Cobalt-less multi-element high speed tool steel and its manufacturing method

Abstract

A non-Co multi-element high-speed tool steel contains proportionally C, Si, Mn, S, P, Cr, V, Mo, W, Ni, Nb, Ti, Mg, RE and Fe. Its preparing process includes such steps as smelting by MF furnace, modifying with Y-based RE alloy, centrifugal casting, and heat treating.

Description

technical field [0001] The invention belongs to the technical field of steel rolling and relates to a cobalt-free multi-component high-speed tool steel, which is a new high-speed steel material for producing rolls and roll rings for various wire and bar rolling mills. The invention also relates to the manufacturing method of the cobalt-free multi-element high-speed tool steel. Background technique [0002] At present, with the development of steel rolling technology and equipment at home and abroad, the requirements for rolls, roll rings and guide rolls of various materials on the rolling mill are getting higher and higher. Due to the increase in the rolling speed of the rolling mill, as the main consumption tools on the high-speed wire rod rolling mill, the pair of roll rings require high hardness, high toughness, high thermal fatigue resistance and anti-sticking steel, while the tungsten carbide alloy used in the traditional rolling mill is expensive, resulting in Higher ...

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Problems solved by technology

Chinese patent documents CN1424423A and CN1264749A have proposed a method for manufacturing high-speed steel roll rings containing cobalt and aluminum, but cobalt is a rare metal with a large content, resulting in high production costs. At the same time, the quenching temperature reaches 1160 ° C, and high-temperature heat treatment makes quality control difficult. Big

Chinese patent document CN1174764 proposes a powder metallurgy hot pressing sintering method, but the production process is complicated and the equipment is huge

The Chinese patent document CN1454723A proposes a high-speed steel composite roller ring that adopts ordinary centrifugal casting in the manufacturing method, and uses ordinary paint in the mold, so it is difficult to remove the mold during the cleaning process after the casting is completed.

Chinese patent document CN1164379C proposes a manufacturing method for high-speed steel roll sleeves, which is mainly produced by electroslag remelting. Compared with the present invention, its equipment investment is large and energy consumption is high.