Process Practice of Improving Cleanliness of Steel 508 Ⅲ for Nuclear Power Welding

张欣杰; 赵雷; 陈保梁; 董方; 闫瑞军

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Process Practice of Improving Cleanliness of Steel 508 Ⅲ for Nuclear Power Welding

更新时间：2026-01-21

- Process Practice of Improving Cleanliness of Steel 508 Ⅲ for Nuclear Power Welding
- Special Steel Vol. 39, Issue 1, Pages: 37-40(2018)
- 作者机构：
  
  1. 中航上大髙温合金材料有限公司,邢台,054000
  2. 内蒙古科技大学材料与冶金学院,包头,014010
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Received：07 August 2017，
  
  Online First：30 June 2022，
  
  Published：30 June 2018
- 稿件说明：
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张欣杰, 赵雷, 陈保梁, et al. Process Practice of Improving Cleanliness of Steel 508 Ⅲ for Nuclear Power Welding[J]. Special Steel, 2018, 39(1): 37-40.
DOI：

张欣杰, 赵雷, 陈保梁, et al. Process Practice of Improving Cleanliness of Steel 508 Ⅲ for Nuclear Power Welding[J]. Special Steel, 2018, 39(1): 37-40. DOI：

摘要

核电焊材用钢508 Ⅲ（/%:0.09~0.12C

0.30~0.40Si

1.45~1.65Mn

≤0.008P

≤0.008S

0.45~0.60Mo

0.60~0.75Ni）的生产工艺流程为20t EAF-LF-VD-4t铸锭-锻造150 mm×150 mm坯-轧制Φ5.5mm盘条。采用精选炉料

以及高碱度渣、高FeO含量

钢水温度1550~1570℃等措施控制

电弧炉终点[P

]

≤0.002%

并选用低磷合金

使钢中磷含量≤0.006%;LF采用硅钙合金沉淀脱氧

SiC粉扩散脱氧、CaO-Al

-SiO

渣系

碱度5.0~5.5

VD真空度≤67Pa

Ar流量30~50 L/min

保护浇铸等措施后

3炉钢的分析结果表明

钢中气体含量为1.3×10

-6

~1.5×10

-6

]

10×10

-6

~14×10

-6

]

和44×10

-6

~58×10

-6

]

满足核电焊材用钢508Ⅲ洁净度的要求。

Abstract

The production process flowsheet of steel 508III for nuclear power welding (/% ：0.09~0.12C

0.30~0.40Si

1.45〜1.65Mn

≤0.008P

≤0.008S. 0.45~0.60Mo

0.60~0.75Ni) is 20t EAF-LF-VD-4t ingot-forged to 150 mm x 150 mm billet-rolled to Φ5.5 mm coil. With process measures including using quality charge

high basicity slag and high FeO content

and controlling liquid temperature 1550 ~ 1570 °C

the EAF end [P

]

is ≤0.002%

and using low phosphorus alloys

the phosphorus content in steel is ≤0.006% ； in LF refining process using silicon-calcium alloy for killing and SiC powder for diffusion deoxidation

and using CaO-Al

-SiO

slag series wi

th basicity 5.0~5.5

in VD process vacuum ≤67 Pa and Ar flow rate 30~50 L/min

and shielding casting etc measures the analysis results of 3 heats steel show that the gas content in steel is 1.3 x 10

-6

~1.5 x 10

-6

]

10 x10

-6

~14 x 10

-6

[ 0

]

and 44 x 10

-6

~58 x 10

-6

]

to meet the cleanliness requirement of steel 508Ⅲ for nuclear power wielding.

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