High-strength, high-toughness and seawater corrosion-resistant welding rod for ocean engineering

A marine engineering, high-strength technology, used in welding media, manufacturing tools, welding equipment, etc., can solve the problems of unresearched corrosion resistance, low temperature toughness application, unapplied, unanalyzed, etc., to achieve excellent seawater corrosion resistance, Good resistance to moisture absorption and low cold crack sensitivity

CN105328363AInactive Publication Date: 2016-02-17SICHUAN XIYE NEW MATERIAL
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
Publication Date
2016-02-17
Estimated Expiration
Not applicable · inactive patent
Patent Text Reader

Abstract

The invention discloses a high-strength, high-toughness and seawater corrosion-resistant welding rod for ocean engineering. The deposited metal of the welding rod comprises the following ingredients in percentage by mass: not greater than 0.05 parts of C, not greater than 0.60 parts of Si, 1.30-1.80 parts of Mn, 0.25-0.40 parts of Cr, 2.20-2.80 parts of Ni, 0.35-0.55 parts of Mo, 0.15-0.40 parts of Cu, not greater than 0.006 parts of S, not greater than 0.010 parts of P, and not greater than 0.005 parts of Re. A preheating temperature can be lowered to 50 DEG C when 800MPa-grade high-strength steel for ocean engineering is welded by adopting the technology of the invention; the coating of the welding rod is high in moisture absorption, the welding toe is smooth, and all-position welding can be carried out; and the welding rod has a high welding joint metal strength (Rm of not less than 780MPa), a low diffusible hydrogen content, a low cold crack sensitivity, a high low-temperature impact strength Kv2 of more than 70J at minus 60 DEG C, extremely low S and P impurity contents, and excellent seawater corrosion resistance.
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Description

technical field

[0001] The invention relates to welding engineering, in particular to the application of a lifting system, a cantilever, a rack plate to a rack plate, and a semicircular plate to a semicircular plate in the leg of a semi-submersible offshore oil platform and a self-elevating drilling platform. It can also be used in the manufacturing fields of high-strength seawater corrosion-resistant equipment such as marine engineering ships, marine oil pipelines, and nuclear power plants of the same level of strength, and specifically relates to a high-strength, high-toughness seawater corrosion-resistant welding rod for marine engineering. Background technique

[0002] Domestic iron and steel enterprises have made great breakthroughs in the research of large-thickness (100mm) TMCP high-performance steel such as petrochemical and marine engineering equipment. Welding consumables manufacturers have not yet broken through key technologies in the control of impurity elements ...

Examples

Embodiment Construction

[0016] All features disclosed in this specification, or steps in all methods or processes disclosed, may be combined in any manner, except for mutually exclusive features and / or steps.

[0017] Any feature disclosed in this specification (including any appended claims, abstract), unless otherwise stated, may be replaced by alternative features which are equivalent or serve a similar purpose. That is, unless expressly stated otherwise, each feature is one example only of a series of equivalent or similar features.

[0018] The specific implementation of the present invention will be described in detail below in conjunction with the examples.

[0019] According to an embodiment of the present invention, this embodiment is a high-strength marine engineering welding rod XY-J80HG with high toughness and seawater corrosion resistance, which is used for welding 50-130mm marine engineering 800MPa grade high-strength steel at a preheating temperature of 50°C. The electrode of this exa...