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Flux cored wire for impact-resistant nonstick steel overlaying

A tubular welding wire, impact-resistant technology, used in welding media, welding equipment, welding/cutting media/materials, etc., can solve problems such as poor welding performance, hot cracks and sticking to steel, and achieve low manufacturing costs and strong impact resistance. , the effect of reducing labor intensity

Active Publication Date: 2013-03-13
BAOSHAN IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although there is a certain amount of silicon and manganese in the deposited metal, its welding performance is poor, and it is prone to hot cracks and steel sticking.

Method used

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  • Flux cored wire for impact-resistant nonstick steel overlaying

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Embodiment Construction

[0032] The present invention will be further described below in conjunction with embodiments.

[0033] The components of the examples are shown in Table 1, which are prepared by conventional tubular welding wire manufacturing methods.

[0034] Overlay welding repair vertical roll stand roll:

[0035] 1) Preparation before welding

[0036] ①Inspect and machine the roller table to remove defects and fatigue layers:

[0037] ②The welding power source adopts MZ.1-1000 automatic submerged arc welding machine;

[0038] ③The welding wire in the welding materials should not have rust, oil and other debris. The flux must be baked at 200~300℃ for 5h before use to remove water;

[0039] ④ The rotating speed of the surfacing turntable is stable and should be able to ensure the uniformity of the surfacing weld.

[0040] 2) Preheat before welding

[0041] Because the carbon equivalent of the surfacing roller table material is Ceq=C+Mn, / 6+Si / 24+Cr / 5+Mo / 4=0.68 is relatively high, and the weldability is po...

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Abstract

The invention discloses a flux cored wire for impact-resistant nonstick steel overlaying. The flux cored wire comprises the following components in percentage by weight: 0.4-0.5 percent of carbon, 12.5-14.0 percent of chromium, 1.5-2.0 percent of manganese, 0.5-0.8 percent of silicon, 2.0-2.5 percent of nickel, 1.0-1.8 percent of molybdenum, 0.5-0.8 percent of vanadium, 0.2-0.5 percent of niobium, less than or equal to 0.010 percent of phosphorus, less than or equal to 0.010 percent of sulfur and the balance of Fe. The flux cored wire is used for surface overlaying strengthening of a wide and heavy plate frame roller; no welding defects such as bubbles, cracks and the like exist on the overlaid surface; and the flux cored wire has the mechanical performance such as high strength, impact toughness and the like, crucially has steel sticking resistance and meets the production requirements of a wide and heavy plate production line.

Description

Technical field [0001] The invention relates to welding materials, in particular to a tubular welding wire for surfacing welding of anti-impact non-stick steel. Background technique [0002] Tubular welding wire is a malleable metal strip. It is a tubular welding wire made of a special manufacturing process that encapsulates the filler in it. The outer stainless steel strip and the inner flux core alloy powder. [0003] Modern technology usually uses a wire forming machine to roll the plastic strip into a U-shape, and fill it with a uniform filler made of a variety of pre-set gold powders. After multi-roll continuous rolling (the number of rollers is the least) More than a dozen pairs, as many as 20 or 30 pairs), close the opening, and then roll into the required size of tube wire. [0004] Although the development of tubular welding wire began in the 1920s, it has been widely used in recent years. The main reason is that its manufacturing process and tube filler are immature and im...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K35/30
Inventor 丁海绍张建军顾振华
Owner BAOSHAN IRON & STEEL CO LTD
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