Machining method of nickel and titanium shape memory alloy wire

A technology of memory alloy wire and processing method, which is applied in the field of medical material processing, and can solve problems such as not being suitable for mass production, low efficiency, and poor stability

Inactive Publication Date: 2020-04-10
INNOVATIVE MATERIAL & DEVICES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This processing method can only be processed in a single mode, with low efficiency and poor stability, and is not suitable for mass production of this type of product

Method used

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  • Machining method of nickel and titanium shape memory alloy wire

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach 1

[0024] Grind one end of a nickel-titanium shape memory alloy wire 3 with a diameter of 2.0mm on the pay-off reel 1 into a tapered shape and pass it into a wire drawing die with a single deformation of 22%, and set the annealing temperature of the tubular resistance furnace 2 to 650°C. And stabilized at this temperature, then pass the finished nickel-titanium shape memory alloy wire 3 through the tubular resistance furnace 2, and fix it on the wire drawing machine 4 at the other end, perform online annealing and cold drawing to 1.0mm; Grind one end of the semi-finished 1.0mm nickel-titanium shape memory alloy wire 3 into a tapered shape and put it into a wire drawing die with a single deformation of 22%. Set the annealing temperature of the tubular resistance furnace 2 to 650°C and stabilize it at At this temperature, the finished nickel-titanium shape memory alloy wire 3 passes through the tubular resistance furnace 2, and is fixed on the wire drawing machine 4 at the other end...

specific Embodiment approach 2

[0026] Grind one end of a nickel-titanium shape memory alloy wire 3 with a diameter of 2.0mm on the pay-off reel 1 into a tapered shape and pass it into a wire drawing die with a single deformation of 18%, set the annealing temperature of the tubular resistance furnace 2 to 740°C, And stabilized at this temperature, then pass the finished nickel-titanium shape memory alloy wire 3 through the tubular resistance furnace 2, and fix it on the wire drawing machine 4 at the other end, perform online annealing and cold drawing to 1.0mm; Grind one end of the semi-finished product of the 1.0mm nickel-titanium shape memory alloy wire 3 that has been drawn into a tapered shape and penetrate it into a wire drawing die with a single deformation of 18%. Set the annealing temperature of the tubular resistance furnace 2 to 750°C and stabilize it at At this temperature, the finished nickel-titanium shape memory alloy wire 3 passed through the tubular resistance furnace 2, and fixed on the wire ...

specific Embodiment approach 3

[0028] Grind one end of a nickel-titanium shape memory alloy wire 3 with a diameter of 5.0 mm on the pay-off reel 1 into a tapered shape and pass it into a wire drawing die with a single deformation of 20%, and set the annealing temperature of the tubular resistance furnace 2 to 780°C. And stabilized at this temperature, then the nickel-titanium shape memory alloy wire 3 that has been molded is passed through the tubular resistance furnace 2, and fixed on the wire drawing machine 4 at the other end, for online annealing and cold drawing to 3.0mm; Grind one end of the semi-finished product of the drawn 3.0mm nickel-titanium shape memory alloy wire 3 into a tapered shape and put it into a wire drawing die with a single deformation of 20%, set the annealing temperature of the tubular resistance furnace 2 to 780°C, and stabilize At this temperature, the finished nickel-titanium shape memory alloy wire 3 passed through the tubular resistance furnace 2, and fixed on the wire drawing ...

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Abstract

The invention discloses a machining method of a nickel and titanium shape memory alloy wire. The method comprises the following steps that firstly, one end of the nickel and titanium shape memory alloy wire is milled into a cone shape and penetrates into a wire drawing mold with 0-40% deformation amount; secondly, the nickel and titanium shape memory alloy wire after penetrating the mold penetrates through a pipe type resistance furnace, the temperature is set between 600 DEG C and 800 DEG C, online annealing is carried out, and the wire is drawn to the specific size in a cold manner; and thirdly, the step one and the step two are repeated until the nickel and titanium shape memory alloy wire is drawn to the needed size. In addition, multiple pipe type furnaces and wire drawing machines are connected in series to use, and one-time forming of the nickel and titanium shape memory alloy wire can be achieved. The efficiency and the stability of drawing the nickel and titanium shape memoryalloy wire can effectively improved.

Description

technical field [0001] The invention relates to the field of medical material processing, in particular to a processing method of nickel-titanium shape memory alloy wire. Background technique [0002] Nickel-titanium alloys with nearly equiatomic ratios (nickel content between 49.0at% and 51.0at%) have aroused people's strong interest because of their special shape memory properties and superior superelasticity. Automobiles, electronics, instrumentation, construction, biomedicine and daily life, especially in the field of biomedicine have been widely used. In the actual application process, most of them use silk as raw material. Nickel-titanium shape memory alloy has characteristics such as shape memory, superelasticity and high work hardening rate, which make the cold working performance of the material low. At present, medical nickel-titanium alloy wire is mostly obtained by hot drawing. This processing method can only be processed in a single mode, with low efficiency a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21C1/02C22F1/10
CPCB21C1/02C22F1/10
Inventor 龙小平孙福俊刘洪锋
Owner INNOVATIVE MATERIAL & DEVICES
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