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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
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  • Abstract
  • Description
  • Claims
  • Application Information

AI 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 that can solve the problems of difficult smelting of nano-sheet-layer reinforced TiNi-based composite materials and uneven distribution and size of the reinforced phase.

Method used

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

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Experimental program
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specific Embodiment approach 1

[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 ob...

specific Embodiment approach 2

[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.

specific Embodiment approach 3

[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 alloy...

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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.

Description

technical field [0001] The invention relates to a preparation method of a base alloy composite plate, in particular to a preparation method of a nanosheet phase reinforced TiNi base alloy composite plate. Background technique [0002] With its excellent shape memory effect, superelasticity, and good biocompatibility, TiNi-based shape memory alloys have been widely used in aerospace, mechatronics, and biomedical fields. In recent years, composite materials based on TiNi shape memory alloys have shown many novel characteristics, which have attracted extensive attention of researchers and are expected to broaden the application range of shape memory materials. For example, nanowire or nanosheet NbTi-reinforced TiNi(Nb) composites exhibit low elastic modulus, high elastic limit, and yield strength; nanosheet W-reinforced TiNi composites have high yield strength and tunable phase transition Hysteresis and high X-ray visibility; compounding Ag into the TiNi matrix can endow the m...

Claims

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Application Information

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IPC IPC(8): B21B1/38B21B15/00C22F1/10C22F1/18
Inventor 佟运祥王玉王广超李莉郑玉峰
Owner HARBIN ENG UNIV
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