Electroslag remelting process of titanium-containing alloy steel

Abstract

The invention discloses an electroslag remelting process for titanium alloy steel, which comprises the following steps of: (1) preparing consumable electrodes; (2) preparing electroslag; (3) forming slag through electroslag; (4) remelting electroslag. The step (3) of slag formation comprises the following procedures of: firstly, adding one third of total slag material into a crystallizer to form slag, mixing a right amount of mixture including Al powder and FeTi powder into the rest residue material, and adding the rest residue material with the mixture into the crystallizer to form slag. Theelectroslag remelting process for titanium alloy steel does not need special slag purification process, the investment to slag purification equipment is reduced, the technological flow is shortened, and the production cost is greatly lowered. By adding the mixture of Al powder, FeTi powder and CaF2 powder into a slag pool in the process, oxygen generated by unstable oxides in the molten slag can be prevented from entering the slap pool and a molten pool to oxidize elements in steel, and the massive uncertain oxidation burning of Ti element in steel is avoided. Therefore, the content of Ti element in the titanium alloy steel obtained by the process can accurately reach the standard requirement, and the quality of the titanium alloy steel is ensured.

Description

technical field [0001] The invention relates to a steelmaking process, in particular to a smelting process of titanium-containing alloy steel. Background technique [0002] Electroslag remelting is a method of smelting using the resistance heat generated when the current passes through the slag as a heat source. Its main purpose is to purify the metal and obtain a steel ingot with a uniform and dense crystal structure. In the process of obtaining titanium-containing alloy steel through electroslag remelting, since Ti is a highly active and easily oxidized element, how to prevent active elements from being oxidized and burned during the electroslag process has always been an important metallurgical issue in electroslag remelting. [0003] In the process of electroslag remelting, oxygen enters the slag pool and molten pool through the following channels, oxidizes and burns Ti, and affects the change of Ti content in steel: [0004] 1. The oxygen dissolved in the consumable el...

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Problems solved by technology

However, special equipment is required for slag purification, and it takes a lot of manpower, material resources and time to purify slag, which increases the production cost.

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