Microstructure of tool steel upon combined semi-solid processing and thermomechanical treatment

被引：0

作者：

机构：

[1] Mašek, B.

[2] Aišman, D.

[3] Jirková, H.

来源：

Aišman, D. (daisman@vctt.zcu.cz) | 1600年 / Elsevier Ltd卷 / 586期

关键词：

Semi-solid processing can lead to microstructures with a high proportion of metastable austenite embedded in carbide-austenite network even in ordinary steels. This type of microstructure is a result of non-uniform distribution of alloying elements in a partially melted material. The paper deals with semi-solid processing and heat treatment of the ledeburitic steel with 1.8% carbon and 11% chromium. Its initial microstructure typically consists of ferrite matrix with primary chromium carbides and globular cementite particles. Upon semi-solid processing; the material comprised 95% metastable austenite; predominantly in the form of polyhedral grains with the size of 19 μm. Previous research has demonstrated the grain refinement effect of plastic deformation applied immediately after solidification. In follow-up experiments; the influence of thermomechanical treatment upon subsequent evolution of microstructure was studied. In this experiment; particular attention was devoted to the decomposition of metastable austenite and its contribution to microstructure refinement. Upon the transition through the semi-solid state; the material was cooled down below its solidus temperature and subjected to deformation. This was followed by several cooling schedules. Some of the schedules included a dwell at 600 C to allow metastable austenite to decompose. Cooling schedules were immediately followed by heating to austenitizing temperature and cooling to room temperature at an equal rate. These procedures produced various types of microstructures. The treatment with the dwell produced mixed-type microstructures with an exceptional form of martensite and partially decomposed carbide network. Processing without the dwell led to the development of microstructures with polyhedral retained austenite grains embedded in the original carbide network. Their hardness ranged from 445 to 850 HV30. © 2012 Elsevier B.V. All rights reserved;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

Journal article (JA)

引用

共 50 条

[1] Microstructure of tool steel upon combined semi-solid processing and thermomechanical treatment
Masek, B.
Aisman, D.
Jirkova, H.
JOURNAL OF ALLOYS AND COMPOUNDS, 2014, 586 : S165 - S167
[2] Effects of semi-solid thermomechanical processing on microstructure and mechanical properties of Al 2024
Hamzeh Negini
Amin Rezaei
Mahmoud Hajisafari
Hossein Momeni
Transactions of the Indian Institute of Metals, 2019, 72 : 1201 - 1209
[3] Effects of semi-solid thermomechanical processing on microstructure and mechanical properties of Al 2024
Negini, Hamzeh
Rezaei, Amin
Hajisafari, Mahmoud
Momeni, Hossein
TRANSACTIONS OF THE INDIAN INSTITUTE OF METALS, 2019, 72 (05) : 1201 - 1209
[4] Ceramic tool concepts for the semi-solid processing of steel alloys
Münstermann, S
Telle, R
MATERIALWISSENSCHAFT UND WERKSTOFFTECHNIK, 2006, 37 (04) : 324 - 328
[5] A review of the semi-solid processing of steel
H. V. Atkinson
A. Rassili
International Journal of Material Forming, 2010, 3 : 791 - 795
[6] A REVIEW OF THE SEMI-SOLID PROCESSING OF STEEL
Atkinson, H. V.
Rassili, A.
INTERNATIONAL JOURNAL OF MATERIAL FORMING, 2010, 3 : 791 - 795
[7] Investigation of the Microstructure of Rolled Semi-Solid Steel
Renbo SONG
JournalofMaterialsScience&Technology, 2002, (03) : 281 - 282
[8] Investigation of the microstructure of rolled semi-solid steel
Song, RB
Kang, YL
Sun, JL
Yang, XF
Zhao, AM
Mao, WM
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY, 2002, 18 (03) : 281 - 282
[9] EFFECT OF THE COOLING RATE AFTER SEMI-SOLID PROCESSING ON THE RESULTING MICROSTRUCTURE IN HIGH-CHROMIUM TOOL STEEL
Jirkova, Hana
Rubesova, Katerina
Pekovic, Michal
Opatova, Katerina
Masek, Bohuslav
METAL 2017: 26TH INTERNATIONAL CONFERENCE ON METALLURGY AND MATERIALS, 2017, : 807 - 812
[10] Glazing of tool dies for semi-solid steel forming
Brabazon, D.
Naher, S.
Biggs, P.
INTERNATIONAL JOURNAL OF MATERIAL FORMING, 2008, 1 (Suppl 1) : 985 - 988

← 1 2 3 4 5 →