Cover material covering nodularizer in graphite spheroidizing of cast iron

A technology of covering materials and nodulizers, applied in the field of covering materials of graphite nodulizers, can solve problems such as defective products, achieve the effect of reducing weight and improving workability

Active Publication Date: 2015-06-17
ISHIKAWALITE IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0016] At this time, the entire amount of each additive is not impregnated, but a part of the slag as impurities floats on the molten liquid. Therefore, if the floating matter is not removed, there is also a problem that defective products will be produced.

Method used

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  • Cover material covering nodularizer in graphite spheroidizing of cast iron
  • Cover material covering nodularizer in graphite spheroidizing of cast iron
  • Cover material covering nodularizer in graphite spheroidizing of cast iron

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] In the high-frequency melting furnace used for graphite crucible No. 15 (2.5L), with a total weight of 6000g, put pig iron and returned charge, recarburizer and inoculant and spherical shape (LCS4) in the processing bag for graphite spheroidization by the punching method The molten iron was obtained under the same conditions, and the composition of the nodular cast iron subjected to the spheroidizing reaction was analyzed and compared with the covering materials comprising various graphite nodularizing agents of the covering material of the present invention, and the results are shown in Table 1.

[0036] [Table 1]

[0037] (weight%)

[0038] Types of covering materials for graphite nodulizers

[0039] example)

Embodiment 2

[0041] In Example 1, the mechanical properties of the test bodies produced using the covering materials of various molten graphite nodulizers were compared, and are shown in Table 2 in comparison with the JIS standard which is ductile iron.

[0042] The results show that the ductile iron using the covering material of the present invention fully meets the specifications. [Table 2]

[0043]

Embodiment 3

[0045] In embodiment 1, for the spheroidization rate that the cover material that uses melting multiple graphite spheroidizers to make, handle with 5% nitric alcohol solution corrosion solution, and in magnification 100 * 0.8 times and field of view (width) The comparison was carried out under 0.98mm, and the results are shown in Table 3.

[0046] [table 3]

[0047]

[0048] As mentioned above, the results of using the coating material of the present invention in the graphite spheroidization treatment of cast iron are shown in Tables 1 to 3, and the effect is equivalent to that of conventional stamping chips, and compared with stamping chips, It has the special effects of light weight and easy operation. In addition, it can also float on the liquid surface after melting to remove impurities, thereby reducing the amount of slag remover.

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Abstract

PROBLEM TO BE SOLVED: To obtain a cover material for a graphite spheroidizing agent being lightweight and easily treatable in a high temperature severe working environment, and usable upon production of ductile cast iron also having an effect as a slag removing agent.SOLUTION: The cover material being volcanic silicate mineral, which comprises, by weight, 70 to 75% SiO, 12 to 14% AlO, 3 to 5% KO, 3 to 4$ NaO, 0.7 to 1.5% CaO, 1.2 to 1.5% FeO, 0.1 to 0.2% MgO and 0.05 to 0.1% TiO, and is made porous.

Description

technical field [0001] The present invention relates to a covering material of a graphite nodularizing agent used in the manufacture of ductile iron, and more specifically relates to a covering material which is light in weight, easy to operate and has the effect of a slag remover in a high-temperature and severe working environment. Background technique [0002] In the past, this kind of spherical graphite cast iron manufacturing technology is a combination of smelting method, desulfurization method, graphite spheroidization method for obtaining a suitable molten metal, molding method for obtaining a strong mold, and casting method. made. [0003] The smelting method, molding method and pouring method are common to ordinary cast iron castings, and the desulfurization method and graphite spheroidization treatment method are unique technologies in the manufacture of spherical graphite cast iron. [0004] As the graphite spheroidizing agent, REM containing Ce was mainly used ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21C1/10B22D1/00C22C33/08
CPCC21C1/10
Inventor 吉川纮平
Owner ISHIKAWALITE IND
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