Low-alloy high speed steel roll material and preparation method thereof

Abstract

A kind of low alloy high speed steel roller material and the method to produce it. The chemical components of it is( weight percent): C: 1.2-1.8%, Cr: 4.5-6.5%, W: 1.0-3.0%, Mo: 1.0- 3.0%, V: 3.0-5.0%, Al: 0.6-1.2%, Si: 0.8-1.2%, N: 0.05-0.15 %, B: 0.04-0.12%, Nb: 0.05-0.20%, Ti: 0.06-0.18%, Y: 0.04- 0.15%, Mn<0.5%, P<0.04%, S<0.04%, the other is Fe, and the actual content of carbon of it is: 0.033W+0.063Mo+0.060Cr+0.200V+(0.08-0.20). It is made by smelting with electric cooker, the roller is molded by centrifugal complex cast or continuous complex cast, the roller will be quenched and tempered after it has been processed rudely, and the regulated size and accuracy will fulfilled after a fine machining at last. Less Tungsten and Molybdenum element are contained in the low alloy high speed steel roller material, and it does not contain the expensive Cobalt, the production cost of it is lower, and it own high red-hardness, obdurability and abrasion resistance. This patent can improve the productivity of the rolling mill, and prolong the life of roller, and decrease the cost of rolled metal.

Description

technical field [0001] The invention belongs to the technical field of wear-resistant materials, and relates to a high-speed steel material used as a roll and its manufacture, in particular to a low-alloy high-speed steel roll material with less alloy content and a manufacturing method thereof. Background technique [0002] With the advancement of steel rolling technology, including the relentless pursuit of higher rolling efficiency, higher rolled product quality and lower rolling cost, the roll manufacturing technology is also undergoing rapid development. In the late 1980s, Japan first developed high-speed steel rolls. Soon afterwards, steel companies in Europe and the United States also developed and used high-speed steel rolls one after another. At present, high-speed steel rolls have been widely used abroad, not only in cold and hot plate and strip mills, but also in wire, bar mills, roughing mills, steel pipe mills, etc. In recent years, dom...