A Method for Selecting the Location of Carbon-sprayed Film on Thermal Simulation Samples
A technology of simulating samples and thermal simulation, which is applied in the field of selecting the location of carbon sprayed films for thermal simulating samples, can solve the problems of affecting the analysis results of material precipitates, high technical requirements for operation, and easy deviation, so as to reduce the experimental cost and improve the The effect of inspection efficiency and reliability improvement
Active Publication Date: 2019-06-25
ANGANG STEEL CO LTD
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Problems solved by technology
Using a carving knife to describe the carbon-sprayed surface of the sample requires high operating skills for the operator, and it is easy to deviate, resulting in improper selection of the position of the carbon film of the sample, which will affect the analysis results of the precipitated phase of the material, and even lead to wrong conclusions. Therefore, It is very necessary to propose a method for selecting carbon-sprayed coatings for thermal simulation samples to solve the deficiencies in the prior art
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Embodiment 1
[0032] 1) Description of the processing technology of the thermal simulation sample: the test material is low-carbon low-alloy steel, and the material is processed into a cylindrical sample of Φ10×15mm. Use a thermal simulation testing machine to heat the sample to 1000°C, keep it warm for 3 minutes, and then, for 1s -1 The strain rate compresses the sample by 7.5mm, and the engineering strain is 50%;
[0033] 2) Polish and polish the sample in step 1 until there are no scratches on the surface, and use an alcohol solution containing 4% nitric acid to corrode its metallographic structure; the concentration of the alcohol solution is 75%.
[0034] 3) According to the test parameters in step 1, use Abaqus software to carry out finite element numerical simulation to obtain the strain distribution diagram of the thermal simulation sample under the set process conditions; as figure 1 As shown, the areas in the strain distribution diagram are: the undeformed area 1, the area along ...
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The invention provides a thermal simulation sample carbon spraying film position selecting method. According to the thermal simulation sample carbon spraying film position selecting method provided by the invention, aiming at the characteristic of non-uniform deformation of a thermal simulation sample during a hot working process, a carbon film zone having nominal strain and a carbon film zone having other strains are simultaneously obtained on the same thermal simulation sample, carbon films are prevented from being directly engraved by using a graver, and the operation difficulty is reduced; in addition, the carbon films with different strains have different shapes, the carbon films in the same shapes are used for observation and comparative analysis of a material precipitated phase, and the reliability of a precipitation behavior of an analysis material during the hot working process is increased; the carbon films in different shapes are used for researching the influence of the strains on material precipitation behaviors, the detection efficiency is increased, and the experiment cost is reduced.
Description
technical field [0001] The invention relates to the technical field of position selection of a carbon spray film, in particular to a method for selecting a position of a carbon spray film of a thermal simulation sample. Background technique [0002] The modern physical simulation technology of materials uses small samples and uses thermal simulation testing machines to study the changes in the organization and properties of materials under specific process conditions. The key to physical simulation of thermal compression is to obtain the unidirectional stress state of the material, that is, the uniform deformation of the material. However, in actual situations, due to the influence of friction between the sample and the end face of the indenter, the upper and lower end faces of the sample will appear smaller after the deformation is completed. And the convex waist drum shape in the middle, that is, uneven deformation occurs. The inhomogeneity of the deformation will increas...
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IPC IPC(8): G01N1/28G01N1/32
CPCG01N1/28G01N1/32
Inventor 赵宝纯严平沅李桂艳黄磊
Owner ANGANG STEEL CO LTD