Journal
MATERIALS CHEMISTRY AND PHYSICS
Volume 292, Issue -, Pages -Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.matchemphys.2022.126802
Keywords
Cryogenic treatment; Hot work tool steel; AISI H13; Tempering; Wear
Categories
Funding
- Yildiz Technical University Scien- tific Research Projects Coordination Unit
- [FKD- 2022-4783]
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AISI H13 hot work tool steels exhibit increased hardness and improved wear resistance after cryogenic treatment and tempering processes. The martensite morphology changes and carbides form during tempering. Surface analysis reveals that delamination and abrasion occur predominantly during sliding.
AISI H13 hot work tool steels were subjected to shallow and deep cryogenic treatment. One set of the samples was single tempered, while the other set was double tempered. Cooling specimens to-196 degrees C increased martensite content and hardness. After tempering, martensite morphology changed, carbides of Cr7C3 and V2C precipitated, and some retained austenite transformed again. Hardness decrease remained limited due to carbide formation. Both cryogenic treatments and tempering processes improved the wear resistance, although the effect of double tempering seemed nebulous. Worn surface analysis revealed that delamination and abrasion pre-dominantly occurred during sliding based on microstructural alteration.
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