Preparation method, secondary refining method and refining agent of PMHSS (powder metallurgy high speed steel)

A powder metallurgy and refining agent technology, applied in the refining agent for powder metallurgy high-speed steel out-of-furnace refining and the preparation of powder metallurgy high-speed steel, can solve unfavorable bottom pouring atomization process temperature control, weak deoxidation and desulfurization ability, and removal of inclusions Weak capacity, etc., to ensure the effect of removing inclusions, optimizing the slag resistance, and increasing the viscosity of the slag system
CN103276154AActive Publication Date: 2013-09-04HEYE SPECIAL STEEL
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
HEYE SPECIAL STEEL
Publication Date
2013-09-04

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Abstract

The invention relates to an adding treatment agent for preparing PMHSS, in particular to a refining agent for secondary refining refining of the PMHSS. The refining agent comprises a primary refining agent for performing desulfuration and deoxidation during primary refining and a secondary refining agent for performing secondary refining after the primary refining. At the same time, the invention further relates to a secondary refining method of the PMHSS applying the refining agent and a preparation method of the PMHSS applying the secondary refining method. Two times of waste washing are adopted, that is, the primary refining agent is adopted for the first waste washing, so that desulfuration and deoxidation on molten steel are realized, then the secondary refining agent is added to remove impurities, and the purity of the molten steel is effectively improved.
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Description

technical field

[0001] The invention relates to an additive treatment agent for powder metallurgy high-speed steel preparation, in particular to a refining agent for powder metallurgy high-speed steel refining outside the furnace, and at the same time the invention also relates to a powder metallurgy high-speed steel refining outside the furnace using the refining agent method, and a method for preparing powder metallurgy high-speed steel using the out-of-furnace refining method. Background technique

[0002] The traditional powder metallurgy high-speed steel preparation method usually includes steps such as molten steel smelting, out-of-furnace refining, bottom pouring atomization, powder sheathing sealing welding extraction, hot isostatic pressing, and forging. In these process steps, the refining outside the furnace is to pour the molten steel initially smelted in a conventional steelmaking furnace into a ladle or a special container, and use the refining agent in the lad...

Claims

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