A kind of preparation method of surfacing welding rod

A technology for surfacing electrodes and electrode cores, applied in welding equipment, welding equipment, arc welding equipment, etc., can solve the problems of poor wear resistance, low welding seam strength, difficult to clean, etc., to improve the working environment and reduce welding fumes. , the effect of promoting melting

Active Publication Date: 2019-05-17
浙江申轮水泥机械制造有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem mainly solved by the present invention: for traditional surfacing welding electrodes, adding ore powder in the preparation process of the coating will produce a lot of welding slag during the welding process, which is difficult to clean, and the weld seam formed is low in strength, easy to crack, and wear-resistant The problem of poor performance provides a preparation method for surfacing welding electrodes

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0021] First, weigh 300g of diatomite, pour it into a ball mill, add zirconia ball milling beads according to the mass ratio of the ball to material at 8:1, pass through an 80-mesh sieve after ball milling for 2 hours, and then pour the diatomite sieved through the ball mill into a container In a fermenter of 2L biogas slurry, at a temperature of 35°C and a rotation speed of 200r / min, ferment for 5 days at a constant temperature, then filter to obtain a diatomite filter residue, and place the obtained diatomite filter residue in an oven. Dry to constant weight at 105°C to obtain dry filter residue, then add 0.6g of nano-iron powder and 200g of dry filter residue to the crucible, then transfer the crucible to a carbonization furnace, and feed argon into the furnace at a rate of 60mL / min Then, the temperature was programmed to rise to 700°C at a rate of 8°C / min, heat-preserved and carbonized for 45 minutes, the introduction of argon gas was stopped, and hydrogen gas was introduce...

example 2

[0024]First weigh 400g of diatomite, pour it into a ball mill, add zirconia ball milling beads according to the mass ratio of the ball to material at 9:1, pass through a 100-mesh sieve after ball milling for 3 hours, and then pour the diatomite sifted through the ball mill into a container In a fermenter of 3L biogas slurry, at a temperature of 36°C and a rotation speed of 250r / min, ferment in a constant temperature and airtight manner for 6 days, filter to obtain a diatomite filter residue, and place the obtained diatomite filter residue in an oven. Dry to constant weight at 108°C to obtain dry filter residue, then add 0.7g of nano-iron powder and 250g of dry filter residue to the crucible, then transfer the crucible to a carbonization furnace, and feed argon into the furnace at a rate of 70mL / min The temperature was programmed to rise to 750°C at a rate of 9°C / min, and the carbonization was carried out for 53 minutes. The argon was stopped, and carbon monoxide was introduced ...

example 3

[0027] First weigh 500g of diatomite, pour it into a ball mill, add zirconia ball milling beads according to the mass ratio of the ball to material at 10:1, pass through a 120-mesh sieve after ball milling for 4 hours, and then pour the diatomite sifted through the ball mill into a container In a 4L biogas slurry fermenter, at a temperature of 37°C and a rotational speed of 300r / min, ferment for 7 days at a constant temperature, then filter to obtain a diatomite filter residue, and place the obtained diatomite filter residue in an oven. Dry to constant weight at 110°C to obtain dry filter residue, then add 0.8g of nano-iron powder and 300g of dry filter residue to the crucible, then transfer the crucible to a carbonization furnace, and feed argon into the furnace at a rate of 80mL / min The temperature was programmed to rise to 800°C at a rate of 10°C / min, and kept for carbonization for 60 minutes. The argon was stopped, and methane was introduced into the furnace at a rate of 40...

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Abstract

The invention belongs to the technical field of preparation of welding materials, particularly relates to a preparation method of surfacing electrodes. The preparation method comprises the following steps of firstly, smashing diatomite, mixing the smashed diatomite with methane fluid to obtain a mixture A, fermenting the mixture A, and drying the fermented mixture A; using nanometer iron powder as a catalyst, enabling silicon dioxide in the diatomite and charred organic matter to react at high temperatures to obtain silicon carbide whiskers, and enabling the obtained silicon carbide whiskers and the redundant charred organic matter to jointly form a sintering feed; then enabling ortho-silicic acid generated by the hydrolyzing of tetraethoxysilane and potassium hydroxide to react so as to obtain bonding liquid; and finally, uniformly mixing the bonding liquid with activated carbon and metal powder to obtain a mixture B, and pressing the obtained mixture B and a welding core, and performing drying so as to obtain the surfacing electrode. According to the preparation method disclosed by the invention, the compositions of electrode covering flux do not have mineral powder, and no slag is generated in each welding seam basically; in the welding process, the silicon carbide whiskers and the charred organic matter react with oxygen in the air to realize heat emission, and the self-made bonding liquid is matched for use, so that the arc stability of the surfacing electrode and the strength of the welding seam are improved.

Description

technical field [0001] The invention belongs to the technical field of welding material preparation, and in particular relates to a preparation method of surfacing welding electrodes. Background technique [0002] With the rapid development of modern industry and technology, mechanical parts often work under extremely complex and harsh conditions, and a large number of mechanical equipment are often scrapped due to wear, corrosion, and abrasion. Especially for workpieces that have been exposed to high temperature for a long time, problems such as softening due to oxidation, tempering or phase transformation of the structure, creep damage, and thermal fatigue cracks caused by repeated heating and cooling are likely to occur, so the wear is more prominent . Wear and tear not only consumes energy and materials, but also consumes manpower and material resources due to wear and tear when replacing parts, such as repairs, shutdowns, etc., and reduces labor productivity, etc., and...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K35/40B23K35/365B23K9/04
CPCB23K9/04B23K35/365B23K35/40
Inventor 郭剑许丽君孙冬
Owner 浙江申轮水泥机械制造有限公司
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