Method for establishing gradient temperature field

A technology for establishing a method and a temperature field, which is applied in the field of fracture resistance testing of metal materials, can solve problems such as unpublished patents and unpublished reports, and achieve the effects of ensuring effectiveness, convenient operation, and airtightness

Active Publication Date: 2017-05-31
725TH RES INST OF CHINA SHIPBUILDING INDAL CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In the test, in order to realize the process of crack initiation, propagation and crack arrest, it is necessary to establish a gradient temperature field in the sample. For this technology, there is no public report or corresponding patent release.

Method used

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  • Method for establishing gradient temperature field
  • Method for establishing gradient temperature field
  • Method for establishing gradient temperature field

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Experimental program
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Embodiment Construction

[0032] In the gradient temperature ESSO test, whether the gradient temperature field can meet the requirements of the standard specification will directly affect the validity of the test. The present invention mainly designs the establishment technology of the gradient temperature field based on this requirement.

[0033] During the gradient temperature ESSO test, in order to form a gradient temperature field in the sample, it is necessary to cool one end of the sample and heat the other end at the same time; in order to ensure the validity of the results, the surface temperature field on both sides of the sample should be the same ; In addition, effective measurement of the temperature field should also be achieved. The solution adopted by the present invention for the technical problems in the above three aspects is: use a low-temperature tank and a cooling medium to cool the notch of the sample, in addition to forming the cold end of the gradient temperature field, it can al...

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Abstract

The invention relates to a cryogenic device used by a method for establishing a gradient temperature field. The cryogenic device used by the method consists of two same low-temperature blocks, a top block having a width the same as that of a sample, and a fastening mechanism, wherein the top block is arranged between the two low-temperature blocks, and the two low-temperature blocks are symmetrically arranged at a V-shaped nick; the fastening mechanism is used for clamping the top block so as to enable the top block to be jointed with the surfaces of two sides of the sample; the surfaces of one sides, jointed with the sample, of the low-temperature blocks are respectively provided with a concave-shaped cryostat; long-strip-shaped parts at the lower ends of the cryostats are used for cooling a V-shaped groove. The method can meet the demands of smoothly starting the cracking of brittle cracks at the nick part and establishing the gradient temperature field, and lays a foundation for the validity test of a crack-arrest property.

Description

technical field [0001] The invention relates to a technique for establishing a gradient temperature field in an ESSO test, and belongs to the technical field of fracture resistance testing of metal materials. Background technique [0002] Since the beginning of the 21st century, in order to improve efficiency and reduce operating costs, the development of container ships has become increasingly large-scale and super-large. At present, 19,000 TEU container ships have been put into operation, and 20,000 TEU container ships have entered the stage of actual ship construction. . With the large-scale and ultra-large structures, in order to meet the rigidity and strength requirements, the strength grade and plate thickness specifications of the steel plates used in the hull structure are also increasing. The highest strength level has reached 460MPa, and the maximum plate thickness specification is approaching 100mm. With the increase of the strength and the increase of the plate ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N1/42
CPCG01N1/42
Inventor 宫旭辉薛钢李冲高珍鹏马骞
Owner 725TH RES INST OF CHINA SHIPBUILDING INDAL CORP
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