Test method for evaluating initial wear resistance of austenite high manganese steel under high impact load

Abstract

The invention relates to a test method for evaluating the initial wear resistance of austenite high manganese steel under a high impact load. The test method comprises the following steps of: (1) performing a simple pendulum impact scratch test by using a simple pendulum scratch testing machine; (2) calculating energy E consumed in a scratch forming process; (3) calculating the volume V of a sample surface scratch; and (4) calculating specific dissipating energy e according to a formula e=E / V and judging the level of the initial wear resistance of the austenite high manganese steel under the high impact load according to the magnitude of the specific dissipating energy e under the same test parameter condition. The simple pendulum impact scratch test has a function of simulating the micro-plowing and micro-cutting of abrasive wear, and has the impact energy loading characteristic when a single abrasive particle scratches a material surface with a certain impact force and the working condition is similar to that of the austenite high manganese steel under the high impact load, so the specific dissipating energy e obtained under the simple pendulum impact scratch test can represent the initial wear resistance of the material under the high impact load.

Description

technical field [0001] The invention relates to a method for evaluating the wear resistance of metal materials, in particular to a test method for the initial wear resistance of austenitic high manganese steel under strong impact loads. Background technique [0002] As a wear-resistant material, austenitic high-manganese steel is unmatched by other materials in terms of resistance to abrasive wear or chisel wear under strong impact and high stress. The structure of austenitic high manganese steel is a single-phase austenite structure or austenite plus a small amount of carbide structure after water toughening treatment (i.e. solution treatment). Under the action of impact load, the surface layer can quickly produce work hardening , its hardness rises sharply, which ensures its good wear resistance; while the inside is still austenite, maintaining its good toughness. The two biggest characteristics of austenitic high-manganese steel are that the greater the external impact l...

AI Technical Summary

Problems solved by technology

However, they cannot be used to evaluate the initial wear resistance of austenitic high-manganese steels, either on the materials studied or on the selection of test parameters for the evaluation method of wear resistance, and the materials evaluated in these documents Abrasion resistance is the amount of wear of a material over a period of time

However, the initial wear of austenitic high manganese steel under the first few strong impact loads is not involved, and the factors that change the surface dimension of austenitic high manganese steel under the initial load are not considered. Influence of initial wear resistance

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