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

A technology of superplastic die forging and amorphous alloys, which is applied in metal processing equipment and other directions, can solve the problems of less research on superplastic forming of fine parts and no research reports on bulk amorphous alloys, so as to reduce the process flow. and process turnaround time, reduced forming pressure and sharp contours

Inactive Publication Date: 2005-05-04
UNIV OF SCI & TECH BEIJING
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  • Claims
  • Application Information

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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

The invention provides a superplastic die forging forming device and method for amorphous alloy precision parts. The device is composed of a vacuum furnace (1), a replaceable pressure head and a mold. The replaceable indenter is made up of inner indenter (2), outer indenter (3), slide block (4), connecting seat (5), and mold is made up of mold (7), ejection mechanism (8). The process is to place the blank and the mold in a vacuum furnace, and when the vacuum degree reaches 8×10 -3 Pa, start heating, heating rate 0.5 ~ 3.0 ℃ / s; heating temperature should be between Tg ~ Tx; forming strain rate range of 1 × 10 -2 ~5×10 -4 the s -1 . The advantage is that it is suitable for the forming of bulk amorphous alloy materials with large supercooled regions such as Zr-based, La-based, and Pd-based. The dimensional accuracy of the prepared parts is between ±0.1% and ±0.3%, and the surface is rough. The degree Ra is less than 0.8μm, and it can even reach the nanoscale mirror surface.

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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Patent Type & Authority Patents(China)
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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