CN103616396B - The method of nondestructive rapid determining spring steel - Google Patents
The method of nondestructive rapid determining spring steel Download PDFInfo
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- CN103616396B CN103616396B CN201310469578.7A CN201310469578A CN103616396B CN 103616396 B CN103616396 B CN 103616396B CN 201310469578 A CN201310469578 A CN 201310469578A CN 103616396 B CN103616396 B CN 103616396B
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Abstract
The invention discloses a kind of method of nondestructive rapid determining spring steel, copper is adopted to be that two probes produced by material, one of them probe is heated to 200-400 DEG C, make the surface contact of the probe of heating and metal material to be detected, and form loop, electric potential difference in measure loop, when the electric potential difference in loop is 2.64-5.53mv, then determines that final metal product product to be detected be material is beta titanium alloy.The present invention utilizes the Seebeck effect of metal material, copper is adopted to pop one's head in as hot junction, the probe of heating and metal material to be detected are formed loop, and the electric potential difference in measure loop, thus judge whether metal material to be detected is spring steel, change the traditional analysis of mensuration metal material completely as chemical composition analysis method, metallographic method etc., without the need to will detect Sample transportation to laboratory, also damage can not be caused to the sample detected, while greatly improving detection efficiency, ensure that the security of detection, particularly for finished part, in detecting without the need to very strict material composition, good effect can be played.
Description
Technical field
The present invention relates to metal material field, especially a kind of method of nondestructive rapid determining spring steel.
Background technology
Proper use of metal material gives full play to the usability of material to it and the life-span of raising product is self-evident.Therefore just must carry out analysis to the kind of metal material to measure.Modal analyzing detecting method has chemical composition analysis to send out, spark polishes identification method and metallographic observation method.
Along with developing rapidly of China's science and technology, the technology such as space flight, aviation has had marked improvement, in these technical fields, has strict requirement to the material of product component.But, product may have material when makeing mistakes in process of production, such as, when needs use spring steel, if when being accidentally mixed into other metal material, and after producing a large amount of finished products, just find that product has the phenomenon of batch mixing, now, scraps certainly will cause serious waste if all carried out by all products.And adopt the composition of existing detection method to product to detect, not only efficiency is low, and can destroy product.Therefore, existing detection method effectively cannot detect Prefabricated parts.
Summary of the invention
The object of the invention is: a kind of method providing nondestructive rapid determining spring steel, it can in common metal material, and Quick Measuring makes spring steel, to overcome the deficiencies in the prior art.
The present invention is achieved in that the method for nondestructive rapid determining spring steel, copper is adopted to be that two probes produced by material, one of them probe is heated to 200-400 DEG C, make the surface contact of the probe of heating and metal material to be detected, and form loop, electric potential difference in measure loop, when the electric potential difference in loop is 2.64-5.53mv, then determines that metal material to be detected is spring steel.
The relation of electric potential difference in the temperature of probe and loop is, when probe is 200 DEG C, electric potential difference in loop is 2.64-2.66mv, when probe is 250 DEG C, electric potential difference in loop is 3.61-3.62mv, and when probe is 300 DEG C, the electric potential difference in loop is 4.56-4.58mv, when probe is 400 DEG C, the electric potential difference in loop is 5.51-5.53mv.
Principle of the present invention is: according to the thermoelectricity capability of metal material, namely thermoelectrical potential will be produced when metal material exists temperature difference at two ends, the thermoelectrical potential that the metal material of heterogeneity produces at the same temperature difference is also different, so the metallic conductor composition closed-loop path of two kinds of heterogeneities, when there is temperature difference in contact two ends, just there is thermoelectrical potential in loop and have thermocurrent to pass through, so-called Seebeck effect that Here it is.
Therefore, as long as design temperature difference and a kind of known metal material (standard sample), by measuring the electric potential difference in the loop of its composition, another kind of unknown metal material can just be judged.
