A slag system for electroslag remelting of high-titanium and high-silicon stainless steel and its preparation method
A technology of electroslag remelting and stainless steel, which is applied in the field of electroslag remelting, can solve the problems of poor quality of electroslag steel ingots and cannot meet the needs of use, and achieve the goal of eliminating unqualified D-type inclusions, significant economic benefits, and improved surface quality Effect
Active Publication Date: 2022-03-01
宝武特冶航研科技有限公司
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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
Method used
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Embodiment 1
[0041] A slag system used for electroslag remelting of high-titanium and high-silicon stainless steel. The composition and proportion of the slag system are shown in Table 1.
[0042] The composition and proportioning table of slag system in the embodiment of table 1
[0043]
[0044] In the table, additional matching refers to: first weigh CaF in proportion 2 , CaO, MgO and Al 2 o 3 , and then weigh the CaF 2 , CaO, MgO and Al 2 o 3 5% TiO in total 2 .
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The invention discloses a slag system for electroslag remelting of high-titanium and high-silicon stainless steel and a preparation method thereof. The slag system comprises the following composition CaF in weight percentage 2 : 51.55~52.45; CaO: 19.55~20.15; MgO: 2.75~8; Al 2 o 3 : 19.55~20.15; TiO 2 : 3.85~4.25; SiO 2 : ≤0.35. The slag system provided by the invention can avoid the reaction of Ti and Si elements in high-titanium and high-silicon stainless steel with oxygen to form new harmful inclusions, especially D-type fine-series inclusions, improve the purity of steel, and prepare high-titanium and high-silicon Stainless steel electroslag ingots meet relevant standards and customer needs.
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...
Claims
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IPC IPC(8): C22B9/18
CPCC22B9/18
Inventor 陈知伟曹征宽李荣之何银珍
Owner 宝武特冶航研科技有限公司