Processing method of nickel-titanium shape memory alloy high-strength wire material

Abstract

The invention discloses a processing method of a nickel-titanium shape memory alloy high-strength wire material. The processing method comprises the following steps that (1), a nickel-titanium alloy wire blank is subjected to peeling treatment, and the nickel-titanium alloy thick wire material is obtained; (2), the nickel-titanium alloy thick wire material in the first step is subjected to hot drawing, and the thick wire material in the nickel-titanium alloy is obtained; and (3), high-temperature annealing and water quenching are carried out on the thick wire material in the nickel-titanium alloy in the second step; (4), cold drawing and on-line annealing treatment are carried out on the thick wire material in the high-temperature annealed and water-quenched nickel-titanium alloy obtainedin the third step, and the nickel-titanium alloy fine wire material is obtained; and (5), on-line aging treatment and peeling treatment are carried out on the nickel-titanium alloy fine wire materialobtained in the fourth step, and the nickel-titanium shape memory alloy high-strength wire material is obtained.

Description

technical field [0001] The invention belongs to the technical field of alloy wire processing, in particular to a method for processing nickel-titanium shape memory alloy high-strength wire. Background technique [0002] Nickel-titanium shape memory alloy is an intermetallic compound with nearly equal atomic ratio. The alloy has different crystal structures at different temperatures. The high-temperature phase is a body-centered cubic structure with high hardness and rigidity; the low-temperature martensite is monoclinic Structure, low hardness, and the alloy undergoes martensite and austenite phase transformation with temperature changes. The high-temperature phase of nickel-titanium alloy has excellent wear resistance and corrosion resistance, and the low-temperature phase has excellent damping properties. It has a unique shape memory effect and superelasticity in the phase transition region, and also has excellent biocompatibility. It is a kind of Ideal medical biomateria...

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Problems solved by technology

[0005] The object of the present invention is to overcome above-mentioned deficiencies in the prior art, provide a kind of nickel-titanium shape memory alloy high-strength wire material processing method, overcome 1 in the prior art: the processing method of hot drawing of fixed mold is nickel-titanium alloy under high temperature The surface of the wire material is seriously polluted, and repeated heating causes poor overall performance, low strength, and poor toughness; 2: The processing method of fixed die cold drawing has serious work hardening of nickel-titanium alloy materials. In order to prevent wire breakage, repeated heating and annealing is required. The secondary production efficiency is low, and the residual strain is large; 3: The existing technology does not have the technical inspiration of combining the two processing methods and the specific operation method.

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