SU1608480A1 - Method of testing materials for attrition - Google Patents

Abstract

The invention relates to wear tests and can be used to assess the wear resistance of materials in relation to the operating conditions of mining equipment. The purpose of the invention is to improve the accuracy of testing by eliminating erosion wear with a liquid. A device for implementing the method comprises a rotor 1 with radial channels 2, a hopper 5 for abrasive particles associated with the channels 2. The samples are located along the periphery of the rib 1. The tank 11 is connected to the nozzles 9. Before the test, the abrasive particles are moistened with liquid. The particles are jetted through the channels 2 of the rotating rotor 1 onto the wearing surface, and at the same time along this surface a liquid is supplied to wet it. 1 ill., 1 tab.

Description

The invention relates to the field of wear testing and can be used to assess the wear resistance of materials in relation to the operating conditions of mining equipment.

The purpose of the invention is to improve the accuracy of testing by eliminating erosion wear with a liquid.

The drawing shows a device for testing materials for wear when exposed to liquid and a jet of abrasive particles.

The device comprises a vertical rotor 1 with radial channels 2, a receiver 3 communicating with it, located coaxially with the rotor 1, a rotational drive 4 and a hopper 5 for abrasive particles communicating with the receiver 3,

In the plane of rotation of the radial channels 2 circumferentially, there are holders 6 of samples 7, mounted on the housing 8 of the installation, which is made in the form of a thin-walled box with a conical bottom. Nozzles 9 are mounted above the samples 7. Connected by the main 10 with the capacity 11 for the liquid.

The method is implemented as follows.

The abrasive particles are mixed in a special vessel with a liquid, for example, corrosive, and fed into the bunker 5, from where they, under the action of gravitational force, enter the receiver 3 and from it, under the action of centrifugal force due to the rotation of the rotor 1, into the radial

channels 2, where an increase in the speed of abrasive particles occurs and, at the exit of the canals 2, an abrasive stream hits the wearing surface of the samples 7. Simultaneously with the impact of the abrasive jet, liquid is supplied via line 10 from the tank 11 to the nozzles 9 and provide a continuous flow of fluid along the wearing surface of the samples 7 for wetting.

Example. Abrasive particles were moistened in a special vessel for 5 minutes. Lime (, 6) and tap water were tested as fluid. Wear tests were performed at

impact speed of abrasive particles with

sample surface 29 m / s and angle of attack

45 °. As an abrasive used

quartz sand with a grain size of 100200 microns. As sample material

used steel 45, cast iron SCH18-36 and steel 1H18N10T. The test results are shown in the table.

Claims (1)

Claims method of testing materials for wear, consisting in that they act on material samples with liquid and abrasive particles and determine the wear of samples, characterized in that, in order to improve the accuracy of the test by eliminating erosion wear with liquid, before testing the abrasive particles are moistened with liquid and the liquid is fed to the samples along their wear surface separately from the jet of particles.