Metal surface nanolizing method of supersonic wave high-energy surface machinery processing

A mechanical processing and metal surface technology, which is applied in the field of nano-coated metal parts, can solve the problems of unsatisfactory uniformity of the surface nano-crystalline layer, thin surface finish of the surface nano-layer, difficulty in recycling and reusing hard particles, etc. , to achieve the effect of good comprehensive mechanical properties, good combination and high strength

Active Publication Date: 2007-03-07
BAOSHAN IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The biggest advantage of this invention is that the shape and size of the workpiece that can be nano-processed are not limited, and its disadvantages are that it is difficult to recycle hard particles, the formed surface nano-layer is too thin and the surface finish is not high (if the process Improper control, supersonic particle bombardment may also cause erosion (erosion), resulting in varying degrees of damage to the workpiece)
Although this method is very simple and convenient, the size and shape of the metal parts that can be processed are limited, and the uniformity of the surface nanocrystalline layer formed is not ideal.

Method used

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  • Metal surface nanolizing method of supersonic wave high-energy surface machinery processing
  • Metal surface nanolizing method of supersonic wave high-energy surface machinery processing
  • Metal surface nanolizing method of supersonic wave high-energy surface machinery processing

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] Embodiment 1: Aluminum alloy plate, the surface to be treated is a rectangular plane.

[0054] After conventional mechanical processing, the aluminum alloy plate is fixed on the stand and remains still. The ultrasonic high-energy surface machining device is an outsourced part (the same below). The ultrasonic transducer of the device is installed on the manipulator, and the spherical punch of the transducer is perpendicular to the surface to be processed and performs two-dimensional reciprocating linear motion until all the surfaces to be processed are processed once. The specific process parameters are listed in Table 1.

[0055] Calculated by X-ray measurement (Figure 2) and Scherrer equation (Scherrer-Wilson equation) [X-rayDiffraction Procedures for Polycrystalline and Amorphous Materials, 2nd Ed., New York: Wiley, (1974) 662], the surface after surface nano-treatment The average grain size of the layer (about 5 μm deep) is also listed in Table 1, and the depth of ...

Embodiment 2

[0056] Embodiment 2: An aluminum alloy disc of Φ300mm, the surface to be treated is the disc surface (plane).

[0057] The aluminum alloy plate is fixed horizontally on the stand after conventional machining. The transducer of the ultrasonic high-energy surface machining device is fixed on the manipulator, and the spherical punch is perpendicular to the surface to be processed and performs reciprocating linear motion until all the surfaces to be processed are processed twice. The specific process parameters are listed in Table 1, in which the amplitude of the punch is controlled between 25-30 μm and 5-10 μm in the first pass and the second pass, respectively, and the moving linear speed of the manipulator is between 70-90 mm / min. Between and 40 ~ 50mm / min.

[0058] Through X-ray measurement (Figure 3) and Scherrer-Wilson equation calculation, the average grain size of the surface layer (about 5 μm deep) after surface nano-treatment is listed in Table 1, and the depth of the n...

Embodiment 3

[0059] Example 3: A 40Cr steel shaft with a diameter of Φ25mm, the surface to be treated is the cylindrical surface of the shaft.

[0060] After quenching and tempering (quenching + high temperature tempering) and conventional mechanical processing, the 40Cr steel shaft is clamped on a high-speed rotary device for rotational movement. The transducer of the ultrasonic high-energy surface machining device is fixed on the manipulator, and the punch is perpendicular to the cylindrical surface to be processed and moves linearly along the axis until all the surfaces to be processed are processed once. The specific process parameters and the average grain size of the surface layer after surface nano-treatment are listed in Table 1.

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Abstract

the invention discloses a realizing method of nanometer metal non-coating surface through ultrasonic mechanic manufacturing, which is characterized by the following: contacting plunger chip on the ultrasonic energy exchanger with metal sample directly; controlling the relative position, relative moving pattern and speed of ultrasonic exchanger and metal sample; selecting or controlling the geometrical shape, amplitude, ultrasonic frequency and power of plunger chip; inputting the ultrasonic vibrating energy into the metal piece; deforming local metal surface to obtain the product.

Description

(1) Technical field [0001] The invention relates to a method for forming a nanocrystalline layer (surface nanometerization) on the surface of a metal piece, in particular to a method for realizing nanometerization of the non-coated surface of a metal piece by ultrasonic high-energy surface machining. (2) Background technology [0002] Grain refinement improves the toughness of metals while increasing strength. With the emergence of nanotechnology, it has become a reality to refine the grains of metal bulk to the nanometer level (<100nm) in the laboratory. A large number of studies have revealed that nanocrystalline metal materials do have unique properties, including excellent mechanical properties such as high strength, high hardness and good toughness. However, there are two outstanding problems in the application of nanocrystalline metal structure materials: [0003] (1) When the grain diameter is less than 1 μm (submicron level, the grain diameter is between 1 μm an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21D1/09
Inventor 宋洪伟张俊宝史弼
Owner BAOSHAN IRON & STEEL CO LTD
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