scholarly journals Hard-yet-tough high-vanadium high-speed steel composite coating in-situ alloyed on ductile iron by atmospheric plasma arc

2017 ◽  
Vol 6 (3) ◽  
pp. 540-550
Author(s):  
Huatang Cao ◽  
Xuanpu Dong ◽  
Yutao Pei
Keyword(s):  
Composite Coating ◽  
Ductile Iron ◽  
High Speed ◽  
High Speed Steel ◽  
Atmospheric Plasma ◽  
Plasma Arc ◽  
Steel Composite

Temperature Control during the APN-Process on the Steel 1.3343

2012 ◽  
Vol 504-506 ◽  
pp. 1017-1022 ◽  
Author(s):  
Yana Lizunkova ◽  
Sergey Burov ◽  
Thomas Hassel ◽  
Marten Sebastian Bierbaum ◽  
Friedrich Wilhelm Bach
Keyword(s):  
Temperature Control ◽  
High Speed ◽  
Plasma Nitriding ◽  
Nitrided Layer ◽  
High Speed Steel ◽  
Atmospheric Plasma ◽  
Surface Zone ◽  
Plasma Arc ◽  
Large Gradient ◽  
Heat Penetration

Nitride layers on the high-speed steel 1.3343 were produced by means of transmitted plasma arc. The surface treatment with plasma arc leads to high thermal stress reliefs caused by the tracing point of the arc. To use the plasma arc to build up a nitrided layer without a deep heat penetration of the base metal requires a good knowledge of the temperature profile on and under the surface. The investigations show that the steel needs a stable temperature on the surface to reach maximum nitrogen input. At the same time the surface temperature must not reach the melting point of the material. To satisfy these two conflicting conditions an accurate temperature control is necessary. Surface temperatures, temperatures in the bulk and under the surface were measured by conductive and thermographic methods and were correlated with investigations of the resulting metallographic structure. It was shown that the temperature distribution in and under the surface zone during the atmospheric plasma-nitriding shows a large gradient and the material temperature at a depth of 100 µm is not more than 200 °C.

Enhanced Grain Refinement of W18Cr4V High‐Speed Steel using in situ TiN‐Nb‐Cr@Graphene/Fe Nanocomposite Inoculant

2021 ◽  
Author(s):  
Lina Bai ◽  
Chunxiang Cui ◽  
Jianjun Zhang ◽  
Lichen Zhao ◽  
Guixing Zheng ◽  
...  
Keyword(s):  
Grain Refinement ◽  
High Speed ◽  
High Speed Steel

In-situ Investigation during Tempering of a High Speed Steel with X-ray Diffraction

2005 ◽  
Vol 22 (6) ◽  
pp. 407-417 ◽  
Author(s):  
Manfred Wießner ◽  
Siegfried Kleber ◽  
Alfred Kulmburg
Keyword(s):  
High Speed ◽  
High Speed Steel ◽  
X Ray Diffraction ◽  
X Ray ◽  
In Situ Investigation

Mastering the production of nitrided high-speed steel in plasma-arc furnaces

Metallurgist ◽  
1988 ◽  
Vol 32 (8) ◽  
pp. 265-266
Author(s):  
V. G. Evchenko ◽  
V. F. Korneev ◽  
V. I. Oleichik ◽  
V. M. Antipov
Keyword(s):  
High Speed ◽  
High Speed Steel ◽  
Plasma Arc ◽  
Arc Furnaces

Morphology of In Situ VC Ceramics in High Speed Steel with High Vanadium Content

2010 ◽  
Vol 105-106 ◽  
pp. 46-48
Author(s):  
Liu Jie Xu ◽  
Hui Min Chen ◽  
Shi Zhong Wei ◽  
Rui Long
Keyword(s):  
Chemical Composition ◽  
Grain Boundary ◽  
Grain Boundaries ◽  
High Speed ◽  
High Speed Steel ◽  
Vanadium Content ◽  
Obvious Effect ◽  
Eutectic Modification ◽  
Homogeneous Distributions

The morphology and distribution of in-situ VC ceramics in cast high speed steel with about 5-10wt.% vanadium and 1.7-3.2wt.% carbon were studied. The results show that the elementary morphology of in-situ VC ceramics has six kinds: spherical, lumpy, flower shaped, strip, short rod shaped, and vermicular. The in-situ VC in high-speed steel has three kinds of distributions: grain boundary, chrysanthemum-like and homogeneous distributions, depending on the chemical composition of high-speed steel. The in-situ VC ceramics grows up along grain boundaries if the high-speed steel is hypoeutectic, leading to grain boundary distribution of VC ceramics. On the contrary, it distributes homogeneously when the high-speed steel is hypereutectic. Whereas, the in-situ VC ceramics takes on chrysanthemum distribution if the high speed steel is just eutectic. Modification can improve the morphology of primary VC ceramics, but has not obvious effect on the morphology of eutectic VC.

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