Phase structure and fine microstructure of in-situ vanadium carbides in cast high-vanadium high-speed steel

2006 ◽  
Vol 12 (5) ◽  
pp. 371-375 ◽  
Author(s):  
Xu Liujie ◽  
Wei Shizhong ◽  
Xing Jiandong ◽  
Li Yan ◽  
Long Rui
Keyword(s):  
Phase Structure ◽  
High Speed ◽  
High Speed Steel ◽  
Fine Microstructure ◽  
Vanadium Carbides

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

Study of Residue Stress and Phase Structure of c-BN Films with BNx Implanted Buffer Interlayer on High Speed Steel Substrate

2012 ◽  
Vol 155-156 ◽  
pp. 795-799
Author(s):  
Jia Wu He ◽  
Zhi Hai Cai ◽  
Yue Lan Di ◽  
Zhen Yang
Keyword(s):  
Grain Size ◽  
Buffer Layer ◽  
Phase Structure ◽  
High Speed ◽  
Steel Substrate ◽  
High Speed Steel ◽  
Growth Conditions ◽  
Xps Analysis ◽  
Interfacial Mixing

In this paper, the influence of the BNx implanted buffer layer on growth and residue stress of c-BN films were mainly investigated. The experiment results showed that the introduce of BNx implanted buffer interlayer can increase the c-BN content in the films and reduce the residue stress obviously. When the nitrogen dose was 9.6×1017 N+/cm2, the residue stress of c-BN films reached the least value of 3.0GPa. AFM showed that the surface of the c-BN film on the BNx implanted buffer layer is low in roughness and small in grain size. XPS analysis results show an interfacial mixing in the buffer layer have an even N/B distribution. And the surface of buffer interlayer was mainly in BN phase, which is the main reason to improve the growth conditions and reduce the residue stress of c-BN films.

In situ observation on microstructural development of high-speed steel during carbon partitioning process

2018 ◽  
Vol 34 (9) ◽  
pp. 1079-1085 ◽  
Author(s):  
Lina Zhou ◽  
Guangze Tang ◽  
Xinxin Ma ◽  
Liqin Wang ◽  
Guohua Fan
Keyword(s):  
High Speed ◽  
High Speed Steel ◽  
Carbon Partitioning ◽  
Microstructural Development ◽  
In Situ Observation

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.

In situ synthesis and strengthening of powder metallurgy high speed steel in addition of LaB6

2017 ◽  
Vol 23 (6) ◽  
pp. 1150-1157 ◽  
Author(s):  
Weijun Shen ◽  
Linping Yu ◽  
Zhi Li ◽  
Yuehui He ◽  
Qiankun Zhang ◽  
...  
Keyword(s):  
Powder Metallurgy ◽  
High Speed ◽  
High Speed Steel ◽  
In Situ Synthesis

scholarly journals Comparison Of Oxidation Resistance of TiAlN Monolayer Coating And Its NaCo3 Nanostructured Version

2013 ◽  
Vol 21 (Special-Issue) ◽  
pp. 67-72
Author(s):  
Martin Sahul ◽  
Paulína Zacková ◽  
Ľubomír Čaplovič ◽  
Kristián Šalgó ◽  
Jana Bohovičová ◽  
...  
Keyword(s):  
Oxidation Resistance ◽  
High Speed ◽  
Elevated Temperatures ◽  
High Speed Steel ◽  
Phase Detection ◽  
X Ray Diffraction ◽  
Oxide Layers ◽  
Edx Analysis

Abstract The contribution deals with comparison of oxidation resistance of classical TiAlN monolayer coating and its advanced high hard nanostructured and multilayered nACo3 version at elevated temperatures. Both coatings were deposited onto AISI M36 high speed steel using unique LAteral Rotating Cathodes process (LARC®). “In - situ” X-Ray diffraction analysis was employed for determination of the beginning of oxides creation and phase detection at different heating temperatures. Scanning electron microscopy fitted with EDX analysis was used for observation of fracture areas and measurements of coatings and oxide layers thicknesses as well. Determination of chemical composition of coatings surfaces and elemental linescans through the coatings and oxide layers were performed using EDX analysis. All measurements of these coatings were carried out not only before but also after the thermal annealing.

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