Integrated Rapid Solidification and Heat Treatment using Computerized Electron Beam Processing

1986 ◽  
Vol 80 ◽  
Author(s):  
Atsushi Iwata ◽  
Anjum Tauqir ◽  
Peter R. Strutt
Keyword(s):  
Electron Beam ◽  
High Speed ◽  
High Speed Steel ◽  
Beam Deflection ◽  
Thermal Arrest ◽  
Fast Reaction ◽  
Electron Beam Processing ◽  
Rate Kinetics ◽  
Rapidly Solidified ◽  
High Degree

AbstractMartensitic refinement is observed in rapidly solidified high speed steel (M7) by introducing a short ‘thermal arrest’ during cooling. This is accomplished using microcomputer controlled electron beam deflection for the generation of preselectcd scanning patterns. Such a tcchnique provides a high degree of control over short-duration heating at high temperatures and thus facilitates the use of fast reaction rate kinetics. By programming a ‘thermal arrest’ in the austenite range it has been found possible to obtain a distribution of fine carbides within the solidification cells. These carbides, it was found, result in refinement of the martensitic structure.

High-Speed Steel Surface Modification by Electron-Beam Processing

2017 ◽  
Vol 906 ◽  
pp. 38-43 ◽  
Author(s):  
Bauyrzhan K. Rakhadilov ◽  
Zh.B. Sagdoldina ◽  
G.B. Tazhybaeva
Keyword(s):  
Electron Beam ◽  
High Speed ◽  
Steel Surface ◽  
High Speed Steel ◽  
High Hardness ◽  
Electron Beam Processing ◽  
Fine Carbide ◽  
Modified Layer ◽  
Industrial Accelerator ◽  
Carbide Particles

The structure and microhardness of high-speed steels P6M5, P9 and P18 after electron-beam processing were investigated in the work. Electron-beam processing was carried out on the industrial accelerator ELV-4. It was established that electron-beam processing allows to obtain a modified layer on the surface of fast-cutting steels with thickness of 20 μm with high hardness, consisting of fragmented martensite with fine carbide particles. It was determined that after electron beam processing the microhardness of high-speed steels increased to 9.5 GPa. It has been experimentally established that the growth of hardness and wear resistance of high-speed steels after electron-beam processing is the result of the formation of more fragmented martensite and a decrease in the size of carbide particles.

Microstructure, thermal, and mechanical characterization of rapidly solidified high strength Fe84.3Cr4.3Mo4.6V2.2C4.6

2010 ◽  
Vol 25 (6) ◽  
pp. 1164-1171 ◽  
Author(s):  
A. Schlieter ◽  
U. Kühn ◽  
J. Eckert ◽  
H-J. Seifert
Keyword(s):  
Mechanical Properties ◽  
High Speed ◽  
High Speed Steel ◽  
High Strength ◽  
Cast State ◽  
High Fracture ◽  
Complex Carbides ◽  
Rapidly Solidified ◽  
Heating Up

Systematic microstructural and mechanical investigations of the Fe84.3Cr4.3Mo4.6V2.2C4.6 alloy cast under special manufacturing conditions in the as-cast state and after specific heat treatment are presented to point out that the special manufacturing of the alloy led to high compression strength (up to 4680 MPa) combined with large fracture strain (about 20%) already in the as-cast state. One select chemical composition of the alloy, which was mentioned previously [Kühn et al., Appl. Phys. Lett.90, 261901 (2007)] enhanced mechanical properties already in the as-cast state. Furthermore, that composition is comparable to commercial high-speed steel. By the special manufacturing used, a high purity of elements and a high cooling rate, which led to a microstructure similar to a composite-like material, composed of dendritic area (martensite, bainite, and ferrite) and interdendritic area (e.g., complex carbides). The presented article demonstrates an alloy that exhibits already in the as-cast state high fracture strength and large ductility. Furthermore, these outstanding mechanical properties remain unchanged after heating up to 873 K.

Studies of Carbides in a Rapidly Solidified High-Speed Steel

1990 ◽  
Vol 21 (11) ◽  
pp. 3021-3026 ◽  
Author(s):  
Anjum Tauqir ◽  
Hans Nowotny ◽  
Peter R. Strutt
Keyword(s):  
High Speed ◽  
High Speed Steel ◽  
Rapidly Solidified

The study of high-speed electron beam deflection technology for VSB writers

2004 ◽  
Author(s):  
Junji Hirumi ◽  
Nobuyuki Yoshioka ◽  
Hiromichi Hoshi ◽  
Hiroyoshi Ando ◽  
Seiichi Tsuchiya ◽  
...  
Keyword(s):  
Electron Beam ◽  
High Speed ◽  
Beam Deflection

scholarly journals Study on high-speed beam deflection for electron beam machining.

1986 ◽  
Vol 4 (1) ◽  
pp. 84-90
Author(s):  
Taizo Iwami ◽  
Hidenobu Murakami ◽  
Seiji Yasunaga
Keyword(s):  
Electron Beam ◽  
High Speed ◽  
Beam Deflection
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