Nanolizing method for metal material surface

A metal material and nanotechnology, which is applied in the field of solid-liquid two-phase jet impacting the surface of metal materials, can solve the problems of processing, metal parts and large-plane metal equipment that cannot be nano-sized, and achieve low energy consumption and low cost. The effect of low cost and high production efficiency

Inactive Publication Date: 2003-11-26
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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Problems solved by technology

[0003] The nanometerization of metal material surfaces is a new field that has started in recent years. The Chinese patent application (application number: 99122670.4) "A Method for Preparation of Metal Material Surface Nanolayers" uses the high-frequency vibration (~20kHz) of an ultrasonic generator as the driving force. , the hard material

Method used

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  • Nanolizing method for metal material surface
  • Nanolizing method for metal material surface
  • Nanolizing method for metal material surface

Examples

Experimental program
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Example Embodiment

[0023] Example 1

[0024] The surface nanometerization device adopts Kranzle high-pressure cleaner 3250TST or 3270TST from Shanghai Hanover Trade Development Co., Ltd., such as figure 1 As shown, the solid phase tube 1 and the liquid phase tube 2 are joined to the nozzle 3, the solid phase tube 1 is connected to the pill feeder, and the liquid phase tube 2 is connected to the high-pressure water generator. The engine power is 7.5KW, and the base material is 316L. Stainless steel test piece, hard particles are made of Al 2 O 3 (Around 500 microns);

[0025] The high-pressure water generated by the high-pressure water generator is used to generate a solid-liquid two-phase jet through the nozzle 3 to carry hard particles (spherical) to continuously bombard the surface of the matrix material 4 at a speed of 700 m / s to make it nanometer. The surface nanometerization process parameters are as follows:

[0026] The spraying distance is 500mm, the water pressure is 22MPa, the water flow ...

Example Embodiment

[0027] Example 2

[0028] The difference from Example 1 is:

[0029] The particles are made of steel balls (0.5~1mm), and the process parameters are as follows:

[0030] The spraying distance is 300mm, the water pressure is 25MPa, the water flow is 15 l / min, the solid-liquid dual-phase jet velocity is 750m / s, and the bombardment time is 4 minutes. The nanophase is formed on the surface observed by transmission electron microscope. The TEM bright field image after sample treatment, dark See the field image and diffraction ring separately Figure 5 , 6 , 7.

Example Embodiment

[0031] Example 3

[0032] Difference from Example 1:

[0033] The base material is 20# steel test piece, the particles are steel balls (about 4mm), and the process parameters are as follows:

[0034] The spraying distance is 800mm, the water pressure is 30MPa, the water flow is 11 l / min, the solid-liquid dual-phase jet velocity is 900m / s, and the bombardment time is 4 minutes. The nanophase is formed on the surface observed by transmission electron microscope. The TEM bright field image after sample treatment, dark See the field image and diffraction ring separately Figure 8 , 9 , 10.

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Abstract

The present invention relates to the nano treatment of metal material surface and is especially the nano treatment of metal material surface through solid-liquid double-phase jet impact. High pressure liquid produced by the high pressure liquid generator is sprayed via nozzle to form solid-liquid double-phase jet carrying hard particles to bombard the surface of metal material for nano treatment,and the technological parameters include jet distance 10-10000 mm, liquid pressure 10-30 MPa, liquid flow rate 11-22 L/min and hard particle diameter 50 nm to 5 mm. The present invention has wide application range, can treat workpiece with complicated shape and large plane and form homogeneous nano layer.

Description

technical field [0001] The invention relates to the field of metal material surface nanometerization, in particular to a method for solid-liquid two-phase jet impacting metal material surface nanometerization. Background technique [0002] The failure of materials mostly occurs on the surface of the material, and the structural properties of the surface directly affect the comprehensive service performance of the material. The nanometerization of metal material surface is very important to improve the service life of metal parts. The use of surface nanotechnology to improve the surface structural properties of metal materials, especially fatigue performance, corrosion performance and friction and wear properties, can improve the comprehensive service performance of metal materials and prolong the service life of materials. [0003] The nanometerization of metal material surfaces is a new field that has started in recent years. The Chinese patent application (application num...

Claims

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Application Information

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IPC IPC(8): C21D7/06C22F3/00
Inventor 熊天英吴杰金花子郑宗光吴敏杰
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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