Method for producing 4Cr5MoSiV1 mold steel by continuous casting electroslag

A mold steel and continuous casting technology, which is applied in the field of continuous casting electroslag production of 4Cr5MoSiV1 mold steel, can solve the problems of low dimensional accuracy of finished mold steel, low production efficiency of forging methods, and limited yield of finished products, and achieve non-metallic The content of inclusions is low, the production process is simple to implement, and the effect of improving the yield

Active Publication Date: 2017-07-14
BENGANG STEEL PLATES
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Problems solved by technology

[0008] However, there are many shortcomings in the above three production processes.
First, the production rate of 4Cr5MoSiV1 mold steel is limited to a certain extent by the die casting process; second, the production of 4Cr5MoSiV1 mold steel by forging can effectively improve the internal st

Method used

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Example Embodiment

[0030] Examples,

[0031] The actual production steps for manufacturing 4Cr5MoSiV1 die steel using the technical scheme of the present invention are as follows:

[0032] 1) Electric furnace smelting

[0033] 44.3t hot metal mixed with 6t scrap steel; oxygen oxidation, intense boiling, automatic slag flow, oxidation temperature 1578℃, C is 0.10%, P is 0.005% when tapping, other residual elements are qualified, temperature is 1673℃, 1 / 4 time for tapping Add 300kg of slag and 80kg of pre-deoxidizer aluminum and iron.

[0034] 2) LF refining

[0035] Blow argon in the whole process, use 450kg of active lime, 200kg of alumina ball to make slag, use carbon powder, ferrosilicon powder 2~4kg / t powdery deoxidizer, the interval of each batch is 5~10min. The white slag is refined, and the reducing atmosphere is maintained to the hanging bag, and the white slag retention time is not less than 20min. After good deoxidation, add baked ferrochrome, ferromolybdenum, ferrovanadium and other alloys ac...

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Abstract

The invention belongs to the technical field of steel production methods, and particularly provides a method for producing 4Cr5MoSiV1 mold steel by continuous casting electroslag. The method comprises the following steps that an electric-arc furnace smelts molten steel, a ladle refining furnace refines the molten steel, a vacuum degassing furnace refines the molten steel, continuous casting 235mm x 265mm medium square billet is conducted, electroslag remelting is conducted, heating rolling is conducted, and annealing is conducted. The molten steel component is controlled by, in mass percentage, C: 0.37-0.43%, Mn: 0.30-0.50%, Si: 0.90-1.20%, P: <0.025%, S: 0.010%, Cr: 4.80-5.50%, Mo: 1.20-1.50%, V: 0.90-1.10%, Cu: <0.25%, Ni: <0.25%. The balance is iron and unavoidable impurities. The method for producing 4Cr5MoSiV1 mold steel by continuous casting electroslag uses technology of the continuous casting billet + electroslag remelting + rolling replacing forging to manufacture and produce 4Cr5MoSiV1 mold steel, the comprehensive mechanical properties of the 4Cr5MoSiV1 mold steel are ensured, the production rate of the 4Cr5MoSiV1 mold steel is improved, so that production costs are reduced and production efficiency is increased.

Description

technical field [0001] The invention belongs to the technical field of steel production methods, and in particular provides a method for producing 4Cr5MoSiV1 mold steel by continuous casting electroslag. Background technique [0002] Mold steel is an important material in the mold processing and manufacturing industry, which directly affects mold processing, mold quality and product quality. Processing molded parts with molds has a series of advantages such as high production efficiency, good quality, material saving and low cost, and has a wide range of applications. Hot work die steel is an important type of die material. Since hot work dies work at high temperatures for a long time, their structure will change as the service time prolongs, and their performance will change accordingly. Therefore, this requires Hot work die steel has good strength and toughness, cold and heat fatigue performance and high temperature thermal stability. [0003] 4Cr5MoSiV1 is equivalent to...

Claims

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Application Information

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IPC IPC(8): C22C33/04C22C38/22C22C38/24C22C38/02C22C38/04C22B9/18
CPCC22B9/18C22C33/04C22C38/02C22C38/04C22C38/22C22C38/24
Inventor 王德勇卢秉军阚开李锡峰宋满堂
Owner BENGANG STEEL PLATES
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