Analysis on Crack Propagation Property of High Speed Steel Type White Cast Iron Roll in Hot Strip Rolling

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.

Download Full-text

On the Application Results and the Properties of Forged White Cast Iron Roll

Tetsu-to-Hagane ◽

10.2355/tetsutohagane1955.57.5_738 ◽

1971 ◽

Vol 57 (5) ◽

pp. 738-751 ◽

Cited By ~ 1

Author(s):

Yuichiro SATO ◽

Hiroshi KOHIRA

Keyword(s):

Cast Iron ◽

White Cast Iron ◽

Cast Iron Roll ◽

Iron Roll

Download Full-text

Effect of Pre Oxidation on the Sliding Wear of Multi-Component Ferrous Alloys

Tribology ◽

10.1115/imece2005-81963 ◽

2005 ◽

Author(s):

I. Hilerio ◽

M. A. Barron

Keyword(s):

Cast Iron ◽

High Speed ◽

Friction And Wear ◽

White Cast Iron ◽

High Speed Steel ◽

Tribological Behaviour ◽

Ferrous Alloys ◽

High Chromium ◽

Electron Microscopy Analysis ◽

Different Temperatures

Presence oxides on sliding surfaces can greatly influence friction and wear. Oxides have been usually considered as a friction and wear reducing agent acting as a solid lubricant. Effects of pre-oxidation, carried out at different temperatures, on the tribological behaviour of a high-speed steel and a high chromium white cast iron sliding against a ceramic material have been studied in this work. Wear was evaluated through a new methodology, which calculates the volume of removed material from topography data of the worn surface. Wear mechanisms were determined by scanning electron microscopy analysis. Results showed a large difference between wear rate of the studied materials. High speed steel had a much lower wear than high chromium white cast iron. However pre-oxidation did not cause any meaningful influence on the tribological behaviour of both material, at least in the conditions evaluated in this work.

Download Full-text

RED CUT COBALT

Alloy Digest ◽

10.31399/asm.ad.ts0367 ◽

1980 ◽

Vol 29 (8) ◽

Keyword(s):

Fracture Toughness ◽

Cast Iron ◽

High Speed ◽

Elevated Temperatures ◽

High Speed Steel ◽

Heat Treating ◽

High Speeds ◽

Red Hardness ◽

Nonferrous Alloys ◽

Cutting Point

Abstract RED CUT COBALT steel is made by adding 5% cobalt to the conventional 18% tungsten -4% chromium-1% vanadium high-speed steel. Cobalt increases hot or red hardness and thus enables the tool to maintain a higher hardness at elevated temperatures. This steel is best adapted for hogging cuts or where the temperature of the cutting point of the tool in increased greatly. It is well adapted for tools to be used for reaming cast-iron engine cylinders, turning alloy steel or cast iron and cutting nonferrous alloys at high speeds. This datasheet provides information on composition, physical properties, and hardness as well as fracture toughness. It also includes information on forming, heat treating, and machining. Filing Code: TS-367. Producer or source: Teledyne Vasco.

Download Full-text

X-ray thickness gauge for hot strip rolling mills

Electrical Engineering ◽

10.1109/ee.1948.6444099 ◽

1948 ◽

Vol 67 (5) ◽

pp. 441-444 ◽

Cited By ~ 5

Author(s):

C. W. Clapp ◽

R. V. Pohl

Keyword(s):

Thickness Gauge ◽

Hot Strip Rolling ◽

Strip Rolling ◽

Rolling Mills ◽

X Ray ◽

Hot Strip

Download Full-text

FE simulations of camber in hot strip rolling

Journal of Materials Processing Technology ◽

10.1016/s0924-0136(98)00144-7 ◽

1998 ◽

Vol 80-81 ◽

pp. 325-329 ◽

Cited By ~ 17

Author(s):

Annika Nilsson

Keyword(s):

Hot Strip Rolling ◽

Strip Rolling ◽

Fe Simulations ◽

Hot Strip

Download Full-text

Mechanical Analysis of Low and High Chromium Steels Used in Hot Strip Work Rolls

Solid State Phenomena ◽

10.4028/www.scientific.net/ssp.279.3 ◽

2018 ◽

Vol 279 ◽

pp. 3-9

Author(s):

Fethi Benkhenafou ◽

Ines Fernández Pariente ◽

F.Javier Belzunce ◽

Abdelkader Ziadi ◽

Ming Quan Shi ◽

...

Keyword(s):

Fracture Toughness ◽

High Speed ◽

Volume Fraction ◽

Research Work ◽

High Speed Steel ◽

Nodular Cast Iron ◽

High Chromium ◽

Eutectic Carbides ◽

Hot Strip ◽

Conventional Heat Treatment

Microstructure, hardness and fracture toughness of low and high chromium high speed steel used in hot strip mills and subjected to conventional heat treatment have been examined. The influence of tempering temperatures on the mechanical properties of these products, determined using tensile and fracture toughness tests, was studied in this research work. The developed microstructures have been characterized by XRD, optical microscopy and SEM examinations. Macrohardness and microhardness of the specimens have been evaluated by Vickers indentation technique. The fracture toughness of these products was investigated using the rupture weight on 3 points bending specimens. The plane strain fracture toughness KIc and the fracture strength were measured for each alloy. The shell is high harness high speed steels, and the core is nodular cast iron. It was found that most fracture occurred in the eutectic carbides formed by the high content alloy element, such as Mo,V,Cr, but that for the alloys with a reduced volume fraction of eutectic carbides, a small amount of crack propagation occurred in the austenitic dendrites.

Download Full-text