Accumulative roll-bonding preparation method of nanometer lamellar phase enhanced TiNi alloy composite plate

A technology of accumulative stacking and nano-sheets, which is applied in metal rolling, metal rolling, metal processing equipment, etc., can solve the difficulty of melting nano-sheet phase-reinforced TiNi-based composite materials, the distribution of reinforcement phases and the uneven size, etc. problems, to achieve the effect of low equipment requirements, easy regulation, and simple preparation process

Active Publication Date: 2015-11-04
HARBIN ENG UNIV
9 Cites 27 Cited by

AI-Extracted Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a method for preparing nanosheet-phase reinforced TiNi-based alloy composite plates by accumulative roll rolling...
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Abstract

The invention provides an accumulative roll-bonding preparation method of a nanometer lamellar phase enhanced TiNi alloy composite plate. The method comprises the following steps: (1) the acid washing and the cleaning are performed for the surface of a TiNi shape memory alloy foil; (2) the mechanical polishing and the surface cleaning are performed for an enhanced pure metal foil; (3) a pretreated TiNi alloy foil and the enhanced pure metal foil are alternately laminated; and the outermost layer is guaranteed to be the TiNi alloy foil; (4) the TiNi alloy foil and the enhanced pure metal foil are laminated in a stainless steel or pure Ti package for vacuumizing; (5) n passes of accumulative roll-bonding are performed at a temperature of 400-800 DEG C; and (6) the vacuum annealing treatment is performed in a temperature range of 300-600 DEG C. The method has such advantages as simple process, convenience for control, low equipment requirements and easy realization of batch production. The nanometer lamellar phase enhanced TiNi alloy composite plate, prepared by the method, can be widely applied to such places as medical instruments, damping components and large-strain-capacity drivers.

Application Domain

Technology Topic

Batch productionAlloy composite +13

Image

  • Accumulative roll-bonding preparation method of nanometer lamellar phase enhanced TiNi alloy composite plate
  • Accumulative roll-bonding preparation method of nanometer lamellar phase enhanced TiNi alloy composite plate
  • Accumulative roll-bonding preparation method of nanometer lamellar phase enhanced TiNi alloy composite plate

Examples

  • Experimental program(3)

Example Embodiment

Specific implementation mode one:
[0028] (1) Put the TiNi shape memory alloy foil in HF, HNO 3 And pickling in a mixed solution of deionized water.
[0029] (2) Polish the Nb foil with metallographic sandpaper to remove surface scale.
[0030] (3) The pickled TiNi shape memory alloy was ultrasonically cleaned in acetone for 15 minutes, and rinsed with alcohol.
[0031] (4) Alternately stack pickled TiNi-based shape memory alloys and Nb foils and ensure that the outermost layer is a TiNi-based alloy sheet, mechanically fix both ends of the stacked sheet, and use stainless steel on the surface of the fixed sheet wrapping.
[0032] (5) The plate obtained in step (4) is placed under the rolling mill for rolling, the rolling temperature is 400°C-800°C, the heat preservation time for plate heating before rolling is 400°C, and the rolling pass is no more than 32 positive Integer, the deformation amount of a single pass is 50%.
[0033] (6) Vacuum annealing the rolled sheet in the range of 300° C. to 600° C. to obtain a TiNi-based composite sheet reinforced with nanosheet layered Nb phase.

Example Embodiment

Specific implementation mode two:
[0034] The difference between this embodiment and Embodiment 1 is that the metal W foil is used in step (2) and step (4) in this embodiment.

Example Embodiment

Specific implementation mode three:
[0035] The difference between this embodiment and Embodiment 1 is that the metal Ag foil is used in step (2) and step (4) of this embodiment.
[0036] Finally, it should be noted that the stainless steel sheath in step (5) of the present invention can be replaced by a pure Ti sheath.
[0037] Advantages of the present invention are verified below by examples.
[0038] combine figure 1 , the technical route mainly includes:
[0039] (1) Change the composition to Ti 48.8 Ni 51.2 The shape memory alloy foil is placed in HF, HNO with a volume percentage of 1:2:10 3 And pickling in a mixed solution of deionized water, the final thickness of the foil is 0.6mm.
[0040] (2) Polish the Nb foil with metallographic sandpaper to remove the surface oxide skin, and the final thickness is 0.2 mm.
[0041] (3) The pickled TiNi shape memory alloy was ultrasonically cleaned in acetone for 15 minutes, and rinsed with alcohol.
[0042] (4) Alternately stack pickled TiNi shape memory alloys and Nb foils and ensure that the outermost layer is TiNi alloy. The number of stacked layers is 5 layers, which are covered and fixed with stainless steel. figure 2 It is a stacked schematic diagram of TiNi memory alloy and Nb foil, in which 1 is TiNi shape memory alloy and 2 is Nb foil. image 3 It is a schematic diagram of the package assembly structure, in which 3 is the upper cover plate, 4 is alternately stacked alloy plates, 5 is the package cover, and 6 is the lower cover plate.
[0043] (5) The sheathed plate is rolled by accumulative stack rolling technology, and rolled into a plate at a temperature of 600° C., and the rolling deformation in a single pass is 50%. Figure 4 It is a schematic diagram of 60% of cumulative rolling in a single pass.
[0044] (6) The rolled composite sheet was annealed in vacuum at 450° C. for 1 h to obtain a TiNi-based composite sheet reinforced with nanosheet-like Nb phase.
[0045] The elastic limit of the nanosheet layered Nb phase-reinforced TiNi-based composite plate obtained in this example can reach 5%, and the yield strength can reach more than 1.6 GPa, which is a composite material with great application value.
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PUM

PropertyMeasurementUnit
Yield strength>= 1.6GPa
tensileMPa
Particle sizePa
strength10

Description & Claims & Application Information

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