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

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.

New Phenokena in Electron Beam Glazing

1983 ◽  
Vol 28 ◽  
Author(s):  
P. R. Strutt ◽  
J. LeMAY ◽  
A. Tauqir
Keyword(s):  
High Speed ◽  
Steel Substrate ◽  
Processing Condition ◽  
High Speed Steel ◽  
Thin Layers ◽  
Source Surface ◽  
Simple Relationship ◽  
Discontinuous Surface ◽  
Pre Treatment ◽  
Rapidly Solidified

ABSTRACTLinear heat source surface melting studies have been carried out using a 1 to 15 kH oscillating beam incident on a steel substrate to produce a 3 to 35mm wide rapidly solidified strip of material at rates ranging from 1 to 100 cm.s−1. A simple relationship betweenmelt depth, power, and substrate velocity (V) has been determined at low values of V; limited results at higher velocities appear to follow the same relationship. A serendipitous discovery was the effect of prior surface homogenization treatment on the geometrical and microstructural uniformity of the subsequently formed rapidly solidified layers. This pre-treatment resulted in the formation of thin layers of uniform thickness under the most rapid processing condition (V = 100 cm.s−l). Omission of pre-treatnent resulted in irregular and sometimes discontinuous surface layers. In the case of a high speed steel of near peritectic composition (M2)pre-treatment resulted in the almost complete elimination of massive austenitic region within the dominant ferrite phase.

Microstructure simulation of rapidly solidified ASP30 high-speed steel particles by gas atomization

2016 ◽  
Vol 23 (3) ◽  
pp. 294-302 ◽  
Author(s):  
Jie Ma ◽  
Bo Wang ◽  
Zhi-liang Yang ◽  
Guang-xin Wu ◽  
Jie-yu Zhang ◽  
...  
Keyword(s):  
High Speed ◽  
High Speed Steel ◽  
Gas Atomization ◽  
Microstructure Simulation ◽  
Rapidly Solidified

Characterization of rapidly solidified powder of high-speed steel

2009 ◽  
Vol 190 (1-3) ◽  
pp. 51-57
Author(s):  
Marcel Miglierini ◽  
Adriana Lančok ◽  
Martin Kusý
Keyword(s):  
High Speed ◽  
High Speed Steel ◽  
Rapidly Solidified

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.

Characterization of rapidly solidified powder of high-speed steel

ISIAME 2008 ◽  
2009 ◽  
pp. 233-239
Author(s):  
Marcel Miglierini ◽  
Adriana Lančok ◽  
Martin Kusý
Keyword(s):  
High Speed ◽  
High Speed Steel ◽  
Rapidly Solidified

scholarly journals Secondary hardening in laser rapidly solidified Fe68(MoWCrVCoNiAlCu)32 medium-entropy high-speed steel coatings

2018 ◽  
Vol 159 ◽  
pp. 224-231 ◽  
Author(s):  
Hui Zhang ◽  
Bang Dou ◽  
Hao Tang ◽  
Yizhu He ◽  
Sheng Guo
Keyword(s):  
High Speed ◽  
High Speed Steel ◽  
Secondary Hardening ◽  
Rapidly Solidified
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