame hardening is a heat treating process in which a thin surface shell of a steel part is heated rapidly to a temperature above the critical temperatures of the steel. The versatility of flame-hardening equipment and the wide range of heating conditions obtainable with gas burners, often permit flame hardening to be done by a variety of methods. These include the spot or stationary method, progressive method, spinning method, and the combination progressive-spinning method. This article provides information on fuel gases used in flame hardening and their selection criteria for specific applications. It also discusses operating procedures and control requirements for flame hardening of steel.
Book Chapter
Preparation and Preservation of Fracture Specimens
Available to PurchaseBook: Fractography
Series: ASM Handbook Archive
Volume: 12
Publisher: ASM International
Published: 01 January 1987
DOI: 10.31399/asm.hb.v12.a0001832
EISBN: 978-1-62708-181-8
... method of specimen removal is flame cutting. Cutting must be done at a sufficient distance from the fracture so that the microstructure of the metal underlying the fracture surface is not altered by the heat of the flame and so that none of the molten metal from flame cutting is deposited on the fracture...
Abstract
Fracture surfaces are fragile and subject to mechanical and environmental damage that can destroy microstructural features. This article discusses the importance of care and handling of fractures and the factors that need to be considered during the preliminary visual examination. It describes the procedures for sectioning a fracture and opening secondary cracks as well as the effect of nondestructive inspection on subsequent evaluation. The article provides information on the most common techniques for cleaning fracture surfaces. These techniques are dry air blast cleaning, replica stripping, organic-solvent cleaning, water-base detergent cleaning, cathodic cleaning, and chemical-etch cleaning.
Book Chapter
Processing and Finishing of Castings
Available to PurchaseBook: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005355
EISBN: 978-1-62708-187-0
... inspection, pressure testing, radiographic inspection, magnetic particle inspection, and ultrasonic inspection. castings blast cleaning cleaning finishing flame cutting grinding radiographic inspection inspection liquid penetrant inspection magnetic particle inspection ultrasonic inspection...
Abstract
After solidification and cooling, further processing and finishing of the castings are required. This article describes the general operations of shakeout, grinding, cleaning, and inspection of castings, with particular emphasis on automation technology. It illustrates the vertical core knockout machine and the A-frame core knockout machine and lists the advantages and disadvantages of these machines. The article describes the general factors in automated or manual gate removal process. It concludes with discussion on the various types of inspection, such as the liquid penetrant inspection, pressure testing, radiographic inspection, magnetic particle inspection, and ultrasonic inspection.
Book Chapter
Metal and Alloy Powders for Welding, Hardfacing, Brazing, and Soldering
Available to PurchaseBook: Powder Metallurgy
Series: ASM Handbook
Volume: 7
Publisher: ASM International
Published: 30 September 2015
DOI: 10.31399/asm.hb.v07.a0006079
EISBN: 978-1-62708-175-7
... and the specific powder properties and characteristics they require. alloy powder brazing brazing paste additives filler metals flame cutting flux-cored wires hardface coatings hardfacing iron powder mechanical properties metal powder cutting metal powders powder characteristics soldering...
Abstract
Metals and alloy powders are used in welding, hardfacing, brazing, and soldering applications, which include hardface coatings, the manufacturing of welding stick electrodes and flux-cored wires, and additives in brazing pastes or creams. This article reviews these applications and the specific powder properties and characteristics they require.
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Schematic illustration of a typical oxyfuel gas flame used in welding and c...
Available to PurchasePublished: 31 October 2011
Fig. 3 Schematic illustration of a typical oxyfuel gas flame used in welding and cutting, here showing an oxyacetylene flame adjusted to be (a) neutral and (b) reducing. The primary and secondary regions of combustion are shown in (a), while the acetylene “feather” characteristic of a reducing
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Types of cutting tips. (a) Single-piece acetylene cutting tip. (b) Two-piec...
Available to PurchasePublished: 01 December 1998
Fig. 13 Types of cutting tips. (a) Single-piece acetylene cutting tip. (b) Two-piece tip for natural gas or LPG. Fuel gas and preheat oxygen mix in tip. Recessed bore promotes laminar flow of gas and anchors the flame when natural gas or propane is used.
