Manufacturing method for tube blank made of high-silicon titanium-contained austenitic stainless steel

A technology of austenitic stainless steel and a manufacturing method, which is applied in the field of manufacturing of high-silicon titanium-containing austenitic stainless steel tube blanks

Active Publication Date: 2018-11-23
CHINA INSTITUTE OF ATOMIC ENERGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing conventional austenitic stainless steel smelting and forging processes cannot meet these requirements

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0107] Embodiment 1: Manufacture and inspection of high-silicon and titanium-containing austenitic stainless steel tube blank (1)

[0108] The diameter of the cladding tube blank prepared in this embodiment is 204mm, and the length is 5000mm (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.

[0109] 1. High-silicon titanium-containing austenitic stainless steel (code CN-1515) batching vacuum induction furnace smelting

[0110] (1) Use a 6-ton vacuum induction furnace for smelting, and vacuumize the smelting chamber to ≤ 1.0Pa when the furnace is empty;

[0111] (2) Furnace loading of raw materials;

[0112] (3) Refining after power transmission and melting to chemical purification, the ...

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Abstract

The invention belongs to the technical field of metallurgical materials, and relates to a manufacturing method for a tube blank made of high-silicon titanium-contained austenitic stainless steel. Themanufacturing method sequentially comprises the following steps that (1) ingredients of the high-silicon titanium-contained austenitic stainless steel are smelted in a vacuum induction furnace; (2) vacuum arc remelting is carried out; and (3) homogenization and forging are carried out, specifically, forging in a rapid forging machine and forging in a precision forging machine are carried out in sequence, wherein in the forging process of the rapid forging machine, the tong handle forging process, the pre-deformation process, the homogenization heat treatment process, the rapid forging processand the cutting process are carried out in sequence, and in the forging sequence of the precision forging machine, the heat preservation process and the precision forging process are carried out in sequence. The manufacturing method for the tube blank made of the high-silicon titanium-contained austenitic stainless steel has the advantage that the produced tube blank can meet the uniformity control requirements of a fast reactor core cladding material on the content of harmful elements O and S, the inclusion level and the tissues in the tube blank.

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 tube blank. Background technique [0002] Fast neutron reactor (hereinafter referred to as fast reactor) is a fourth-generation nuclear energy system. Compared with previous reactors, its core components, especially fuel components, must achieve higher burnup at higher temperatures. The fuel rods in the components Integrity is strongly dependent on whether the cladding material can withstand high-dose radiation (above 100dpa) at high temperatures (350-700°C). Therefore, for fast reactor fuel assembly cladding materials, the main performance requirements include: good radiation resistance, especially good radiation swelling resistance; good high temperature mechanical properties; good compatibility with fuel and coolant; Capacitance. [0003] Austenitic stainless steel is widel...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21C7/00C21D1/00C21D6/00C21D8/10C21D9/08C22B9/04C22B9/16C22C33/04C22C38/02C22C38/04C22C38/06C22C38/42C22C38/44C22C38/46C22C38/50C22C38/52C22C38/54C22C38/58B21J1/04
CPCB21J1/003B21J1/04C21C7/0006C21D1/00C21D6/004C21D6/005C21D6/007C21D6/008C21D8/105C21D9/08C22B9/04C22B9/16C22C33/04C22C38/001C22C38/002C22C38/02C22C38/04C22C38/06C22C38/42C22C38/44C22C38/46C22C38/50C22C38/52C22C38/54C22C38/58Y02P10/25
Inventor 杜爱兵冯伟任媛媛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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