Boron-contained centrifugal composite high-speed steel roller and manufacturing method thereof

Abstract

The invention discloses a boron-contained centrifugal composite high-speed steel roller, which comprises an outer layer of the high-speed steel roller, a middle layer of the high-speed steel roller and a core of the high-speed steel roller. The manufacturing method includes steps of smelting, interrupted front treatment, roller pouring, annealing, rough machining, double tempering, finish machining and testing. By the method, three-layer composite roller technology is adopted in the boron-contained centrifugal composite high-speed steel roller, composite ability of the outer layer of the high-speed steel roller and the core of the high-speed steel roller is increased, the roller is less prone to spalling, high in rigidity and accident resistant ability, fine in abrasion resistance, safe in use, low in energy consumption and short in cycle in heat treatment, oxidation and decarburization of the roller and roller breakage in use are avoided. The manufacturing method is simple and hot quenching process is omitted.

Description

technical field [0001] The invention relates to the technical field of composite steel rolls, in particular to a boron-containing centrifugal composite high-speed steel roll and a preparation method thereof. Background technique [0002] With the rapid development of the metallurgical industry, my country's current annual output of rolled products is close to 670 million tons, accounting for about 50% of the world's total rolled products, and modern rolling technology generally uses low-temperature rolling and endless continuous rolling And other advanced rolling technology. The roll is a key component that is consumed in large quantities in steel rolling production. Therefore, high requirements are put forward for the performance and service life of the roll. The composite high-speed steel roll is widely used in the steel rolling industry for its high hardness, good wear resistance and excellent use effect. widely adopted and respected. [0003] High-speed steel roll is a ...

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Problems solved by technology

However, in the existing production technology, what the outer layer of the roll adopts is high-speed steel, and what the core of the roll adopts is ductile iron. The strength of ductile iron in the lower part is low, so that the roll has certain deficiencies in the production and use process, the composite ability of the outer layer of the roll and the core of the roll is not strong, and it is easy to peel off when rolling steel

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