Method for preparing boracic low-alloy high-speed steel rolls

Abstract

The invention relates to a method for preparing boracic low-alloy high-speed steel rolls, which is characterized by comprising the following steps: firstly carrying out metal mold casting of the roll, wherein a roll body is made of boracic low-alloy high-speed steel, and a roll core is made of ductile cast iron; putting the roll into a heating furnace at the temperature of lower than 200 DEG C after rough machining, preserving heat for 1-3 hours, then heating to the temperature of 520-580 DEG C at the temperature rising speed of 15-25 DEG C per hour, and air cooling after heat preservation; and then, putting the roll into the heating furnace at the temperature of lower than 300 DEG C again, preserving heat for 1-2 hours, then heating to the temperature of 480-510 DEG C at the temperature rising speed of 28-40 DEG C per hour, cooling the furnace to the temperature of lower than 180 DEG C after heat preservation, and air cooling to the room temperature. The method not only has low energy consumption and a short heating processing period, but also has good use effect when being used for the heating processing of the boracic low-alloy high-speed steel roll.

Description

Method for preparing boron-containing low-alloy high-speed steel roll Technical field The invention belongs to the technical field of roll manufacturing, and specifically relates to a method for preparing a roll, in particular to a method for preparing a boron-containing low-alloy high-speed steel roll. Background technique Rolls are the main consumable parts in the production of steel rolling. The research on improving the wear resistance of rolls has always attracted attention at home and abroad. The use of high-speed steel instead of high-chromium cast iron, nickel-chromium cast iron, chromium-molybdenum cast iron and nickel-chromium-molybdenum cast iron to manufacture rolls is the main way to improve the wear resistance of rolls. Japanese Patent Publication JP6330235 discloses the chemical composition of a centrifugal cast high-speed steel roll material as follows: C: 1.4-2.6%, Si: 0.2-1.5%, Mn<1.5%, Cr: 3-8%, (2Mo+W) : 6-14%, V: 4-8%, Ti: 0.3-2.5%, the balance Fe. Un...

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Problems solved by technology

The above-mentioned roll material has excellent wear resistance, but contains more alloying elements, so the production cost is high

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