Seawater corrosion resistance submerged arc welding wire rod, welding wire and application thereof

Abstract

The invention provides a seawater corrosion resistant submerged arc welding wire rod and a welding wire thereof. Both the wire rod and the welding wire comprises the following elements (according to the weight percent): C is equal to or less than 0.12, Si is equal to or less than 0.3, Mn is 1.0 to 1.8, S is equal to or less than 0.020, P is equal to or less than 0.020, Cr is 0.60 to 1.50, Ni is 0.15 to 0.50, Mo is 0.10 to 0.30, Cu is 0.05 to 0.30, Ti is 0.01 to 0.08, B is equal to or less than 0.005, Al is equal to or less than 0.030, and the rest is Fe and inevitable impurity elements. The invention also provides the application of the welding wire to the submerged arc welding wire matched with the seawater corrosion resistant steel Q345C-NHY3. The deposited metal of the welding wire provided by the invention has the advantages of excellent dynamic performance, welding performance and seawater corrosion resistant performance, which can be used for welding the seawater corrosion resistant steel. The welding wire rod and the welding wire of the invention are applicable to the structure with high corrosion resistance requirement in the immersion zone and the splash zone of the sea.

Description

technical field [0001] The invention belongs to the field of metal materials, in particular, the invention relates to a corrosion-resistant welding material, and more specifically, the invention relates to a seawater corrosion-resistant welding material. Background technique [0002] In the development and utilization of marine resources, steel plays an indispensable role, such as tidal current power generation, seawater power generation, seawater temperature difference power generation equipment and large-scale cross-sea bridges on the seashore, seabed containers related to ocean development, and equipment used for resource development. All kinds of large-scale marine construction and shipbuilding steel are inseparable from steel. Seawater corrosion-resistant steel is a type of low-alloy steel developed for the above environmental conditions. Q345C-NHY3 is one of them. It is a Cr-Cu-Mo low-carbon low-alloy seawater corrosion-resistant steel that can be The chemical composi...

AI Technical Summary

Problems solved by technology

[0005] Research on 1.440MPa seawater corrosion-resistant buried arc automatic welding wire (TGM welding wire), Tianjin Metallurgy, No. 1, 1991: The content of Ni element in the welding wire disclosed in this document is relatively high, reaching 1.00-1.50%, and the cost is relatively high

[0006] 2. Development of seawater corrosion-resistant submerged arc automatic welding materials for ships, material development and application, Vol.14, No.3, 1999: the content of Ni element in the welding wire disclosed in this document is relatively high, reaching 1.00-1.60%, and the cost is relatively low. high

[0007] 3. Marine high-toughness submerged arc welding wire, Journal of Welding, Vol. 26, No. 12, December 2005: The welding wire disclosed in this document contains a variety of alloy components, and the cost is relatively high

Both of them do not use Cr and Mo alloy elements in combination, and the content of Cr alone is low

[0015] Through the above preliminary search, it is found that there is currently no welding wire design scheme that can save costs and achieve good mechanical properties and seawater corrosion resistance.

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