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martempering

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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.a0005802
EISBN: 978-1-62708-165-8
... Abstract This article describes the advantages of martempering and the use of oil and salt as quenchants in the martempering process. It also discusses safety precautions to be followed by an operator and reviews the steels that are suitable for martempering. The article provides information...
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Published: 01 October 2014
Fig. 19 Distortion in gray iron cylinder liners after martempering and after conventional oil quenching. Before being measured, liners were furnace tempered for 2 h at 200 °C (400 °F). More
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Published: 30 September 2014
Fig. 27 Variation in cooling rate of a martempering oil as a function of time in use. A, new oil; B, 3 month old oil; C, 7 month old oil; D, 25 month old oil. Source: Ref 4 More
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Published: 31 August 2017
Fig. 20 Distortion in gray iron cylinder liners after martempering and after conventional oil quenching. Before being measured, liners were furnace tempered for 2 h at 200 °C (400 °F). More
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Published: 01 August 2013
Fig. 9 Position of thermocouples for (a) quenching test and (b) martempering test. Courtesy of Isoflama Ind. Com., Indaiatuba, Brazil More
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Published: 01 August 2013
Fig. 12 Residual-stress results from conventional gas quenching and martempering in an AISI H13 block. Source: Ref 17 More
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Published: 01 August 2013
Fig. 18 Approximate maximum diameters of bars that are hardenable by martempering, oil quenching, and water quenching More
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Published: 01 August 2013
Fig. 20 Martempering time versus section size and agitation of quench bath for 1045 steel bars. Effects of bar diameter and agitation of quench bath on time required for centers of 1045 steel bars to reach martempering temperature when quenched from a neutral chloride bath at 845 °C (1550 °F More
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Published: 01 August 2013
Fig. 28 Distortion in martempering (Example 6). Histograms of distortion data on shafts of 8625 steel (machined from bar stock) after carburizing at 925 °C (1700 °F) and martempering in oil at 165 °C (325 °F). Shafts were heat treated in the vertical position: the top two shafts were suspended More
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Published: 01 August 2013
Fig. 29 Distortion in martempering (Example 6). Histograms of distortion data on forged shafts of 8625 steel after carburizing at 925 °C (1700 °F) and martempering in oil at 165 °C (325 °F). Shafts were supported vertically on one end during heat treatment. Type of quench Dimensional 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. 65 Effect of increasing water content on a martempering salt bath at 200 °C (390 °F). Source: Ref 168 More
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Published: 01 August 2013
Fig. 77 Cooling curves of a martempering oil under reduced pressure, which were obtained using the JIS K2242:1980 silver probe More
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Published: 01 August 2013
Fig. 92 Viscosity of two martempering oils as a function of time in use. Variations such as these may be observed from oil-to-oil and tank-to-tank. Source: Ref 188 More
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Published: 01 August 2013
Fig. 96 Cooling rate variation of a martempering oil with increasing time in use. Source: Ref 188 More
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Published: 30 August 2021
Fig. 18 Cooling paths for (a) martempering, (b) austempering, and (c) time quenching superimposed on the isothermal transformation curve for eutectoid steel More
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Published: 01 February 2024
Fig. 5 Approximate maximum diameters of bars that are hardenable by martempering, oil quenching, and water quenching More
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Published: 01 February 2024
Fig. 31 Effect of water additions on cooling curves in a martempering salt bath at 200 °C (390 °F). Adapted from Ref 31 More
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Published: 01 October 2014
Fig. 3 Changes in length on cyclic treating martempered L3 tool steel More