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Mixed scale TiCN and TiB2 particle strengthened low alloy steel and preparation method thereof

A low-alloy steel, strengthening and toughening technology, applied in the field of high-performance structural steel preparation, can solve the problems of difficult nanoparticles, high temperature of molten steel, inability to stir and disperse ultrasonically, reducing the efficiency of nano-particle strengthening steel, etc., to improve plastic toughness. Effect

Inactive Publication Date: 2018-12-21
JILIN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the difference in specific gravity between nano-sized ceramic particles and molten steel is large, and it is very difficult to add nanoparticles to molten steel. Even if they are added to molten steel, the dispersion of nanoparticles in molten steel is the most difficult problem to solve. The high temperature of molten steel cannot be stirred and ultrasonic dispersion
The ceramic particles in molten steel can easily float up and become steel slag to be removed, thus greatly reducing the efficiency of nanoparticle-strengthened steel

Method used

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  • Mixed scale TiCN and TiB2 particle strengthened low alloy steel and preparation method thereof
  • Mixed scale TiCN and TiB2 particle strengthened low alloy steel and preparation method thereof
  • Mixed scale TiCN and TiB2 particle strengthened low alloy steel and preparation method thereof

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preparation example Construction

[0051] The present invention also provides a hybrid scale TiCN and TiB 2 A method for preparing particle-strengthened and toughened low-alloy steel, comprising the steps of:

[0052] Step 1: Press B 4 The molar ratio of C and BN is 1:1, respectively weigh a certain amount of B 4 C and BN powder are spare, where B 4 The particle size of C powder is 0.5-6.5 μm; the particle size of BN powder is 0.5-1.3 μm. BN powder and B 4 C powder is put into a ball mill jar, and the powder is activated by a planetary ball mill at a speed of 100-300r / min for 2-5 hours to obtain B 4 Mixed powder of C and BN.

[0053] Step 2: Weigh Al powder, Ti powder and B in proportion 4 C and BN mixed powder, the particle size of aluminum powder is 13-48μm; the particle size of titanium powder is 13-45μm, to obtain Al-Ti-B 4 C-BN mixed powder,

[0054] Among them, Al: 60-80%, Ti: 13.16-26.31%, B 4 C: 4.72-9.45%, BN: 2.12-4.24%, the Ti, B 4 The molar ratio of C and BN is 9:2.8:2.8;

[0055] Step 3:...

Embodiment 1

[0086] Step 1: Press B 4 The molar ratio of C and BN is 1:1, respectively weigh a certain amount of B 4 C and BN powder are spare, where B 4 The particle size of C powder is 0.5 μm; the particle size of BN powder is 1.3 μm. BN powder and B 4 C powder was put into a ball mill jar, and the powder was activated by a planetary ball mill at a speed of 100r / min for 5 hours to obtain B 4 Mixed powder of C and BN.

[0087] Step 2: Weigh Al powder, Ti powder and B in proportion 4 C and BN mixed powder, the particle size of aluminum powder is 13 μm; the particle size of titanium powder is 13 μm, to obtain Al-Ti-B 4 C-BN mixed powder,

[0088] Among them, Al: 70g, Ti: 19.73g, B 4 C: 7.09g, BN: 3.18g, the Ti, B 4 The molar ratio of C and BN is 9:2.8:2.8;

[0089] Step 3: Al-Ti-B 4 The C-BN mixed powder was placed in a ball mill tank, installed in a planetary mixer, and the mixer was uniformly mixed at a speed of 80r / min for 8h. Among them, ZrO with a diameter of 5 mm to 22 mm i...

Embodiment 2

[0112] Step 1: Press B 4 The molar ratio of C and BN is 1:1, respectively weigh a certain amount of B 4 C and BN powder are spare, where B 4 The particle size of C powder is 6.5 μm; the particle size of BN powder is 0.5 μm. BN powder and B 4 C powder was put into a ball mill jar, and the powder was activated by a planetary ball mill at a speed of 100r / min for 3 hours to obtain B 4 Mixed powder of C and BN.

[0113] Step 2: Weigh Al powder, Ti powder and B in proportion 4 C and BN mixed powder, the particle size of aluminum powder is 25 μm; the particle size of titanium powder is 45 μm, to obtain Al-Ti-B 4 C-BN mixed powder,

[0114] Among them, Al: 70g, Ti: 19.73g, B 4 C: 7.09g, BN: 3.18g, the Ti, B 4 The molar ratio of C and BN is 9:2.8:2.8;

[0115] Step 3: Al-Ti-B 4 The C-BN mixed powder was placed in a ball mill tank, installed in a planetary mixer, and the mixer was uniformly mixed at a speed of 40r / min for 20h. Among them, ZrO with a diameter of 5 mm to 22 mm ...

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Abstract

The invention discloses a mixed scale TiCN and TiB2 particle strengthened low alloy steel. The mixed scale TiCN and TiB2 particle strengthened low alloy steel is prepared from, by mass, 0.38-0.50% ofC, 0.50-0.80% of Mn, 0.17-0.37% of Si, 0.035% or less of P, 0.035% or less of S, 0.8-1.1% of Cr, 0.25% or less of Ni, 0.25% or less of Cu, 0.018-0.28% of Al, 0.009-0.16% of TiCN and TiB2 and the balance Fe. The invention provides a preparation method of the mixed scale TiCN and TiB2 particle strengthened low alloy steel. Mixed scale TiCN and TiB2 particle intermediate alloy is added in low alloy steel melt, the percentage composition of components in the alloy steel is optimized, the mixed scale TiCN and TiB2 particle strengthened low alloy steel is obtained, and plasticity and toughness of the low alloy steel is improved on the premise that the strength of the low alloy steel is ensured by means of the synergistic effect of multi-phase mixed scale particles.

Description

technical field [0001] The invention relates to the field of high-performance structural steel preparation, more specifically, the invention relates to a hybrid scale TiCN and TiB 2 Particle toughened low alloy steel and method for its preparation. Background technique [0002] Compared with the traditional strengthening and toughening technology, the solidification structure and strengthening and toughening technology of micro-mixed-scale particles are uniquely innovative, and can achieve steel structure refinement, nano-particle intragranular and grain boundary strengthening, and nano-precipitated phase refinement. The regulation of chemicalization and distribution, and the integrated regulation of strengthening and toughening. [0003] Nano-sized TiCN particles have the characteristics of high hardness, good toughness, high melting point, and good wear resistance. Since stoichiometric TiC is usually difficult to obtain, its stability at high temperature is poor. And be...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/02C22C38/04C22C38/06C22C38/18C22C38/20C22C38/40C22C38/42C22C33/04C21D1/773C21D1/18
Inventor 邱丰常芳姜启川董柏新赵庆龙
Owner JILIN UNIV
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