scholarly journals Correlation of microstructure and thermal-fatigue properties of centrifugally cast high-speed steel rolls

2004 ◽  
Vol 35 (2) ◽  
pp. 481-492 ◽  
Author(s):  
Chang Kyu Kim ◽  
Jong Il Park ◽  
Jae Hwa Ryu ◽  
Sunghak Lee
Keyword(s):  
Thermal Fatigue ◽  
High Speed ◽  
High Speed Steel ◽  
Fatigue Properties ◽  
Centrifugally Cast ◽  
Steel Rolls

scholarly journals Effects of alloying elements on microstructure, hardness, and fracture toughness of centrifugally cast high-speed steel rolls

2005 ◽  
Vol 36 (1) ◽  
pp. 87-97 ◽  
Author(s):  
Chang Kyu Kim ◽  
Yong Chan Kim ◽  
Jong Il Park ◽  
Sunghak Lee ◽  
Nack J. Kim ◽  
...  
Keyword(s):  
Fracture Toughness ◽  
High Speed ◽  
High Speed Steel ◽  
Alloying Elements ◽  
Centrifugally Cast ◽  
Steel Rolls

Manufacture of centrifugal cast high speed steel rolls for wire rod mills

2004 ◽  
Vol 31 (5) ◽  
pp. 389-392 ◽  
Author(s):  
H. G. Fu ◽  
Q. Xiao ◽  
J. Xing
Keyword(s):  
High Speed ◽  
High Speed Steel ◽  
Wire Rod ◽  
Steel Rolls

scholarly journals Effect of Loading Mode on Very High Cycle Fatigue Properties of High Speed Steel

2012 ◽  
Vol 78 (794) ◽  
pp. 1411-1422
Author(s):  
Yuuji SHIMATANI ◽  
Kazuaki SHIOZAWA ◽  
Sizeng LI ◽  
Hiroto YAMAMOTO ◽  
Takehiro NAKADA ◽  
...  
Keyword(s):  
High Speed ◽  
High Cycle Fatigue ◽  
High Speed Steel ◽  
Fatigue Properties ◽  
Cycle Fatigue ◽  
Loading Mode ◽  
Very High Cycle Fatigue ◽  
Very High

Process Optimization and Properties of Laser Cladding High Vanadium High Speed Steel Coatings on Nodular Cast Iron

2013 ◽  
Vol 712-715 ◽  
pp. 611-614 ◽  
Author(s):  
Ni Jun Xu ◽  
Jian Bin Lv ◽  
Ting Sun ◽  
Chang Sheng Liu
Keyword(s):  
Wear Resistance ◽  
Cast Iron ◽  
Laser Cladding ◽  
High Speed ◽  
High Speed Steel ◽  
Nodular Cast Iron ◽  
Vanadium Content ◽  
Treatment Technology ◽  
Metallurgical Bonding ◽  
Steel Rolls

As withstanding very high loads, thermal cycling leading to thermal fatigue, and severe environmental in the steel industry, rolls with long service life are specially required. High speed steel with high vanadium content is a newly-developed wear-resistance material that has been studied and used in some countries for making steel rolls. As a surface treatment technology, laser cladding can fabricate coating to improve the wear resistance of substrate. In this paper, the substrates for laser cladding were nodular cast iron rolls, Nd: YAG solid pulsed laser was used to explore the feasibility of preparation high vanadium high speed steel (HVHSS) coatings. The Nd: YAG laser cladding results that the coated layers combined metallurgically with the substrate with a lot of microcracks. The average microhardness up to 650 HV is more than 2 times as high as that of the substrate. After laser remelting, a fully dense and crack free HVHHS coating with an excellent metallurgical bonding was deposited. The presence of VC in the coating mainly improves the microhardness of coating up to about 650 HV.

A Study of the Carbides in High-Speed Steel Rolls

2010 ◽  
Vol 638-642 ◽  
pp. 3356-3361 ◽  
Author(s):  
Yi Kun Luan ◽  
Nan Nan Song ◽  
Xiu Hong Kang ◽  
Dian Zhong Li
Keyword(s):  
Heat Treatment ◽  
Grain Boundaries ◽  
High Speed ◽  
Solidification Rate ◽  
High Speed Steel ◽  
Eutectic Carbides ◽  
Complex Carbides ◽  
Steel Rolls ◽  
Alloy Concentration

Carbides in HSS roll were studied systematically. The results showed that there were two kinds of carbides in HSS roll, 1st and 2nd carbides. 1st eutectic carbides included the chrysanthemum-like MC mainly consisting of V and the plate-like M2C rich in Mo. 2nd carbides were complex carbides, concentrating Fe, Cr, Mo and V elements. The morphology, distribution and alloy concentration of the 1st eutectic carbides were studied using OM, SEM and EDS. During heat treatment, evolution of the 1st eutectic carbides was analyzed. It was found that the MC carbides had no change in morphology, components and distribution, while the M2C carbides decomposed to M6C and MC. In order to improve the properties of HSS, a method of increasing solidification rate was defined to refine the eutectic carbides. After refinement, the eutectic carbides distributed both along the grain boundaries and inside the grains.

scholarly journals Non-equilibrium solidification and microsegregation in centrifugally cast high speed steel for rolls

2018 ◽  
Vol 54 (1) ◽  
pp. 59-66 ◽  
Author(s):  
U. Klancnik ◽  
B. Kosec ◽  
P. Mrvar ◽  
J. Medved
Keyword(s):  
Electron Microscopy ◽  
High Speed ◽  
Light And Electron Microscopy ◽  
High Speed Steel ◽  
Scanning Calorimetry ◽  
Centrifugally Cast ◽  
Eutectic Carbides ◽  
Thermo Calc Software ◽  
Equilibrium Solidification ◽  
Non Equilibrium

When regarding as-cast microstructures of highly alloyed metals, microsegregation of alloying elements is a common feature resulting from non-equilibrium conditions during solidification. The aim of this work is to predict the occurrence and severity of microsegregation in highly alloyed, centrifugally cast high speed steel used for rolls. The prediction was performed using thermodynamic Scheil-Gulliver modelling with Thermo-Calc software. The modelled predictions were then compared with differential scanning calorimetry, X-ray diffraction, light and electron microscopy with energy dispersive spectroscopy, all performed on an as-cast roll shell. Results show that chromium, molybdenum and vanadium have the highest tendency to microsegregation. Vanadium tends to form negative microsegregation, while molybdenum and chromium form positive microsegregation. Scanning electron microscopy revealed the presence of complex eutectic carbides, confirming the Scheil-Gulliver non-equilibrium solidification path via two main successive eutectic reactions.

The development of high speed steel rolls by extrusion casting

2004 ◽  
Vol 31 (1) ◽  
pp. 66-70 ◽  
Author(s):  
H. Fu ◽  
Q. Xiao ◽  
J. Xing
Keyword(s):  
High Speed ◽  
High Speed Steel ◽  
Steel Rolls
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