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austempering

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Series: ASM Handbook
Volume: 4F
Publisher: ASM International
Published: 01 February 2024
DOI: 10.31399/asm.hb.v4F.a0007009
EISBN: 978-1-62708-450-5
... Abstract Martempering and austempering processes may eliminate the need for conventional oil quenching and tempering. This article presents the suitability of steels for martempering and austempering. It discusses the compositions of oils suitable for marquenching and modified marquenching...
Series: ASM Handbook
Volume: 4A
Publisher: ASM International
Published: 01 August 2013
DOI: 10.31399/asm.hb.v04a.a0005810
EISBN: 978-1-62708-165-8
... Abstract This article provides a detailed discussion on the factors involved in the selection of steels for austempering, including section thickness limitations of steel parts and modifications of austempering practice. The selection of steel for an austempered component is based...
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Published: 01 October 2014
Fig. 11 Effect of austempering on 52100 steel bearing performance in a contaminated environment. The more ductile lower bainitic microstructure has significantly more rolling contact-fatigue life than the martensitic microstructure. Source: Ref 17 More
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Published: 01 October 2014
Fig. 2 IT diagram of a processing sequence for austempering, with the M s and M f decreasing as the γ is enriched with carbon during stage I More
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Published: 01 October 2014
Fig. 6 Micrographs of ductile iron treated at different austempering temperatures. (a) Ductile iron austempered at 260 °C (500 °F) exhibits a fine acicular structure with the following typical properties: tensile strength, 1585 MPa (230 ksi); yield strength, 1380 MPa (200 ksi); elongation, 3 More
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Published: 01 October 2014
Fig. 19 Effect of austempering temperature on properties of ductile iron. (a) Yield strength and tensile strength versus austempering temperature. (b) Impact strength versus austempering temperature. Source: Ref 20 More
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Published: 01 October 2014
Fig. 20 Elongation versus austempering time for a group of ductile iron alloys. Source: Ref 21 More
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Published: 01 October 2014
Fig. 22 Photomicrographs of Carbidic ADI (CADI) treated at different austempering temperatures. (a) Carbidic ductile iron with 18% carbide by volume austempered at 370 °C (700 °F) (b) same iron as in (a) austempered at 260 °C (500 °F). Etched with 5% Nital. Courtesy of Applied Process, Inc. More
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Published: 01 January 1990
Fig. 22 Austempering process for cast iron. Source: Ref 17 More
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Published: 01 January 1990
Fig. 8 Relationship between austempering temperature and the strength and ductility of a 1.5Ni-0.3Mo alloyed ductile iron. Austenitizing temperature was 900 °C (1650 °F). Source: Ref 3 More
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Published: 01 January 1990
Fig. 16 Effect of austempering heat treatment on the performance of 52100 steel bearings. Source: Ref 8 More
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Published: 01 August 2013
Fig. 63 Comparison of (a) martempering and (b) austempering processes More
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Published: 01 August 2013
Fig. 10 Variation in dimensions of 3 mm (0.125 in.) thick levers after austempering and after water quenching and tempering. Horizontal bars represent groups of ten samples. More
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Published: 01 December 2008
Fig. 27 Austempering process for cast irons More
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Published: 01 December 1998
Fig. 16 Micrographs of ductile iron treated at different austempering temperatures. (a) Ductile iron austempered at 260 °C (500 °F) exhibits a fine acicular structure with the following properties: tensile strength, 1585 MPa (230 ksi); yield strength, 1380 MPa (200 ksi); elongation, 3 More
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Published: 01 December 1998
Fig. 5 Relationship between austempering temperature and the strength and ductility of a 1.5Ni-0.3Mo alloyed ductile iron. Austenitizing temperature was 900 °C (1650 °F). More
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Published: 01 December 2004
Fig. 18 Macrostructure of a spheroidal graphite iron etched by direct austempering after solidification. Source: Ref 13 More
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Published: 31 August 2017
Fig. 26 Austempering process for cast iron. Source: Ref 34 More
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Published: 31 August 2017
Fig. 14 Austenite grain structure in a direct austempering after solidification treated lamellar graphite iron. The continuous line indicates the transition between the columnar and equiaxed grain zones. Source: Ref 19 More
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Published: 31 August 2017
Fig. 1 Nucleation of ferritic bainite during austempering at 360 °C (680 °F) of (a) spheroidal and (b) flake graphite cast irons. Background is martensite. Source: Ref 1 More