Method for manufacturing pipeline assembly from shape memory alloy

A technology of memory alloy and pipeline, which is applied in the field of pipeline components made of shape memory alloy, can solve the problems that cannot meet the high performance index of memory alloy pipe joints, achieve high hardenability and resistance, increase strength and recovery rate, The effect of improving the strength of the material

Active Publication Date: 2018-11-02
江苏华晨气缸套股份有限公司
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Problems solved by technology

[0005] The technical problem to be solved by the present invention is: In order to solve the problem in the prior art that the high-performance index of the memory alloy pipe joint cannot be satisfied under t

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  • Method for manufacturing pipeline assembly from shape memory alloy
  • Method for manufacturing pipeline assembly from shape memory alloy
  • Method for manufacturing pipeline assembly from shape memory alloy

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Embodiment Construction

[0021] 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.

[0022] The present invention is a method for manufacturing a pipeline assembly using a shape memory alloy, which comprises the following steps:

[0023] 1) Preheat the shape memory alloy sample. The preheating temperature is 400°C for 30 minutes, and 860°C for 20 minutes;

[0024] Among them, the shape memory alloy sample adopts 99.96% sponge titanium, 99.96% pure nickel and 99.96% pure niobium, according to the ratio of Ni47-Ti44-Nb9 (this composition ratio is known, and the alloy formed by other ratios has no Shape memory performance, so it is impossible to make shape memory pipeline components, so this method is limited to Ni47-Ti44-Nb9) configuration.

[0025] A...

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Abstract

The invention relates to a method for manufacturing a pipeline assembly from shape memory alloy. The method adopts an equal-diameter bending extrusion mould to form an equal-diameter bending extrusionmethod for processing the shape memory alloy; the method can realize large shearing deformation of a test sample under relatively low load and relatively load stress in case of not changing the crosssection area of the material; in a deforming process, crystalline grains are greatly refined by processing and hardening, dynamic recovery and re-crystallizing of block materials; and finally, a sub-microcrystal or nano structure is finally formed, so that the material strength is improved; and according to the research, the strength and the recovery rate of iron-based shape memory alloy can be remarkably improved by ECAP deformed refined crystalline grains. Therefore, the method belongs to the technical field of metal material refining.

Description

technical field [0001] The invention belongs to the technical field of finishing metal materials, and in particular relates to a method for manufacturing pipeline components using shape memory alloys. Background technique [0002] Due to the narrow hysteresis of traditional NiTi alloys and NiTiFe alloys widely used in engineering (usually 30-50°C), they must be stored in a special temperature environment during transportation. Many researchers have attempted to improve the phase transition hysteresis of shape memory alloys. [0003] NiTiNb shape memory alloy is a new type of practical engineering memory alloy developed after 1986. The phase transition hysteresis (As-Ms) of the alloy is as high as 150°C, which is significantly wider than other shape memory alloys. The pipe joints made of it can be stored and transported at room temperature without being stored in liquid nitrogen, which greatly reduces storage and Application cost; the shape recovery can be completed by heat...

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Application Information

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IPC IPC(8): B21C37/04B21C23/08B21C23/00B21C29/00B21C25/02C22F1/10
Inventor 刘俊伟赵志刚王明泉刘久万高金刚曾慧敏张加中戚娟娟
Owner 江苏华晨气缸套股份有限公司
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