Composite reinforcement method for TiC/TiB2 base metal ceramic on surface of roller

Abstract

The invention discloses a composite reinforcement method for TiC / TiB2 base metal ceramic on the surface of a roller, and belongs to the technical field of metallurgical machinery. The composite reinforcement method comprises the processing steps of: cleaning the roller; performing plasma spraying of nickel base alloy or overlaying the nickel base alloy on the cleaned roller; turning the roller according to requirements of a steel groove rolling system to meet the technical requirements; and cladding on the surface of the roller by using an electric spark deposition process to form the TiB2 / TiC base metal ceramic by using a TiB2 / TiC base metal ceramic electrode. The composite reinforcement method has the advantages that: the roller performance is greatly improved and fixed-roller-diameter rolling can be guaranteed, so that the process stability in a rolling process is guaranteed, meanwhile, the service life of the roller is greatly prolonged, the roller consumption is reduced, and the steel rolling operability and the steel surface quality are improved. Compared with processes such as overlaying and laser, the composite reinforcement method can be used for repairing of primary and intermediate rolling roller, and most importantly, the composite reinforcement method can be directly used for surface treatment of the roller of a finishing mill group, so that remanufacturing of thesurface of the roller is realized.

Description

technical field [0001] The invention belongs to the technical field of metallurgical machinery, and in particular provides a TiC / TiB on the surface of a roll 2 A metal-ceramic composite strengthening method, suitable for ferrous and non-ferrous metal rolling mills. Background technique [0002] The roll is the key component and the largest consumption part in the rolling process of metal materials. There are mainly three types of rolls currently in use. One is the overall manufacturing of rolls, including centrifugal composite casting rolls. Among them, the centrifugal casting nickel-chromium-molybdenum infinite chilled composite rolls invented in the United States in the 1930s are known as milestones in the history of roll development and still occupy the The second is combined rolls, including ring rolls or sleeved rolls, which are mainly used in the production of high-end wires, bar finishing mills, and pipes; the third is surface treatment technologies, mainly laser tre...

AI Technical Summary

Problems solved by technology

[0004] ① Serious waste of metal materials, high energy consumption, and heavy pollution; the weight of the effective working layer of the roll is about 15% of the total weight of the roll, and they are all scrapped after use. It is difficult to separate and recycle precious alloys, and casting is an industry with high energy consumption and high pollution. ;

[0005] ②Long production cycle and low production efficiency;

[0006] ③The service life of the product is low and the consumption is large

[0008] ①Narrow application area; mainly used in rolling mills with small rolling force and shallow roll grooves;

[0009] ②The roller cover is thin, easy to break during use, and has low safety;

[0010] ③The structure of some products is complex and has strict requirements on the use environment

[0012] ①The coating structure is uneven, resulting in uneven wear of the rolls, which cannot be applied to the finishing mill;

[0013] ②The bonding strength between the coating and the roll matrix is ​​not enough, and it is easy to peel off during use;

[0014] ③The production efficiency is low and it is difficult to meet the production demand;

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