Smelting process of ultra-low carbon stainless steel material

A smelting method and stainless steel technology, which is applied in the field of molten steel smelting, can solve the problems that the corrosion resistance cannot meet the requirements of a specific environment and affect the corrosion resistance

Inactive Publication Date: 2018-03-09
KOCEL STEEL
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Problems solved by technology

[0002] At present, for stainless steel materials, taking ZG06Cr13Ni4Mo as an example, the standard requires C ≤ 0.06%, but with the research and application of this kind of material, it is found that its corrosion resistance cannot meet the requirements of specific e

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Embodiment Construction

[0010] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, further description is given below.

[0011] An embodiment of the present invention provides a method for smelting an ultra-low carbon stainless steel material, comprising the following steps:

[0012] EAF furnace smelting: use ordinary steel scrap and returned materials for material preparation, put the prepared raw materials into the EAF furnace to melt to form molten steel, and remove P to meet the standard requirements, and tap the molten steel to the LF furnace;

[0013] Smelting in LF furnace: desulfurize the molten steel entering the LF furnace to less than 0.005%, then add high-carbon ferrochrome, low-carbon ferrochrome, nickel plate, and ferromolybdenum to the molten steel to introduce alloying elements and adjust the content of chromium Satisfy C: 0.4~0.5%, P<0.025%, S<0.007%, Cr: 12.0~12.4%, Ni: 4.0~4.5%, Mo: 0.45~0.6%, and then power up to 1620~1630℃, the...

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Abstract

The invention discloses a smelting process of an ultra-low carbon stainless steel material, which includes EAF furnace smelting, LF furnace smelting, VOD furnace smelting, LF furnace final component adjustment; LF furnace smelting step includes steps of adding high carbon ferro-chrome, low-carbon ferrochromium, a nickel plate, and ferro-molybdenum in steel fluid, introducing an alloy elements andincreasing the carbon content; the VOD furnace smelting adopts the vacuum oxygen blasting and decarbonizing; the LF furnace final component adjustment includes the step of adjusting the final component of the steel fluid. Through introducing the high carbon alloy to increase the carbon content, the oxygen blowing and decarbonizing in the VOD furnace can fully release, the steel fluid temperature is improved, the Cr oxidization is reduced; the reduction time is shortened, the steel fluid cooling time is shortened, the time and opportunity of the electricity delivery and temperature rise are reduced; thus the steel fluid carbon increasing caused by the graphite electrode electricity delivery and temperature rise is reduced, and the carbon content is reduced.

Description

technical field [0001] The invention relates to the technical field of molten steel smelting, in particular to a method for smelting ultra-low carbon stainless steel materials. Background technique [0002] At present, for stainless steel materials, taking ZG06Cr13Ni4Mo as an example, the standard requires C≤0.06%, but with the research and application of this kind of material, it is found that its corrosion resistance cannot meet the requirements of specific environments. The root cause is the influence of carbides in it. For the corrosion resistance of this kind of material, in order to obtain better corrosion resistance, the carbon content needs to be reduced to below 0.03%, so as to improve the corrosion resistance. In the past, the carbon content of stainless steel materials smelted by electric arc furnaces was generally controlled within the range of 0.025 to 0.05%, which could not be stably controlled below 0.03%. Solved technical problems. Contents of the inventio...

Claims

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Application Information

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IPC IPC(8): C21C7/068C21C7/064C21C7/072C21C7/10C21C7/00
CPCC21C7/0006C21C7/064C21C7/0685C21C7/072C21C7/10C22C33/06C22C38/44Y02P10/20
Inventor 龚明健张生存马进赵国伟
Owner KOCEL STEEL
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