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Refractory steel alkaline flux-cored wire with excellent removability of slag

A technology of flux-cored welding wire and heat-resistant steel, which is applied in the welding field of low-alloy heat-resistant steel flux-cored welding wire and low-alloy heat-resistant steel, and achieves the effects of moderate thickness, excellent welding performance and improved coverage.

Inactive Publication Date: 2007-09-26
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The development of low-alloy heat-resistant steel basic flux-cored welding wire with excellent slag detachability has not yet been reported on patents at home and abroad.

Method used

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  • Refractory steel alkaline flux-cored wire with excellent removability of slag

Examples

Experimental program
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Embodiment Construction

[0028] All the welding wires of the examples are produced by the "FCWM50 flux core wire drawing machine" manufactured by Kunming Heavy Machinery Factory: carbon steel strips with a width of 8-12mm and a thickness of 0.25-0.5mm are selected. First roll it into a U shape, and then add mixed medicinal powder with a particle size of 80 mesh sieves into the U-shaped groove. The filling rate of the medicinal powder (the percentage of the weight of the medicinal powder in the total weight of the welding wire) is 17-22%. Close the U-shaped groove so that the powder is wrapped in it.

[0029] The specific implementation plan is as follows:

[0030] 1. Select 8×0.25 (width 8mm, thickness 0.25mm) H08A carbon steel strip. Roll it into a U shape first. Fe molybdenum powder 12%, metal chromium powder 13%, titanium iron powder 3.5%, Fe powder 10%, silicon iron powder 10%, aluminum magnesium alloy powder 3%, manganese powder 5%, zirconia powder 2%, fluorite 20%, barium fluoride powder 11%,...

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Abstract

The invention relates to a basic flux-cored wire of heat-resistant steel with good slag detachability, belonging to the welding field of material processing technology. The invention solves the problem that the prior basic flux-cored wire of heat-resistant steel sticks slag seriously. The invention is characterized in that components of added flux-core are 25-37% of barium fluoride, 12-14% of metal chromium, 5-20% of Fe powder, 5-10% of silicon iron, 2-6% of Al-Mg alloy powder, 5-8% of marble, 2-4% of zirconium oxide, 7-12% of Ti, 10-11% of ferromolybdenum, 1-4% of Na2CO3 and 3-4% of manganese. The invention is provided with easy slag detachability, stable electrical arc, very small and thin splashing particle, beautiful welding line formation and good welding process performance.

Description

technical field [0001] The invention belongs to the field of welding in material processing engineering. The welding wire is a low-alloy heat-resistant steel flux-cored welding wire made of carbon steel strips wrapped with various alloy powders and mineral powders, and the deposited metal is 2.25Cr1Mo type. It is mainly used in the welding of low-alloy heat-resistant steels in high-speed development and cutting-edge industries such as electric power, chemical industry, petroleum, atomic energy, and aviation. Background technique [0002] The deposited metal of basic welding wire has excellent mechanical properties, so basic welding wire must be used for welding important structures. With the rapid development of industrial technology, the application of heat-resistant steel is becoming more and more extensive, and the long-term service of heat-resistant steel components in high-temperature and high-pressure environments requires increasing requirements for the comprehensive ...

Claims

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Application Information

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IPC IPC(8): B23K35/36B23K35/40B23K9/095
Inventor 栗卓新张莉李国栋魏琪
Owner BEIJING UNIV OF TECH
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