Detail publikace

Electron beam surface heat treatment of selected materials

Originální název

Electron beam surface heat treatment of selected materials

Anglický název

Electron beam surface heat treatment of selected materials

Jazyk

en

Originální abstrakt

Focused high power electron beam is one of the up to date tools for surface heating. It may be used for welding, engrawing, and shape corrections, moreover for surface heat treatment and alloying. From the point of view of nowadays machinery practice this is a technique which allows extremely precise localization and dosage of applied energy to the specified volume of surface. Then the exactly bordered area or the profiled detail can be treated with minimum energy surplus and thus minimal heat affected zone, distortions etc. The device can work in several modes according to type of heating localization. First possibility is one-time (quasi-continuous) heated area is given by power of device, speed of beam scanning and possibility of modulating beam power, when created heated area should be maximal homogenous. The other possibility is gradual process, when electron beam heats defined area and the part is moving or the stable part is heated field moving thanks to beam deflection. This mode provides highest surface energy density. Hardened line can be the only one separate line or more adjacent lines putted next to the other eventually with small overlapping in order to assure treatment of the larger areas. But these processes require structure analysis and properties of transitional area between lines. This contribution deals with description of electron beam treatment abilities including some theoretical aspects, and microstructures of pilot experiments carried out. Effect of surface EB hardening of three materials, carbon structural steel C45, low alloy steel 42CrMo4, and high chromium ledeburitic tool steel X210Cr12, was analysed in the paper. Maximal depth of hardened has been obtained by applying gradual hardening. Microstructure gradient changes have been described in sections perpendicular to specimen surface trough and between individual surface hardened beads of the steel 42CrMo4

Anglický abstrakt

Focused high power electron beam is one of the up to date tools for surface heating. It may be used for welding, engrawing, and shape corrections, moreover for surface heat treatment and alloying. From the point of view of nowadays machinery practice this is a technique which allows extremely precise localization and dosage of applied energy to the specified volume of surface. Then the exactly bordered area or the profiled detail can be treated with minimum energy surplus and thus minimal heat affected zone, distortions etc. The device can work in several modes according to type of heating localization. First possibility is one-time (quasi-continuous) heated area is given by power of device, speed of beam scanning and possibility of modulating beam power, when created heated area should be maximal homogenous. The other possibility is gradual process, when electron beam heats defined area and the part is moving or the stable part is heated field moving thanks to beam deflection. This mode provides highest surface energy density. Hardened line can be the only one separate line or more adjacent lines putted next to the other eventually with small overlapping in order to assure treatment of the larger areas. But these processes require structure analysis and properties of transitional area between lines. This contribution deals with description of electron beam treatment abilities including some theoretical aspects, and microstructures of pilot experiments carried out. Effect of surface EB hardening of three materials, carbon structural steel C45, low alloy steel 42CrMo4, and high chromium ledeburitic tool steel X210Cr12, was analysed in the paper. Maximal depth of hardened has been obtained by applying gradual hardening. Microstructure gradient changes have been described in sections perpendicular to specimen surface trough and between individual surface hardened beads of the steel 42CrMo4

BibTex


@inproceedings{BUT114770,
  author="Jiří {Matlák} and Miloslav {Kouřil} and Ivo {Dlouhý}",
  title="Electron beam surface heat treatment of selected materials",
  annote="Focused high power electron beam is one of the up to date tools for surface heating. It may be used for welding, engrawing, and shape corrections, moreover for surface heat treatment and alloying. From the point of view of nowadays machinery practice this is a technique which allows extremely precise localization and dosage of applied energy to the specified volume of surface. Then the exactly bordered area or the profiled detail can be treated with minimum energy surplus and thus minimal heat affected zone, distortions etc. The device can work in several modes according to type of heating localization. First possibility is one-time (quasi-continuous) heated area is given by power of device, speed of beam scanning and possibility of modulating beam power, when created heated area should be maximal homogenous. The other possibility is gradual process, when electron beam heats defined area and the part is moving or the stable part is heated field moving thanks to beam deflection. This mode provides highest surface energy density. Hardened line can be the only one separate line or more adjacent lines putted next to the other eventually with small overlapping in order to assure treatment of the larger areas. But these processes require structure analysis and properties of transitional area between lines.
This contribution deals with description of electron beam treatment abilities including some theoretical aspects, and microstructures of pilot experiments carried out. Effect of surface EB hardening of three materials, carbon structural steel C45, low alloy steel 42CrMo4, and high chromium ledeburitic tool steel X210Cr12, was analysed in the paper. Maximal depth of hardened has been obtained by applying gradual hardening. Microstructure gradient changes have been described in sections perpendicular to specimen surface trough and between individual surface hardened beads of the steel 42CrMo4",
  booktitle="MULTI-SCALE DESIGN OF ADVANCED MATERIALS",
  chapter="114770",
  howpublished="electronic, physical medium",
  year="2015",
  month="may",
  pages="145--152",
  type="conference paper"
}