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Low hydrogen type super-critical ferrite heat resistant steel electrode

A supercritical, ferritic technology, used in welding media, welding equipment, welding/cutting media/materials, etc., can solve the problems of unsatisfactory performance and mechanical properties, unsatisfactory impact toughness, poor crack resistance, etc., to achieve excellent Good mechanical properties, good impact toughness and excellent crack resistance

Active Publication Date: 2014-10-29
WUHAN TEMO WELDING CONSUMABLES CO LTD
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  • Abstract
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  • Application Information

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Problems solved by technology

[0004] In view of the above problems, the object of the present invention is to provide a low-hydrogen type supercritical ferritic heat-resistant steel electrode, which aims to solve the problem of unsatisfactory process performance and mechanical properties of the existing electrode for welding T / P91 steel, high diffusible hydrogen, and high resistance to welding. The technical problems of poor cracking and unsatisfactory impact toughness

Method used

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  • Low hydrogen type super-critical ferrite heat resistant steel electrode
  • Low hydrogen type super-critical ferrite heat resistant steel electrode
  • Low hydrogen type super-critical ferrite heat resistant steel electrode

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Embodiment 1

[0035] The composition and mass ratio of electrode coating and welding core are as follows:

[0036] Skin composition and ratio: 20% marble; 40% fluorite; 5% 98° rutile; 5% silicon powder; 10% 45# atomized ferrosilicon; 1% seaweed; 0.5%; the balance is iron powder.

[0037] Weld core composition and ratio: C0.05%; Si0.2%; Mn0.7%; Cr12%; Ni0.05%; Mo1.4%; V0.4%; Nb0.04%; N0.07%; Cu0.05%; Al0.02%; the balance is iron.

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Abstract

The invention belongs to the technical field of welding materials, and provides a low hydrogen type super-critical ferrite heat resistant steel electrode. A coating comprises, by weight, 15-20% of marble, 30-50% part of fluorite, 3-5% of rutile with purity being 98 percent, 3-5% of silica powder, 7-10% of 45# pulverization silicon iron, 0.5-1% of seaweed, 5-10% of electrolytic manganese, 0.2-0.4% of graphite, 0.3-1% of rare earth oxide, and the balance iron powder. According to the low hydrogen type super-critical ferrite heat resistant steel electrode, the ratio of the marble and the fluorite in the steel electrode coating is about 1: 2, the diffusible hydrogen content of a weld joint is reduced, the technical performance of the steel electrode is improved, the core wire component is microalloyed, the core wire tradition alloy component is adopted, the good mechanical performance is obtained, and the experience shows that the steel electrode is good in electric arc stability, impact toughness and crack resistance, good in welding technology and suitable for full-position welding of T / P91 steel, and the diffusible hydrogen reaches the ultralow hydrogen level.

Description

technical field [0001] The invention belongs to the technical field of welding materials, in particular to a low-hydrogen type supercritical ferrite heat-resistant steel welding rod. Background technique [0002] T / P91 steel is a new type of steel obtained by adding a small amount of niobium, vanadium and nitrogen microalloying on the basis of traditional 9Cr1Mo steel. Such compositions provide excellent long term high temperature creep strength. T / P91 steel is widely used in the construction of main structures such as boiler drums, steam pipes and steam turbine casings of coal-fired and power plants, and can also be used in smelting equipment in the petrochemical industry and coal liquefaction and gasification equipment. [0003] However, in the field of heat-resistant steel, the supporting T / P91 steel electrode has unsatisfactory technological and mechanical properties, high diffusible hydrogen, poor crack resistance, and unsatisfactory impact toughness. Contents of the...

Claims

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Application Information

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IPC IPC(8): B23K35/365B23K35/368B23K35/30
CPCB23K35/0266B23K35/3086B23K35/3605B23K35/365
Inventor 田海成刘玉双韩海峰李磊张亚平
Owner WUHAN TEMO WELDING CONSUMABLES CO LTD
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