A kind of smelting method of low-silicon and high-titanium welding wire steel

A smelting method and high-titanium technology, applied in the field of smelting steel for low-silicon and high-titanium welding wire, can solve the problems of serious nozzle nodules and poor surface quality of continuous casting billets, reduce the amount of silicon returned, and ensure the surface quality of casting billets , to ensure the effect of pourability

Active Publication Date: 2017-01-25
INST OF RES OF IRON & STEEL JIANGSU PROVINCE
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Problems solved by technology

Specifically, this process can realize narrow-range control of impurity elements, and can effectively solve the problems of serious nozzle nodules and poor surface quality of continuous casting slabs in the continuous casting process

Method used

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  • A kind of smelting method of low-silicon and high-titanium welding wire steel
  • A kind of smelting method of low-silicon and high-titanium welding wire steel

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Embodiment Construction

[0016] The inventor of the present case used the smelting method of the present invention to continuously produce 3 furnaces with 140mm×140mm section continuous casting billets in a steelmaking workshop, including the 110t electric furnace smelting process, the ladle refining process and the small billet continuous casting process. The nodule phenomenon, the specific process method is as follows:

[0017] 1) In the electric furnace smelting process, the charge structure includes molten iron and scrap steel, wherein the molten iron accounts for 65-80wt.% of the total charge; when the carbon content in the molten pool is 0.05-0.08wt.%, the phosphorus content is ≤0.01wt. When the temperature is ≥1630℃, the steel can be tapped; when the tapping amount is 15-20wt.%, the alloy and slag are added in the order of "aluminum ingot→silicon manganese→low carbon ferromanganese→nickel plate→lime", among which the amount of aluminum ingot added It is 1.0~1.2kg / t, the addition amount of silic...

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Abstract

The invention discloses a smelting method of steel for a low-silicon high-titanium welding wire. The method comprises an electric furnace smelting procedure, a ladle refining procedure and a small square billet continuous-casting procedure. According to the method disclosed by the invention, 20%-80% by weight of steel ladle top slag after electric furnace tapping is stripped, synthetic slag and lime are added in a refining process to manufacture fresh slag, so that the silicon return amount of molten steel in the refining process is greatly reduced; the problem of nozzle blocking in a continuous-casting process can be effectively solved due to high cleanliness of the molten steel, and thus more than three furnaces are continuously poured smoothly; and the problem of surface quality of a casting billet can be solved by adopting special crystallizer protecting slag.

Description

technical field [0001] The invention belongs to the field of iron and steel metallurgy, and relates to a smelting method for low-silicon and high-titanium welding wire steel. The smelting method of high quality low-silicon and high-titanium welding wire steel. Background technique [0002] In recent years, with the acceleration of my country's industrialization process, the degree of welding automation has been significantly improved, and welding wire has been widely used in vehicle manufacturing, shipbuilding, construction machinery, bridges and other manufacturing industries. In 2011, my country's welding wire consumption has accounted for the total welding material. 59% of consumption. The welding wire steel must have good drawing performance and welding performance, so there are strict requirements on the chemical composition of the steel. The increase of silicon element can reduce the toughness and plasticity of the weld, increase the cracking tendency of the weld, and ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/14C22C33/04C21C7/076C21C7/072B22D11/111B22D11/18
CPCB22D11/111B22D11/115C21C5/52C21C7/06C21C7/076C22C38/04C22C38/08C22C38/14C22C38/32Y02P10/20
Inventor 马建超张宇曹斌
Owner INST OF RES OF IRON & STEEL JIANGSU PROVINCE
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