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Method for accurately determining surface roughness through adopting amorphous alloy

A surface roughness and amorphous alloy technology, applied in the field of materials, can solve the problems of difficult surface tension of impression materials, differences in thermal expansion coefficient, easy adhesion and falling off, etc., and achieve the effect of low deformation and adhesion loss

Inactive Publication Date: 2013-03-13
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the surface tension of the impression material, it is difficult to reach the bottom of the tiny peaks and valleys; the material will shrink when it is melted and poured; the difference in thermal expansion coefficient between the impression mold and the part to be tested; and because the traditional impression material is soft plastic before and after imprinting Material, easy to stick off or even deform when peeled off
These reasons will lead to measurement distortion when the impression method is used to measure the roughness of the workpiece
Therefore, traditional materials are difficult to achieve high-precision impressions due to their own nature constraints.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Example 1. Using Ce-based amorphous impression material to measure the surface roughness of aluminum alloy plate

[0024] Preparation of Ce-based Bulk Amorphous Alloy Ce by Water Quenching 70 al 10 Cu 20 , the specific thermodynamic data are as follows: Tg=68°C, Tx=135°C, ΔTx=67°C. Clean the surface of the aluminum alloy plate sample for use, heat the Ce-based amorphous alloy and the aluminum alloy sample to be tested to 110°C in a silicone oil bath, and keep it warm for 1 minute. At this time, the Ce-based amorphous alloy with thermoplastic forming ability is taken out , Imprinting and lamination is quickly carried out on the surface of the aluminum alloy plate, the extrusion pressure is controlled at about 1MPa, and the impression is removed after cooling to room temperature. The surface roughness of the specified position of the aluminum alloy plate and the corresponding position of the Ce-based impression were measured by the optical section method, and the maxi...

Embodiment 2

[0025] Example 2. Using a Pt-based amorphous impression material to measure the surface roughness of a ceramic mold

[0026] Preparation of Pd-Based Bulk Amorphous Alloy Pt by Copper Mold Casting 57.5 Cu 14.7 Ni 5.3 P 22.5 , the specific thermodynamic data are as follows: Tg=235°C, Tx=333°C, ΔTx=98°C. Clean the inner wall of the ceramic mold to be tested, heat the prepared Pt-based amorphous alloy to about 300°C, keep it warm for 1 minute, and then press the Pt-based amorphous alloy with thermoplastic molding ability to the inner wall of the ceramic mold to be tested. , the pressure is controlled at about 50kPa, fully bonded and then cooled to room temperature, peeled off and removed the cooled impression. The surface roughness Rz=18.57μm of the impression was measured by the optical section method, and the surface roughness of the inner wall of the ceramic mold was obtained.

Embodiment 3

[0027] Embodiment 3. Using Pd-based amorphous impression material to measure the surface roughness of the inner side of the deep hole of the steel part

[0028] Preparation of Pd-Based Bulk Amorphous Alloy Pd by Copper Mold Casting 43 Ni 10 Cu 27 P 20 , the specific thermodynamic data are as follows: Tg=305°C, Tx=406°C, ΔTx=101°C. Clean the steel sample to be tested, heat the prepared Pd-based amorphous alloy to about 370°C, keep it warm for 1 minute, press the Pd-based amorphous alloy with the area to be tested in the deep hole of the steel piece, and control the pressure at 5MPa Left and right, after fully bonding, cool to room temperature, and remove the cooled impression. The surface roughness Rz=11.26μm of the impression was measured by optical section method. It solves the problem that the optical section method is difficult to measure the surface roughness inside the deep hole without destroying the sample.

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Abstract

The invention discloses a method for determining the surface roughness of an impression material through adopting a bulk amorphous alloy new material. The bulk amorphous alloy has the thermoplastic forming capability within the supercooling liquid phase interval, so that low-temperature impression treatment can be realized through utilizing the characteristic, and the material is a plastic material completely during impression and is changed into a rigid material with high strength after the impression. Consequently, compared with the traditional material, the bulk amorphous alloy impression material can high precisely reproduce the surface appearances of samples, and the impression can be stored for a long time stably; and moreover, the method is simple and convenient to operate, does not generate pollution, meets the requirements of social sustainable development and has a wide application prospect.

Description

technical field [0001] The invention relates to a new application and a using method of a bulk amorphous alloy, in particular to a method for accurately measuring surface roughness by using an amorphous alloy, which belongs to the field of materials. Background technique [0002] Surface roughness is the most commonly used parameter to characterize the microscopic appearance of the surface of an object. Its existence will affect the matching properties of the workpiece, the working accuracy and strength of the part, and reduce the corrosion resistance of the workpiece surface. Therefore, the surface roughness of the detection workpiece is Important measures to ensure product quality. Surface roughness reflects the microscopic geometric shape error of the surface of mechanical parts. With the development of the machining industry, surface roughness measurement technology has also made great progress, especially with the popularization of computers and the development of moder...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B11/30
Inventor 孔见严钰龙
Owner NANJING UNIV OF SCI & TECH
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