Study on Crack Control of High Speed Steel Roll Made by Centrifugal Casting Technology
This is studied by means of roll material, casting parameters, cooling parameters for the cracking of high speed steel (HSS) rolls, centrifugal casting, and mold parameters. It is effectively achieved by the addition of an appropriate amount of potassium and rare earth (RE) high speed steel rolls. (Ie, resistance to thermal cracking) increased by 32.77% to 158 & Ntilde, and the line shrinkage (ie, the shrinkage of the high speed steel, the unit distance) was reduced. In addition, the temperature field and the stress field in the roll can be improved by using a variable speed centrifugal casting, variable flux casting variable speed cooling technology, which helps to improve the filling and solidification of molten steel and eliminate cracks.
centrifugal casting machine is a widely used technology in the manufacture of metal rolls, with low energy consumption, small pollution, simple, high efficiency. It can also be used in the manufacture of high speed steel (HSS) with high hardness, excellent red hardness, hardenability and abrasion resistance at high temperatures , ,  and . Cracked high-speed steel roll casting process, often encountered a major flaw. Previous studies have reported that the cracked centrifugal casting of high speed steel rolls has a strong influence on the alloy composition and centrifugal casting process parameters ,  and . In this study, we used the modification technique to improve the thermal crack resistance. In addition, in order to improve the filling and solidification of the molten steel and eliminate the cracks, we study the distribution of the temperature field and the stress field regulated during a new centrifugal casting process by using a variable speed centrifugal casting technique, variable pouring process and variable speed Cooling flux of solidification technology. , I.e., the total number of high speed steel roll high speed steel rolls has a ratio of the number of cracks to evaluate these different production processes.