Slag system for electroslag remelting high-titanium and high-silicon stainless steel and preparation method thereof

Abstract

The invention discloses a slag system for electroslag remelting high-titanium and high-silicon stainless steel and a preparation method thereof. The slag system is prepared from the following components in percentage by weight: 51.55-52.45% of CaF2, 19.55-20.15% of CaO, 2.75-8% of MgO, 19.55-20.15% of Al2O3, 3.85-4.25% of TiO2, and less than or equal to 0.35% of SiO2. According to the slag system,the reaction of Ti and Si elements in high-titanium and high-silicon stainless steel with oxygen to form new harmful inclusions, especially class-D fine inclusions can be avoided, the purity of steelis improved, and a prepared high-titanium and high-silicon stainless steel electroslag ingot conforms to relevant standards and customer requirements.

Description

technical field [0001] The invention relates to the technical field of electroslag remelting, in particular to a slag system for electroslag remelting of high-titanium and high-silicon stainless steel and a preparation method thereof. Background technique [0002] With the rapid development of my country's high-end equipment fields, especially aerospace, aviation, military industry, nuclear energy, etc., higher requirements are put forward for the performance of new material products. For stainless steel under special service conditions, higher purity, more uniform composition and structure are proposed. Wait for the request. For example, non-metallic inclusions should be fine and dispersed, without obvious macroscopic component segregation, no shrinkage cavity, loose and other casting defects, uniform and fine structure, small microscopic segregation, uniform and fine carbides, etc. [0003] Electroslag remelting refining is a method of smelting by using the resistance heat...

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Problems solved by technology

[0006] In view of the above-mentioned deficiencies in the prior art, the purpose of the present invention is to solve the problem that titanium and silicon elements are easy to react with oxygen in the slag system to form new harmful inclusions during the existing electroslag remelting refining high-titanium and high-silicon stainless steel, and the electric The poor quality of slag steel ingots cannot meet the needs of use, and a slag system for electroslag remelting of high-titanium and high-silicon stainless steel and its preparation method are provided

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