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Low carbon magnesium integral composite stopper rod

A composite stopper and magnesium technology, applied in the direction of casting melt containers, metal processing equipment, casting equipment, etc., can solve the problems of low service life, high price, poor erosion resistance, etc., and achieve long service life and high temperature High flexural strength, good anti-erosion effect

Inactive Publication Date: 2008-03-05
BAOSHAN IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although zirconium carbon plug rods have excellent erosion resistance, they have poor erosion resistance and a short service life. Moreover, due to the large amount of zirconium sand used as raw materials, there is still the problem of high price, which cannot fully meet the use requirements.

Method used

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Experimental program
Comparison scheme
Effect test

Embodiment

[0016] Table 1 lists the composition (percentage by weight) and characteristics of the low-carbon magnesium integral composite stopper rod head material of the present invention.

[0017] Composition (percentage by weight) and characteristics of the embodiment of table 1

[0018] recipe number

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PUM

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Abstract

The present invention relates to one kind of integral composite stopper for continuous casting. The integral composite stopper includes one stopper head and one stopper body of Al-C material, and features the stopper head of low carbon magnesium material comprising fused magnesia with magnesium oxide content over 96 wt% in 50-80 wt%, magnesia alumina spinel in 0-30 wt%, graphite with carbon content over 95 wt% in 5-12 wt%, one or several of Si, Al, silicon carbide and boron carbide in 2-10 wt%, and phenolic resin as binder in 4-8 wt%. The integral composite stopper has high scour resistance, high molten steel erosion resistance, high thermal shock resistance, and long service life.

Description

(1) Technical field [0001] The invention relates to an integral composite stopper rod for continuous casting. (2) Background technology [0002] An integral composite stopper for continuous casting usually consists of a stopper rod body and a rod head. The stopper rod is used in a tundish, and its main function is to control the opening and closing of molten steel in the tundish and the steel flow in the crystallizer. The use conditions of the stopper are extremely harsh, not only to withstand high-temperature gas baking, strong thermal shock and severe erosion at the initial stage of steel pouring, but also to withstand the erosion of molten steel and covering agent. [0003] The common integral stopper rod head currently used is mainly made of aluminum carbon, such as Chinese patents CN02110202.3, CN02135497.9, CN03139125.7, the aluminum carbon rod head can meet the casting of most steel types, but for calcium-treated steel, The aluminum carbon rod head is seriously damag...

Claims

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Application Information

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IPC IPC(8): B22D41/18
Inventor 金从进李泽亚
Owner BAOSHAN IRON & STEEL CO LTD
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