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A kind of sintering flux for X80 pipeline steel submerged arc welding and preparation method thereof

A technology of sintering flux and submerged arc welding, which is applied in welding equipment, welding medium, manufacturing tools, etc., and can solve problems such as human health and environmental threats, incomplete combustion, etc.

Active Publication Date: 2017-04-12
郑州固力特新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The object of the present invention is to provide a flux for submerged arc welding of X80 pipeline steel and its preparation method, which solves the problem that the sintered flux containing halogen elements is prone to incomplete combustion during the welding process of X80 pipeline steel, and produces many toxic substances and acid or Corrosive gases, technical issues with potential threats to human health and the environment

Method used

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Embodiment Construction

[0035] A kind of sintered flux for submerged arc welding of X80 pipeline steel, the chemical composition of the flux includes: MgO45~50wt.%, Al 2 o 3 3~5wt.%, CaO3~4wt.%, SiO 2 5~8wt.%, MnO2~3wt.%, TiO 2 2~3wt.%, FeO3~5wt.%, ZrO 2 8~10wt.%, Na 2 O5~8wt.%, K 2 O5~8wt.%.

[0036] The sintered flux for submerged arc welding of X80 pipeline steel also includes: B 2 o 3 1wt.%.

[0037] The sintered flux for submerged arc welding of X80 pipeline steel also includes: a binder accounting for 5wt.% of the flux.

[0038] The sintered flux for submerged arc welding of X80 pipeline steel also includes: alloying agent: one or more of Si-Fe, Ti-Fe, Mn-Fe, adding Si-Fe alloying agent containing 60wt% silicon by weight 8 ~10wt.%, the weight of Ti-Fe alloy powder containing 45wt% titanium is 8~10wt.%, the weight of Mn-Fe containing 1wt% carbon and 60wt% manganese is 5~10wt.%.

[0039] The basicity B of the sintered flux for submerged arc welding of X80 pipeline steel Ⅱw 2.5-3.

[0...

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Abstract

The invention aims at providing a sintered flux for submerged-arc welding of X80 pipeline steel and a preparation method of the sintered flux, in order to solve the technical problems that in an X80 pipeline steel welding process, the possibility of incomplete combustion of a sintered flux containing halogen elements is high, resulting in that a large amount of toxic substances and acid or corrosive gas are produced and potentially threaten the human health and the environment. The sintered flux is characterized in that the sintered flux comprises the chemical components: 45-55wt.% of MgO, 3-5wt.% of Al2O3, 3-4wt.% of CaO, 5-8wt.% of SiO2, 2-3wt.% of MnO, 2-3wt.% of TiO2, 3-5wt.% of FeO, 8-10wt.% of ZrO2, 5-10wt.% of Na2O and 5-10wt.% of K2O. According to the sintered flux and the preparation method, the alkalinity and the low temperature impact toughness of weld metal are improved. In addition, the conductivity of the welding process and the electrochemical corrosion resistance of a welded joint are improved.

Description

technical field [0001] The invention belongs to the field of flux, and in particular relates to a sintered flux for submerged arc welding of X80 pipeline steel and a preparation method thereof. Background technique [0002] With the continuous construction and expansion of transportation pipelines such as oil and natural gas, especially in areas with harsh environments, the requirements for pipeline steel are more stringent. In order to meet the requirements of its harsh environment and reduce production costs, X80 pipeline steel is commonly used pipeline steel, but The matching sintering flux is relatively lagging behind. [0003] Submerged arc welding is a welding method with high efficiency and high degree of automation. my country has started to produce submerged arc welding flux since the 1950s. With the wide application of submerged arc welding and electroslag welding in production, the production of flux in my country has also become Has been developed by leaps and bo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K35/362B23K35/40
CPCB23K35/3602B23K35/362B23K35/40
Inventor 孙玉博
Owner 郑州固力特新材料有限公司