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Amorphous alloy precision parts superplastic drop-forging shaper and method thereof

A technology of superplastic die forging and amorphous alloys, applied in metal processing equipment, etc., can solve the problems of less research on superplastic forming of fine parts and no research reports on large amorphous alloys, so as to reduce the process flow and process turnaround time, reduced forming pressure, dimensional stability and precise results

Inactive Publication Date: 2003-11-19
UNIV OF SCI & TECH BEIJING
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Problems solved by technology

[0005] On the other hand, there are few researches on superplastic forming of fine parts in China, and there are no relevant research reports on superplastic forming of large amorphous alloys.

Method used

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  • Amorphous alloy precision parts superplastic drop-forging shaper and method thereof
  • Amorphous alloy precision parts superplastic drop-forging shaper and method thereof
  • Amorphous alloy precision parts superplastic drop-forging shaper and method thereof

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Embodiment Construction

[0014] The forming object is used on an instrument such as attached figure 2 For the spur gear with hub shown, the hub wall thickness is 1mm, the inner hole diameter is φ2.6mm, the dimensional tolerance is 0~+0.01mm, the surface roughness is 1.6μm; the addendum circle diameter is φ6.5mm, and the dimensional tolerance is -0.02~ 0mm, tooth surface roughness 1.6μm. The part is required to have high strength, high wear resistance and high corrosion resistance. For this purpose, Zr with a diameter of φ5mm is used 41.25 Ti 3.75 Cu 12.5 Ni 10 be 22.5 Large amorphous alloy rods are used as forming materials (compression yield strength at room temperature is greater than 1.9GPa, and Vickers hardness is greater than 5.0GPa) for superplastic forming. The forming temperature is 380~395℃, the strain rate is 1×10 -3 ~5×10 -4 the s -1 . The forming process is carried out in two steps: the first step is to use the integral flat punch to make the metal initially fill the tooth shape...

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Abstract

A superplastic die forging apparatus for forming precise non-crystal alloy part is composed of vacuum heater, exchangeable pressing head consisting of internal and external pressing heads, slide block and jointer, and die comprising main body and ejector. Its technology features that the blank and die must at first be heated in the vacuum heater by defined parameters. Its advantage is high precision and surface finish quality.

Description

Technical field: [0001] The invention belongs to the technical field of forming new amorphous alloy materials, and in particular provides a superplastic die forging forming device and method for amorphous alloy precision parts. It can be used in the forming of bulk amorphous alloys with large supercooled regions such as Zr-based, La-based, and Pd-based alloys. technical background: [0002] Precision forming technology is a very important part of advanced manufacturing technology. It is the key technology of many national defense and civilian cutting-edge products. It has a major impact on improving a country's industrial competitiveness and national defense security [Li Minxian et al. Frontiers of Precision Forming Technology Development. China Machinery Engineering, 2000, 11(1-2): 183-186]. Fine parts, especially parts with three-dimensional complex shapes, can be prepared by precision casting, precision plastic forming or injection molding. Generally speaking, the minim...

Claims

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Application Information

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IPC IPC(8): B21J1/06B21J5/02
Inventor 谢建新张志豪周成刘新华
Owner UNIV OF SCI & TECH BEIJING
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