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Smelting method of electrode bar base material for non-protective-atmosphere electroslag remelting of H13 steel

A technology of electroslag remelting and smelting method, which is applied in the field of iron and steel metallurgy, can solve the problems of easy secondary oxidation and low cleanliness of electroslag remelting in non-protective atmosphere, and achieves reduction of inclusion content, high cleanliness, and avoidance of The effect of oxygenation

Active Publication Date: 2021-06-18
CHENGDU ADVANCED METAL MATERIALS IND TECH RES INST CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The technical problem to be solved by the present invention is the problem that the existing electrode rod base material used for non-protective atmosphere electroslag remelting H13 steel has low cleanliness and is easy to be secondary oxidized in the process of non-protective atmosphere electroslag remelting

Method used

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  • Smelting method of electrode bar base material for non-protective-atmosphere electroslag remelting of H13 steel
  • Smelting method of electrode bar base material for non-protective-atmosphere electroslag remelting of H13 steel
  • Smelting method of electrode bar base material for non-protective-atmosphere electroslag remelting of H13 steel

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Embodiment

[0043] This embodiment provides three groups of electrode rod base materials for non-protective atmosphere electroslag remelting H13 steel smelted by the smelting method of the present invention, such as Examples 1, 2 and 3. The specific smelting process includes the following steps:

[0044] a. Electric furnace steelmaking: Take scrap steel, pig iron, high-chromium ferro-chromium, high-molybdenum ferro-molybdenum and recarburizer for batching, control carbon and phosphorus content; put lime on the bottom of the furnace and then charge, power transmission and melting; after the furnace charge is fully melted, blow Oxygen, control the [P] content, adjust the voltage and current after the end, and adjust the temperature of the molten steel to tap the steel. The specific control parameters are shown in Table 1.

[0045] Table 1 Process parameters of EAF steelmaking

[0046]

[0047]

[0048] b. LF furnace refining: adding Al wire; adding steel slag and 5kg / ton of steel in b...

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Abstract

The invention discloses a smelting method of an electrode bar base material for non-protective-atmosphere electroslag remelting of H13 steel, and belongs to the field of ferrous metallurgy. The smelting method of the electrode bar base metal for non-protective-atmosphere electroslag remelting of the H13 steel comprises the steps of electric furnace steelmaking, LF furnace refining, VD vacuum degassing, pouring and the like. According to the smelting method, by increasing the content of [Al] in the steel, adjusting the composition of the LF slag, and adjusting a VD argon soft blowing system to be proper, the content of inclusions in the molten steel can be effectively reduced, and the cleanliness of the electrode bar base material is improved. By the adoption of the electrode bar base material prepared through the method, secondary oxidation of molten steel in the electroslag remelting process can be avoided, so that the content of oxidation-system inclusions in the H13 steel manufactured through non-protective-atmosphere electroslag remelting is reduced, and the quality of steel obtained after non-protective-atmosphere electroslag remelting is improved. The problems that an existing electrode bar base material used for non-protective-atmosphere electroslag remelting of the H13 steel is low in cleanliness and prone to secondary oxidation in the non-protective-atmosphere electroslag remelting process can be effectively solved.

Description

technical field [0001] The invention belongs to the field of iron and steel metallurgy, relates to non-protective atmosphere electroslag remelting H13 steel, in particular to a method for smelting an electrode rod base material used for non-protective atmosphere electroslag remelting H13 steel. Background technique [0002] H13 steel is a C-Cr-Mo-Si-V martensitic hot work die steel. H13 hot work die steel is famous for its comprehensive properties such as good hardenability, red hardness, toughness and thermal crack resistance It is widely used in aluminum extrusion dies, die-casting dies and forging dies. Due to its high working temperature and harsh working environment, it is frequently subjected to physical and chemical effects such as wear, thermal fatigue, and erosion during use, so it has high requirements for its metallurgical quality. In order to have high temperature strength, wear resistance, toughness, especially thermal fatigue resistance at the same time, there...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B9/187C22C38/02C22C38/04C22C38/22C22C38/24C22C33/06C21C7/10C21C7/06C21C7/072B22D25/04
CPCC22B9/18C22C38/02C22C38/04C22C38/22C22C38/24C22C33/06C21C7/10C21C7/06C21C7/072B22D25/04
Inventor 蒋琪吴铖川王唐林王洪利
Owner CHENGDU ADVANCED METAL MATERIALS IND TECH RES INST CO LTD
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