Preparation method of aluminum-calcium alloy used for vacuum refining molten steel deoxidation and device thereof

An aluminum-calcium alloy and vacuum refining technology, which is applied in the field of preparation of aluminum-calcium alloy for deoxidation of molten steel in RH vacuum refining, can solve the problems of difficulty in making aluminum-calcium alloy, lack of production, and low metal calcium content. Achieve the effect of reducing process operation steps, convenient transportation and storage, and low melting temperature
CN101787452AInactive Publication Date: 2010-07-28郭庆成
3 Cites 8 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
郭庆成
Publication Date
2010-07-28
Estimated Expiration
Not applicable · inactive patent

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
Patent Text Reader

Abstract

The invention discloses a preparation method of aluminum-calcium alloy used for vacuum refining molten steel deoxidation and a device thereof; the high-purity aluminum and calcium are used as the raw material and are prepared according to the weight percent as follows: 70-90 percent of aluminum and 10-30 percent calcium; the calcium is added to the aluminum which is molten by a low-frequency sensing induction furnace, the aluminum and the calcium are molten for 30-40 minutes under the protection of argon gas and then cast into an ingot; after being cooled, the ingot is broken into blocks to prepare the aluminum-calcium alloy. The invention has the advantages that the alloy has high purity and high calcium content and is used for vacuum refining molten steel deoxidation; the deoxidation and calcium can be completed in one step; the O, C, N, S ingredients in the steel are ensured not to exceed the standard requirement; meanwhile, the Al2O3 inclusion content in the steel is greatly reduced, thereby having the obvious effects of reducing nodulation at a pouring water gap and improving steel quality.
Need to check novelty before this filing date? Find Prior Art

Description

1. Technical field

[0001] The invention relates to an alloy deoxidizer for smelting, in particular to a method and a device for preparing an aluminum-calcium alloy for deoxidizing molten steel in RH vacuum refining. 2. Background technology

[0002] With the rapid development of the national economy, the demand for steel products in industries such as automobiles and home appliances is increasing, and the quality is also getting higher and higher. How to produce ultra-low carbon (C<30×10 -6 ), ultra-low nitrogen (N<30×10 -6 ), ultra-low oxygen (O<30×10 -6 ) and ultra-low sulfur (S<50×10 -6 ) steel has always been an important research topic of my country's iron and steel enterprises.

[0003] At present, vacuum decarburization and deoxidation methods are generally used to produce the above-mentioned high-grade steel for automobiles and household appliances. The oxygen content in molten steel after vacuum treatment is very high (generally 200×10 for foreign m...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More