Microstructural evolution of a dual hardening steel during heat treatment

被引：17

作者：

Hofinger, Matthias ^{[1
]}

Staudacher, Maximilian ^{[1
]}

Ognianov, Miloslav ^{[2
]}

Turk, Christoph ^{[2
]}

Leitner, Harald ^{[2
]}

Schnitzer, Ronald ^{[1
]}

机构：

[1] Univ Leoben, Dept Phys Met & Mat Testing, Franz Josef Str 18, A-8700 Leoben, Austria

[2] Voestalpine Bohler Edelstahl GmbH & Co KG, Mariazellerstr 25, A-8605 Kapfenberg, Austria

来源：

MICRON | 2019年 / 120卷

关键词：

Dual hardening steel; Heat treatment; Electron backscatter diffraction; Primary carbides; HIGH-SPEED STEEL; PRECIPITATION EVOLUTION; MARTENSITIC STEELS; CARBIDES; NI; BEHAVIOR;

D O I：

10.1016/j.micron.2019.02.004

中图分类号：

TH742 [显微镜];

学科分类号：

摘要：

Dual hardening steels combine precipitation of both secondary hardening carbides and intermetallic phases in a martensitic matrix. Due to this combination, the carbon content necessary to achieve high hardness levels can be reduced, resulting in a decreased amount of large and embrittling carbides. In this study, the influence of different heat treatments on microstructure evolution and secondary hardness is investigated. Different metallographic preparation methods were tested in order to visualize the microstructure. Carbides were characterized using spot-pattern electron backscatter diffraction. For light optical investigations, preparation with V2A-pickle lead to the best results. Preparation with colloidal silica suspension achieved the best results for investigations by scanning electron microscopy and for carbide characterization using electron backscatter diffraction. It was found that a homogenization treatment prior to austenitization was unable to increase the amount of dissolved carbides, and thus had no effect on secondary hardness. By increasing the austenitization temperature, the amount of carbides and secondary hardness could be increased significantly.

引用

页码：48 / 56

页数：9

共 30 条

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