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High-nitrogen silicon-titanium alloy and production method thereof

A technology of a silicon-titanium alloy and a production method, applied in the field of alloys, can solve the problem of low nitrogen content in the alloy, and achieve the effects of increasing the nitrogen content, reducing the difficulty of stirring, and promoting microcrystallization

Pending Publication Date: 2022-07-22
河北诺凡新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention proposes a high-nitrogen silicon-titanium alloy and its production method, which solves the problem that the nitrogen content of the alloy in the prior art is not high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A production method of high nitrogen silicon-titanium alloy, comprising the following steps:

[0027] S1. The ferrotitanium powder (FeTi70) and the ferrosilicon powder (TFeSi75) are uniformly mixed in a ratio of 1:1 and then ground, and ground to a particle size of less than 150 mesh to obtain a mixture;

[0028] S2, adding auxiliary agents to the mixture for secondary stirring, mixing uniformly and then grinding to a particle size of less than 100 mesh, and pressing into a billet; the added mass is 0.5% of the mass of ferrotitanium powder, and the auxiliary agents are calcium boride, sulfite A mixture of ferric ammonium and iridium oxide, the ratio of the three is 3:7:1;

[0029] S3, placing the blank in the kiln, and feeding nitrogen to a pressure of 0.05MPa after vacuuming;

[0030] S4, heat up to 1450 ℃ for 8h, cool to room temperature and release;

[0031] Its chemical composition is calculated by mass percentage, including: titanium 27.6%, silicon 29.4%, nitroge...

Embodiment 2

[0034] A production method of high nitrogen silicon-titanium alloy, comprising the following steps:

[0035] S1. Mix the ferrotitanium powder (FeTi70) and the ferrosilicon powder (TFeSi75) according to the ratio of 1:2, and then grind, and grind to a particle size of less than 150 mesh to obtain a mixture;

[0036] S2, adding auxiliary agents to the mixture for secondary stirring, mixing uniformly and then grinding to a particle size of less than 100 mesh, and pressing into a billet; the added mass is 0.5% of the mass of ferrotitanium powder, and the auxiliary agents are calcium boride, sulfite A mixture of ferric ammonium and iridium oxide, the ratio of the three is 2:8:1;

[0037] S3, the blank is placed in the kiln, and after vacuuming, nitrogen is introduced to a pressure of 0.06MPa;

[0038] S4, raise the temperature to 1450°C for 9h, cool to room temperature and release;

[0039] Its chemical composition is calculated by mass percentage, including: titanium 16.3%, sili...

Embodiment 3

[0042] A production method of high nitrogen silicon-titanium alloy, comprising the following steps:

[0043] S1. The ferrotitanium powder (FeTi70) and the ferrosilicon powder (TFeSi75) are mixed uniformly according to the ratio of 1:2.2 and then ground, and ground to a particle size of less than 150 mesh to obtain a mixture;

[0044] S2, adding auxiliary agents to the mixture for secondary stirring, mixing uniformly and then grinding to a particle size of less than 100 mesh, and pressing into a billet; the added mass is 0.5% of the mass of ferrotitanium powder, and the auxiliary agents are calcium boride, sulfite The mixture of ferric ammonium and iridium oxide, the ratio of the three is 2:6:1;

[0045] S3, placing the blank in the kiln, and feeding nitrogen to a pressure of 0.05MPa after vacuuming;

[0046] S4, heat up to 1450 ℃ for 8h, cool to room temperature and release;

[0047] Its chemical composition is calculated by mass percentage, including: titanium 14.0%, silico...

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Abstract

The invention relates to the technical field of alloys, and provides a high-nitrogen silicon-titanium alloy and a production method thereof.The production method comprises the following steps that S1, ferrotitanium powder and ferrosilicon powder are evenly mixed according to the proportion of 1: (1-2.5) and then ground, and a mixture is obtained; s2, adding an auxiliary agent into the mixture, performing secondary stirring, performing uniform mixing, performing grinding, and performing pressing so as to obtain a blank; s3, the blank is placed in a kiln, vacuumizing is conducted, and nitrogen-containing gas is introduced till the pressure ranges from 0.05 MPa to 0.06 MPa; s4, heating to 1380-1450 DEG C, preserving heat for 5-8 hours, cooling to room temperature, and discharging; in the step S2, the auxiliary agent is a mixture of calcium boride, ammonium ferrous sulfate and iridium oxide. By means of the technical scheme, the problem that in the prior art, the nitrogen content of alloy is not high is solved.

Description

technical field [0001] The invention relates to the technical field of alloys, in particular to a high nitrogen silicon-titanium alloy and a production method thereof. Background technique [0002] High nitrogen silicon-titanium alloy is a new type of steel additive. Nitrogen is a strong austenite forming element. Nitrogen is easier to solid solution than carbon in the austenite phase, and has the effect of inhibiting the precipitation of carbides in the steel, and can effectively improve the The strength and corrosion resistance of steel, nitrogen is widely present in the atmosphere, can replace ferroniobium, ferrovanadium, etc. for steelmaking microalloying, improve the strength of steel and other advantages, the use of this alloy can ensure that the performance of steel meets the requirements of technical specifications. [0003] The conventional processes for preparing high-nitrogen silicon-titanium alloys include liquid nitriding and solid-state nitriding. The nitrogen ...

Claims

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Application Information

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IPC IPC(8): C22C35/00C22C1/05C22C30/00
CPCC22C35/00C22C1/05C22C30/00
Inventor 卢世国李香菊
Owner 河北诺凡新材料科技有限公司
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