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Nitrided silicon-manganese-iron alloy

A technology for ferrosilicon nitride and ferromanganese alloy, which is applied in the field of ferrosilicon nitride for steelmaking microalloying, and can solve the problems of low density, low nitrogen content and little application value, etc.

Inactive Publication Date: 2006-05-24
CHANGZHOU MAOSHENGTE ALLOY PROD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, ferromanganese nitride, ferrochromium nitride and ferrosilicon nitride have been invented long ago. The nitrogen content of the first two is too low (≤6%), and the application value is not large, while the nitrogen content of ferrosilicon nitride is high, which can reach More than 30%, but it is powdery and has low density, so it is difficult to directly add to molten steel, so it is also difficult to popularize. How to add useful nitrogen elements to molten steel is exactly the purpose of the present invention

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] According to the target composition, common silicomanganese and ferrosilicon through chemical analysis are used for batching, and the above raw materials are melted in a melting furnace.

[0018] After the above raw materials are cooled, they are pulverized into particles below 80 mesh by a pulverizer, stirred with a binder, and pressed into balls with a ball press machine.

[0019] mn

[0020] The above-mentioned silicon manganese nitride is used in the production of HRB400 rebar, and the properties of the steel fully meet the technical requirements of HRB400 rebar.

Embodiment 2

[0022] mn

[0023] The silicon-manganese nitride ferroalloy mentioned above is used in the production of HRB400 rebar, and the performance of the steel can fully meet the technical requirements of HRB400 rebar.

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Abstract

The invention relates to a silicon nitride ferromanganese alloy used for steel-making alloying that is made up from Mn 30-80%, Si 10-60%, N 8-35%, the rest is iron and ineluctable impurity. The alloy could take place of ferroniobium, ferrovanadium to take steel-making micro-alloying to enhance the strength of the steel material. The invention could ensure the steel material meet the request of technical specification.

Description

Technical field: [0001] The invention relates to silicon-manganese nitride ferroalloy for steelmaking microalloying. Background technique: [0002] In the production of steel bars above HRB400, the general method is to add three elements of vanadium, niobium or titanium to strengthen the steel by microalloying. Vanadium-nitrogen alloys, ferro-vanadium or ferro-niobium are commonly used, while ferro-titanium is rarely used, because the nature of titanium is too active, it is difficult to control, the yield in molten steel is low, and the yield of steel products is low. In the past, vanadium-nitrogen alloys were mostly used in China. This alloy uses nitrogen to protect vanadium, which greatly increases the yield of vanadium. However, due to limited vanadium resources, the production of vanadium-nitrogen alloys is difficult, and the price has been high. Therefore, domestic steel mills have Ferro-niobium is used instead of vanadium-nitrogen alloy, but the use of ferroniobium re...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C33/00C22C22/00C22C30/00C22C38/04
Inventor 盛国大言方定
Owner CHANGZHOU MAOSHENGTE ALLOY PROD
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