Manufacturing method of high-silicon titanium-containing outer sleeve made of austenitic stainless steel

A technology of austenitic stainless steel and a manufacturing method, which is applied in the manufacturing field of an outer casing made of high-silicon titanium-containing austenitic stainless steel, and can solve the problems that the manufacturing process cannot be satisfied.

Inactive Publication Date: 2018-12-28
CHINA INSTITUTE OF ATOMIC ENERGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In view of the high requirements for the hot extrusion, cold rolling, heat treatment, ultrasonic flaw detection process of the high-silicon titanium-containing austenitic stainless steel outer casing, the current conventional austenitic stainless steel outer casing manufacturing process cannot meet these requirements

Method used

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  • Manufacturing method of high-silicon titanium-containing outer sleeve made of austenitic stainless steel
  • Manufacturing method of high-silicon titanium-containing outer sleeve made of austenitic stainless steel

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Experimental program
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Effect test

Embodiment 1

[0071] Embodiment 1: Manufacture and inspection of high-silicon and titanium-containing austenitic stainless steel outer casing (1)

[0072] The size of the outer casing prepared in this embodiment is the outer distance from the edge of 115 × 3 wall thickness (mm) (the weight percentage of the finished product is composed as follows: C: 0.62%, Si: 0.83%, P: 0.008%, S: 0.0010%, Mn: 1.56%, Ni: 14.92%, Cr: 16.17%, Mo: 2.11%, Ti: 0.45%, Co: <0.01%, B: 0.004%, N: 0.0050%, V: 0.19%, O: ≤0.0008%, Cu: ≤0.01%, Al: ≤0.03%, As: <0.003%, Mg<0.002%, Ca<0.005%, and the rest is Fe), including the following steps.

[0073] (1) Smelting

[0074] A 6-ton vacuum induction furnace is used for vacuum induction smelting of high-silicon-titanium-containing austenitic stainless steel (codenamed CN-1515), and a vacuum consumable furnace is used for consumable remelting. The chemical composition of the finished consumable ingot meets the chemical composition requirements.

[0075] (2) forging

[007...

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Abstract

The invention belongs to the technical field of metallurgical materials, and relates to a manufacturing method of a high-silicon titanium-containing outer sleeve made of austenitic stainless steel. The manufacturing methods sequentially comprises the following steps of (1) smelting, (2) forging, (3) hot extrusion, (4) intermediate cold rolling and intermediate heat treatment, (5) final heat treatment, and (6) final cold rolling. By utilizing the manufacturing method of the high-silicon titanium-containing outer sleeve made of the austenitic stainless steel, the manufactured outer sleeve can meet strict requirements of the aspects such as alloy component, structure uniformity, dimensional precision and surface quality.

Description

technical field [0001] The invention belongs to the technical field of metallurgical materials, and relates to a method for manufacturing a high-silicon-titanium-containing austenitic stainless steel outer casing. Background technique [0002] Fast neutron reactor (hereinafter referred to as fast reactor) is a fourth-generation nuclear energy system, and its core components, especially fuel components, must achieve higher burnup at higher temperatures than previous reactors. The hexagonal outer sleeve in the fast reactor fuel assembly is one of the most important parts in the reactor core. It is corroded by the coolant and fission products. It works in the temperature range of 358-650°C for a long time, and is irradiated with a high dose of more than 100dpa. Under the action of coolant pressure difference, elastic deformation will occur, and under the action of temperature field and neutron field, thermal expansion, irradiation swelling and irradiation creep will occur, resu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/02C22C38/04C22C38/58C22C38/44C22C38/50C22C38/52C22C38/54C22C38/46C22C38/42C22C38/06C22C33/04C21C7/10C21D8/10B21C37/06
CPCB21C37/06C21C7/10C21D8/105C22C33/04C22C38/02C22C38/04C22C38/06C22C38/42C22C38/44C22C38/46C22C38/50C22C38/52C22C38/54C22C38/58
Inventor 任媛媛杜爱兵冯伟李峻宏苏喜平王明政黄晨杨孔雳杨红义张东辉
Owner CHINA INSTITUTE OF ATOMIC ENERGY
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