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Micro-nano-TiC particle reinforced steel and preparation method thereof

A particle-strengthening and nano-technology, applied in the field of high-performance structural steel preparation, can solve the problem of uneven dispersion, achieve the effects of stable interface bonding, promoting dispersion and improving wettability

Inactive Publication Date: 2018-12-18
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Another object of the present invention is to endogenous two-phase TiC-TiB 2 The master alloy of ceramic particles pre-dispersed is the carrier of nanoparticles, and the nanoparticles are gradually released into the melt of steel through the master alloy of nanoparticles, which promotes the dispersion of nanoparticles, solves the problem of uneven dispersion, and effectively realizes the microstructure of steel. Thinning and Toughening

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  • Micro-nano-TiC particle reinforced steel and preparation method thereof
  • Micro-nano-TiC particle reinforced steel and preparation method thereof
  • Micro-nano-TiC particle reinforced steel and preparation method thereof

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preparation example Construction

[0051] The present invention also provides a method for preparing micro-nano TiC particle reinforced steel, which includes the following steps:

[0052] Step 1. After mixing carbon nanotubes, carbon black, iron powder, and titanium powder into a mixed powder, prepare a cylindrical Fe-Ti-C compact;

[0053] Step two: preparing the pre-dispersed master alloy of nanometer TiC particles by in-situ sintering the Fe-Ti-C compact;

[0054] Step 3: Disperse the nano-TiC particle pre-dispersed master alloy in the molten steel through a non-oxidation steelmaking process, and prepare a small amount of in-situ nano-TiC particles to strengthen and toughen ordinary carbon steel through a casting process;

[0055] Step 4: The micro-in-situ nano-TiC particles are strengthened and toughened ordinary carbon steel in sequence through homogenization treatment process, grain ultra-refining treatment process, and tempering process to obtain micro-nano-TiC particle reinforced steel.

[0056] The purity of the...

Embodiment 1

[0137] This embodiment provides a method for improving the strength and toughness of steel with trace nano-ceramic particles, which includes the following steps:

[0138] Step 1. The preparation of compacts containing cylindrical Fe-Ti-C is as follows:

[0139] Pretreatment of reactant powder by ball milling and preparation of reaction compacts:

[0140] a. Put 2 grams of carbon nanotubes (with a purity of 90wt.%) into a ball milling tank, and put the prepared reactant powder and zirconia grinding balls into a mixing tank. The diameter of the tank is 5mm, 7mm, 11mm, 15mm, 20mm, 22mm ZrO 2 Balls, 4 of each, ZrO 2 The ball mass is 320g, the ball-to-material ratio is set to 115:1, and the carbon nanotubes are activated by high-speed ball milling at a speed of 200r / min for 2h with a planetary ball mill.

[0141] b. Add 2 grams of carbon black (amorphous carbon) to the ball mill tank after 2 grams of carbon nanotube ball milling treatment, 80g of 300 mesh pure iron powder with a purity of ...

Embodiment 2

[0160] The method for improving the strength and toughness of steel with trace nano-ceramic particles of this embodiment is characterized in that it comprises the following steps:

[0161] Step 1. The preparation of cylindrical Fe-Ti-C compact is as follows:

[0162] Pretreatment of reactant powder by ball milling and preparation of reaction compacts:

[0163] a. Put 7 grams of carbon nanotubes (purity of 90wt.%) into a ball milling tank, and put the prepared reactant powder and zirconia grinding balls into a mixing tank. The diameter of the tank is 5mm, 7mm, 11mm, 15mm, 20mm, 22mm ZrO 2 Balls, 10 of each, ZrO 2 The ball mass is 600g, the ball-to-material ratio is set to 135:1, and the carbon nanotubes are activated by high-speed ball milling at a speed of 300r / min for 3h with a planetary ball mill.

[0164] b. Add 65 g of 1000 mesh pure iron powder with a purity of 99.0 wt.% to the 7 g of carbon nanotube ball milling tank; 28 g of 800 mesh titanium powder with a purity of 99.0 wt.%, ...

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Abstract

The invention discloses micro-nano-TiC particle reinforced steel. The micro-nano-TiC particle reinforced steel comprises the chemical compositions of, by mass, 0.38-0.50% of C, 0.17-0.37% of Si, 0.50-0.80% of Mn, less than or equal to 0.035% of P, less than or equal to 0.035% of S, 0.8-1.1% of Cr, less than or equal to 0.25% of Ni, less than or equal to 0.25% of Cu, 0.006-0.14% of TiC with the content being 20-35%, and the balance Fe. Nano-particle intermediate alloy is used for taking nanoparticles into the steel to be used as a flexibilizer and to optimize the numerical range of the reinforced steel compositions, and the plasticity and toughness of the reinforced steel are improved on the premise that the properties of the reinforced steel are ensured.

Description

Technical field [0001] The invention relates to the field of high-performance structural steel preparation, in particular to a micro-nano TiC particle reinforced steel and a preparation method thereof. Background technique [0002] Steel is a structural material that integrates the advantages of rich resources, large production scale, easy processing, diverse performance, low cost, easy use and recyclability, and is the most widely used basic raw material in production and life. Steel materials are still a structural material that cannot be replaced for a long period of time, and are the key material foundation for social development. The level of industrial manufacturing is an important indicator to measure the level of social economy. In the rapidly developing modern society, people have put forward higher requirements for the technology and performance of steel materials, such as: underground and marine facilities, large-span heavy-duty bridges, lightweight energy-saving vehic...

Claims

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Application Information

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IPC IPC(8): C22C38/02C22C38/04C22C38/42C22C33/06C21D6/00C21D1/18C21D1/773
Inventor 邱丰常芳姜启川赵庆龙方建儒
Owner JILIN UNIV
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