Measuring method of ductile-brittle transition temperature
A technology of ductile-brittle transition temperature and measurement method, which is applied in the field of ductile-brittle transition temperature measurement, can solve problems such as complex process, low accuracy of measurement results, difficulty in ensuring sample consistency, etc., and achieve the goal of improving consistency and improving measurement results Effect
Inactive Publication Date: 2018-08-14
国能锅炉压力容器检验有限公司
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Problems solved by technology
Due to the use of multiple samples for testing, it is difficult to ensure the consistency of the samples, resulting in low accuracy of the measurement results
In addition, the process of impact test is complicated
Method used
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[0028] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0029] The measuring method of the ductile-brittle transition temperature provided by the embodiments of the present invention comprises steps:
[0030] Measure the Leeb hardness value of the same sample at several set temperatures to obtain several coordinate points;
[0031] According to the coordinate points, the curve of Leeb hardness value changing with temperature is drawn, and the temperature corresponding to the characteristic point of the curve is the...
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Abstract
The invention discloses a measuring method of the ductile-brittle transition temperature. The measuring method comprises the steps that a Richter scale hardness value of the same sample at different set temperatures is measured, so that a plurality of coordinate points are obtained; a curve of the Richter scale hardness values changing along the temperatures is drawn according to the coordinate points, so that the temperature corresponding to a characteristic point of the curve is the ductile-brittle transition temperature of the sample, wherein the curve has an upper horizontal line section and a lower horizontal line section, a middle horizontal line between the upper horizontal line section and the lower horizontal line section is intersected with the curve, the distance from the middlehorizontal line to the upper horizontal line section is the same as the distance from the middle horizontal line to the lower horizontal line section, and the characteristic point is a crossing pointof the curve and the middle horizontal line. The measuring method of the ductile-brittle transition temperature only needs to measure the Richter scale hardness value of the same sample at the different set temperatures rather than needing more than two samples, accordingly the consistency of the sample is improved, and therefore a measuring result is improved.
Description
Technical field [0001] The present invention relates to the technical field of ductile-brittle transition temperature measurement, and more specifically, to a method for measuring the ductile-brittle transition temperature. Background technique [0002] When the test temperature of the material is lower than a certain temperature, the impact absorption function decreases significantly, and the material changes from a ductile state to a brittle state. This temperature is the ductile-brittle transition temperature of the material. In order to obtain the characteristics of the material, the ductile-brittle transition temperature of the material needs to be measured. At present, the method for measuring the ductile-brittle transition temperature of materials is to process multiple samples and conduct impact tests at different temperatures. Since multiple samples are used for testing, it is difficult to ensure the consistency of the samples, resulting in lower accuracy of the me...
Claims
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IPC IPC(8): G01N25/12
CPCG01N25/12
Inventor 牛晓光代小号郝晓军陈双双张广兴郑相锋王志永王强杨新军陶业成
Owner 国能锅炉压力容器检验有限公司