scholarly journals Theoretical and experimental investigation of thermal and oxidation behaviours of a high speed steel work roll during hot rolling

2017 ◽  
Vol 131-132 ◽  
pp. 811-826 ◽  
Author(s):  
G.Y. Deng ◽  
H.T. Zhu ◽  
A.K. Tieu ◽  
L.H. Su ◽  
M. Reid ◽  
...  
Keyword(s):  
Experimental Investigation ◽  
Hot Rolling ◽  
High Speed ◽  
High Speed Steel ◽  
Work Roll ◽  
Steel Work

A Study of Abrasive Wear on High Speed Steel Surface in Hot Rolling

2016 ◽  
Vol 846 ◽  
pp. 589-594 ◽  
Author(s):  
T. Hoang Phan ◽  
Ahn Kiet Tieu ◽  
Hong Tao Zhu ◽  
Bu Yung Kosasih ◽  
Qiong Wu ◽  
...  
Keyword(s):  
Abrasive Wear ◽  
Hot Rolling ◽  
High Speed ◽  
High Speed Steel ◽  
Work Roll ◽  
Contact Friction ◽  
Strip Surface ◽  
Debris Slide ◽  
Physically Based ◽  
Work Rolls

In hot rolling, the thermal cyclic of work rolls causes a superficial oxide scale, which plays an important role on the contact friction and wear. The asperities of oxidised strip surface and wear debris slide over the High Speed Steel (HSS) work roll surface which comprises of hard carbides within an iron matrix under high pressure and velocity. Abrasive wear occurs and the particles will be removed from HSS surface. The current study introduces the Discrete Element Method (DEM) to investigate this abrasive wear phenomenon. The model successfully provides a physically based abrasive roll wear predication of HSS work roll with the consideration of carbides and oxide layers. It has been found that the carbide shape in the HSS roll affects the wear significantly, which has not been reported by previous numerical simulations and is the main focus of this research.

Numerical Evaluation of a High Speed Steel Work Roll during Hot Strip Rolling Process

2017 ◽  
Vol 904 ◽  
pp. 55-60 ◽  
Author(s):  
Guan Yu Deng ◽  
Hong Tao Zhu ◽  
A. Kiet Tieu ◽  
Qiang Zhu ◽  
Li Hong Su ◽  
...  
Keyword(s):  
Thermal Stress ◽  
High Speed ◽  
Initial Temperature ◽  
High Speed Steel ◽  
Work Roll ◽  
Rolling Process ◽  
Hot Strip Rolling ◽  
Strip Rolling ◽  
Steel Work ◽  
Hot Strip

Hot strip rolling process is one of the most promising industrial processes to fabricate finished or semi-finished bulk products. Numerical analysis on the temperature and thermal stress distributions in a high speed steel work roll during hot rolling has been conducted based on a transient thermo-mechanical model. Influence of initial work roll body temperature on temperature and thermal stress has been discussed in detail by assuming different rolling stages. Compared to the work roll surface, stress is much smaller at depth of 2.1 mm and 5.0 mm, respectively. Results showed similar maximum circumferential thermal stress at both depths of 2.1 mm and 5.0 mm when the roll has initial temperature of 25 °C and 100 °C, but they are about 3 times and 8 times larger than at depth of 2.1 mm and 5.0 mm, respectively, when the initial temperature is 200 °C.

scholarly journals An Experimental Investigation on Bushing Geometrical Properties and Density in Thermal Frictional Drilling

2018 ◽  
Vol 8 (12) ◽  
pp. 2658
Author(s):  
Zülküf Demir ◽  
Cebeli Özek ◽  
Muhammed Bal
Keyword(s):  
Experimental Investigation ◽  
Aluminum Alloys ◽  
Wall Thickness ◽  
High Speed ◽  
High Speed Steel ◽  
Volume Ratio ◽  
Geometrical Properties ◽  
Friction Drilling ◽  
Tool Diameter ◽  
Geometrical Dimensions

In thermal friction drilling (TFD) operations, the geometrical dimensions of bushing shape, height and wall thickness are the most vital consequences, since these increase the connecting length and strength. In this paper, AA7075-T651 aluminum alloys with 2, 4, 6, 8, and 10 mm thicknesses were drilled with the TFD process in order to investigate density, volume ratio, and height and wall thickness of the bushings. The experiments were conducted at constant spindle speed and feed rate conditions by using High Speed Steel (HSS) conical tools of 5, 10, 15, and 20 mm in diameter. It was experimentally found that the bushing height and the wall thickness had a tendency to increase linearly with the increase in both material thickness and tool diameter. The effect of tool diameter was found to have more influence on the measurable values than the thickness of the drilled material. The density of the bushing changed trivially. Approximately 70–75 percent of the evacuated material formed the bushing shape in TFD operations.

High Temperature Oxidation of a Work Roll Grade High Speed Steel

2011 ◽  
Vol 76 (5-6) ◽  
pp. 451-468 ◽  
Author(s):  
N. F. Garza-Montes-de-Oca ◽  
R. Colás ◽  
W. M. Rainforth
Keyword(s):  
High Temperature ◽  
High Speed ◽  
High Temperature Oxidation ◽  
High Speed Steel ◽  
Work Roll ◽  
Temperature Oxidation
Sign in / Sign up

Export Citation Format

Share Document