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Amorphous alloy hot extrusion device and method

A technology of amorphous alloy and hot extrusion, which is applied in the direction of metal extrusion, metal extrusion die, metal extrusion control equipment, etc., can solve the difficulty in preparing large-scale amorphous alloy products and the lack of mature and quantitative methods for amorphous alloys Problems such as theory and extrusion temperature are difficult to control, so as to achieve the effect of low density, low density and fast molding speed

Active Publication Date: 2017-03-22
SHANDONG UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, there are two problems in the application of amorphous alloys: one is the limitation of product size, there is no mature and quantitative theory for the composition design of amorphous alloys, and it is very difficult to prepare large-sized amorphous alloy products that meet engineering needs
The extrusion force of the method is too small, and the extrusion temperature is difficult to control

Method used

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  • Amorphous alloy hot extrusion device and method
  • Amorphous alloy hot extrusion device and method
  • Amorphous alloy hot extrusion device and method

Examples

Experimental program
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Effect test

Embodiment 1

[0077] in Zr 68 Cu 12 Ni 9 Ti 8 be 3 The supercooled liquid phase region (355°C-445°C) and the conventional extrusion temperature of 7075 aluminum alloy (250°C-550°C) select a temperature of 440°C, for Zr of Φ10mm×5mm 68 Cu 12 Ni 9 Ti 8 be 3 Amorphous alloy and Φ10mm×5mm 7075 aluminum alloy were co-hot extruded at an extrusion rate of 3mm / min to achieve Zr 68 Cu 12 Ni 9 Ti 8 be 3 Joining of zirconium-based amorphous and 7075 aluminum alloy.

[0078] Select Example 1 as a representative example, carry out macroscopic morphology analysis, XRD, 1000 times magnification observation under EPMA, and EPMA-DES component analysis on the molded workpiece obtained by hot extrusion connection of zirconium-based amorphous and 7075 aluminum alloy, the results are as follows Figure 4 to Figure 7 shown.

[0079] Figure 4 This is the macro-morphology diagram of the zirconium-based amorphous / 7075 aluminum alloy connector prepared in Example 1. It can be seen that the longitudin...

Embodiment 2

[0084] in Zr 55 Al 10 Ni 5 Cu 30 Among the supercooled liquid phase region (409.7°C-493.7°C) and the conventional extrusion temperature of 7075 aluminum alloy (250°C-550°C), the selected temperature is 485°C, for Zr of Φ10mm×5mm 55 Al 10 Ni 5 Cu 30 The co-hot extrusion of amorphous alloy and Φ10mm×10mm7075 aluminum alloy at the extrusion rate of 4mm / min realized the Zr 55 Al 10 Ni 5 Cu 30 Joining of zirconium-based amorphous and aluminum alloys.

[0085] The amorphous part maintains a good amorphous state, no intermetallic compound is found in the bonding part, the bonding interface is smooth, and the element diffusion in the bonding region is obvious.

Embodiment 3

[0087] in Zr 68 Cu 12 Ni 9 Ti 8 be 3 Among the supercooled liquid phase region (355°C-445°C) and the conventional extrusion temperature of AZ31B magnesium alloy (300°C-450°C), the selected temperature is 440°C, and the Zr of Φ10mm×5mm 68 Cu 12 Ni 9 Ti 8 be 3 The amorphous alloy and the AZ31B magnesium alloy of Φ10mm×15mm were co-hot extruded at the extrusion rate of 2mm / min, and the connection of the zirconium-based amorphous and the AZ31B magnesium alloy was realized.

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Abstract

The invention discloses an amorphous alloy hot extrusion device and method. The device comprises a female die and a male die. An extrusion cavity is formed in the female die. The female die is provided with an electric heating element outside the extrusion cavity. The extrusion cavity is made communicated with a forming cavity in a set shape. The size of the forming cavity is smaller than that of the extrusion cavity. The forming cavity is made communicated with the outside world or made communicated with the outside world through a guide sleeve. The male die and the female die are matched in the extrusion cavity to extrude amorphous alloy and heterogeneous alloy, forming is carried out on the amorphous alloy and the heterogeneous alloy through the forming cavity, longitudinal connection of the amorphous alloy and the heterogeneous alloy / magnesium alloy is achieved, the application size range of the amorphous alloy is enlarged, and optimal combination of the ductility and toughness of the aluminum / magnesium alloy and high wear and corrosion resistance of the amorphous alloy can be achieved in space. The extrusion temperature is within the amorphous alloy supercooled liquid phase region and heterogeneous aluminum / magnesium alloy conventional hot extrusion temperature range, both the amorphous alloy and the heterogeneous alloy are in a low-stress superplasticity state, extrusion force can be reduced, and interface combination is promoted.

Description

technical field [0001] The invention relates to the field of amorphous alloy connection, in particular to an amorphous alloy hot extrusion device and method. Background technique [0002] Amorphous alloys are a major discovery in the field of materials in the 20th century. The atomic arrangement inside the material is a long-range disordered short-range order structure, without defects such as dislocations and grain boundaries. This unique structure makes amorphous alloys have high strength, superplasticity, high elasticity, high hardness, high wear resistance and high corrosion resistance. It has broad application prospects in aerospace, precision instruments, biomedicine and other fields. [0003] However, there are two problems in the application of amorphous alloys: one is the limitation of product size, there is no mature and quantitative theory for the composition design of amorphous alloys, and it is very difficult to prepare large-sized amorphous alloy products that...

Claims

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Application Information

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IPC IPC(8): B21C23/22B21C25/02B21C29/00B21C31/00
CPCB21C23/002B21C23/22B21C25/02B21C29/003B21C31/00
Inventor 李辉平蒋芮刘海娟侯弘历贺连芳张春芝
Owner SHANDONG UNIV OF SCI & TECH
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