Resource-saving boron-containing high-speed steel composite roll and preparation method thereof

Abstract

The invention discloses a resource-saving boron-containing high-speed steel composite roll and a manufacturing method thereof, wherein the composite roll provided by the invention is prepared through centrifuging compound casting of an outer layer part and a roll core part. The outer layer comprises the following raw materials in percentage by weight: 35% of alloy scrap iron of high-speed steel roll, 20-25% of alloy scrap iron of high-chromium iron roll, 15-20% of alloy scrap iron of high nickel-chromium infinite chilled cast iron roll, 4-8% of tungsten dreg-iron alloy, 1.0-1.5% of ferroboron, 1.0-1.2% of low-carbon ferromanganese, 0.15-0.25% of ferrotitanium, 0.2-0.3% of yttrium-base heavy-tombarthite antaciron, 0.25-0.30% of nitrogenized ferrochrome, 0.2-0.3% of magnesium-aluminum-calcium alloy, and the balance of low-carbon waste steel sheet. The roll core is spheroidal graphite cast iron. The composite roll has the advantages of good comprehensive mechanical property and abrasive resistance, is manufactured by utilized roll processing dregs as main raw material, has the characteristics of resource conservation, low cost and the like, and has good economic and social benefits in popularization and application.

Description

technical field [0001] The invention relates to a composite roll and a preparation method thereof, in particular to a resource-saving boron-containing high-speed steel composite roll and a preparation method thereof, belonging to the technical field of steel rolling. Background technique [0002] Rolls are the main consumable spare parts in steel rolling production. The quality of rolls directly affects the surface quality of rolled materials, the operating rate of rolling mills and the production cost of rolled materials. Improving the quality of rolls and reducing the production cost of rolls have always been the subject of continuous concern for roll manufacturers. [0003] At present, the commonly used hot roll materials include high-nickel-chromium infinitely chilled cast iron, semi-steel, high-chromium white cast iron and high-carbon high-speed steel. The former high-nickel-chromium infinitely chilled cast iron rolls are brittle due to the continuous network distributio...

AI Technical Summary

Problems solved by technology

Compared with the original double-layer or three-layer composite high-speed steel roll, the invention’s composite high-speed steel roll has a reduction of about 30% in the peeling rate of the working layer and a 50-60% reduction in the probability of roll breakage during the rolling process, but there are disadvantages such as complex manufacturing process

Moreover, the above-mentioned high-speed steel composite rolls all need to add more iron alloys such as tungsten, molybdenum, vanadium, niobium, etc., resulting in a huge waste of resources

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