Preparation method of anticorrosive and abrasion-resistant layer of machine barrel

Abstract

A preparation method of an anticorrosive and abrasion-resistant layer of a machine barrel includes the following steps that nickel base spherical tungsten carbide alloy powder is placed in an inner cavity of the machine barrel, and the openings at both ends of the machine barrel are closed; the machine barrel is placed in a heating furnace with a temperature of 1000-1300 DEG C for heating, and when the machine barrel is heated in the heating furnace, radial rotation and axial movement back and forth are maintained at the same time; the machine barrel is conveyed to a centrifugal part for centrifugation; the machine barrel after centrifugation is conveyed to a machine barrel heat preservation part for tempering treatment; the radial rotation speed is 0.3-0.6 meters per minute; the speed ofmovement in the axial direction back and forth is 0.3-0.6 meters per minute; and the formula compositions of the nickel base spherical tungsten carbide alloy powder comprise, by weight percentage, 40-45% of spherical tungsten carbides, 3-5% of silicon, 1-2% of molybdenum, 7-10% of chromium, 2-5% of boron, and the balance nickel. The preparation method has the advantages that the preparation costof the abrasion-resistant layer is low, the abrasion-resistant layer is high in hardness, anticorrosive and abrasion-resistant after preparation, and the service life of the machine barrel can be effectively prolonged.

Description

technical field [0001] The invention relates to a machine barrel manufacturing technology, in particular to a method for preparing an anti-corrosion and wear-resistant layer of a machine barrel. Background technique [0002] The applicant's original application number is CN201710645353.0, and the Chinese invention patent application titled "A Manufacturing Method of Screw Barrel Wear-Resistant Layer" discloses a manufacturing method of screw barrel wear-resistant layer, which includes the following steps, 1. Add wear-resistant powder into the inner cavity of the barrel and then seal the openings at both ends of the barrel; 2. Transport the barrel to a heating furnace with a temperature of 1000-1300°C for heating, and keep the radial direction when the barrel is heated in the heating furnace Rotate and axially move back and forth; 3. Centrifuge the barrel in the centrifugal part. 4. Transport the centrifuged barrel to the heat preservation part and temper the barrel. The barr...

AI Technical Summary

Problems solved by technology

The advantage is that this method overcomes the defect of low heating temperature at both ends of the barrel and high middle temperature in the heating furnace, and the wear-resistant powder placed in the inner cavity of the barrel is heated evenly, so that the wear-resistant powder is melted at the same temperature , oxidation, so that the molten liquid evenly covers the inner peripheral surface of the inner cavity of the barrel, so that the performance of the wear-resistant layer is completely consistent; however, the defect of this production method is that the wear-resistant powder used in this method uses a large amount of Iron element, the barrel made of it is easy to be corroded when it is used for injection molding or extrusion processing, which will affect the service life of the wear-resistant layer, so this production method needs further improvement

Images