Whether the present invention utilizes above-mentioned principle exactly, under metastable temperature difference, fix the material (standard sample) of a probe, utilize the electric potential difference of probe made of copper and detected materials to be spring steel to differentiate detected materials.Because the Performance comparision of the spring steel of the different trade mark is close, so acquire a certain degree of difficulty when differentiating the spring steel of the different materials trade mark, therefore the present invention is applicable to the less demanding occasion of the concrete trade mark to spring steel.
And study discovery according to inventor, temperature during detection is too low, and electric potential difference can be caused not obvious, differentiates difficulty.But the temperature of detection is higher, and namely temperature difference is larger, its numerical value detected also more can embody the difference between various material, but after temperature is higher than more than 400 DEG C, the numerical value of test produces drift on the contrary, inventor finds, this is because the surface of probe at high temperature occurs that oxidative phenomena causes, and high temperature is unfavorable for onsite application, and insulation difficulty, security is also poor.
Owing to have employed technique scheme, compared with prior art, the present invention utilizes the Seebeck effect of metal material, copper is adopted to pop one's head in as hot junction, the probe of heating and metal material to be detected are formed loop, and the electric potential difference in measure loop, thus judge whether metal material to be detected is spring steel, change the traditional analysis of mensuration metal material completely as chemical composition analysis method, metallographic method etc., without the need to will detect Sample transportation to laboratory, also damage can not be caused to the sample detected, while greatly improving detection efficiency, ensure that the security of detection.Particularly for the batch mixing problem of fabricated part; now under being difficult to carry out strict material composition analysis situation; need again the kind of clear and definite part material; whether the material adopting the present invention can measure part is spring steel; and testing process can not cause damage to part; also without the need to being disassembled by the parts assembled, very positive effect can be played especially.The present invention not only has remarkable result to the materials'use of civil area, and to defence and military product proper use of, the quick nondestructive of the mix product be assembled in important military equipment is differentiated, guarantee that the equipment quality of its product has very important significance safely.Thinking of the present invention is novel, swift to operate, and result is accurate, and remarkable benefit, result of use is good.
Embodiment
Embodiments of the invention 1: the method for nondestructive rapid determining spring steel, copper is adopted to be that two probes produced by material, one of them probe is heated to 200 DEG C, metal material to be detected is spring steel 65Mn, make the surface contact of the probe of heating and metal material to be detected, and form loop, detect the electric potential difference in tape loop is 2.64mv.
Embodiments of the invention 2: the method for nondestructive rapid determining spring steel, adopt copper to be that two probes produced by material, one of them probe is heated to 250 DEG C, and metal material to be detected is spring steel 60Si
2crV, makes the surface contact of the probe of heating and metal material to be detected, and forms loop, detects and learns that the electromotive force in loop is 3.61mv.
Embodiments of the invention 3: the method for nondestructive rapid determining spring steel, copper is adopted to be that two probes produced by material, one of them probe is heated to 300 DEG C, metal material to be detected is spring steel 50CrVA, make the surface contact of the probe of heating and metal material to be detected, and form loop, detect and learn that the electromotive force in loop is 4.58mv.
Embodiments of the invention 4: the method for nondestructive rapid determining spring steel, copper is adopted to be that two probes produced by material, one of them probe is heated to 400 DEG C, metal material to be detected is spring steel 65Mn, make the surface contact of the probe of heating and metal material to be detected, and form loop, detect and learn that the electromotive force in loop is 5.51mv.
Embodiments of the invention 5: the method for nondestructive rapid determining spring steel, adopt copper to be that two probes produced by material, one of them probe is heated to 400 DEG C, and metal material to be detected is alloy high speed steel qW
18cr
4v, makes the surface contact of the probe of heating and metal material to be detected, and forms loop, detects the electric potential difference in tape loop is 4.56mv.
Embodiments of the invention 6: the method for nondestructive rapid determining spring steel, adopt copper to be that two probes produced by material, one of them probe is heated to 200 DEG C, and metal material to be detected is alloy high speed steel W
18cr
4v, makes the surface contact of the probe of heating and metal material to be detected, and forms loop, detects and learns that the electromotive force in loop is 2.16mv.
