Production method for controlling large inclusions in round continuous cast billet made of carbon manganese steel
A production method, the technology of medium carbon manganese steel, applied in the field of metallurgy, can solve the problems of layered pitting of the pipe body, achieve complete deoxidation, good adsorption capacity of inclusions, and promote the effect of discharge
Active Publication Date: 2018-12-07
DALIPAL PIPE
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Problems solved by technology
[0004] Aiming at the problems of delamination of the pipe body in the rolling process of the existing medium-carbon manganese steel continuous casting round billet and pitting during thread processing, the present invention provides a method for controlling large inclusions in the medium-carbon manganese steel continuous casting round billet production method
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Embodiment 1
[0042] A production method for controlling large-scale inclusions in medium-carbon manganese steel continuous casting round billets:
[0043] The furnace number is 1813239, the carbon-manganese steel 34Mn6Φ180mm section continuous casting round billet production process is as follows:
[0044] Step 1, the total amount of scrap steel in this furnace is 88 tons, and the total amount of natural graphite with a carbon content of 80% is 1000kg, and the materials are divided into three tanks, and the specific distribution of materials is as follows:
[0045] The first tank: 2 tons of small steel scrap are arranged at the bottom of the tank, and then 500kg of microcrystalline blocks are hoisted in, and about 10 tons of scrap steel are placed on it; 18 tons of scrap steel briquettes are placed on it, and 5 tons of heavy-duty steel are placed on it For scrap steel, 5 tons of scrap steel are placed on the top.
[0046] The second tank: 2 tons of small steel scrap are arranged at the bo...
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The invention provides a production method for controlling large inclusions in a round continuous cast billet made of carbon manganese steel. According to the method, the carbon content in end point molten steel of an electric arc furnace is controlled, the adding time and sequence of all materials in steel ladle preliminary deoxidization and alloying working procedures are controlled, compositions of furnace slag in the LF refining working procedure are controlled, whole-course protective pouring is adopted in calcification treatment and continuous casting working procedures, the fluctuationrange of the liquid level of a crystallizer is controlled, by means of the above control measures, the inclusion removing mechanism and all the processes are related closely, steel ladle top slag hasa suitable liquid phase amount, good desulfurization ability and good inclusion adsorption ability, the better effect of removing and controlling the inclusions in the carbon manganese steel can be achieved, the quantity of the inclusions in the finished product molten steel is reduced, and then the purity degree of the molten steel is improved.
Description
technical field [0001] The invention relates to the technical field of metallurgy, in particular to a production method for controlling large-scale inclusions in medium-carbon manganese steel continuous casting round billets. Background technique [0002] Non-metallic phases such as oxides, sulfides, nitrides and other non-metallic phases that are produced or mixed into steel during smelting and pouring, and cannot be eliminated after rolling or heat treatment, and exist independently without any connection with the steel matrix, are collectively referred to as non-metallic phases Inclusions, referred to as inclusions. Inclusions in steel are mainly compounds formed by iron, manganese, chromium, aluminum, titanium and other metal elements and oxygen, sulfur, nitrogen and other elements, among which oxides are mainly deoxidation products, including one-time deoxidation products that fail to float and The secondary deoxidation product formed during the solidification of molte...
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IPC IPC(8): C21C5/52C21C7/00C21C7/06B22D11/116
CPCB22D11/116C21C5/52C21C7/0006C21C7/0056C21C7/06Y02P10/20
Inventor 胡楚江李金伟蔡守桂
Owner DALIPAL PIPE