Flux-cored welding wire for welding d406a steel and preparation method thereof

A technology of flux-cored welding wire and flux core, applied in welding equipment, welding medium, welding/cutting medium/material, etc., can solve protection and other problems, and achieve the effect of simple process, convenient operation and less welding smoke

Active Publication Date: 2017-01-25
邳州市城洁保洁有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of this invention is to provide a flux-cored welding wire for welding D406A steel, which solves the problem that the molten pool needs to be protected by gas when welding with H10 series welding wire

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0031] The preparation method of the above-mentioned flux-cored welding wire for welding D406A steel, the specific steps are as follows:

[0032] Step 1, weighing according to mass percentage: 2.5%-5% of ferrosilicon, 5%-7% of manganese powder, 0.8%-2% of chromium powder, 5%-15% of nickel powder, 0.5%-1.2% of molybdenum powder, Calcium fluoride 15%-17%, silicon dioxide 5%-7%, titanium dioxide 4%-6%, calcium carbonate 5%-10%, lithium carbonate 4%-7%, aluminum magnesium powder 7%-10%, The rest is iron, and the sum of the mass percentages of the above components is 100%;

[0033] Step 2: Stir the calcium fluoride, silicon dioxide, titanium dioxide, calcium carbonate, lithium carbonate, aluminum magnesium, and 30% of the total weight of the drug core powder in water weighed in step 1, mix them evenly, and place them in a heating furnace for sintering , the temperature is 500°C-650°C, the time is 2-2.5h, crushed into 80-100 mesh powder;

[0034] Step 3, mix the ferrosilicon, mang...

Embodiment 1

[0046] Step 1, weigh respectively: ferrosilicon 2.5g, manganese powder 6g, chromium powder 1.5g, nickel powder 10g, molybdenum powder 1g, calcium fluoride 15g, silicon dioxide 7g, titanium dioxide 5g, calcium carbonate 7g, lithium carbonate 5g, Aluminum magnesium powder 7g, iron 33g;

[0047] Step 2, add calcium fluoride, silicon dioxide, titanium dioxide, calcium carbonate, lithium carbonate, aluminum magnesium weighed in step 1, add 30g of water and stir, mix evenly and place in a heating furnace for sintering, the sintering temperature is 500°C, and sintering The time is 2.5h, crushed into 80-100 mesh powder;

[0048] Step 3, mix the ferrosilicon, manganese powder, chromium powder, nickel powder, molybdenum powder, and iron powder weighed in step 1 with the powder obtained in step 2, and then place them in a drying oven to dry, and the dried The temperature is 300°C, the time is 2.2h, and the drug core powder is obtained;

[0049] Step 4, place the H08A steel strip on the...

Embodiment 2

[0053] Step 1, Weigh respectively: ferrosilicon 5g, manganese powder 7g, chromium powder 2g, nickel powder 14g, molybdenum powder 1.2g, calcium fluoride 17g, silicon dioxide 7g, titanium dioxide 4g, calcium carbonate 6g, lithium carbonate 4g, aluminum Magnesium powder 8g, iron 24.8g;

[0054] Step 2, add calcium fluoride, silicon dioxide, titanium dioxide, calcium carbonate, lithium carbonate, aluminum magnesium weighed in step 1, add 30g of water and stir, mix evenly and place in a heating furnace for sintering, the sintering temperature is 550°C, sintering The time is 2.2h, crushed into 80-100 mesh powder;

[0055] Step 3, mix the ferrosilicon, manganese powder, chromium powder, nickel powder, molybdenum powder, and iron powder weighed in step 1 with the powder obtained in step 2, and then place them in a drying oven to dry, and the dried The temperature is 280°C, the time is 2h, and the drug core powder is obtained;

[0056] Step 4, place the H08A steel strip on the tape-...

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Abstract

The invention discloses a flux-cored wire for welding D406A steel and a manufacturing method thereof. The flux-cored wire is composed of outer skin and a power core, and the power core comprises, by mass, 2.5%-5% of silicon iron, 5%-7% of manganese powder, 0.8%-2% of chromium powder, 5%-15% of nickel powder, 0.5%-1.2% of molybdenum powder, 15%-17% of calcium fluoride, 5%-7% of silicon dioxide, 4%-6% of titanium dioxide, 5%-10% of calcium carbonate, 4%-7% of lithium carbonate, 7%-10% of aluminum-magnesium powder and the balanced iron. The flux-cored wire is used for welding the D406A steel, and a welding connector has the higher extension strength and the higher corrosion resistance; the flux-cored wire has the good welding manufacturability, welding spatters are fewer, welding smoke is less, and slag inclusion in the welding process is avoided; the flux-cored wire has the self-protecting effect, so that protective gas does not need to be additionally added during welding; the flux-cored wire is simple in manufacturing process, convenient to operate and suitable for mass production.

Description

technical field [0001] The invention belongs to the technical field of welding materials, and in particular relates to a flux-cored welding wire used for welding D406A steel, and also relates to a preparation method of the flux-cored welding wire. Background technique [0002] The content of alloying elements in D406A steel is less than 5%. The role of alloying elements in steel is mainly to ensure hardenability and improve the stability of tempered martensite. Strengthened by carbon elements, it has high tensile strength; and has excellent properties such as high toughness, high yield ratio (s / b), high specific strength (ratio of strength to density) and formability. Applications are growing in aerospace equipment, especially for solid rocket motor cases. [0003] There are two common welding methods for D406A, one is to use TIG to realize the connection of D406A materials without adding welding consumables. The strength of welded joints obtained by this method is often n...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K35/30B23K35/40
CPCB23K35/3053B23K35/406
Inventor 张敏褚巧玲张明李继红
Owner 邳州市城洁保洁有限公司
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