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Book Chapter
Trepanning
Available to PurchaseBook: Machining
Series: ASM Handbook
Volume: 16
Publisher: ASM International
Published: 01 January 1989
DOI: 10.31399/asm.hb.v16.a0002131
EISBN: 978-1-62708-188-7
... is the production of round disks from flat stock. The process is particularly applicable when production quantities are too small to warrant the use of blanking dies and when flame-cutting equipment is unavailable. Hand-fed drill presses are the machines most used for this application of trepanning. When...
Abstract
Trepanning is used in at least four distinct production applications: round disks, large shallow through holes, circular grooves, and deep holes. This article provides an overview of the first three applications. It describes the machines, tools, techniques, and cutting fluids used for deep-hole trepanning. The article contains a table that lists speeds and feeds for the deep-hole trepanning of various steels with high-speed tool steels and carbide tools.
Book Chapter
General Design Considerations for Arc Welding Processes
Available to PurchaseSeries: ASM Handbook
Volume: 6A
Publisher: ASM International
Published: 31 October 2011
DOI: 10.31399/asm.hb.v06a.a0005558
EISBN: 978-1-62708-174-0
... include machining, chipping, shearing, grinding, flame (gas) cutting, gas gouging, and air carbon arc gouging. The choice of the most economical means depends on factors such as the type of material, section characteristics, quality required, and available equipment. Edge preparations are cut...
Abstract
This article provides information on the various types of welds and joints. It reviews the weld joint design considerations: the ability to transfer load and the cost. The article explains the throat size and weld size requirements of fillet welds, and presents a comparison of fillet and groove welds. It details the various design considerations for groove-weld selection, including the groove angle, root opening, and depth of the groove. The article also describes the methods of edge preparation and concludes with an illustration of the recommended proportions of grooves for arc welding.
Book Chapter
Cutting Operations
Available to PurchaseSeries: ASM Handbook
Volume: 14B
Publisher: ASM International
Published: 01 January 2006
DOI: 10.31399/asm.hb.v14b.a0005174
EISBN: 978-1-62708-186-3
... arc cutting processes. Various gas cutting processes have been known as flame cutting, burning, oxyfuel gas cutting, and oxygen cutting. The terms oxyfuel gas cutting and oxygen cutting may be more accurate than other terms. However, all the terms mentioned previously have been used. Moreover...
Abstract
This article focuses on the mechanical and nonmechanical cutting methods used in metal fabrication industries. The most prevalent equipment used for mechanical cutting includes shears, iron workers, nibblers, and band saws. Nonmechanical methods of cutting include gas cutting, electric arc cutting, and laser cutting. The article concludes with information on the advantages of abrasive waterjet cutting, which is an alternative to laser cutting, gas cutting, and plasma cutting.
Image
Proper and improper techniques for a heavy cut. (a) Minimum drag (typical a...
Available to PurchasePublished: 01 January 1993
Fig. 8 Proper and improper techniques for a heavy cut. (a) Minimum drag (typical at balanced conditions) permits flame to break through cutting face uniformly at all points. (b) Excessive drag, typically caused by insufficient oxygen or excessive speed, results in undercut. (c) Forward drag
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Image
Proper and improper techiques for completing a heavy cut. (a) Minimum drag ...
Available to PurchasePublished: 01 January 2006
Fig. 12 Proper and improper techiques for completing a heavy cut. (a) Minimum drag (typical at balanced conditions) permits flame to break through cutting face uniformly at all points. (b) Excessive drag, typically caused by insufficient oxygen or excessive speed, results in undercut. (c
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Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0001811
EISBN: 978-1-62708-180-1
... is a limiting factor, plain carbon steels may not be suitable. A high-strength low-alloy steel can be used instead, the grade and fabrication depending on the requirements of the specific application. Flame-cut parts and welded components, insofar as possible, should be stress relieved at 600 to 650 °C...
Abstract
This article focuses on the mechanisms and common causes of failure of metal components in lifting equipment in the following three categories: cranes and bridges, particularly those for outdoor and other low-temperature service; attachments used for direct lifting, such as hooks, chains, wire rope, slings, beams, bales, and trunnions; and built-in members such as shafts, gears, and drums.
