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Statements

Subject Item
n2:RIV%2F49777513%3A23210%2F14%3A43918451%21RIV15-GA0-23210___
rdf:type
skos:Concept n15:Vysledek
dcterms:description
Processing in the semi-solid state allows the benefits of the process of forming and casting to be combined. In addition to obtaining complicated shapes, unusual forms of structures with exceptional properties can also be formed. A special processing procedure in the semi-solid state for very small parts has been developed, which is called mini-thixoforming, is able to handle CPM15V steel powder. From the original ferrite matrix with primary chromium - vanadium carbides - a mixed structure was obtained by processing consisting of metastable austenite, rod-shaped chromium - vanadium carbides and the original chromium - vanadium carbides. Compared to the initial state (micro hardness approx. HV10 330), this structure achieved, as a result of the relatively high rate of cooling in the form, a hardness of approx. 730 HV10. Due to the fact that this is a metastable structure, experimental heating to temperatures 400, 500, 600, 700, 800 ° C for 1 hour was performed. With exposure at temperatures 400 and 500 ° C there was a slight decrease in hardness of approx. 20 points, heat treatment at 600 ° C achieved hardness of 960 HV10. This state corresponds to an equivalent value of compressive strength of approx. 2880 MPa, Further increase in temperature leads to a continuous decrease in hardness due to decomposition of the metastable matrix. Thermal exposure at 700 °C, resulted in hardness of 585 HV10. After exposure to 800 ° C there was a significant decrease of hardness to 425 HV10. Processing in the semi-solid state allows the benefits of the process of forming and casting to be combined. In addition to obtaining complicated shapes, unusual forms of structures with exceptional properties can also be formed. A special processing procedure in the semi-solid state for very small parts has been developed, which is called mini-thixoforming, is able to handle CPM15V steel powder. From the original ferrite matrix with primary chromium - vanadium carbides - a mixed structure was obtained by processing consisting of metastable austenite, rod-shaped chromium - vanadium carbides and the original chromium - vanadium carbides. Compared to the initial state (micro hardness approx. HV10 330), this structure achieved, as a result of the relatively high rate of cooling in the form, a hardness of approx. 730 HV10. Due to the fact that this is a metastable structure, experimental heating to temperatures 400, 500, 600, 700, 800 ° C for 1 hour was performed. With exposure at temperatures 400 and 500 ° C there was a slight decrease in hardness of approx. 20 points, heat treatment at 600 ° C achieved hardness of 960 HV10. This state corresponds to an equivalent value of compressive strength of approx. 2880 MPa, Further increase in temperature leads to a continuous decrease in hardness due to decomposition of the metastable matrix. Thermal exposure at 700 °C, resulted in hardness of 585 HV10. After exposure to 800 ° C there was a significant decrease of hardness to 425 HV10.
dcterms:title
Modification of Metastable Microstructure of CPM15V Steel by Heat Exposure after Treatment in Semi-Solid State Modification of Metastable Microstructure of CPM15V Steel by Heat Exposure after Treatment in Semi-Solid State
skos:prefLabel
Modification of Metastable Microstructure of CPM15V Steel by Heat Exposure after Treatment in Semi-Solid State Modification of Metastable Microstructure of CPM15V Steel by Heat Exposure after Treatment in Semi-Solid State
skos:notation
RIV/49777513:23210/14:43918451!RIV15-GA0-23210___
n3:aktivita
n11:S n11:P
n3:aktivity
P(GAP107/12/2600), S
n3:cisloPeriodika
1
n3:dodaniDat
n9:2015
n3:domaciTvurceVysledku
n12:6179444 n12:9691367 n12:2610078 n12:5958725
n3:druhVysledku
n8:J
n3:duvernostUdaju
n14:S
n3:entitaPredkladatele
n4:predkladatel
n3:idSjednocenehoVysledku
30113
n3:idVysledku
RIV/49777513:23210/14:43918451
n3:jazykVysledku
n19:eng
n3:klicovaSlova
UHV SLEEM; Annealing; CPM 15V; Mini-thixoforming; Thixoforming; Semi- solid
n3:klicoveSlovo
n6:Annealing n6:Semi-%20solid n6:Mini-thixoforming n6:UHV%20SLEEM n6:CPM%2015V n6:Thixoforming
n3:kodStatuVydavatele
CH - Švýcarská konfederace
n3:kontrolniKodProRIV
[11D8F692A48A]
n3:nazevZdroje
Journal of Alloys and Compounds
n3:obor
n16:JG
n3:pocetDomacichTvurcuVysledku
4
n3:pocetTvurcuVysledku
6
n3:projekt
n5:GAP107%2F12%2F2600
n3:rokUplatneniVysledku
n9:2014
n3:svazekPeriodika
586
n3:tvurceVysledku
Böhme, Marcus Marcus Vančura, Filip Mašek, Bohuslav Jirková, Hana Wagner, Martin X.-F. Aišman, David
n3:wos
000328188800033
s:issn
0925-8388
s:numberOfPages
6
n18:doi
10.1016/j.jallcom.2013.04.064
n13:organizacniJednotka
23210