Tecnologia em Metalurgia, Materiais e Mineração
https://tecnologiammm.com.br/article/doi/10.4322/2176-1523.20212442
Tecnologia em Metalurgia, Materiais e Mineração
Artigo Original - Edição Especial “Tributo ao Prof. T. R. Strohaecker”

Deep cryogenic treatment in AISI D2 tool steel punches to enhance tool life

Fabiano Dornelles Ramos, Josué de Oliveira Bairros, Mauro Francisco Castro Moscoso

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Abstract

New materials and heat treatment are being developed worldwide to improve tool life. Tool steels are expensive due
to the alloying elements and fabrication costs. Therefore, the maximization of tool life keeping good surface finishing is
especially important to keep the processes attractiveness. The application of cryogenic treatment is promising to enhance
mechanical and metallurgical properties of cold work tool steel parts. The possibility of increasing the finer secondary
carbides content and decreasing amount of retained austenite during deep cryogenic treatment (DCT) is also an important
matter for industry. The aim of this work is to improve tool life by applying DCT in AISI D2 cutting punches and compare
these results with punches treated by conventional heat treatment (CHT), vacuum furnace quenching plus triple tempering.
The tests used for analyses were: metallography, X-ray diffraction, carbides fraction, hardness and number of parts produced
by each punch (practical test). The results indicate that the DCT punches have an enhancement of approximately 50% in
its useful life.

Keywords

Deep Cryogenic; Treatment; Tool life; Tool steel.

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Submetido em:
14/08/2020

Aceito em:
16/12/2020

6064d068a953957de3103ff2 tmm Articles
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