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A kind of preparation method of high-density oxide dispersion strengthened steel

A technology of dispersion strengthening and oxide, which is applied in the field of preparation of high-density oxide dispersion strengthening steel, and can solve the problems that the performance of ODS steel cannot meet the ideal requirements for use.

Active Publication Date: 2021-09-17
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] Aiming at the problem that the density of the nano-rare earth oxides in the ODS steel prepared by the existing conventional technology cannot meet the ideal use requirements due to the low density of the prepared ODS steel, the present invention provides a The preparation method of high-density oxide dispersion strengthened steel can prepare ODS steel with extremely high density nano-rare earth oxides, and the performance of the prepared ODS steel is greatly improved

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  • A kind of preparation method of high-density oxide dispersion strengthened steel
  • A kind of preparation method of high-density oxide dispersion strengthened steel

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preparation example Construction

[0035] like figure 1 Shown, a high-density oxide dispersion strengthened steel production method, by way of melting, rolling and heat treatment processes to be prepared in combination ODS steel, comprising the steps of:

[0036] First, the steel substrate placed in a crucible, a melting chamber of the furnace for scrubbing under vacuum, low vacuum condition twice, pulls out under high vacuum, evacuated 5 × 10 -3 Pa, and then backfilled with argon to 0.05MPa, forms a protective atmosphere. Open melting power, adjust the current size of the observed melting, the crucible steel material to be completely melted to form a homogeneous molten steel. Was added directly to the molten steel oxygen carrier particles, the melting temperature is controlled to a set temperature (determined according to the melting point of the steel substrate), added oxygen carrier particles melting after a predetermined time (determined according to the oxygen carrier particles), the oxygen carrier particles do...

Embodiment 1

[0043] Choosing as the 316L steel matrix, TiO 2 As the oxygen carrier particles, rare earth Y selected block, the synthesis reaction of the solid melting + 316L-ODS steel.

[0044] Steel ingredients percentage of total mass: C: 0.03%, Si: 1.00%, Mn: 2.00%, P: 0.045%, S: 0.03%, Cr: 16.0%, Ni: 12.0%, Mo: 2.00%, Y: 0.2%, Ti: 0.25%, the balance being Fe and unavoidable impurities.

[0045] Specific steps are as follows:

[0046] A, 316L will be placed in a crucible, the furnace chamber was evacuated to vacuum, low vacuum conditions scrubbing twice, pulls out under high vacuum, evacuated 5 × 10 -3 Pa, and then backfilled with argon to 0.05MPa, forms a protective atmosphere. Open melting power, adjust the current size of the observed melting, the melting temperature is about 1500 deg.] C, the melting time of 1 to 5 minutes, until starting material is completely melted in the crucible, crucible to obtain molten steel in the melting crucible. At this time, the oxygen carrier particles 5mm...

Embodiment 2

[0050] Pure iron selected as a substrate, TiO 2 As the oxygen carrier particles, Er rare earth selected block, a solid state reaction smelting + Synthesis ODS steel.

[0051] Steel ingredients percentage of total mass: C: 0.03%, Si: 1.00%, Mn: 2.00%, P: 0.045%, S: 0.03%, Cr: 16.0%, Ni: 12.0%, Mo: 2.00%, Er: 0.2%, Ti: 0.25%, the balance being Fe and unavoidable impurities.

[0052] Specific steps are as follows:

[0053] First, the iron placed in a crucible, a furnace chamber for scrubbing under vacuum, low vacuum condition twice, pulls out under high vacuum, evacuated 5 × 10 -3 Pa, and then backfilled with argon to 0.05MPa, forms a protective atmosphere. Open melting power, adjust the current size of the observed melting, the melting temperature is about 1600 deg.] C, the melting time of 1 to 5 minutes, until starting material is completely melted in the crucible, crucible to obtain molten steel in the melting crucible. At this time, the oxygen carrier particles 5mm TiO 2 After ad...

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Abstract

The invention discloses a preparation method of high-density oxide dispersion strengthened steel, which belongs to the field of metal material preparation. The steps are as follows: 1. Put the steel matrix in a container and melt it into molten steel. After the steel matrix is ​​completely melted, add oxygen carrier particles to the molten steel to continue smelting, mix the oxygen carrier particles with the molten steel, and cool to obtain an ingot; 2. Put the steel matrix in a container and melt it into molten steel. After the steel matrix is ​​completely melted, add rare earth elements to the molten steel to form a molten steel containing rare earth elements; 3. Add the ingot to the molten steel containing rare earth elements Carrying out smelting to dissolve the ingot, the oxygen carrier particles in the ingot are partially dissolved to obtain a melt, and the melt is cooled to obtain a cast slab; 4. Rolling and heat treating the cast slab to obtain ODS steel. The invention can prepare the ODS steel with extremely high-density nano rare earth oxides, and the performance of the prepared ODS steel is greatly improved.

Description

Technical field [0001] The present invention belongs to the field of preparation of the metal material, and more particularly, to a method for preparing a high-density oxide dispersion strengthened steel. Background technique [0002] Oxide dispersion strengthened steel, referred to as ODS steel, a metallic material having excellent high temperature creep and radiation performance. The presence of a large number of dispersed reinforcing oxide ODS steel phase, which phase dispersion strengthening body pinned dislocations and grain boundaries impede dislocation slip through a large number of nano-sized oxides, and thus play a role in strengthening. Further, these reinforcing phase having excellent high-temperature stability, long-term performance at high large number of ions and neutron irradiation environment. Thus, in view of its excellent mechanical properties, high temperature stability and anti-radiation properties, ODS steel has become the fourth generation reactors and fusio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C33/04C21C7/00C22C38/02C22C38/04C22C38/58C22C38/44C22C38/50
CPCC21C7/0006C21C7/0037C22C33/04C22C38/005C22C38/02C22C38/04C22C38/44C22C38/50C22C38/58
Inventor 宋长江沈楚伦张健康张云虎翟启杰
Owner SHANGHAI UNIV