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induction tempering

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Published: 01 August 2015
Fig. 4.55 Induction tempering of a part that has been (a) hardened on the inside surface and (b) hardened on the outside surface. Source: Ref 13 More
Image
Published: 01 August 2015
Fig. 7.10 Computer simulation of time-temperature diagram for induction tempering of 18 mm (0.7 in.) diameter medium-carbon steel rods traveling at 100 mm/s (4 in./s). Each coil is 50 mm (2 in.) long, and the distance between coils is 100 mm (4 in.). Source: Ref 6 More
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
... Abstract Induction hardened steels are often tempered to increase their ductility and relieve quenching stresses. During tempering, martensitic microstructures supersaturated with carbon decompose into a more stable, ductile form. This chapter discusses the transformations associated...
Image
Published: 01 March 2006
Fig. 9 Variation of hardness with tempering temperature for furnace and induction heating. Source: Ref 5 More
Image
Published: 01 August 2015
Fig. 7.6 Variation of hardness with tempering temperature for furnace and induction heating. Source: Ref 4 More
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2006
DOI: 10.31399/asm.tb.pht2.t51440159
EISBN: 978-1-62708-262-4
... be tempered after the hardening operation. Tempering prevents cracking by relieving some of the stress set up in hardening and imparts some degree of toughness to the hard case. Induction Hardening Electromagnetic induction is a very important and widely used method of heating a metal part. It can...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2015
DOI: 10.31399/asm.tb.piht2.t55050191
EISBN: 978-1-62708-311-9
.... The initial applications involved hardening of the surfaces of round steel parts such as shafts. Subsequent surface-hardening techniques were developed for other parts whose shapes are not so simple. Most recently, induction-hardening and tempering techniques have been developed for purposes of heat treating...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2015
DOI: 10.31399/asm.tb.piht2.t55050001
EISBN: 978-1-62708-311-9
... collapse on impact, to explode the missile. The requirement was for the body to be hard but the nose totally soft. At that time induction tempering did not produce parts in specification. A 20 kW RF induction heater was used for austenitizing with direct tank-loaded coils (high voltage). The coils...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2015
DOI: 10.31399/asm.tb.piht2.t55050301
EISBN: 978-1-62708-311-9
...-­treating furnaces produce a thin layer of iron carbide and nitrides on the surface of a steel part. When quenched, the layer is very hard. The case depth may be 0.0762 to 0.3048 mm (0.003 to 0.012 in Nitrides make the parts resistant to induction tempering. Therefore, parts that have been carbonitrided may...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2015
DOI: 10.31399/asm.tb.piht2.9781627083119
EISBN: 978-1-62708-311-9
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2015
DOI: 10.31399/asm.tb.piht2.t55050057
EISBN: 978-1-62708-311-9
... Fig. 4.54 Dual bus bar with coils. Source: Ref 12 Tempering Coils Where the workpieces are magnetic, induction tempering is performed at temperatures below the Curie point. The heating rate is slower, and possible heating should be done from the opposite side of the area to be tempered...
Series: ASM Technical Books
Publisher: ASM International
Published: 31 December 2020
DOI: 10.31399/asm.tb.phtbp.t59310163
EISBN: 978-1-62708-326-3
... Abstract This chapter discusses the processes involved in the heat treatment of steel, namely austenitizing, hardening, quenching, and tempering. It begins with an overview of austenitizing of steels by induction heating, followed by a discussion on the processes involved in transformation...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2015
DOI: 10.31399/asm.tb.piht2.t55050093
EISBN: 978-1-62708-311-9
... containing more than 0.18% carbon are induction hardened to improve wear and strength. Group II—Medium Carbon (0.30 to 0.55% Carbon) Because of the higher carbon content, quenching and tempering become increasingly important when steels of this group are considered. They are the most versatile...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2015
DOI: 10.31399/asm.tb.piht2.t55050175
EISBN: 978-1-62708-311-9
... for defining induction-hardened cases will not define decarburization very well unless the workpieces are tempered at a sufficiently high temperature to produce dark, tempered martensite when etched. Decarburization lowers surface hardness, producing a soft, low-strength area, and permits plastic deformation...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2015
DOI: 10.31399/asm.tb.piht2.t55050215
EISBN: 978-1-62708-311-9
... produced by quenching and tempering. AISI 4150 steel has high enough carbon to quench optimally to a surface hardness of 63 HRC. However, if 4150 is fully annealed, it may not quench over 54 HRC when induction hardened. Fig. 11.2 As-quenched hardness vs. carbon content. Source: Ref 2 After...
Image
Published: 01 August 2015
Fig. 5.20 Tempered martensite: 1052 steel induction hardened with 14% polymer quench and tempered at 206 °C (400 °F). The as-quenched hardness is HRC 56.2. Nital etched. (a) 200×. (b) 1000×. Source: Courtesy of Aston Metallurgical Services, Inc. More
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2015
DOI: 10.31399/asm.tb.spsp2.t54410499
EISBN: 978-1-62708-265-5
... into a quench tank. In all cases, the quenched parts are tempered to improve toughness and relieve stresses induced by the surface hardening. Induction Heating Induction heating is an extremely versatile method for hardening steel. Uniform surface hardening, localized surface hardening, through...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2015
DOI: 10.31399/asm.tb.piht2.t55050173
EISBN: 978-1-62708-311-9
... Abstract The surface condition of metals can have a significant effect on the outcome of high-temperature processes and vice versa. This chapter discusses the general cleaning and surface treatment needs of work in-process both before and after induction hardening. It identifies contaminants...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 September 2005
DOI: 10.31399/asm.tb.gmpm.t51250249
EISBN: 978-1-62708-345-4
... not lend itself to carburizing and quenching the entire part. This chapter focuses on the processes involved in the induction and flame hardening, covering the applicable materials, hardening patterns, preheat treatment, quenching, tempering, surface hardness, case depth, hardening problems, dual-frequency...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2000
DOI: 10.31399/asm.tb.htgpge.t67320175
EISBN: 978-1-62708-347-8
... hardened and on process details involved in induction hardening gears. It discusses the processes involved in heating, quenching, and tempering of gears. Information on surface hardness and case depth after induction hardening, induction hardening problems, the applications of induction hardening gears...