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High-nitrogen composite alloy and preparation method thereof

A composite alloy, high nitrogen technology, applied in the field of metallurgy, can solve the problems of low nitrogen content and unstable quality of high nitrogen steel bars, and achieve the effect of increasing nitrogen content, avoiding cracking and spalling, and providing strength

Active Publication Date: 2019-02-22
河北诺凡新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The invention proposes a high-nitrogen composite alloy and its preparation method, which solves the problems of unstable quality and low nitrogen content of high-nitrogen steel bars in the prior art

Method used

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  • High-nitrogen composite alloy and preparation method thereof

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Embodiment 1

[0029] A method for preparing a high-nitrogen composite alloy, comprising the following steps:

[0030] S1. Material preparation: Weigh 55 parts of ferrotitanium powder, 23 parts of ferroniobium powder, 10 parts of ferrosilicon nitride, 10 parts of chromium nitride, 1 part of silicon manganese nitride, 1 part of rare earth lanthanum, 3.5 parts of vinyl acetate, 1.5 parts of dicyclohexyl dicarboxylate, 5 parts of ethanol, 0.05 parts of Span-60, set aside;

[0031] Among them, the titanium content in ferro-titanium powder is 35-75%, the niobium content in ferroniobium powder is 50-70%, the nitrogen content in ferrosilicon nitride is 25-32%, and the nitrogen content in silicon-manganese nitride is 20-25%. %, the nitrogen content in chromium nitride is 5-10%;

[0032] S2. Premix 1: add ferro-titanium powder, ferroniobium powder, ferrosilicon nitride, chromium nitride, silicon-manganese nitride, and rare earth lanthanum into a high-speed ball mill and mix for 40 minutes until even...

Embodiment 2

[0039] A method for preparing a high-nitrogen composite alloy, comprising the following steps:

[0040]S1. Material preparation: Weigh 25 parts of ferrotitanium powder, 55 parts of ferroniobium powder, 16 parts of ferrosilicon nitride, 16 parts of chromium nitride, 6 parts of silicon manganese nitride, 2 parts of rare earth lanthanum, 4.5 parts of vinyl acetate, 1.7 parts of dicyclohexyl dicarboxylate, 6 parts of ethanol, 0.06 parts of Span-60, set aside;

[0041] Among them, the titanium content in ferro-titanium powder is 35-75%, the niobium content in ferroniobium powder is 50-70%, the nitrogen content in ferrosilicon nitride is 25-32%, and the nitrogen content in silicon-manganese nitride is 20-25%. %, the nitrogen content in chromium nitride is 5-10%.

[0042] S2. Premix 1: add ferro-titanium powder, ferroniobium powder, ferrosilicon nitride, chromium nitride, silicon-manganese nitride, and rare earth lanthanum into a high-speed ball mill and mix for 45 minutes until uni...

Embodiment 3

[0049] A method for preparing a high-nitrogen composite alloy, comprising the following steps:

[0050] S1. Material preparation: Weigh 40 parts of ferrotitanium powder, 40 parts of ferroniobium powder, 15 parts of ferrosilicon nitride, 13 parts of chromium nitride, 5 parts of silicon manganese nitride, 3 parts of rare earth lanthanum, 5 parts of vinyl acetate, 2 parts of dicyclohexyl dicarboxylate, 7 parts of ethanol, 0.07 part of Span-60, set aside;

[0051] Among them, the titanium content in ferro-titanium powder is 35-75%, the niobium content in ferroniobium powder is 50-70%, the nitrogen content in ferrosilicon nitride is 25-32%, and the nitrogen content in silicon-manganese nitride is 20-25%. %, the nitrogen content in chromium nitride is 5-10%.

[0052] S2. Premix 1: Add ferrotitanium powder, ferroniobium powder, ferrosilicon nitride, chromium nitride, silicon manganese nitride, and rare earth lanthanum into a high-speed ball mill and mix for 50 minutes until uniforml...

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Abstract

The invention belongs to the technical field of metallurgy, and provides a high-nitrogen composite alloy which is prepared from the following components in percentage by weight: 5 to 20 percent of nitrogen, 15 to 40 percent of titanium, 15 to 40 percent of niobium, 10 to 20 percent of chromium, 10 to 20 percent of silicon, 2 to 10 percent of manganese, 1 to 5 percent of rare earth lanthanum, lessthan or equal to 1.0 percent of carbon, less than or equal to 0.06 percent of sulfur, and less than or equal to 0.1 percent of phosphorus. A preparation method comprises the steps of premixing raw material, then mixing, rising temperature, pretreating, then rising temperature for three times under the vacuum condition, preserving heat, pressing and firing. According to the prepared high-nitrogen composite alloy, the nitrogen content is remarkably improved, and a reinforcing steel bar using the high-nitrogen composite alloy has high tensile strength and bending strength, good shock resistance,good toughness and excellent mechanical property. The high-nitrogen composite alloy provided by the invention solves the problems of instable quality and low nitrogen content of the high-nitrogen reinforcing steel bar in the prior art.

Description

technical field [0001] The invention belongs to the technical field of metallurgy, and relates to a high-nitrogen composite alloy and a preparation method thereof. Background technique [0002] As we all know, vanadium is an element that strongly forms austenite and expands the austenite zone. In the production process of rebar, vanadium is generally one of the elements that must be added. The amount of vanadium added varies from 0.2-1.0 kg / ton of steel, but vanadium is rare. Precious metals, the single use of vanadium in the production of steel bars will result in high production costs. Nitrogen is a strong austenite-forming element. Nitrogen is a strong stabilizing element for the austenite phase in steel bars, and nitrogen is easier to dissolve in the austenite phase than carbon, and has the effect of inhibiting the precipitation of carbides in steel. At the same time, it can effectively improve the strength and corrosion resistance of steel. Nitrogen exists widely in th...

Claims

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Application Information

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IPC IPC(8): B22F3/10B22F1/00C22C1/05C22C14/00C22C27/02C22C30/00C22C35/00C22C1/10
CPCC22C1/05C22C14/00C22C27/02C22C30/00C22C35/00B22F3/1007B22F3/1017B22F2999/00B22F2201/20B22F1/10B22F3/10
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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