Method for preparing oxide dispersion strengthened F/M steel through smelting and casting process

A technology of dispersion strengthening and casting technology, applied in the field of metal materials, can solve the problems of long process, poor single production capacity, complex process, etc., and achieve the effect of reducing the temperature of molten steel and ensuring fluidity

Active Publication Date: 2018-03-23
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The present invention proposes a new smelting and preparation method for ODS steel. Through the thorough improvement of the traditional smelting process and creative work, it overcomes the problems such as complicated process and long process brought by the existing commonly used mechanical alloying process for preparing ODS steel. , poor single production capacity, poor stability between batches and many other problems

Method used

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  • Method for preparing oxide dispersion strengthened F/M steel through smelting and casting process
  • Method for preparing oxide dispersion strengthened F/M steel through smelting and casting process
  • Method for preparing oxide dispersion strengthened F/M steel through smelting and casting process

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Experimental program
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Effect test

Embodiment approach 1

[0037] A kind of ODS RAFM steel prepared based on the above-mentioned novel ODS preparation process, its various components account for the percentage of total mass:

[0038] C: 0.08-0.15%, Cr: 8.0-14%, Mn: 0.45-0.6%, W: 1.0-2.5%, N: 0.05-0.07%, Ta: 0.010-0.20%, Ti: 0.02-0.55%, Si : 0.10~0.15%, V: 0.04~0.5%, O: 30~200ppm B<0.001%, S<0.003%, P<0.005%, Fe balance, Y powder in the mold: 0.05%. The finished product is made through the following steps:

[0039] (a) According to steps 1, 2, 3, and 4 of the preparation method in the present invention, vacuum smelting is used to prepare steel ingots or continuously cast steel rods, with the following components accounting for the percentage of the total mass:

[0040] C: 0.08-0.15%, Cr: 8.0-14%, Mn: 0.45-0.6%, W: 1.0-2.5%, N: 0.05-0.07%, Ta: 0.010-0.20%, Ti: 0.02-0.55%, Si : 0.10~0.15%, V: 0.04~0.5%, O: 30~200ppm B<0.001%, S<0.003%, P<0.005%, Fe balance, Y powder in the mold: 0.05%.

[0041] (b) first hot deformation by forging or ...

Embodiment approach 2

[0047] A kind of ODS RAFM steel prepared based on the above-mentioned novel ODS preparation process, its composition accounts for the percentage of total mass:

[0048] C: 0.08-0.15%, Cr: 8.0-14%, Mn: 0.45-0.6%, W: 1.0-2.5%, N: 0.05-0.07%, Ta: 0.010-0.20%, Ti: 0.02-0.55%, Si : 0.10~0.15%, V: 0.04~0.5%, O: 30~200ppm B<0.001%, S<0.003%, P<0.005%, Fe balance, Y powder in the mold: 0.8%,

[0049] And make a finished product through the following steps:

[0050] (a) According to the steps 1, 2, 3, and 4 of the preparation method in the present invention, vacuum smelting is used to prepare steel ingots or continuously cast steel rods, with the following components accounting for the percentage of the total mass: C: 0.08-0.15%, Cr: 8.0 ~14%, Mn: 0.45~0.6%, W: 1.0~2.5%, N: 0.05~0.07%, Ta: 0.010~0.20%, Ti: 0.02~0.55%, Si: 0.10~0.15%, V: 0.04~ 0.5%, O: 30~200ppm B<0.001%, S<0.003%, P<0.005%, Fe balance, Y powder in the mold: 0.8%;

[0051] (b) first hot deformation by forging or roll...

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Abstract

The invention provides a method for preparing oxide dispersion strengthened F / M steel through the smelting and casting process and belongs to the field of metal materials. The steel comprises 0.08-0.15% of C, 8.0-14% of Cr, 0.45-0.6% of Mn, 1.0-2.5% of W, 0.05-0.07% of N, 0.010-0.20% of Ta, 0.02-0.55% of Ti, 0.10-0.15% of Si, 0.04-0.5% of V, 30-200 ppm of O, less than 0.001% of B, less than 0.003%of S, less than 0.005% of P, 0.01-1% of Y powder in a casting die, and the balance Fe. The rolling temperature of the steel is 800 DEG C-1100 DEG C. The steel is subjected to thermal treatment afterrolling, specifically, is subjected to quenching at 850-1100 DEG C / 15-120 min and is subjected to tempering at 710-800 DEG C / 90-120 min. The oxide dispersion strengthened F / M steel is high in high-temperature strength and low in ductile-brittle transition.

Description

technical field [0001] The invention belongs to the field of metal materials and relates to a new process for preparing oxide dispersion strengthened (ODS) ferritic martensitic (F / M) steel. The ODS steel prepared by this process exhibits outstanding high-temperature strength and high-temperature creep resistance, and has the characteristics of excellent plasticity and high impact toughness. Background technique [0002] The increasing demand for global energy and the continuous improvement of environmental awareness have promoted the development and utilization of clean energy such as nuclear energy. Nuclear reactors are exposed to the harsh environment of high temperature, high pressure and strong radiation for a long time, so structural materials are required to have good high temperature stability, high resistance to radiation swelling, and excellent plastic processing performance at the same time. Ferritic / martensitic steel has become the main candidate structural mater...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D27/20C22C33/04C22C38/04C22C38/22C22C38/26C22C38/28C22C38/02C22C38/24C21D8/00
CPCB22D27/20C21D8/005C22C32/0026C22C33/04C22C38/001C22C38/02C22C38/04C22C38/22C22C38/24C22C38/26C22C38/28C21D2211/008C21D2211/004C21D2211/005C21D6/005C21D6/008C22C38/32C22C38/002C21D6/002
Inventor 燕青芝洪志远
Owner UNIV OF SCI & TECH BEIJING
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