Bibliographic citations
Zavaleta, M., Mostacero, L. (2024). Propiedades mecánicas y resistencia al desgaste del acero AISI D2 con tratamiento convencional y criogénico profundo [Universidad Nacional de Trujillo]. https://hdl.handle.net/20.500.14414/21835
Zavaleta, M., Mostacero, L. Propiedades mecánicas y resistencia al desgaste del acero AISI D2 con tratamiento convencional y criogénico profundo []. PE: Universidad Nacional de Trujillo; 2024. https://hdl.handle.net/20.500.14414/21835
@misc{renati/1046118,
title = "Propiedades mecánicas y resistencia al desgaste del acero AISI D2 con tratamiento convencional y criogénico profundo",
author = "Mostacero Sanchez, Luis Enrique",
publisher = "Universidad Nacional de Trujillo",
year = "2024"
}
The work investigated why the size of the carbide, observed by optical microscopy (OM) and scanning electron microscopy (SEM), affected the mechanical properties of creep resistance and maximum tensile strength, hardness and abrasion wear resistance of AISI steel. D2 conventional heat treatment (CHT) and deep cryogenic treatment (DCT). SEM microscopy revealed a delay in carbide coarsening due to DCT, determined by a higher proportion of fine carbides or structure thinning. On the other hand, the thinning is largely due to the transformation of retained austenite into martensite observed in DCT specimens. The DCT increased the creep resistance by 296 MPa and the maximum tensile strength by 351 MPa, compared to the CHT, the average hardness of CHT specimens was 672.35 HV10 and 862.9 HV10 for DCT. Using optical microscopy (OM), the morphology was evaluated, observing the presence of globular Primary Carbides isolated and located in the center and grain edge of the AISI D2 in treatment by CHT and DCT. The specific EDAX of CHT and DCT specimens in the matrix and carbides show that in our case the CPs are MC, the DCT immediately after the CHT does not alter the chemical nature of the PCs. Image analysis of the carbide size in SEM micrographs at 1000 and 2000 determined the area of the PCs, at 1000 they were 2.05 μm2 in CHT and 1.46 μm2 DCT determining the fineness of the PC carbides, at 2000, it was of 0.23 μm2 CHT and 0.26 μm2 DCT, the determination was limited. The LSCs and SSCs were determined at 7000 the carbide size in CHT, the LSCs was 9.541 μm2 on average and for SSCs it was 1.72 μm2, on the other hand, for DCT specimens 4.56 μm2 was determined for LSCs 0.9085 μm2 on average for the SSCs evidencing the refinement of carbides. The abrasive wear tests of the DCT show an increase of 3.67 mm3 with respect to the CHT, which is attributed to the almost absence of retained austenite and a more homogeneous distribution of a greater number of finer SCCs in the DCT specimens.
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