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batch-type furnaces

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Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2006
DOI: 10.31399/asm.tb.pht2.t51440055
EISBN: 978-1-62708-262-4
..., and disadvantages of furnaces classified based on the heat transfer medium employed. The types of furnaces covered are batch-type, continuous-type, liquid bath, fluidized bed, and vacuum. The subsequent sections provide information on furnace parts, fixtures, quenching mediums, and quenching systems. The final...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2006
DOI: 10.31399/asm.tb.pht2.t51440141
EISBN: 978-1-62708-262-4
... and for that reason, cyanide-type processes have declined in usage over the past couple of decades. Pack carburizing is usually done in box batch-type furnaces. No prepared atmosphere is required. Typical furnaces used for this process are discussed in Chapter 4 . Parts to be processed are placed in steel...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 2008
DOI: 10.31399/asm.tb.emea.t52240395
EISBN: 978-1-62708-251-8
.... In a batch-type furnace, the work load is charged and discharged as a single unit or batch. In a continuous furnace, the work enters and leaves the furnace in a continuous stream. Continuous furnaces are favored for the highvolume production of similar parts with total case depth requirements of less than...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2011
DOI: 10.31399/asm.tb.mnm2.t53060197
EISBN: 978-1-62708-261-7
... energy to heat) and by two broad categories: batch and continuous. Fuel fired (combustion type) furnaces are most widely used, but electrically heated furnaces are used where they offer advantages that cannot always be measured in terms of fuel cost. Various types of batch and continuous furnaces...
Series: ASM Technical Books
Publisher: ASM International
Published: 31 December 2020
DOI: 10.31399/asm.tb.phtbp.t59310127
EISBN: 978-1-62708-326-3
... for annealing instrument components to a large car-bottom furnace used for annealing several hundred tons of castings or forgings at one time. Castings and forgings are commonly annealed in batch-type box furnaces or car-bottom furnaces. Continuous furnaces with zone temperature control are used in many...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2006
DOI: 10.31399/asm.tb.pht2.t51440243
EISBN: 978-1-62708-262-4
... load, the proposed solution cannot be tested without committing yet another load. Statistical quality control can be very helpful in batch or short run type (setup dominated) processes by using it to analyze setup variables. If the process is then set up to optimal setup parameters (as determined...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2013
DOI: 10.31399/asm.tb.mfub.t53740271
EISBN: 978-1-62708-308-9
..., there are no phase changes and the ferrite and cementite constituents remain the same throughout the process. Process annealing is carried out in either batch-type or continuous furnaces. The hardenability of carbon steel can increase by as much as 50% with an increase in ASTM International austenite grain...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2006
DOI: 10.31399/asm.tb.pht2.t51440085
EISBN: 978-1-62708-262-4
... instruments. Programmable logic controllers are often used to retrofit and update older heat treating equipment. One of several PLCs available for the control of all functions, temperatures, time cycles, and atmosphere constituents and their control for an atmosphere batch furnace is shown in Fig. 8...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2018
DOI: 10.31399/asm.tb.aceg.t68410215
EISBN: 978-1-62708-280-8
... furnace pressure ramps Solutionizing furnaces are classified as either batch or continuous types, depending on the volume of production. Drop-bottom furnaces are suitable for batch operation with a varied product mix. Continuous furnaces are suitable for specific products of large...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2015
DOI: 10.31399/asm.tb.piht2.t55050155
EISBN: 978-1-62708-311-9
... verified that 20 min in a continuous furnace produces the desired hardness. Second, batch furnaces may have the times at heat increased because of the load density. The mass or weight of the load affects time for the load to uniformly heat to tempering temperature. Typical batch loads run at heat from 1...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2006
DOI: 10.31399/asm.tb.pht2.t51440207
EISBN: 978-1-62708-262-4
... sections, rate of heating is not especially critical. When a batch-type furnace is employed, it is of the utmost importance that furnace temperature not exceed 95 °C (200 °F) at the time of loading. After the furnace is loaded, the heating rate may be fairly rapid. For example, it is common practice...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2013
DOI: 10.31399/asm.tb.mfub.t53740001
EISBN: 978-1-62708-308-9
... levels, depending on the type of melting practice used. While many of these steels were originally air melted, the trend has been to move to more advanced melting techniques such as vacuum degassing, electroslag remelting (ESR), vacuum arc remelting (VAR), and double vacuum melting (vacuum induction...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 2008
DOI: 10.31399/asm.tb.emea.t52240349
EISBN: 978-1-62708-251-8
... could be produced. Both of these processes are now obsolete, and the BOF has largely replaced both of these older processes. Semifinished blooms, billets, and slabs are transported from the steelmaking plant to the rolling mills. Steel products are classified into two basic types...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2002
DOI: 10.31399/asm.tb.stg2.t61280135
EISBN: 978-1-62708-267-9
... treatment is a batch process. Batch heating for annealing or solution treating may be done in box furnaces for nonprecipitation-hardened superalloys. Box furnaces may have provisions for purging, preheating, and quenching, if the high-temperature compartment is supplemented by other chambers. Some...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2011
DOI: 10.31399/asm.tb.jub.t53290165
EISBN: 978-1-62708-306-5
..., the processes involved in precleaning and surface preparation, types of fluxes used, solder joint design, and solder heating methods. alloying elements brazing filler metals brazing solder joints soldering fluxes soldering surface preparation BRAZING AND SOLDERING processes use a molten filler...
Series: ASM Technical Books
Publisher: ASM International
Published: 30 April 2020
DOI: 10.31399/asm.tb.bpapp.t59290169
EISBN: 978-1-62708-319-5
... small batch furnaces to continuous furnaces for large-scale production. The process atmosphere depends on the material, ranging from air for oxide ceramics to vacuum for reactive metals. Measurement of the progress in sintering includes changes in dimensions, density, and properties. Hot isostatic...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2015
DOI: 10.31399/asm.tb.piht2.9781627083119
EISBN: 978-1-62708-311-9
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.tb.scm.t52870031
EISBN: 978-1-62708-314-0
.... From the batch house, another pneumatic conveyor sends the mixture to a high-temperature, approximately equals 2550 °F (1400 °C), natural gas–fired furnace for melting. The furnace is typically divided into three sections with channels that aid glass flow. The first section receives the batch, where...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2000
DOI: 10.31399/asm.tb.aet.t68260119
EISBN: 978-1-62708-336-2
... through the furnace by means of a walking beam system. In continuous type homogenizing, every billet receives exactly the same temperature and time for the heat treatment. With a batch furnace, however, some dispersion in the heating and holding time is unavoidable between the hot side and the cool side...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2006
DOI: 10.31399/asm.tb.ex2.t69980323
EISBN: 978-1-62708-342-3
... that the internal press piercing system is not required [ Ste 91 ]. Today, billets are usually heated to the desired operating temperature in main frequency induction or rapid-heating gas-fired furnaces. These two furnace types are used because they are best suited to meet the requirements...