Micro fine-grained titanium-nickel-niobium shape memory alloy block material preparing method

Abstract

The invention is a manufacturing method for a kind of micron tiny crystal titanium nickel-niobium shape memorizing alloy block materials, 45%-50% titanium, 40%-45% nickel, 5%-10% niobium are melted and produced into titanium nickel-niobium alloy cast ingot, and cuts the titanium nickel-niobium alloy block material into blank, and carries on surface finish process, and paints with glass lubricate, uses isometric curved squeezing mould with 90-120 degrees channel angle, the mould cavity surface is painted with black lead lubricate, the blank and mould are heated and carries on temperature reservation, and takes them out to be squeezed at the same time, finally gets the product. The invention solves the problem that the bad plastic property of titanium nickel-niobium shape memorizing alloy in room temperature, enhances the alloy mechanical performance, and lowers the cost.

Description

Technical field:

[0001] The invention relates to a method for preparing a micron fine-grained titanium-nickel-niobium (TiNi-Nb) shape memory alloy bulk material, which is used to obtain a titanium-nickel-niobium alloy bulk material that improves the low-temperature plasticity, strength and shape memory performance of the shape memory alloy, Further, the practical engineering application value of the shape memory alloy in the fields of aerospace, medical care and civil industry is improved. It belongs to the technical field of metal materials and metallurgy. Background technique:

[0002] Since its appearance in the early 1970s, shape memory alloys have been widely valued by the material industry and have shown great application prospects in civil industry, aerospace, nuclear industry, biomedicine and other fields. TiNi-Nb alloys have many excellent properties, such as: good mechanical properties (high specific strength, good thermal strength, high fatigue strength), extreme...