SU1323954A1 - Method of estimating quality of amorphous foil - Google Patents

Abstract

The invention relates to the field of metallurgy, in particular to the production of amorphous metal fouls (metal glasses), and can be used in instrument-making and electronic industries. The purpose of the invention is to increase productivity by reducing the volume of measurements. In the method, microhardness is measured on the surface of a foil that does not touch (Yang) and contact (He) with a disc in the manufacture of an amorphous foil in the area of loads on an indenter of 30-60 g, and the quality is assessed by the ratio HH-HS / HH as follows: HLH / HH L% - high quality foil; 5 ° / about Hn-Hc4l5% - foil of satisfactory quality; 15 / o Nn-Ne / Ne - foil of low quality. 2 tab. 10) with the co

Description

The invention relates to metallurgy, in particular to the production of amorphous metal fouls (metal glasses), and can be used in instrument-making and electronic industries.

The purpose of the invention is to increase productivity by reducing the volume of measurements.

The method is implemented in the following way.

Two segments of the controlled foil are placed on the microhardness metering table so that one of them lies on the side in contact with the disk and the other on the side not in contact with the disk during the manufacture of amorphous foil. A load is then applied to the indenter, embedded in the foil, and the microhardness of two segments is measured at the same load on the indenter of 30-60 g. Since the nucleation of the crystalline phases occurs from the surface in contact with the manufacture of amorphous foil with a disk, the difference in microhardness on the surfaces (contiguous and unadjusted during the manufacture of amorphous foil with a disk) will characterize the quality of amorphous foil /, which is evaluated by the ratio 1711

the following way:

L

IT11

 - high quality foil

/ 7n

 - Foil Satisfied

in quality;

1 s o / 7n - lieI

 - 77 low quality foil

Mon

where He is the microhardness of the surface of the foil in contact with the disk;

Hn is the microhardness of the non-contiguous surface.

Example. Controlled amorphous foils of composition P8oP2o, manufactured by

10,500 ± 30 20 550 -n 30

rapid quenching of the melt from a temperature of 1400 ° C on a copper disc with a diameter of 30 cm. It is known that the quality of the resulting

foil. The rate of quenching of the melt is determined by the speed of rotation of the disk. Microhardness measurements were carried out on a PMT-3 instrument for four amorphous foils produced at different rates of quenching (disk rotation speeds of 4000, 3000, 2500,

2000 rpm).

The results of measuring the microhardness of the foil obtained by rotating the disk at a speed of 2500 rpm from two sides of it (HN and He} under different loads on the indenter of the PMT-3 device are shown in Table 1.

From tab. 1 it follows that the area of loads on the indenter of 30-60 g is optimal for controlling the quality of the foil. At loads less than 30 g - a large measurement error of microhardness; at loads of large 60 g, the foil is pushed by the indenter.

Measurement results

HH - Not J.

77 foils

fin

Obtained at different speeds of rotation of the disk (different rates of quenching) are listed in Table. 2. The load on the indenter 50 g

Claims (1)

Invention Formula The method of assessing the quality of an amorphous foil, which consists in influencing the sample by an external factor, records the effects of exposure, and evaluates the quality, which in order to increase productivity, uses the load acting through the indenter as an external factor. The quality of the effects is microhardness on the foil surfaces. t a 5 l and c a 1 Large error H-jMepcHiiH N "and low accuracy KOHTJ) Ol quality. Load area optimal for quality control. Minimal noi-- the resolution of Pi, Not. Pho. i.ha prodded by; 1. tenors) m 40,000 550 + 10 3000 550 t 10 2500 550 + 10 2000 550 + 10 table 2 i10 +10 +10 ten 2 13 18 High quality foil Satisfactory foil Low quality foil