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Austenite stainless steel and a manufacturing technology thereof

A technology of austenitic stainless steel and manufacturing process, which is applied in the field of nuclear materials, can solve the problems of demanding materials and complex working conditions, and achieve the effects of enhancing bonding force, weakening the recovery process, and high melting point

Active Publication Date: 2014-09-10
NUCLEAR POWER INSTITUTE OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, such as 310 stainless steel, which is commonly used in nuclear power, has good comprehensive performance, so it is often used in the core or more irradiated parts. However, as one of the fourth-generation nuclear reactor types, the supercritical water-cooled reactor (SCWR) has It is more complex and has more stringent requirements for materials. The current 310S cannot fully meet the requirements of the fourth-generation nuclear reactor supercritical operating conditions. Therefore, it is necessary to develop a fuel cladding material suitable for supercritical water-cooled reactors. Austenitic stainless steel is essential

Method used

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Examples

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Effect test

Embodiment 1

[0055] A manufacturing process of austenitic stainless steel, comprising the following steps carried out in sequence: Step 1, batching, by weight percentage, consists of the following components: Si: 0.20%, Mn: 0.50%, Ni: 19.00%, Cr : 25.00%, Mo: 2.88%, Ca: 0.05%, and the balance is high-purity iron and impurities; step 2, thin-walled 45 # The steel casting mold and magnesia crucible are placed in a high-temperature drying oven and heated to 500 ° C, and kept for 7 hours for degassing; step 3, the thin-walled 45 # The steel casting mold and magnesia crucible are taken out from the high-temperature drying oven, and the ingredients Fe, Cr and Ni are put into the crucible, the vacuum induction furnace is turned on, and the thin-walled 45 # The steel casting mold and the magnesia crucible with Fe, Cr and Ni ingredients are placed at the bottom and middle of the vacuum induction furnace, and then the ingredients Mo, Si, Mn and deoxidizer Ca are placed in the feeder at the upper par...

Embodiment 2

[0058] A manufacturing process of austenitic stainless steel, comprising the following steps carried out in sequence: Step 1, batching, by weight percentage, consists of the following components: Si: 0.50%, Mn: 1.00%, Ni: 20.00%, Cr : 24.00%, Mo: 2.72%, Ca: 0.08%, and the balance is high-purity iron and impurities; step 2, thin-walled 45 # The steel casting mold and magnesia crucible are placed in a high-temperature drying oven and heated to 1200 ° C, and kept for 1 hour for degassing; step 3, thin-walled 45 # The steel casting mold and magnesia crucible are taken out from the high-temperature drying oven, and the ingredients Fe, Cr and Ni are put into the crucible, the vacuum induction furnace is turned on, and the thin-walled 45 # The steel casting mold and the magnesia crucible with Fe, Cr and Ni ingredients are placed at the bottom and middle of the vacuum induction furnace, and then the ingredients Mo, Si, Mn and deoxidizer Ca are placed in the feeder at the upper part of...

Embodiment 3

[0061] A manufacturing process of austenitic stainless steel, comprising the following steps carried out in sequence: Step 1, batching, by weight percentage, consists of the following components: Si: 0.70%, Mn: 1.50%, Ni: 22.00%, Cr : 23.00%, Mo: 2.65%, Ca: 0.1%, and the balance is high-purity iron and impurities; step 2, thin-walled 45 # The steel casting mold and magnesia crucible are placed in a high-temperature drying oven and heated to 200°C, and kept for 10 hours for degassing; step 3, thin-walled 45 # The steel casting mold and magnesia crucible are taken out from the high-temperature drying oven, and the ingredients Fe, Cr and Ni are put into the crucible, the vacuum induction furnace is turned on, and the thin-walled 45 # The steel casting mold and the magnesia crucible with Fe, Cr and Ni ingredients are placed at the bottom and middle of the vacuum induction furnace, and then the ingredients Mo, Si, Mn and deoxidizer Ca are placed in the feeder at the upper part of t...

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Abstract

The invention discloses austenite stainless steel comprising, by weight: C <=0.08%, Si 0.20%-0.70%, Mn 0.50%-1.50%, Ni 19.00%-22.00%, Cr 23.00%-25.00%, Mo 2.65%-2.88%, P <0.005%, S <0.005% and Co < 0.01%. The rest is Fe and impurities. The invention also discloses a manufacturing technology of the above-mentioned austenite stainless steel. The stainless steel of this invention has good creeping performance, oxidation performance, corrosion performance and so on. The stainless steel has good neutron economic performance and cost economic performance. The stainless steel has good anti-neutron void swelling performance, can meet the application needs of SCWR fuel canning or reactor internals, and can provide candidate materials for SCWR. In addition, the stainless steel can also meet the needs of constantly enhanced nuclear reactor temperature, safety and economy.

Description

technical field [0001] The invention belongs to the technical field of nuclear materials, in particular to an austenitic stainless steel and a manufacturing process thereof for supercritical water-cooled reactor fuel cladding materials. Background technique [0002] Stainless steel is an important structural material in reactor systems. There are many types of stainless steel with different properties. Among them, austenitic stainless steel is widely used in the nuclear industry due to its good corrosion resistance and weldability, excellent thermal strength and cold and hot processing properties, and good comprehensive properties of strength, plasticity and toughness after cold deformation. is widely used. [0003] At present, 310 stainless steel, which is commonly used in nuclear power, has good comprehensive performance, so it is often used in the core or more irradiated parts. However, as one of the fourth-generation nuclear reactor types, the supercritical water-cooled...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/52C22C38/44C22C33/04C21D8/02C22B9/20C22C30/00C22C1/02C22F1/00
Inventor 熊茹潘钱付张亮解怀英刘桂良唐睿陈勇
Owner NUCLEAR POWER INSTITUTE OF CHINA
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