Effect of Cryosoaking Period on Soft Tempering Temperature and Wear Mechanism in AISI H11 Tool Steel

Dhokey, N. B.; Lalge, P.; Rajankar, A.; Bawane, Kaustubh; Mahajan, Rajshri C.

doi:10.1007/978-981-13-0411-8_51

Cited by 2 publications

(3 citation statements)

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“…They are also subjected to high-temperature tempering (570-620 • C) in CHT, which almost completely eliminates retained austenite [252,333]. For treatment of these steels, cryogenic treatment was implemented after performing some (tempering) 'pre-treatments' involving heating to temperatures above 500 • C (after CT without tempering (sequence E) or followed by high-temperature tempering (sequence F)) [19,22,49,51,122,199,[260][261][262]. In these cases, there was a minimal effect on the hardness of AISI H13 steel [199,262] or a marginal increase of 1-1.5 HRC for AISI H11 steel treated at −184 • C for 16-24 h [22,121,260,261].…”

Section: Hot Work Tool Steelsmentioning

confidence: 99%

“…For treatment of these steels, cryogenic treatment was implemented after performing some (tempering) 'pre-treatments' involving heating to temperatures above 500 • C (after CT without tempering (sequence E) or followed by high-temperature tempering (sequence F)) [19,22,49,51,122,199,[260][261][262]. In these cases, there was a minimal effect on the hardness of AISI H13 steel [199,262] or a marginal increase of 1-1.5 HRC for AISI H11 steel treated at −184 • C for 16-24 h [22,121,260,261]. When AISI H13 steel was tempered at a low temper-ature (100-110 • C) after CT at −185 • C for 8-32 h, there was a greater hardness increase: 5 HRC after 16 h [19] or 2.2 HRC after 32 h [263].…”

Section: Hot Work Tool Steelsmentioning

confidence: 99%

“…Despite considerable inconsistencies in the test conditions (counterpart nature, load, sliding speed, and distance), some general outcomes can be derived. For AISI H11, H13, and H21 steels, a 16-24 h treatment at −184 • C (or −185 • C) was recommended to achieve the lowest wear rate against steel counterparts [19,49,51,122,199,200,[259][260][261][262]269]. However, when hard alumina counterparts were used for wear performance examination, after CT at −180 • C for 32 h, there was only a 12% wear performance improvement in H13 steel [267].…”

Section: Hot Work Tool Steelsmentioning

confidence: 99%

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Cryogenic Treatment of Martensitic Steels: Microstructural Fundamentals and Implications for Mechanical Properties and Wear and Corrosion Performance

Jurči,

Dlouhý

2024

Materials

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Conventional heat treatment is not capable of converting a sufficient amount of retained austenite into martensite in high-carbon or high-carbon and high-alloyed iron alloys. Cryogenic treatment induces the following alterations in the microstructures: (i) a considerable reduction in the retained austenite amount, (ii) formation of refined martensite coupled with an increased number of lattice defects, such as dislocations and twins, (iii) changes in the precipitation kinetics of nano-sized transient carbides during tempering, and (iv) an increase in the number of small globular carbides. These microstructural alterations are reflected in mechanical property improvements and better dimensional stability. A common consequence of cryogenic treatment is a significant increase in the wear resistance of steels. The current review deals with all of the mentioned microstructural changes as well as the variations in strength, toughness, wear performance, and corrosion resistance for a variety of iron alloys, such as carburising steels, hot work tool steels, bearing and eutectoid steels, and high-carbon and high-alloyed ledeburitic cold work tool steels.

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