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liquid quenching

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Published: 30 April 2024
Fig. 11.14 Stages of cooling during quenching in liquid media More
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2022
DOI: 10.31399/asm.tb.isceg.t59320157
EISBN: 978-1-62708-332-4
... and the alloying. Figure 8.3 is a summary of the heat-treat cycles and the resultant microstructures for unalloyed and alloyed irons: Unalloyed iron, air quench → Ferritic microstructure Unalloyed iron, liquid quench → Pearlitic microstructure Alloyed iron, air quench → Pearlitic microstructure...
Image
Published: 01 September 2008
Fig. 19 Fixture made from AISI O1 tool that cracked during oil quenching. The design is poor for liquid quenching. Source: Ref 16 More
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2000
DOI: 10.31399/asm.tb.htgpge.t67320171
EISBN: 978-1-62708-347-8
..., wear-resistant case. A carbonitrided case has better hardenability than a carburized case. Also, the presence of N 2 in the case, as in nitriding, increases its hardness. Most carbonitriding is done between 770 and 890 °C (1425 and 1625 °F) for gears to be liquid quenched and between 650 and 790 °C...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 September 2005
DOI: 10.31399/asm.tb.gmpm.t51250245
EISBN: 978-1-62708-345-4
... has better hardenability than a carburized case. Also, the presence of N 2 in the case, as in nitriding, increases its hardness. Most carbonitriding is done between 770 and 890 °C (1425 and 1625 °F) for gears to be liquid quenched and between 650 and 790 °C (1200 and 1450 °F) for gears not requiring...
Series: ASM Technical Books
Publisher: ASM International
Published: 30 April 2024
DOI: 10.31399/asm.tb.phtpp.t59380061
EISBN: 978-1-62708-456-7
... for purging, preheating, high-temperature processing, and gas or liquid quenching. Vacuum furnaces make it possible to perform a number of different operations. Vacuum heat treating furnaces can: Prevent surface reactions (e.g., oxidation or decarburization) on workpieces, primarily because...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2022
DOI: 10.31399/asm.tb.isceg.t59320195
EISBN: 978-1-62708-332-4
... chemistry, microstructure, and integrity are austenitized, liquid-quenched, and held at designated temperatures for targeted durations to ensure isothermal transformation of austenite. The resultant unique structure is known as ausferrite , where platelets of ferrite nucleate and excess carbon diffuses...
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 December 2000
DOI: 10.31399/asm.tb.htgpge.t67320021
EISBN: 978-1-62708-347-8
... Abstract Through-hardening heat treatment is generally used for gears that do not require high surface hardness. In through hardening, gears are first heated to a required temperature and then cooled either in the furnace or quenched in air, gas, or liquid. Four heat treatment methods...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 30 April 2024
DOI: 10.31399/asm.tb.phtpp.t59380121
EISBN: 978-1-62708-456-7
... to provide accurate control of surface carbon and carbon gradient. It is well adapted to virtually any type of quenching system. Most carburized products are liquid quenched from an elevated temperature. The parts may be quenched in water, brine, caustic, proprietary liquids, oil, or molten salt...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2015
DOI: 10.31399/asm.tb.spsp2.t54410439
EISBN: 978-1-62708-265-5
... shortness associated with copper and overheating and burning as occur during forging. It addresses various types of embrittlement, including quench embrittlement, tempered-martensite embrittlement, liquid-metal-induced embrittlement, and hydrogen embrittlement, and concludes with a discussion on high...
Image
Published: 01 August 2018
Fig. 16.22 Microstructural evolution of a weld metal containing Cr = 19% and Ni = 11% during solidification. Solidification was performed by quenching in liquid tin. Left of the image: the steel that was liquid when quenched. The dendrites grow as ferrite (δ) from the liquid. Later, austenite More
Series: ASM Technical Books
Publisher: ASM International
Published: 01 September 2008
DOI: 10.31399/asm.tb.fahtsc.t51130001
EISBN: 978-1-62708-284-6
..., it is difficult to separate the design stage from steel grade selection because the two steps are interdependent. The choice of a certain grade of steel, such as one that must be brine or water quenched, will affect all aspects of design and manufacture. In general, any steel grade that requires liquid quenching...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2006
DOI: 10.31399/asm.tb.pht2.t51440141
EISBN: 978-1-62708-262-4
... of the total operation. However, in most gas and liquid (salt bath) carburizing operations, the workpiece is quenched from an elevated temperature following the carburizing cycle. Therefore, in this specific section, it is considered that the carburized work is also hardened in a continuous cycle. A second...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2007
DOI: 10.31399/asm.tb.smnm.t52140117
EISBN: 978-1-62708-264-8
... is transferred directly to the liquid touching the steel, causing the liquid temperature to increase, which, in turn, decreases its density. As this less dense liquid rises, it is replaced by colder liquid that comes in contact with the steel piece. The motion of the quenching liquid is called convection, also...
Series: ASM Technical Books
Publisher: ASM International
Published: 31 December 2020
DOI: 10.31399/asm.tb.phtbp.t59310055
EISBN: 978-1-62708-326-3
... unaffected by the quenching medium. This can be accomplished by insulating the area to be protected or by allowing the quenchant to contact only those areas of the part that are to be quenched. Spray quenching: Streams of quenching liquid are directed at high pressure, up to 825 kPa (120 psi), to local...
Image
Published: 01 December 1996
Fig. 4-1 (a) Schematic illustration of the three stages of cooling upon quenching a steel into a liquid. (b) Photographs of a cylinder quenched into a polymer quenchant, showing the three stages of cooling. ((a) from J. Bodin and S. Segerberg in Quenching and Distortion Control , G.E. Totten More
Image
Published: 01 December 1999
2. Carburize 1050 °C, 35 min; diffuse 13 min; cool to 845 °C; oil quench Network carbides 3. Carburize 1050 °C, 35 min; diffuse 13 min; cool to 845 °C; oil quench. (With subzero liquid nitrogen) Network carbides 4. Carburize 1050 °C, 35 min; diffuse 13 min; cool to 845 °C; oil quench More
Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 2008
DOI: 10.31399/asm.tb.emea.t52240395
EISBN: 978-1-62708-251-8
... Abstract This chapter discusses the process characteristics, advantages, disadvantages, and applications of various processes involved in surface hardening of steel. These include pack carburizing, liquid carburizing, gas carburizing, vacuum carburizing, plasma carburizing, gas nitriding...
Image
Published: 01 March 2012
Fig. 6.20 Three stages of a peritectic reaction in a unidirectionally-solidified high-speed steel. (a) First-stage structure. Dark gray is austenite; white is ferrite. The mottled structure is quenched liquid. (b) Subsequent peritectic transformation of (a). (c) Further peritectic More