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gas-blast method

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Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003173
EISBN: 978-1-62708-199-3
... remove dissolved hydrogen that, if not removed, forms porosity in aluminum castings. The most efficient degassing method is to introduce chlorine gas, which reacts with the hydrogen to form HCl. However, because of safety concerns with chlorine, this method is little used. Instead, rotary degassing is...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003172
EISBN: 978-1-62708-199-3
... instead of discarding it. Three primary methods are used: pneumatic, mechanical, and thermal. In pneumatic methods, the sand is blasted in a high-pressure air stream against a steel or refractory plate. The impact of the sand on the plate causes the resin or silicate coating on the sand to physically...
Book Chapter

Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003214
EISBN: 978-1-62708-199-3
... Abstract Finishing refers to a wide variety of processes that generally involve material removal in one form or another to generate surfaces with specific geometries, tolerances, and functional or decorative characteristics. This article discusses four major finishing methods, namely, abrasive...
Series: ASM Handbook
Volume: 17
Publisher: ASM International
Published: 01 August 2018
DOI: 10.31399/asm.hb.v17.a0006449
EISBN: 978-1-62708-190-0
... a broad range of applications in the medical, automotive, aerospace, structural, refrigeration, energy, mechanical, sporting goods, furniture, and oil and gas industries, among others. Products are classified based on use and method of manufacture. Two tubular product forms are welded and seamless...
Series: ASM Handbook
Volume: 5
Publisher: ASM International
Published: 01 January 1994
DOI: 10.31399/asm.hb.v05.a0001238
EISBN: 978-1-62708-170-2
... ). The wear mechanisms involved were found to be strongly dependent on the surface finishing method used (milling, grinding, ion nitriding, or blasting) as well as the microstructure of the steel. Interestingly, this study also clearly demonstrated the advantage of computer-controlled finishing machines...
Series: ASM Handbook
Volume: 5B
Publisher: ASM International
Published: 30 September 2015
DOI: 10.31399/asm.hb.v05b.a0006027
EISBN: 978-1-62708-172-6
... Galvanizing is applied by either of two methods: batch galvanizing or continuous galvanizing. Batch galvanizing involves cleaning of the steel to be protected, applying a flux to the surface of the zinc bath, and immersing the steel item through the flux into the molten bath of zinc for various periods of...
Series: ASM Handbook
Volume: 5
Publisher: ASM International
Published: 01 January 1994
DOI: 10.31399/asm.hb.v05.a0001269
EISBN: 978-1-62708-170-2
... used successfully in certain applications. These methods include mechanical alteration of the surface of a material, such as shot/grit blasting or abrasive/wire brushing, in order to remove particles before the surface is coated. Grit blasting can include sand, glass, and steel grit or shot. Brushes...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003197
EISBN: 978-1-62708-199-3
..., carbon and hardness gradients, and process procedures of different types of case hardening methods: carburizing (gas, pack, liquid, vacuum, and plasma), nitriding (gas, liquid, plasma), carbonitriding, cyaniding and ferritic nitrocarburizing. An accurate and repeatable method of measuring case depth is...
Series: ASM Handbook
Volume: 5
Publisher: ASM International
Published: 01 January 1994
DOI: 10.31399/asm.hb.v05.a0001304
EISBN: 978-1-62708-170-2
... removal of all classes of these soils. The seven basic methods used for removing rust and scale from ferrous mill products, forgings, castings and fabricated steel parts are: Abrasive blasting (dry or wet) Tumbling (dry or wet) Brushing Acid pickling Salt bath descaling Alkaline...
Series: ASM Handbook
Volume: 5
Publisher: ASM International
Published: 01 January 1994
DOI: 10.31399/asm.hb.v05.a0001232
EISBN: 978-1-62708-170-2
... through a nozzle at inlet pressures ranging from 170 to 860 kPa (25 to 125 psi) in a gas (nitrogen or air) medium. Outlet velocities are generally supersonic, and the volume of material removed varies as particle velocity is raised to a power between 2 and 3. Sand blasting and deburring are the two most...
Series: ASM Handbook
Volume: 5
Publisher: ASM International
Published: 01 January 1994
DOI: 10.31399/asm.hb.v05.a0001310
EISBN: 978-1-62708-170-2
.... This article focuses on mechanical finishing methods, namely, barrel tumbling, polishing, buffing, vibratory finishing, fiber brushing, and shot blasting. It provides useful information on process control and difficulties with chemical and anodic treatments of magnesium alloys. The use and applications...
Series: ASM Handbook
Volume: 5
Publisher: ASM International
Published: 01 January 1994
DOI: 10.31399/asm.hb.v05.a0001277
EISBN: 978-1-62708-170-2
... information is available in the article “Classification and Selection of Cleaning Processes” and in the other articles in the Section “Surface Cleaning” in this Volume. Mechanical cleaning methods include power brushing, grinding, and abrasive blasting. Power brushing is an abrasive cleaning...
Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005255
EISBN: 978-1-62708-187-0
... (potentially) gas plating ( Ref 40 ). It also includes the casting of such nonmetallic materials as plaster (usually used to back up a spray metal facing), plastics ( Ref 41 ), and rubber ( Ref 42 ), as well as the vulcanizing of solid rubber under pressure ( Ref 43 ). All these methods begin with a positive...
Series: ASM Handbook
Volume: 5
Publisher: ASM International
Published: 01 January 1994
DOI: 10.31399/asm.hb.v05.a0001273
EISBN: 978-1-62708-170-2
... prior to hot dip tinning. Iron castings to be tinned by the direct chloride method or by wiping should be blasted with fine (70-mesh) angular chilled iron grit. Blasting should be thorough with all surfaces to be tinned treated for 30 to 60 s. For a description of the equipment and techniques used in...
Series: ASM Handbook
Volume: 5
Publisher: ASM International
Published: 01 January 1994
DOI: 10.31399/asm.hb.v05.a0001279
EISBN: 978-1-62708-170-2
... steels have excellent resistance to warpage. They also exhibit good resistance to defects such as “fishscale” and ground-coat reboiling during firing of the cover coat, both of which are caused by the evolution of hydrogen gas. If overpickled using the acid etch/nickel deposition metal preparation method...
Book Chapter

Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003210
EISBN: 978-1-62708-199-3
... atmospheres; and (4) vacuum type. The batch- and continuous-type furnaces are used most frequently for brazing of carbon and low-alloy steel assemblies. The method of heating varies with the application. Some furnaces are heated by gas or oil, but most are heated by electrical resistance. The gas...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 November 1995
DOI: 10.31399/asm.hb.emde.a0003054
EISBN: 978-1-62708-200-6
... resistance, and other properties. This article discusses the fundamentals of sintering and its effects on pore structures and particle density. It addresses some of the more common sintering methods, including solid-state, liquid-phase, and gas pressure sintering, and presents alternative processes such as...
Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005242
EISBN: 978-1-62708-187-0
... Abstract This article reviews the basic types of mold aggregates and bonding methods for expendable molds and coremaking. It provides an overview of mold media and the basic types of sands and their properties. The most significant clays used in green sand operations, such as bentonites, are...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 November 1995
DOI: 10.31399/asm.hb.emde.a0003052
EISBN: 978-1-62708-200-6
... a description of the comminution process (wet and dry milling methods), it discusses batching and mixing operations and granulation methods. The article also deals with the effect of process variables and the steps involved in chemical synthesis, including preparation from solution and gas-phase...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003217
EISBN: 978-1-62708-199-3
... continuous electrodeposition for steel strip and babbitting and discusses phosphate and chromate conversion coatings as well. It also addresses painting, discussing types and selection, surface preparation, and application methods. In addition, the article describes rust-preventive compounds and their...