Durometer for measuring variable-temperature hardness of metal material

Abstract

The invention discloses a durometer for measuring the variable-temperature hardness of a metal material, and belongs to the technical field of metal material mechanical property testing instruments. The durometer is used for measuring the hardness of the metal material under the variable temperature environment. According to the technical scheme, an embedded heating body is adopted as a heating source, the embedded heating body and a heating furnace shell are isolated and insulated by nanometer heat insulation materials, water-cooling pipelines do not need to be installed, the structure is simple, operation is convenient, and the service life is long; high-purity nitrogen or argon is adopted as the protective atmosphere, and the sample surface is prevented from being oxidized; a thermocouple and a temperature controller are adopted for controlling the heating temperature, and the highest heating temperature of a hearth can reach 1000 DEG C. The durometer is the initiation for measuring the hardness of the metal material under the variable temperature environment, the problem that the variable temperature hardness of the metal material cannot be measured continuously is solved, the new testing means is provided for online measurement of the material variable temperature mechanical performance, the durometer has the advantages of being convenient to operate and accurate in measurement, and hardness value determination under various metal material variable temperature environments can be achieved.

Description

technical field [0001] The invention relates to a hardness tester for measuring the hardness of metal materials in variable temperature environments, and belongs to the technical field of testing instruments for the mechanical properties of metal materials. Background technique [0002] Hardness testing is an important testing item for evaluating the mechanical properties of materials. The usual hardness test is carried out at room temperature. Even to evaluate the hardness level of materials in different temperature environments, it is necessary to quickly cool the high-temperature state of the material to room temperature. As a result, the test results can only symbolically represent the variable temperature hardness value of the material, but cannot accurately reflect the hardness level under the specific test temperature conditions. [0003] In production practice and scientific research experiments, the evaluation of the service life of tool steel and wear-resistant co...

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Problems solved by technology

As a result, the test results can only symbolically represent the variable temperature hardness value of the material, but cannot accurately reflect the hardness level under the specific test temperature conditions

[0003] In production practice and scientific research experiments, the evaluation of the service life of tool steel and wear-resistant coatings requires the testing of variable temperature hardness, and the evaluation of the mechanical properties of materials during tempering, wear, thermal erosion, aging, and creep processes. On the one hand, there is a great demand for variable temperature hardness testing, but due to the lack of relevant testing methods, the development of online measurement of mechanical properties of materials at variable temperatures is severely limited, which is not conducive to the progress of new materials and new processes in the field of material science and production

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