Nickel titanium niobium negative thermal expansion alloy and method of producing the same

A negative thermal expansion, nickel-titanium-niobium technology, applied in the field of alloys, can solve problems such as negative thermal expansion characteristics of metal materials, achieve good thermal shock resistance, and avoid deformation.

Inactive Publication Date: 2008-09-24
XIAMEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] So far, no metallic material has negative thermal expansion characteristics

Method used

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  • Nickel titanium niobium negative thermal expansion alloy and method of producing the same
  • Nickel titanium niobium negative thermal expansion alloy and method of producing the same
  • Nickel titanium niobium negative thermal expansion alloy and method of producing the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Example 1: Preparation of Ti with a reduction of 9% at room temperature 46.3 Ni 44.7 Nb 9 Cold rolled block

[0021] 46.3% titanium with a purity of 99.9%, 44.7% nickel with a purity of 99.5%, and 9% niobium with a purity of 99.9% were weighed. Put the above-mentioned titanium, nickel and niobium raw materials into a non-consumable vacuum electric arc furnace, and evacuate to 6×10 -3 Pa, filled with high-purity argon to 0.7×10 5 Pa, and then repeated smelting at 2800°C for 5 times to obtain a nickel-titanium-niobium negative thermal expansion alloy ingot. The nickel-titanium-niobium negative thermal expansion alloy ingot obtained above is hot-rolled at 850° C. into block shape. Cut the NiTiNb bulk alloy obtained above into plate shape by wire cutting method, put it into a vacuum heat treatment furnace for heat treatment, and the vacuum degree is 5×10 -3 Pa, after heat treatment at 850°C for 24 hours, cool in air. The alloy block was subjected to cold rolling in t...

Embodiment 2

[0023] Example 2: Preparation of Ti with a reduction of 7% at liquid nitrogen temperature 44 Ni 47 Nb 9 Cold rolled block

[0024] 44% titanium with a purity of 99.9%, 47% nickel with a purity of 99.5%, and 9% niobium with a purity of 99.9% were weighed. Put the above-mentioned titanium, nickel and niobium raw materials into a non-consumable vacuum electric arc furnace, and evacuate to 3×10 -3 Pa, filled with high-purity argon to 0.6×10 5 Pa, and then repeated smelting at 2500°C for 6 times to obtain a nickel-titanium-niobium negative thermal expansion alloy ingot. The nickel-titanium-niobium negative thermal expansion alloy ingot obtained above is hot-rolled at a temperature of 950° C. into a block. Cut the NiTiNb bulk alloy obtained above into plate shape by wire cutting method, put it into a vacuum heat treatment furnace for heat treatment, and the vacuum degree is 4×10 -3 Pa, after heat treatment at 950°C for 24 hours, cool in air. The alloy block is subjected to co...

Embodiment 3

[0026] Example 3: Preparation of Ti with a reduction of 3% at room temperature 42 Ni 40 Nb 18 Cold rolled block

[0027] 42% titanium with a purity of 99.9%, 40% nickel with a purity of 99.5%, and 18% niobium with a purity of 99.9% were weighed. Put the above-mentioned titanium, nickel and niobium raw materials into a non-consumable vacuum electric arc furnace, and evacuate to 5×10 -3 Pa, filled with high-purity argon to 0.6×10 5 Pa, and then repeated smelting at 2700°C for 6 times to obtain a nickel-titanium-niobium negative thermal expansion alloy ingot. The nickel-titanium-niobium negative thermal expansion alloy ingot obtained above is hot-rolled at a temperature of 900° C. into a block. Cut the NiTiNb bulk alloy obtained above into plate shape by wire cutting method, put it into a vacuum heat treatment furnace for heat treatment, and the vacuum degree is 2×10 -3 Pa, after heat treatment at 900°C for 48 hours, cool in air. The alloy block was subjected to cold rolli...

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Abstract

The invention discloses a negative thermal expansion alloy of Nickel-Titanium-Niobium and a preparation method thereof, relates to an alloy in particular to a negative thermal expansion alloy of Nickel-Titanium-Niobium and a preparation method thereof. The invention provides a negative thermal expansion alloy of Nickel-Titanium-Niobium which has negative thermal expansion characteristics in a wider temperature range and a preparation method. The component and the content in atom percentage is 40 to 49 percent of Nickel, 42 to 50 percent of Titanium and 1 to 18 percent of Niobium. The raw material of Nickel, Titanium and Niobium are added in furnace, the furnace is vacuumed and filled with Argon, and the Nickel-Titanium-Niobium alloy ingot is obtained after melting in 2500 to 2900 DEG C; the Nickel-Titanium-Niobium alloy ingot is hot-rolled to bulk alloy in 800 to 950 DEG C; the bulk alloy obtained is packaged in a quartz tube for heat treatment in the temperature of 800 to 950 DEG C and cooled in air. The bulk alloy after cooling is cool-rolled in 3 to 15 percent of the rolling reduction along the same direction and consequently the negative thermal expansion alloy of Nickel-Titanium-Niobium is obtained.

Description

technical field [0001] The invention relates to an alloy, in particular to a nickel-titanium-niobium (NiTiNb) negative thermal expansion alloy material and a preparation method thereof. Background technique [0002] The relatively mature negative thermal expansion materials that have been developed so far are mainly ceramic materials, such as glass-ceramics, oxide ceramics (tungstate, molybdate, chromate, etc.) and multi-component magnetic compounds. Some metal materials have a small coefficient of thermal expansion, such as Invar, but cannot obtain negative thermal expansion. From the perspective of material practicability, metal materials have the advantages of good toughness, machinability, and impact load resistance. Therefore, it is meaningful to research and develop metal-based negative thermal expansion materials (see literature: 1. , Su Zhimei, Preparation technology and structural characteristics of β-eucryptite negative expansion glass ceramics, Functional Materia...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C14/00C22C30/00C22C1/02C22F1/18C22F1/16B21B37/74B21B37/58
Inventor 马云庆江惠芳杨水源金万军张锦彬黄艺雄施展王翠萍刘兴军
Owner XIAMEN UNIV
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