Embodiments of the invention 7: the method for nondestructive rapid determining spring steel, copper is adopted to be that two probes produced by material, one of them probe is heated to 250 DEG C, metal material to be detected is biphase titanium alloy TC19, make the surface contact of the probe of heating and metal material to be detected, and form loop, detect and learn that the electromotive force in loop is 2.21mv.
Embodiments of the invention 8: the method for nondestructive rapid determining spring steel, copper is adopted to be that two probes produced by material, one of them probe is heated to 250 DEG C, metal material to be detected is ni-base wrought superalloy GH4169, make the surface contact of the probe of heating and metal material to be detected, and form loop, detect and learn that the electromotive force in loop is 3.22mv.
Embodiments of the invention 9: the method for nondestructive rapid determining spring steel, copper is adopted to be that two probes produced by material, one of them probe is heated to 400 DEG C, metal material to be detected is ultralumin, make the surface contact of the probe of heating and metal material to be detected, and form loop, detect and learn that the electromotive force in loop is 6.41mv.
According to technical scheme of the present invention, spring steel and several conventional metal material are detected at different temperatures, result is as shown in table 1.
Table 1
In table 1, every detection numerical value is after test of many times, after removing the excessive value of drift, and the mean value fetched data.
Test data according to table 1 can be learnt, adopts technical scheme of the present invention, can spring steel and all the other conventional metal materials be distinguished fast and accurately.
Claims (1)
1. the method for a nondestructive rapid determining spring steel, it is characterized in that: adopt copper to be that two probes produced by material, one of them probe is heated to 200-400 DEG C, make the surface contact of the probe of heating and metal material to be detected, and form loop, electric potential difference in measure loop, when the electric potential difference in loop is 2.64-5.53mv, then determines that metal material to be detected is spring steel; The relation of electric potential difference in the temperature of probe and loop is, when probe is 200 DEG C, electric potential difference in loop is 2.64-2.66mv, when probe is 250 DEG C, electric potential difference in loop is 3.61-3.62mv, and when probe is 300 DEG C, the electric potential difference in loop is 4.56-4.58mv, when probe is 400 DEG C, the electric potential difference in loop is 5.51-5.53mv.
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| CN201310469578.7A CN103616396B (en) | 2013-10-10 | 2013-10-10 | The method of nondestructive rapid determining spring steel |
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| CN201310469578.7A CN103616396B (en) | 2013-10-10 | 2013-10-10 | The method of nondestructive rapid determining spring steel |
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| CN103616396A CN103616396A (en) | 2014-03-05 |
| CN103616396B true CN103616396B (en) | 2015-09-30 |
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| CN111859676B (en) * | 2020-07-23 | 2022-11-22 | 西南交通大学 | Intelligent detection method for damage of floating slab track steel spring |
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| CN2253831Y (en) * | 1995-12-11 | 1997-05-07 | 上海申佳铁合金有限公司 | On-site quick silicon content analyzer for trace carbon chrome iron furnace |
| JP5062753B2 (en) * | 2008-03-04 | 2012-10-31 | 公立大学法人大阪府立大学 | Method and apparatus for measuring the Seebeck coefficient and thermal conductivity of thin film samples |
| CN101354388B (en) * | 2008-09-02 | 2011-11-09 | 北京大学 | Method and system for measuring quasi one-dimensional nano-material Seebeck coefficient |
| CN101408523A (en) * | 2008-09-25 | 2009-04-15 | 上海第二工业大学 | Instant testing method of silicon content in ferrous alloy micro-carbon ferrochromium |
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Effective date of registration: 20190820 Address after: 550025 Mingzheng Building 220, West Campus of Guizhou University, Huaxi District, Guiyang City, Guizhou Province Patentee after: Guizhou Zhihui Craftsman Technology Co., Ltd. Address before: 550025 science and Technology Department, north campus, Guizhou University, Huaxi, Guizhou, China Patentee before: Guizhou University |
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