JPS645251Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a molten metal sampling mold that can be suitably used for sampling molten metal, particularly for sampling molten metal.

In the steel industry, etc., it is necessary to frequently collect samples at the stage of adjusting each component of hot metal and molten steel, and analyze the components. For example, when performing preliminary treatment on hot metal, it is extremely important to know the trends of carbon, silicon, phosphorus, sulfur, etc. during the treatment process or before and after the treatment.

However, since hot metal is hypereutectic, graphite and primary graphite are precipitated during the cooling process.
It is extremely difficult to reliably obtain samples suitable for analysis. When performing analysis by emission spectrometry, it is desirable that the sample surface be flat. Generally, a two-part mold 1 having a disc-shaped internal space is used as shown in Fig. 1 a and b, but the obtained sample falls to the bottom of the mold 1 and gradually rises from the bottom. The flat surface 1' of the mold 1 will be filled with
The surface of the sample that comes into contact with the surface tends to become foamy. Although this conventional mold 1 has the advantage that analysis surfaces are formed at two locations on the sample, neither surface has satisfactory properties and often requires surface polishing. Furthermore, since pig iron has a higher carbon content and is harder than steel, it is currently difficult to polish, as it takes time.

The purpose of the present invention is to provide a mold for collecting molten metal samples that solves the above-mentioned problems to some extent and can obtain samples with relatively high flatness compared to conventional molds. A mold for collecting a molten metal sample having a plane to be analyzed, the inner plane of the mold forming the analysis plane being raised and placed;
A sample introduction port is provided from the outside toward the upper part of the inner plane, so that the sampled molten metal flows down along the inner plane.

The present invention will be explained in detail based on the embodiments shown in FIGS. 1 and 2.

FIG. 2 is a sectional view of the mold 1, and the mold 1 is divided into two parts on the left and right sides, a head mold 1a and a bottom mold 1b. These head mold 1a and bottom mold 1b
The space 2 formed by the above is for collecting a hot metal sample, and the space inside the head mold 1a is cylindrical, and the trapezoidal cross section from the bottom mold 1b is placed inside the space 2. A protrusion 3 is inserted. The inner surface 1c of the bottom mold 1b is arranged so as to contact only the bottom surface of the sample and to be located along the vertical direction. Further, a sample introduction hole 4 is provided so as to face the inner plane 1c of the bottom mold 1b and to be parallel to the inner plane 1c. The mold 1 is preferably made of a material with good thermal conductivity, such as copper, iron, steel, SUS, or a heat-resistant alloy.

This mold 1 is used by being inserted into a paper tube 10, as shown in FIG. 3, for example. At the top of the mold 1, there is a sump 11 made of ceramic, iron, sand mold, etc.
is provided and communicates with a sample inlet section 12 bored in the side of the paper tube 10. Therefore, this paper tube 10
When the tip of the sample is immersed in hot metal, the sample inlet part 12
The hot metal enters into the sump 11 and further fills the space 2 through the sample introduction hole 4 of the mold 1. As the sample enters, the air in the space 2 escapes to the outside through the joint between the head mold 1a and the bottom mold 1b. Then, by pulling up the paper tube 10, taking out the mold 1, and splitting the mold 1 into two at the seam, a solidified sample 13 as shown in FIG. 4 is obtained. At the time of sample collection, the hot metal flows down and fills the inner surface 1c of the bottom mold 1b, and the adhesiveness with the bottom mold 1b is extremely good, and the bottom surface of the sample 13 has a smooth shape with almost no irregularities. It will be done. Such a sample 13 having a flat analysis surface has the advantage that the surface requires less grinding time and the analysis accuracy is stable.

Note that the side surface of the sample 13 is used when checking the analyzer. The solidified metal in the sample introduction hole 4 is connected to the sample 13, but if the molten metal is hot metal, it is extremely brittle and can be easily broken off at its base.

In the embodiment, the inner plane 1c of the bottom mold is arranged vertically, but in reality, the molten metal introduced from the sample introduction hole 4 should just flow down on the inner plane 1c. , inner plane 1c
There is no problem even if it is tilted upward at a steep angle.

As explained above, the mold for collecting molten metal samples according to the present invention is designed to allow useful metal to flow down along the inner plane of the mold, which is the analysis plane of the sample. A sample for analysis can be obtained. It should be noted that this mold is not necessarily used exclusively for hot metal, and can of course be used for molten steel as well.

[Brief explanation of the drawing]

Figures 1a and b are cross-sectional views of a conventional mold seen from two directions, and Figures 2 and below show examples of the mold for collecting molten metal samples according to the present invention. FIG. 3 is a cross-sectional view of the mold installed in the paper tube, and FIG. 4 is a perspective view of the obtained sample. 1 is a mold, 1a is a head mold, 1b is a bottom mold,
1c is an inner plane, 2 is a space, 3 is a protrusion, 4 is a sample introduction hole, 10 is a paper tube, and 13 is a sample.

Claims (1)

[Scope of utility model registration request] A mold for collecting a molten metal sample having a flat surface to be analyzed, wherein the inner plane of the mold forming the analysis plane is placed upright, and a sample inlet is opened from the outside toward the top of the inner plane. A mold for collecting a molten metal sample, characterized in that the mold is configured so that the collected molten metal flows down along the inner plane.