Iron-based vanadium-nitrogen microalloy additive and preparation method thereof

Abstract

An iron-based vanadium-nitrogen microalloy additive is characterized in that by comprising the following materials by weight: 97.95 parts of 50 ferrovanadium, 2.00 parts of a combustion improver and 0.05 part of a nitriding catalyst. A preparation method comprises the steps as follows: the 50 ferrovanadium is placed in a jaw crusher (1) to be crushed into particles in particle sizes smaller than 10 millimeters; the 50 ferrovanadium particles are placed in a roll crusher (2) to be crushed; the crushed 50 ferrovanadium is placed in a ball mill (3) to be milled; the milled 50 ferrovanadium is placed in a vibrating screen (4) to be screened to obtain 50 ferrovanadium in particle sizes ranging from 120 micrometers to 180 micrometers, and 50 ferrovanadium in particle sizes smaller than or 120 micrometers; the materials are loaded into a planetary forced mixing machine (5) to be mixed uniformly; the uniformly mixed materials are loaded into graphite discs and then placed in a drying machine (6) to be dried; reaction kettles are vacuumized by a vacuum machine (9), filled with nitrogen gas from a nitrogen bottle (10), and ignited for sintering; different pressures are applied to the reaction kettles containing the materials in different particle sizes. The iron-based vanadium-nitrogen microalloy additive produced by the invention has a high vanadium-nitrogen ratio and stable ingredients and is uniform in nitrogenization.

Description

technical field [0001] The invention belongs to metal materials and a preparation method, in particular to an iron-based vanadium nitrogen microalloy additive and a preparation method thereof. Background technique [0002] In the process of adjusting the structure of steel products, it is the only way to increase the strength of ordinary carbon steel and microalloyed steel. The main method is to increase the research and promotion of microalloyed steel, and use microalloyed technology to make carbon steel and microalloyed steel The strength of micro-alloyed steel is doubled, which greatly reduces the consumption of resources. In microalloyed steels, microalloying of vanadium plays an important role. With the continuous deepening of the research work on vanadium nitrogen alloy (VN) at home and abroad, people fully realize the beneficial effect of vanadium nitrogen alloy. Vanadium in the precipitated state gives full play to the precipitation strengthening effect of vanadium...

AI Technical Summary

Problems solved by technology

Raw materials with different particle sizes have different heat dissipation environments and nitrogen requirements during combustion and synthesis. Materials with large particle sizes are in the same combustion environment, resulting in different degrees of reaction, uneven nitriding, and unstable nitriding quality. Quality problems

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