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A composite integral stopper rod and its manufacturing method

A technology of integral stopper rod and rod head, which is used in manufacturing tools, casting melt containers, metal processing equipment, etc., can solve the problems of large volume expansion, rod tip breakage, and plug rod easy to turn around, and achieve the effect of alleviating thermal expansion differences.

Active Publication Date: 2015-08-05
北京利尔高温材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Magnesium-carbon plug rods in the prior art are generally made of magnesium-carbon material for the rod head, and aluminum-carbon material for the rod body, and a transition material (magnesium-carbon mud material and aluminum-carbon mud material) with a length of about 20 to 50 mm is added between the two. Mix uniform mud according to a certain proportion), due to the difference in thermal expansion between magnesium-carbon and aluminum-carbon materials, the stopper rod is easy to turn around and the tip of the rod is broken during use. With the prolongation of casting time, the transition material is baked for a long time During roasting and use, a reaction will also occur to form spinel, resulting in a large volume expansion, which will cause the club head to break

Method used

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  • A composite integral stopper rod and its manufacturing method

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Effect test

Embodiment 1

[0029] The spinel carbon material used in the transition section 2 is composed of 73 g spinel, 25 g graphite, 2 g metal silicon powder, and 15 g phenolic resin. Mix the spinel, graphite, metallic silicon powder and phenolic resin according to the above configuration example, granulate and dry to make the spinel carbon material used in the transition section 2. The spinel carbon material and the tip 1 The magnesium carbon material used and the rod body 3 The aluminum carbon material used is placed on the corresponding position of the composite integral stopper mold, the spinel carbon material is added to a height of 20mm (that is, the height of the transition section is 20mm), and it is formed by isostatic pressing Then, it is calcined in a non-oxidizing atmosphere at a temperature of 900°C to obtain a composite integral stopper rod; then the shape of the composite integral stopper rod is processed according to a preset standard, and an anti-oxidation coating is sprayed to wait f...

Embodiment 2

[0031] The spinel carbon material used in the transition section 2 is composed of 78 g spinel, 17 g graphite, 3 g metal silicon powder, 2 g silicon carbide powder, and 13 g phenolic resin. Mix spinel, graphite, metal silicon powder, silicon carbide powder and phenolic resin according to the above ratio, granulate and dry to make the spinel carbon material used in transition section 2. The material, the magnesium-carbon material of the rod head 1 and the aluminum-carbon material of the rod body 3 are placed on the corresponding position of the composite integral stopper mold, and the spinel carbon material is added to a height of 30mm (that is, the height of the transition section is 30mm), and After isostatic pressing, it is calcined at a temperature of 1100°C and a non-oxidizing atmosphere to obtain a composite integral stopper rod. Then, the shape of the composite integral stopper rod is processed according to a preset standard, and an anti-oxidation coating is sprayed to obta...

Embodiment 3

[0033] The spinel carbon material used in the transition section 2 is composed of 80 g spinel, 18 g graphite, 2 g silicon carbide powder, and 14 g phenolic resin. Mix spinel, graphite, silicon carbide powder and phenolic resin according to the above-mentioned ratio, granulate and dry to form the spinel carbon material used in transition section 2. The spinel carbon material and rod tip 1 The magnesium carbon material and the rod body 3 are placed on the corresponding position of the composite integral stopper mold. The spinel carbon material is added to a height of 40mm (that is, the height of the transition section is 40mm), and it is formed by isostatic pressing Then, it is calcined at a temperature of 1000°C and a non-oxidizing atmosphere to obtain a composite integral stopper rod, and then the shape of the composite integral stopper rod is processed according to a preset standard, and the anti-oxidation coating is sprayed to obtain the required composite integral stopper Th...

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Abstract

The invention relates to the field of a refractory material with a continuous casting function, and particularly discloses a composite integral stopper and a manufacture method thereof. The composite integral stopper comprises a stopper head (1), a transition section (2) and a stopper body (3), wherein the stopper head (1) is made of a magnesium carbon material, the stopper body (3) is made of an aluminum carbon material, the transition section (2) between the stopper head (1) and the stopper body (3) is made of a spinel carbon material, and the spinel carbon material contains spinels, graphite, additives and bonds. The composite integral stopper provided by the invention has the advantage that the phenomenon that the stopper head is broken due to the volume expansion caused by the generation of spinels when the traditional transition material reacts in the use process is avoided.

Description

Technical field [0001] The invention relates to the field of novel continuous casting functional refractory materials, in particular to a composite integral stopper rod and a manufacturing method thereof. Background technique [0002] The integral stopper rod used in the continuous casting process is usually composed of a rod body and a rod head. In the continuous casting process, the integral stopper rod is used in the tundish, and its main function is to adjust the integral stopper rod head and integral immersion type. The matching clearance of the nozzle or the nozzle bowl on the tundish controls the opening and closing of the molten steel in the tundish and the steel flow in the mold, so as to ensure the stability of the molten steel level in the mold and the stability of the continuous casting process. The use conditions of stopper rods are very harsh. They have to withstand high-temperature gas baking, strong thermal shock and violent erosion in the initial stage of pouring...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22D41/18C04B35/66C04B35/622
Inventor 鄢凤明王次明刘丽曹仁锋赵继增刘靖轩胡玲军赵冉张艳凤于九利车晓梅樊浩勇任林黄建
Owner 北京利尔高温材料股份有限公司