[1]张万鹏,等.CT70级低合金高强度油管用钢激光焊焊接接头性能研究[J].焊管,2020,43(8):1-6,12.[doi:10.19291/j.cnki.1001-3938.2020.08.001]
 ZHANG Wanpeng,ZHANG Ayu,et al.Properties of Laser Welded Joint of CT70 Low Alloy High Strength Tubing Steel[J].,2020,43(8):1-6,12.[doi:10.19291/j.cnki.1001-3938.2020.08.001]
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CT70级低合金高强度油管用钢
激光焊焊接接头性能研究
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《焊管》[ISSN:1001-3938/CN:61-1160/TE]

卷:
43
期数:
2020年第8期
页码:
1-6,12
栏目:
试验与研究
出版日期:
2020-08-28

文章信息/Info

Title:
Properties of Laser Welded Joint of CT70 Low Alloy High Strength Tubing Steel
文章编号:
10.19291/j.cnki.1001-3938.2020.08.001
作者:
张万鹏1 2张阿昱1 2宋红兵1 2宋海辉1 2符利兵1 2杨 奎3牛爱军1 2
1. 国家石油天然气管材工程技术研究中心,陕西 宝鸡 721008;
2. 宝鸡石油钢管有限责任公司钢管研究院,陕西 宝鸡 721008;
3. 北京隆盛泰科石油管科技有限公司,北京 100101
Author(s):
ZHANG Wanpeng1 2 ZHANG Ayu1 2 SONG Hongbing1 2  SONG Haihui1 2 FU Libing1 2 YANG Kui3 NIU Aijun1 2
1. Chinese National Engineering Research Center for Petroleum and Natural Gas Tubular Goods, Baoji 721008, Shaanxi, China;
2. Steel Pipe Research Institute, Baoji Petroleum Steel Pipe Co., Ltd., Baoji 721008, Shaanxi, China;
3. Beijing Longshine Oil Tubular Technology Co., Ltd., Beijing 100101, China
关键词:
焊接激光焊低合金高强度钢焊接接头组织性能
Keywords:
weldinglaser weldinglow alloy high strength steelwelded jointmicrostructure and properties
分类号:
TG407
DOI:
10.19291/j.cnki.1001-3938.2020.08.001
文献标志码:
A
摘要:
采用激光焊方法进行了CT70级油管用钢的焊接,并对焊接接头的外观、组织、硬度和力学等性能进行了检测。结果表明,激光焊焊接接头整体成形良好,无不良缺陷,焊接接头的强度、冲击韧性与母材相当,弯曲试验全部合格,焊缝及近缝区硬度明显上升。组织观察发现,冷速过快导致焊缝区铁素体变为粗大的块状,块状之间分布少量的小岛状组织,块状组织内部为大量分解不完全的富碳奥氏体。研究表明,激光焊接工艺可用于CT70级油管用钢的焊接与相关产品的制造。
Abstract:
CT70 grade tubing steel was welded by laser welding, and the appearance, microstructure, hardness and mechanical properties of the welded joint were tested. The results show that the laser welded joint is in good shape with no defects. The strength and impact toughness of the welded joint are equivalent to that of the base metal. The bending test is all qualified, and the hardness of the welded joint and the near weld area increases obviously. The microstructure observation shows that too fast cooling rate leads to the transformation of ferrite into coarse block, a small amount of small island structure is distributed between the blocks, and a large amount of carbon-rich austenite with incomplete decomposition is found in the massive structure. The results show that the laser welding process can be used for the welding of CT70 tubing steel and the manufacture of related products.

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备注/Memo

备注/Memo:

收稿日期:2020-04-27

基金项目: 国家重点研发计划项目“高应变海洋管线管研制”(项目编号2018YFC0310300)。
作者简介:张万鹏(1976—),男,硕士,高级工程师,主要从事油气管材焊接技术研究和新产品开发工作。

更新日期/Last Update: 2020-09-09