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Carbon steel covered electrode for nuclear power carbon steel welding and preparation method

A carbon steel and electrode technology, applied in welding equipment, welding medium, welding/cutting medium/material, etc., can solve the problem of inability to guarantee deposited metal, and achieve the effect of good welding process performance, small spatter and convenient operation

Active Publication Date: 2014-02-05
ATLANTIC CHINA WELDING CONSUMABLES +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the carbon steel electrodes produced in China cannot guarantee that the deposited metal will obtain good performance after heat treatment at 595-625°C for 1h, 16h, and 40h. The mechanical properties of the three heat-treated states meet the same technical index and have strong stability. sex

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] A carbon steel welding rod for nuclear power carbon steel structure welding of the present invention, because it is used for the welding of the main equipment of the nuclear island, the content of impurity elements in the deposited metal needs to be strictly controlled, and the rod wire meeting the following composition requirements is used to produce the welding rod, The basic slag system is used to ensure good mechanical properties of the deposited metal.

[0039] Take the coating, and the components and parts by mass of the coating are as follows:

[0040] 11% marble, 4% fluorite, 1.5% rutile, 2.0% silicon powder, 1.3% manganese metal, 2.1% ferrosilicon, 0.3% ferromolybdenum, 0.1% graphite, 2.5% iron powder, 0.3% soda ash, 0.2 sodium alginate %.

[0041] The mass of the welding core is 69.64%, and the composition meets the following requirements (wt%): C: 0.04-0.08, Mn: 0.30-0.60, Si: 0.01-0.04, S: ≤ 0.005, P ≤ 0.010, and the balance is iron and trace impurities....

Embodiment 2

[0043] Take the coating, and the components and parts by mass of the coating are as follows:

[0044] 11.5% marble, 4.5% fluorite, 1.8% rutile, 1.8% silica powder, 1.5% manganese metal, 2.2% ferrosilicon, 0.4% ferromolybdenum, 0.2% graphite, 2.6% iron powder, 0.2% soda ash, 0.3 sodium alginate %.

[0045] The binder accounts for 16% of the total mass content of the powder.

[0046] Welding core accounts for 68.68% of the total electrodes.

[0047] Then bake at a low temperature of 90°C for 1.5 hours and at a high temperature of 420°C for 1 hour, and it is ready.

[0048] Other content is as embodiment 1.

Embodiment 3

[0050] Take the coating, and the components and parts by mass of the coating are as follows:

[0051] 12% marble, 4% fluorite, 2.0% rutile, 1.8% silicon micropowder, 1.6% manganese metal, 2.1% ferrosilicon, 0.5% ferromolybdenum, 0.1% graphite, 2.5% iron powder, 0.2% soda ash, 0.2 sodium alginate %.

[0052] The binder accounts for 17% of the total mass content of the powder.

[0053] The welding core accounts for 68.41% of the total electrodes.

[0054] Then bake at a low temperature of 88°C for 2 hours and at a high temperature of 400°C for 1.5 hours, and it is ready.

[0055] Other content is as embodiment 1.

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Abstract

The invention belongs to the technical field of a welding material and particularly relates to a carbon steel covered electrode for the third-generation nuclear power technical welding and a preparation method. The carbon steel covered electrode is characterized by comprising a core wire, a cover and an adhesive, wherein the mass ratio of powder to the covered electrode is (25 to 27):100 and the mass ratio of the powder to the adhesive is 100:(15 to 20). In the welding process of the covered electrode in the invention, electric arcs are stable and splashing is little; slag detachability is good; a postwelding slag crust in the flat welding process can be automatically upwarped; the covered electrode is well formed and has good whole-position operability; after welded deposited metal is subjected to heat preservation for 1h, 16h and 40h at a temperature of 595 to 625 DEG C, mechanical property in the three thermal treatment states meets the technical indexes and has high stability.

Description

technical field [0001] The invention relates to the technical field of welding materials, in particular to a carbon steel electrode for nuclear power carbon steel welding and a preparation method. [0002] Background technique [0003] The safety and economy of the third-generation nuclear power plants will be significantly better than the second-generation nuclear power plants. Since safety is the prerequisite for the development of nuclear power, in addition to extending the life of the second-generation units in operation and supplementary construction of some second-generation units in the world, the focus of the next batch of nuclear power construction is to adopt safer and more economical ones. Advanced third-generation nuclear power units. The National Energy "Twelfth Five-Year Plan" clearly stated that new nuclear power units must meet the safety standards of the third generation. With the continuous start of construction of the third-generation nuclear power unit...

Claims

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Application Information

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IPC IPC(8): B23K35/30B23K35/365B23K35/40
CPCB23K35/3073B23K35/3602B23K35/3605B23K35/368B23K35/404
Inventor 任军陈维富蒋勇赵建仓杨春乐王淦刚邱振生邓小云朱平匡艳军霍玲玲黄腾飞
Owner ATLANTIC CHINA WELDING CONSUMABLES
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