Continuous casting crystallizer casting powder special for bar plate stainless steel containing titanium and manufacturing technique thereof

Abstract

The invention relates to an auxiliary product for metallurgy used for continuous casting of titanium-containing stainless steel in the metallurgy field, which is mainly applied in the mould powder technique of pre-melted crystallization mould of continuous casting for high titanium containing stainless steel. The materials of the invention comprise: specific used pre-melted base materials containing boron, flux materials, carbonaceous materials and additives; wherein, the flux materials comprise Li2CO3, Na2CO3, NaF, etc. The invention is characterized by good performance of accommodating and adsorbing titanium inclusion under the condition of meeting requirements for adding no carbon and reducing regrinding of traditional stainless steel; besides, after absorption of inclusion, the viscosity properties and solidification properties of the mould powder can be kept relatively stable, and compared with the import slag, the invention has the advantages of lower caking bleeding rate, casting billet with less surface defect, high anterograde of processing. Besides, the production of the invention has little slag strip; reaction in the crystallization mould is active; spreading property is good.

Description

technical field [0001] The invention relates to a special continuous casting crystallizer mold powder for titanium-containing slab stainless steel and a production process thereof. technical background [0002] At present, the mold slag products of titanium-containing stainless steel continuous casting molds used in China mainly rely on imports, and the existing problems are: 1. The cost of mold slag is high, resulting in high production costs of products; 2. Imported slag cannot be effectively combined with the specific process in my country 3. Titanium-containing stainless steel has a lot of titanium inclusions, and most of the inclusions are in the shape of high melting point, so the quality of the mold powder is easy to deteriorate during use, resulting in poor craftsmanship. There are many problems with the surface quality of the straight line and the slab, and the foreign slag is not very suitable for solving the above problems, resulting in a large amount of grinding an...

AI Technical Summary

Problems solved by technology

[0002] At present, the mold slag products of titanium-containing stainless steel continuous casting molds used in China mainly rely on imports, and the existing problems are: 1. The cost of mold slag is high, resulting in high production costs of products; 2. Imported slag cannot be effectively combined with the specific process in my country 3. Titanium-containing stainless steel has a lot of titanium inclusions, and most of the inclusions are in the shape of high melting point, so the quality of the mold powder is easy to deteriorate during use, resulting in poor craftsmanship. There are many problems with the surface quality of the straight line and the slab, and the foreign slag is not very suitable for solving the above problems, resulting in a large amount of grinding and other problems, etc.

[0004] In order to effectively solve the problem of continuous mold slag for titanium-containing stainless steel, the premise is that we must understand the problems that are prone to occur in the process of continuous casting of titanium-containing stainless steel. The analysis mainly includes the following aspects: 1. Carburization of the surface of the slab Problems; 2. Titanium inclusions will easily deteriorate the performance of mold flux after entering the mold flux liquid slag layer; 3. Surface quality problems, such as pits, scars, cracks, etc.