Series: ASM Handbook
Volume: 6
Publisher: ASM International
Published: 01 January 1993
DOI: 10.31399/asm.hb.v06.a0001372
EISBN: 978-1-62708-173-3
... into oxygen cutting. The process can be adapted to short production runs, field work, repairs, and alterations. Metals That Can Be Oxyfuel Gas Welded Most ferrous and nonferrous metals can be oxyfuel gas welded. Oxyacetylene supplies the heat intensity and flame atmosphere necessary for welding carbon...
Abstract
Oxyfuel gas welding (OFW) is a manual process in which the metal surfaces to be joined are melted progressively by heat from a gas flame, with or without a filler metal. This article discusses the capabilities, advantages, and limitations of OFW. It describes the role of gases, such as oxygen, acetylene, hydrogen, natural gas, propane, and proprietary gases, in OFW. The article discusses the important elements of an OFW system, such as gas storage facilities, pressure regulators, hoses, torches, related safety devices, and accessories. It describes the sequence for setting up a positive-pressure welding outfit. The article provides information on forehand welding and backhand welding, as well as various joints used. It concludes with a discussion on repairs and alterations, as well as the safety aspects.
Book: Surface Engineering
Series: ASM Handbook
Volume: 5
Publisher: ASM International
Published: 01 January 1994
DOI: 10.31399/asm.hb.v05.a0001282
EISBN: 978-1-62708-170-2
... for thermal spray are widely used: rough threading, grit blasting, and a combination of rough threading followed by grit blasting. Rough threading is generally used for cylindrical surfaces and with thick flame sprayed coatings. The part to be prepared is mounted in a lathe and a single thread cut is taken...
Abstract
This article introduces thermal spray coatings and describes the various types of coating processes and coating devices, including the flame spray, electric-arc spray, plasma spray, transferred plasma arc, high-velocity oxyfuel, and detonation gun. It provides information on the surface preparation methods and finishing treatments of coated parts. The article also explains the tests to evaluate the coating quality and the effects of coating structures and mechanical properties on coated parts. It concludes with a discussion on the uses of thermal spray coatings.
Book Chapter
Safe Practices
Available to PurchaseSeries: ASM Handbook
Volume: 6
Publisher: ASM International
Published: 01 January 1993
DOI: 10.31399/asm.hb.v06.a0001487
EISBN: 978-1-62708-173-3
... to designate welding areas and to specify that eye protection must be worn. Protective Screens Persons in areas adjacent to welding and cutting must be protected from radiant energy and hot spatter by (1) flame-resistant screens or shields, or (2) suitable eye and face protection and protective clothing...
Abstract
Safety is an important consideration in all welding, cutting, and related work. This article discusses the basic elements of safety general to all welding, cutting, and related processes. It includes safety procedures common to a variety of applications. The most important component of an effective safety and health program is management support and direction. The article reviews the role of management, training, housekeeping, and public demonstrations in welding safety to minimize personal injury and property damage. It provides information on the safety measures for eye and face protection in various welding and cutting operations. Injuries and fatalities from electric shock in welding and cutting operations can occur if proper precautionary measures are not followed. The article discusses the electrical safety aspects to be considered for various welding and cutting operations.
Book Chapter
Failures of Cranes and Lifting Equipment
Available to PurchaseSeries: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006830
EISBN: 978-1-62708-329-4
.... A high-strength, low-alloy steel can be used instead, with the grade and fabrication depending on the requirements of the specific application. Flame-cut or laser-cut parts and welded components, insofar as possible, should be stress relieved at 600 to 650 °C (1110 to 1200 °F); cutting may produce...
Abstract
The types of metal components used in lifting equipment include gears, shafts, drums and sheaves, brakes, brake wheels, couplings, bearings, wheels, electrical switchgear, chains, wire rope, and hooks. This article primarily deals with many of these metal components of lifting equipment in three categories: cranes and bridges, attachments used for direct lifting, and built-in members of lifting equipment. It first reviews the mechanisms, origins, and investigation of failures. Then the article describes the materials used for lifting equipment, followed by a section explaining the failure analysis of wire ropes and the failure of wire ropes due to corrosion, a common cause of wire-rope failure. Further, it reviews the characteristics of shock loading, abrasive wear, and stress-corrosion cracking of a wire rope. Then, the article provides information on the failure analysis of chains, hooks, shafts, and cranes and related members.
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