Preparation process of a large ultra-thick ductile iron container sample

Abstract

The present invention relates to a large-scale ultra-thick nodular cast iron container sample preparation process. Firstly, after the TM sample is taken out by the process of preparing the sample by nesting and drilling blind holes, the excess material is removed by turning or milling, and the casting body is divided into the following steps in order Preparation: TD sample is prepared by nesting drill; drill a circle of central row of holes at the diameter distribution position of TD sample, and two-by-two intersect; drill three rows of through holes longitudinally at the position of side row of holes, and the circumferential direction is evenly distributed at 120°. Divide the three sets of H1000 sample positions of the spherical graphite cast iron container shell into three fan-shaped parts; respectively saw the above 120° fan-shaped parts into two parts of 90° and 30°; saw the 90° part longitudinally according to 17° five equal parts , and each is sawn longitudinally from the middle into two equal parts, that is, the H1000 sample, and then milled to the requirements according to the size; saw the core from the middle, and divide it into two semicircles; take the remaining samples, from the above The top surface of each divided part is marked with position lines according to their respective areas, and is further divided using a conventional small sawing machine.

Description

Technical field [0001] The present invention is directed to a large-scale ultra-thick ball ink cast iron container sample production process. It belongs to the field of nuclear power technology. Background technique [0002] Common ductile iron pieces were used to prepare for direct use of ferrous drill. It is characterized in that the bulky cast iron parts body structure is small, thinner, small number of samples, normal sampling position is usually near surface. The step is single, and the sample direction is the outer surface of the vertical body. Large ultra-thick ball ink cast iron container, a side wall thickness and bottom wall thickness of 500 mm, larger than φ1500, used to store fuel cylindrical containers, its design life exceeds 100 years or even millennium, if the accident occurs, will result in accidents The major accidents of nuclear leaks, therefore to verify the rationality of the casting process, for large ultra-thick ball ink cast iron containers, which require ...

AI Technical Summary

Problems solved by technology

The first process of commonly used sample preparation is to use the flame cutting process to divide the large ultra-thick ductile iron container into multiple small parts. The disadvantage is that the thermal processing process will destroy the material properties of the cast iron container itself, which will cause deviations in the test results.

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