High-temperature self-propagating synthesis method of silicon-manganese nitride alloy

A silicon-manganese nitride alloy and high-temperature self-propagating technology, which is applied in the field of high-temperature self-propagating synthesis of silicon-manganese nitride alloy, can solve the problems of long production cycle, long reaction time, and excess, and achieve flexible production capacity and short reaction time. Effect of shortening and quick response

Inactive Publication Date: 2015-09-02
白城福佳科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main disadvantages of this method are: 1. The technological process is cumbersome; 2. The production cycle is long, and only the reaction process takes up to 34 hours, not counting the crushing, mixing, pelletizing and cooling processes; 3. The production cost is high and crushing is required Equipment, converters, mixers, pelletizers, vacuum sintering furnaces, etc.; 4. It is difficult to control carbon content, which can easily lead to excess carbon: the extra carbon powder added in the preparation is not easy to dissolve into the crystal lattice, resulting in free carbon enrichment. Make the steel carbon exceed the standard
The ...

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] The high-temperature self-propagating synthesis method of silicon-manganese nitride alloy comprises the following steps:

[0019] (1) Calculate the ingredients according to the quality requirements for silicon manganese nitride;

[0020] (2) weighing with 75 ferrosilicon and ferromanganese powder as raw material according to batching calculation, the raw material particle size is less than 300 mesh, add chemical stimulant, the chemical stimulant add-on is 10% of raw material weight;

[0021] (3) Carry out dry powder mixing and homogenization;

[0022] (4) Load the homogenized and mixed powder into a reaction boat, put it into a high-temperature self-propagating furnace, and after vacuuming, feed high-purity nitrogen, and the pressure is controlled at 10MPa;

[0023] (5) With the help of external thermal excitation, ignition and local reaction are induced;

[0024] (6) The reaction proceeds to nitriding spontaneously, and the silicon-manganese nitride alloy is obtained...

Embodiment 2

[0026] The high-temperature self-propagating synthesis method of silicon-manganese nitride alloy comprises the following steps:

[0027] (1) Calculate the ingredients according to the quality requirements for silicon manganese nitride;

[0028] (2) With 75 ferrosilicon and ferromanganese powder as raw material, weigh according to batching calculation, the raw material particle size is less than 300 mesh, add chemical stimulant, the chemical stimulant add-on is 1% of raw material weight;

[0029] (3) Carry out dry powder mixing and homogenization;

[0030] (4) Load the homogenized and mixed powder into a reaction boat, put it into a high-temperature self-propagating furnace, and after vacuuming, feed high-purity nitrogen, and the pressure is controlled at 10MPa;

[0031] (5) With the help of external thermal excitation, ignition and local reaction are induced;

[0032] (6) The reaction proceeds to nitriding spontaneously, and the silicon-manganese nitride alloy is obtained wi...

Embodiment 3

[0034] The high-temperature self-propagating synthesis method of silicon-manganese nitride alloy comprises the following steps:

[0035] (1) Calculate the ingredients according to the quality requirements for silicon manganese nitride;

[0036] (2) weighing with 75 ferrosilicon and ferromanganese powder as raw material according to batching calculation, raw material particle size is less than 300 mesh, add chemical stimulant, and chemical stimulant add-on is 5% of raw material weight;

[0037] (3) Carry out dry powder mixing and homogenization;

[0038] (4) Load the homogenized and mixed powder into a reaction boat, put it into a high-temperature self-propagating furnace, and after vacuuming, feed high-purity nitrogen, and the pressure is controlled at 10MPa;

[0039] (5) With the help of external thermal excitation, ignition and local reaction are induced;

[0040] (6) The reaction spontaneously proceeds to nitriding, and the reaction process takes 40 minutes to obtain a si...

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Abstract

The invention relates to a preparation method of an alloy material, in particular to a high-temperature self-propagating synthesis method of silicon-manganese nitride alloy. 75 silicon iron powder and ferromanganese iron powder are used as raw materials and are calculated and weighed according to proportion, a chemical stimulation agent is added, a uniformized and evenly-mixed power body is filled into a reaction boat, the reaction boat is put into a high-temperature self-propagating furnace to be subjected to vacuum pumping, high-purity nitrogen is led into the furnace, the pressure is controlled to be 10 MPa, and fire lighting is performed through external thermal excitation to induce local reaction. The silicon-manganese nitride alloy is obtained after reaction. The preparation method is short in technological process, low in production cost, high in reaction speed and capable of saving energy, and no hazardous substance is discharged in the whole technological process.

Description

technical field [0001] The invention relates to a preparation method of an alloy material, in particular to a high-temperature self-propagating synthesis method of a silicon-manganese nitride alloy. Background technique [0002] Silicon manganese nitride is one of the important microalloying materials. The existing patent CN 101514406A discloses a production method of silicon-manganese nitride alloy, which mainly adopts the vacuum sintering method. The silicon-manganese alloy and ferrosilicon alloy are crushed and mixed, then put into the converter, nitrogen is passed through vacuum, and heated to 200-600°C. React for 1-10 hours; the reaction product is pulverized again, mixed with iron powder, added with binder, pelletized, preliminarily sintered in the converter, fed with nitrogen, reacted for 2-10 hours, pulverized again, mixed with carbon powder, added with binder , re-balling; the pellets are heated in a vacuum sintering furnace and finally cooled to room temperature a...

Claims

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Application Information

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IPC IPC(8): C22C1/10
Inventor 刘福东齐文斌徐信陈德礼许威陈曦高海军申林张长远刘树会
Owner 白城福佳科技有限公司
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