Preparing method for machine barrel inner wall wear-resisting layer

Abstract

The invention discloses a preparing method for a machine barrel inner wall wear-resisting layer. The preparing method includes the following steps that powder is put into a machine barrel inner cavity, and openings in the two ends of a machine barrel are closed; the machine barrel is put into a heating furnace with the temperature ranging from 1000 DEG C to 1300 DEG C to be heated, the machine barrel maintains radial rotation when being heated and meanwhile maintains axial back-forth moving; the machine barrel is conveyed to a centrifugal part to be centrifuged; the machine barrel is conveyedto a machine barrel heat insulation part to be subjected to tempering treatment; the radial rotating speed ranges from 0.3 m / min-0.6 m / min; the axial back-forth moving speed ranges from 0.3 m / min-0.6m / min; and powder comprises formula components including, by weight percent, 2.5%-5% of carbon, 6%-10% of chromium, 1%-2% of manganese, 2%-5% of silicon, 2.5%-5% of nickel, 2%-5% of boron, 4%-5% of molybdenum and the balance iron. The preparing method has the beneficial effects that the formula is simple, the preparing cost is low, the melting temperature is low, the preparing energy consumption of the wear-resisting layer is low, in addition, after the wear-resisting layer is manufactured, the hardness is high, corrosion resistance and wear resistance are achieved, and the service life of themachine barrel can be effectively prolonged.

Description

technical field [0001] The invention relates to a machine barrel manufacturing technology, in particular to a preparation method of a wear-resistant layer on the inner wall of the machine barrel. Background technique [0002] There is a Chinese invention patent with the patent number CN201510537875.X titled "Preparation Method of High Wear-Resistant and Repairable Conical Double Barrel" which discloses a high wear-resistant and repairable conical double barrel The preparation method is that the round steel forging is firstly bored, and processed into a conical double-barrel blank with two intersecting inner holes and a cross-section in the shape of a figure-eight ring; ordinary steel is used to process it into the same taper as the inner hole of the barrel. Mandrel, the surface of two mandrels is spray-welded with a low-melting-point alloy wear-resistant layer, and the conical double-barrel mandrel is inserted into the blank hole of the barrel and pressed to form a barrel as...

AI Technical Summary

Problems solved by technology

This invention solves the difficult problem of centrifugal compound casting with conical double barrels. Under vacuum sintering, the alloy wear-resistant layer and the inner wall of the conical hole realize metallurgical bonding, which has higher bonding strength than inlaid cemented carbide materials, and is durable during use. The grinding layer will not fall off; however, the wear resistance of the alloy wear-resistant layer of the barrel made by this preparation method is still not ideal, the production cost is high, and the alloy wear-resistant layer is heated unevenly, and the alloy wear-resistant layer made The surface is not uniform enough and the effect is not ideal, so this method needs further improvement

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