Process for manufacturing centrifugally-cast easy-cutting high-speed steel roll

Abstract

The invention relates to a process for manufacturing a centrifugally-cast easy-cutting high-speed steel roll, belonging to the technical field of manufacturing metallurgical rolls. The technical scheme is as follows: the process comprises the process steps of determining chemical components of a material of a roll body; determining parameters of a mold; performing multi-component composite breeding graphitization on high-speed molten steel of a working layer; spheroidizing a spheroidal graphite cast iron material of a core part; controlling the pouring temperature; controlling the rotating speed of a centrifuge to be 300-800 revolutions per minute; controlling cooling parameters; and controlling an annealing process, a quenching process and a tempering process of heat treatment. The process disclosed by the invention has the beneficial effects that the processability of the produced easy-cutting high-speed steel is improved, so that the processing difficulty and processing cycle of the high-speed roll can be reduced, the labor hour and cutting tools are saved, and significant economic benefits are achieved; when a boron carbide cutting tool is used for processing the easy-cutting high-speed steel roll and under the condition that the linear velocity of a processed part is 20m, the cutting depth is improved from 2mm to 3-5mm; and the feed speed is improved from 0.2mm / r to 0.4-0.5mm / r.

Description

technical field [0001] The invention relates to a centrifugal casting free-cutting high-speed steel roll manufacturing process, which belongs to the technical field of metallurgical roll manufacturing. Background technique [0002] The quality of the roll directly affects the intrinsic quality and specifications of metallurgical products. It has been more than 30 years since high-speed steel rolls have been used in the rolling industry. In 1988, Japan first began to adopt high-speed steel rolls, and the United States began to introduce high-speed steel rolls in the early 1990s. Europe started relatively late but developed rapidly. The use of high-speed steel rolls increases the single-groove rolling output of the rolls by 3-4 times, improves the dimensional accuracy of the rolled pieces, prolongs the working time, reduces the number of roll changes, and brings significant economic benefits to the rolling production. The cost-effectiveness of high-speed steel rolls has been...

AI Technical Summary

Problems solved by technology

[0003] The problem existing in the current background technology is that the processing and repair of high-speed steel rolls become extremely difficult due to the high hardness of the high-speed steel rolls.

In this way, not only high-grade cemented carbide tools (such as YG8, YG6, etc.) A high-speed steel roll capable of rolling high-speed steel and easy to cut

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