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Impact friction fatigue testing machine

A fatigue testing machine, impact friction technology, applied in the direction of testing wear resistance, using repetitive force/pulse force to test the strength of materials, etc., can solve the problems of single cyclic load, can not realize loading under complex force conditions, and achieve reliable movement. , the effect of simple structure

Inactive Publication Date: 2014-07-02
YANSHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the technical problem that the existing fatigue testing machine bears a single cyclic load and cannot realize loading under complex force conditions, the purpose of the present invention is to provide a test equipment that is easy to operate, high in efficiency, and capable of performing repeated impact friction fatigue tests

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Utilize the present invention to carry out the impact friction fatigue test to the high manganese steel used for the frog, and the technological parameter is:

[0034] Rotary friction system speed: 28rpm;

[0035] Shock Loading System Shock Force: 10 4 N;

[0036] Impact frequency: 29HZ;

[0037] Test temperature: 25°C;

[0038] Test time: 6h;

[0039] The structure of high manganese steel for frogs is a single-phase austenite structure obtained by water quenching, with an average grain size of 100 μm. The surface of the sample is polished.

[0040] After treatment, a small amount of impact friction fatigue cracks and spalling occurred on the surface of the sample, such as Figure 7 shown.

Embodiment 2

[0042] Utilize the present invention to carry out the impact friction fatigue test to the high manganese steel used for the frog, and the technological parameter is:

[0043] Rotary friction system speed: 28rpm;

[0044] Shock Loading System Shock Force: 10 4 N;

[0045] Impact frequency: 29HZ;

[0046] Test temperature: 25°C;

[0047] Test time: 10h;

[0048] The structure of high manganese steel for frogs is a single-phase austenite structure obtained by water quenching, with an average grain size of 100 μm. The surface of the sample is polished.

[0049] After treatment, a large number of impact friction fatigue cracks and peeling occurred on the surface of the sample, such as Figure 8 shown.

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Abstract

The invention discloses an impact friction fatigue testing machine which comprises a reciprocating impact loading system, a rotary friction system, a drive system, a guide block and a rack, wherein the rack is of a vertical box frame structure, an upper box plate and a lower box plate are arranged at the middle of the rack, through holes are formed in the centers of the upper box plate and the lower box plate, and the drive system is arranged on the lower bottom surface of the lower box plate; the rotary friction system is located just above the drive system, and is placed in the through holes of the upper box body and the lower box body to be installed on the rack, and the reciprocating impact loading system is arranged on the rack through the guide block and located above the rotary friction system. According to the impact friction fatigue testing machine, through changing different test parameters, different impact loads and friction loads are adjusted, and two dynamic loads of an impact force and a friction force simultaneously act on a metal material to perform a fatigue test, thus the fatigue failure performance of the metal material is tested and evaluated.

Description

technical field [0001] The invention relates to testing equipment for testing and evaluating the fatigue performance of metal materials, in particular to an impact friction fatigue testing machine. Background technique [0002] The core purpose of developing a fatigue testing machine is to subject the sample or workpiece to the repeated stress of the actual working environment, to measure the fatigue behavior and fatigue life of the material, and to analyze the fatigue failure mechanism of the material. In order to meet the needs of different fatigue tests of materials, the types and functions of fatigue testing machines are constantly updated. Existing fatigue testing machines mainly include electro-hydraulic servo, pneumatic and mechanical types, which are usually suitable for routine fatigue tests under a single stress or strain state, such as: completing low-cycle fatigue tests by controlling cyclic strain; The high-cycle fatigue test is completed by controlling the cyc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N3/36G01N3/56
Inventor 张福成冯晓勇杨志南康杰
Owner YANSHAN UNIV
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