[1]李毅.SA335P91马氏体耐热钢主蒸汽管道的焊接[J].焊管,2012,35(12):50-53.[doi:1001-3938(2012)12-0050-04]
 LI Yi.Main Steam Pipe of P91 Martensitic Heat-Resisting Alloy Steel Be Welded[J].,2012,35(12):50-53.[doi:1001-3938(2012)12-0050-04]
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SA335P91马氏体耐热钢主蒸汽管道的焊接
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《焊管》[ISSN:1001-3938/CN:61-1160/TE]

卷:
35
期数:
2012年第12期
页码:
50-53
栏目:
经验交流
出版日期:
2012-12-28

文章信息/Info

Title:
Main Steam Pipe of P91 Martensitic Heat-Resisting Alloy Steel Be Welded
文章编号:
1001-3938(2012)12-0050-04
作者:
李毅
(陕西电力建设总公司,西安710032)
Author(s):
LI Yi
(Shaanxi Power Construction Corporation,Xi’an 710032, China)
关键词:
SA335P91马氏体耐热钢焊接工艺工艺评定硬度金相组织质量控制
Keywords:
SA335P91 martensitic heat-resisting steel welding process procedure qualification hardness metallographic structure quality control
分类号:
TM611.1
DOI:
1001-3938(2012)12-0050-04
文献标志码:
B
摘要:
印度西孟加拉邦加尔各答Sagardighi电站建设工程2×300 MW机组,主蒸汽管道采用SA335P91钢,规格?准 455 mm×50 mm,由于SA335P91钢中Cr和Mo含量较高,具有较高的淬硬倾向和冷裂倾向,导致其可焊性差,在不预热的条件下焊接时极易产生冷裂纹。根据主蒸汽管道SA335P91钢焊接工艺的特点及现场施焊中焊接质量存在的问题,制定了合理的焊接工艺,强调了主蒸汽管道SA335P91钢焊接质量控制、焊缝硬度值和焊缝金相组织检验。
Abstract:
The  455 mm×50 mm SA335P91 steel was used in 2×300 MW unit of Sagardighi Thermal Power Plants, Kolkata, India. SA335P91 steel is with high quench hardening and cold crack tendency due to high content of Cr and Mo, which cause bad weldability for SA335P91 steel, cold cracks generate easily when SA335P91 steel is welded without preheating. According to welding process characteristics of the main stream pipeline SA335P91 steel and some problems existed in site welding, it set up the reasonable welding process , emphasized welding quality control , hardness value of weld, and metallographic structure test.

参考文献/References:

[1] DL/T 869—2004,火力发电厂焊接技术规程[S].
[2] DL/T 868—2004,焊接工艺评定规程[S].
[3] ASME Boiler and Pressure Vessel Code Ⅱ/Ⅴ/Ⅸ(2010)[S].
[4] Indian Boiler Regulations(2011)[S].
[5] DCPL-K3A14—2004,“CONTRACT” VOLUMEⅡ[S].
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备注/Memo

备注/Memo:
作者简介: 李 毅(1968—),男,陕西咸阳人,工程师,陕西电力建设总公司印度RKM项目总工程师,主要从事火电项目施工工作。
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