Ultralow-temperature tensile test device and method for ship material

A tensile test, ultra-low temperature technology, used in measuring devices, analyzing materials, and testing the strength of materials by applying stable tension/pressure, to solve the problems of sample loading and unloading and cooling, improve ship construction quality, and ensure reliability.
CN114136802APending Publication Date: 2022-03-04HUDONG ZHONGHUA SHIPBUILDINGGROUP
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Applications(China)
Current Assignee / Owner
HUDONG ZHONGHUA SHIPBUILDINGGROUP
Publication Date
2022-03-04

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Abstract

The invention discloses an ultralow-temperature tensile test device and method for ship materials, the device comprises a main body frame, a stress mechanism, a storage barrel, an upper connecting sleeve and a lower connecting sleeve, the upper connecting sleeve is arranged on the main body frame, the lower connecting sleeve is mounted on the stress mechanism, and the stress mechanism is arranged on the storage barrel. A to-be-tested sample is mounted between the upper connecting sleeve and the lower connecting sleeve, is provided with a low-temperature extensometer, and is immersed into a storage barrel. According to the invention, the tensile test can be accurately and quickly carried out on the ultralow-temperature material, and the real mechanical properties such as ultralow-temperature yield strength, tensile strength, percentage elongation after fracture, percentage reduction of area and the like of the ultralow-temperature material are reflected, so that the strength and toughness of the ultralow-temperature material in an ultralow-temperature environment are verified and are used as a basis for checking and accepting the ultralow-temperature material; the material use reliability is ensured, and the ship building quality is improved.
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Description

technical field

[0001] The invention belongs to the technical field of shipbuilding, and in particular relates to a device and method for ultra-low temperature tensile testing of ship materials. Background technique

[0002] In recent years, with the increase in the number of ships sailing in ice regions and liquefied natural gas ships, low-temperature and ultra-low temperature materials have gradually become popular. These materials need to meet the requirements of maintaining sufficient strength at ultra-low temperatures, not easily deformed, and have certain toughness requirements . Therefore, the corresponding low temperature detection requirements also follow.

[0003] Among the low-temperature mechanical performance testing projects currently carried out, the low-temperature and ultra-low temperature impact projects are very mature, while the low-temperature and ultra-low temperature stretching projects have just emerged and have not yet been popularized. The testing ...

Claims

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