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Spheroidisation reaction package for producing ductile cast iron and spheroidisation method therefor

A technology of spheroidizing and nodular cast iron, which is applied in casting equipment, casting melt containers, manufacturing tools, etc., can solve the problems affecting the performance of nodular cast iron and prone to abnormal graphite

Inactive Publication Date: 2009-11-18
SHANGHAI INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The advantage of rare earth magnesium alloy is that the spheroidization method is simple and has the ability to resist interference elements, but it is prone to abnormal graphite, which affects the performance of nodular cast iron

Method used

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  • Spheroidisation reaction package for producing ductile cast iron and spheroidisation method therefor
  • Spheroidisation reaction package for producing ductile cast iron and spheroidisation method therefor
  • Spheroidisation reaction package for producing ductile cast iron and spheroidisation method therefor

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Embodiment 1

[0029] A spheroidizing treatment reaction package for producing nodular cast iron

[0030] Enclosure 1 is welded by 8mm steel plate, and enclosure wall 2 is knotted by refractory material, wherein the refractory material consists of 20% refractory mud, 5% corundum powder, 60% quartz sand and 15% water glass composition. There is a rotatable hook 3 on the upper part of the enclosure 1. The hook 3 is connected to the enclosure 1 through the bolt 6. The enclosure 1 is 1700mm high, 700mm in diameter, and the thickness of the enclosure wall 2: 80mm at the top, 120mm at the bottom, The thickness is 150mm, and there is a boss 4 with a groove at the bottom of the bag body. The boss 4 is 175mm away from the center point, the height is 120mm, the width is 150mm, the length extends to the bag wall 2, the groove width is 120mm, the depth is 80mm, and the length extending to the cladding wall 2;

[0031] The inner diameter of the reaction tube 5 is 70 mm, the thickness of the thin-walled...

Embodiment 2

[0047] A spheroidizing treatment reaction bag for producing nodular cast iron, as in Example 1.

[0048] A spheroidizing treatment method of a spheroidizing treatment reaction package for producing nodular cast iron

[0049] (1), nodulizer passivation magnesium into the reaction tube

[0050] Spheroidizing agent passivated magnesium (magnesium content is greater than 92%, particle diameter 2mm) is packed into reaction tube 5, and loading is 1.3Kg, adds ferrosilicon powder (silicon: 55%, all the other are iron, particle every 30mm) The diameter is 2mm), the amount of addition is 30g, and then baked in an oven for 90min at a baking temperature of 120°C;

[0051] (2), the reaction tube into the spheroidization reaction bag

[0052] The step (1) is packed into the reaction tube 5 of passivated magnesium into the groove of the boss 4 at the bottom of the spheroidization reaction bag, the positions of the 3 small air holes 51, 52 and 53 are upward, and the gap between the reaction t...

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Abstract

The invention discloses a spheroidisation reaction package for producing ductile cast iron and a spheroidisation method therefor, belonging to the field of casting. The reaction package is composed of a package body, a package wall and a rotatable fishhook; wherein, the fishhook is connected with the package body by a bolt; the reaction package is characterized in that a convex plate with a groove is arranged at the bottom part of the package body, the convex plate is located at one side of the center of the package bottom; a reaction tube is arranged in the groove, three small air holes are arranged on tube wall of the reaction tube and are on a straight line. When the reaction tube is filled with nodularizers, under the heat effect of molten iron, the thinnest part of the tube wall of the reaction tube begins to melt; with the gradual melting of the tube wall, the nodularizers sequentially enter the molten iron to facilitate the nodularization reaction to be carried out under controllable conditions; as passivation magnesium serves as the nodularizers, thus putting off the reaction time between the magnesium and the molten iron, lengthening the contact time between magnesium vapor and the molten iron, improving absorptivity of the molten iron and increasing nodularization effect of magnesium.

Description

technical field [0001] The invention relates to a spheroidizing treatment reaction package for producing nodular cast iron and a spheroidizing treatment method, belonging to the field of casting. Background technique [0002] Ductile cast iron is a very important cast iron in the cast iron industry. Its metallographic structure consists of a metal matrix and nodular graphite distributed therebetween. Compared with flake graphite in gray cast iron, spherical graphite has less damage to the continuity of the matrix, so its strength and ductility are far superior to gray cast iron. In the production process of nodular cast iron, there are two important process links: spheroidizing treatment and inoculation treatment. The spheroidizing treatment process mainly includes the selection of nodularizing agent and the formulation of spheroidizing method. [0003] The commonly used nodulizers are metal magnesium and rare earth magnesium alloys. Metal magnesium was first used in the p...

Claims

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Application Information

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IPC IPC(8): B22D41/00B22D1/00C21C1/10C22C33/10
Inventor 潘嘉祺
Owner SHANGHAI INST OF TECH
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