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Sampling container for fused metal thermal analysis

A technology for sampling container and molten metal, which is applied in the direction of material thermal analysis, sampling, sampling device, etc., can solve the problems of large gradient of cooling curve, large outer size of container, failure to sample molten metal in a predetermined amount, etc. The effect of simplifying the internal structure and reducing the driving force

Inactive Publication Date: 2003-04-02
K K SUKEWA
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

[0006] In the above-mentioned common cup-type and probe-type sampling containers, the time required for analysis is longer, and the temperature drop rate in the eutectic, that is, the gradient of the cooling curve in the eutectic is larger
Therefore, the problem with such containers is that the analytical procedure for determining the eutectic point is complex
In this case, the sampled molten metal may be reversed or diverted by the gas pressure, thereby creating the possibility of not reaching the predetermined amount of sampled molten metal
[0009] In addition, common probe-type sampling containers have other problems, which are due to the complexity of the inner passage and the large outer dimensions of the entire container, which require a large driving force to immerse the container in the molten metal

Method used

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  • Sampling container for fused metal thermal analysis
  • Sampling container for fused metal thermal analysis
  • Sampling container for fused metal thermal analysis

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Embodiment Construction

[0036] Here, preferred embodiments of the present invention will be described with reference to the accompanying drawings.

[0037] Fig. 1 is an explanatory view of an embodiment of the present invention when applied to a cup-type sampling container, Fig. 1(A) is a longitudinal sectional view, and Fig. 1(B) is a bottom view.

[0038] The sampling container 1 is made of baked refractory material, such as ceramics. The sampling container 1 has a cup shape as a whole, and its upper end has an opening 11a for pouring molten metal. A temperature sensor 2, such as a thermocouple made of chromel-alnickel wire, is fixed in such a position that the temperature sensor 2 can be inserted into the sampling chamber 11 through the bottom wall 11b of the chamber.

[0039] In the present example, the diameter D of the sampling chamber is 20 mm, and the depth L of the chamber is 41 mm. The temperature sensor 2 is located within the sampling chamber 11 at a distance LS of 16 mm from the upper ...

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Abstract

The invention provides a sampling vessel for thermal analysis of molten metal in which the time required for analysis can be shortened and the temperature change rate in eutectic can be reduced as compared with a conventional sampling vessel, so that the eutectic temperature can be obtained easily accurately for a short time. In order to realize the above, the diameter D of a sample chamber 11 is set to be in the range of 16 to 24 mm, the depth L of the sample chamber is set to be 36 mm or more, and the distance LS from an opening 11a of the sample chamber 11 to a temperature sensor 2 is set to be in the range of 7 to 22 mm. Accordingly, the time required for the temperature to reach the eutectic point can be shortened, and the gradient of a cooling curve in eutectic can be reduced.

Description

technical field [0001] The present invention relates to a sampling vessel for thermal analysis of molten metals, more particularly, to a sampling vessel for thermal analysis of casting materials such as cast iron, aluminum and aluminum alloys in production before a furnace. Background technique [0002] When casting light metals such as aluminum and its alloys, the following methods are usually used to study the structure of the molten metal in front of the furnace. The molten metal is poured into a sampling vessel for thermal analysis equipped with a temperature sensor, and a cooling curve of the molten metal is obtained from the output of the temperature sensor. As this type of sampling container, a so-called cup-shaped container is often used. This cup-shaped container has: a container body made of refractory material, which has a substantially circular bottom shape, and which has a sampling chamber opened at the upper end; and a temperature sensor, such as a thermocoupl...

Claims

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Application Information

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IPC IPC(8): G01N1/10G01K13/12G01N1/12G01N25/04G01N33/20
CPCG01K13/12G01N1/125G01N33/206G01N25/04G01N33/205
Inventor 奥园强
Owner K K SUKEWA
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