Technological method for lowering loosening of core part of vacuum furnace steel ingot
A process method and vacuum furnace technology, which is applied in the field of steelmaking production process, can solve rare problems and achieve the effect of reducing the porosity of the core and delaying the cooling speed
Inactive Publication Date: 2018-10-12
BENGANG STEEL PLATES
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AI Technical Summary
Problems solved by technology
Domestic steel is mainly refined and smelted by electric furnace, and there are few reports of mass production of steel ingots by converter process
Method used
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Experimental program
Comparison scheme
Effect test
Embodiment 1
[0010] (1) vacuum smelting; (2) placed in a certain temperature environment; (3) completely solidified; (4) demoulding.
[0011] Put the ingot that has not been completely solidified together with the ingot mold and riser into an environment with a temperature not lower than 800°C, so that the molten steel in the core has sufficient time to replenish, and keep it for about 20 to 30 minutes according to the size of the ingot. To achieve the purpose of reducing the cooling rate and reducing the porosity of the core, the mold will be released after the molten steel is completely solidified.
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The invention relates to the technical field of steelmaking, in particular to a technological method for lowering loosening of the core part of a vacuum furnace steel ingot. The technological method comprises the following steps that (1) vacuum smelting is conducted; (2) the vacuum furnace steel ingot is placed in a certain temperature environment; (3) full solidifying is conducted; and (4) demolding is conducted. The situation that the steel ingot smelted in a vacuum furnace is relatively small, and consequently the core part is often loosened due to the fact that molten steel replenishment is not timely is solved well.
Description
technical field [0001] The invention relates to the technical field of steelmaking production technology, in particular to a process method for reducing porosity in the core part of a steel ingot in a vacuum furnace. Background technique [0002] In order to improve the competitiveness of steel ingots in the market, combined with the characteristics of converter production, a unique set of production technology has been formed, and steel ingots are produced in batches, with a pass rate of above. Domestic steel is mainly refined and smelted by electric furnace, and there are few reports of mass production of steel ingots by converter process. However, due to the rapid development of continuous casting round billets produced by converters in recent years, its low cost and high yield have squeezed out part of the market for steel ingots less than 1 ton. Converter production of special steel bars is a mature process. A large number of foreign countries use converters to smelt ...
Claims
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IPC IPC(8): B22D7/00
CPCB22D7/00
Inventor 刘彦海刘学海杨志刚梁雪冬燕际军曹志众杜秀川
Owner BENGANG STEEL PLATES