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Method for smelting ultra-pure austenite nuclear grade stainless steel

A technology of austenite and stainless steel, applied in the smelting field of ultra-pure austenitic core grade stainless steel, can solve the problems of unusable and high harmful elements

Active Publication Date: 2012-09-19
上海一郎合金材料有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

my country's self-developed CNP1000 million-kilowatt nuclear power plant, most of its nuclear power units require stainless steel materials, while conventional stainless steel has high non-metallic inclusions, A+B+C+D≤6.5; S and P are also high, S≤0.035 , P≤0.045; harmful elements are also high, Co, B, Pb, Sn, As, Sb, Bi are high, making it unusable for nuclear power

Method used

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  • Method for smelting ultra-pure austenite nuclear grade stainless steel
  • Method for smelting ultra-pure austenite nuclear grade stainless steel
  • Method for smelting ultra-pure austenite nuclear grade stainless steel

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Embodiment

[0022] Embodiment: the processing and production process of the present embodiment is as follows:

[0023] 1. Select high-quality raw materials, choose micro-carbon ferrochrome with carbon content ≤ 0.03; use 0# nickel plate, original eco-scrap high-quality top material for nickel plate, which has few impurities and low harmful elements, especially low Co and B content.

[0024] 2. Purification treatment of raw materials, charge and ferroalloy: Pickling high-quality alloy element materials, micro-carbon ferrochromium, VCr3, 0# nickel plate + 70% original ecological scrap steel, and then cleaning again with clean water (removing residual acid liquid), and drying Dry, reduce moisture to prevent gas formation. The purpose of this step is to be able to purify the molten steel at source.

[0025] 3. Purify the hearth and buns of the steel furnace, which is the step of washing the furnace, that is, before refining the steel grade of this embodiment, first refine the first furnace t...

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Abstract

The invention relates to the field of metal smelting, in particular to a method for smelting ultra-pure austenite nuclear grade stainless steel. The method is characterized by comprising the following steps: selecting high-quality raw materials, performing purification treatment, washing a furnace, and forging. The method has the advantages that the produced stainless steel meets the requirementsof RCC-M, 22Cn18-10 and AISI 304L, and also meets the requirement of OCT 04X18H10 standard and the requirement of GB / T1220-2007 00Cr19Ni10 standard, non-metallic inclusions are far lower than the standards of GB00Cr19Ni10, RCC-MZ2Cn18-10, AISI 304L, OCT 04X18H10, and the H and O gas content is low.

Description

technical field [0001] The invention relates to the field of metal smelting, in particular to a method for smelting ultra-pure austenitic nuclear-grade stainless steel. Background technique [0002] my country is now developing nuclear power, and has introduced French Framatome CPR100 and RCC-M technologies, as well as American AP1000 and AISI technologies. my country's self-developed CNP1000 million-kilowatt nuclear power plant, most of its nuclear power units require stainless steel materials, while conventional stainless steel has high non-metallic inclusions, A+B+C+D≤6.5; S and P are also high, S≤0.035 , P≤0.045; Harmful elements are also high, and Co, B, Pb, Sn, As, Sb, Bi are high, making it unusable for nuclear power. For example, in the nuclear island, the first circuit of the nuclear power plant contains radioactive elements and nuclear radiation. The rays may penetrate non-metallic inclusions in stainless steel and gas in steel. The I circuit of nuclear power plan...

Claims

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Application Information

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IPC IPC(8): C22C33/04C22C38/58
Inventor 陈菊生陈祖贲
Owner 上海一郎合金材料有限公司
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