scholarly journals Effects of Alloying Elements on Microstructure, Hardness, Wear Resistance, and Surface Roughness of Centrifugally Cast High-Speed Steel Rolls

2009 ◽  
Vol 40 (11) ◽  
pp. 2568-2577 ◽  
Author(s):  
Dae Jin Ha ◽  
Hyo Kyung Sung ◽  
Joon Wook Park ◽  
Sunghak Lee
Keyword(s):  
Surface Roughness ◽  
Wear Resistance ◽  
High Speed ◽  
High Speed Steel ◽  
Alloying Elements ◽  
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

scholarly journals Effects of Tempering Temperature on Wear Resistance and Surface Roughness of a High Speed Steel Roll.

2001 ◽  
Vol 41 (8) ◽  
pp. 859-865 ◽  
Author(s):  
Jung Ho Lee ◽  
Jun Cheol Oh ◽  
Joon Wook Park ◽  
Hui Choon Lee ◽  
Sunghak Lee
Keyword(s):  
Surface Roughness ◽  
Wear Resistance ◽  
High Speed ◽  
High Speed Steel ◽  
Tempering Temperature ◽  
Steel Roll

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.

Enhancement of EDM Performance by Using Copper-Silver Composite Electrode

2020 ◽  
Vol 38 (9A) ◽  
pp. 1352-1358
Author(s):  
Saad K. Shather ◽  
Abbas A. Ibrahim ◽  
Zainab H. Mohsein ◽  
Omar H. Hassoon
Keyword(s):  
Surface Roughness ◽  
Material Removal Rate ◽  
Material Removal ◽  
High Speed ◽  
Composite Electrode ◽  
Removal Rate ◽  
Pure Copper ◽  
High Speed Steel ◽  
Pulse On Time ◽  
Pulse Off Time

Discharge Machining is a non-traditional machining technique and usually applied for hard metals and complex shapes that difficult to machining in the traditional cutting process. This process depends on different parameters that can affect the material removal rate and surface roughness. The electrode material is one of the important parameters in Electro –Discharge Machining (EDM). In this paper, the experimental work carried out by using a composite material electrode and the workpiece material from a high-speed steel plate. The cutting conditions: current (10 Amps, 12 Amps, 14 Amps), pulse on time (100 µs, 150 µs, 200 µs), pulse off time 25 µs, casting technique has been carried out to prepare the composite electrodes copper-sliver. The experimental results showed that Copper-Sliver (weight ratio70:30) gives better results than commonly electrode copper, Material Removal Rate (MRR) Copper-Sliver composite electrode reach to 0.225 gm/min higher than the pure Copper electrode. The lower value of the tool wear rate achieved with the composite electrode is 0.0001 gm/min. The surface roughness of the workpiece improved with a composite electrode compared with the pure electrode.

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