Welding rod for welding of martensite heat-resistant steel

A heat-resistant steel and martensite technology, which is applied in the field of welding electrodes for martensitic heat-resistant steel, can solve the problems of small arc blowing force, large welding spatter, and poor arc stability.

Active Publication Date: 2017-01-25
CENT IRON & STEEL RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] There is no heat-resistant steel supporting electrode for new martensitic heat-resistant steel G115 in the existing market. No matter whether P92 matching electrode or nickel-based alloy (such as 617 nickel-based alloy and 82 alloy) electrode is used, there are insurmountable problems
On the ...

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] The mass percent of the solder core composition of this embodiment is shown in the following table:

[0046] element C Si mn P S Cr W co Nb V Cu N B Fe wt.% 0.083 0.1 0.4 0.004 0.002 9.3 3.0 3.2 0.06 0.21 0.85 0.008 0.014 Remain

[0047] where B / N=1.75.

[0048] The percentage by weight of each component in the drug skin is shown in the following table:

[0049] Raw material name weight percentage Raw material name weight percentage marble 40 Electrolytic manganese 2 fluorite 22 iron powder 8 Golden fiber stone 8 soda ash 0.6 barium carbonate 12 carboxymethyl cellulose 0.6 ferro-titanium 6 Metal chrome powder 0.8

[0050] Among them, marble / fluorite=1.82;

[0051] The above-mentioned proportioning is mixed into the electrode sheath drug material, and the binder of adding 22% of the total weight of the powder raw material is potassium sodium water glass...

Embodiment 2

[0055] The mass percent of the solder core composition of this embodiment is shown in the following table:

[0056] element C Si mn P S Cr W co Nb V Cu N B Fe wt.% 0.07 0.1 0.4 0.004 0.002 8.6 2.9 3.1 0.05 0.23 0.80 0.009 0.015 Remain

[0057] where B / N=1.67.

[0058] The percentage by weight of each component in the drug skin is shown in the following table:

[0059] Raw material name weight percentage Raw material name weight percentage marble 35 Electrolytic manganese 2.5 fluorite 20 iron powder 10 Golden fiber stone 10 soda ash 0.8 barium carbonate 13 carboxymethyl cellulose 0.5 ferro-titanium 7 Metal chrome powder 1.2

[0060] Among them, marble / fluorite=1.75;

[0061] The above-mentioned proportioning is mixed into the electrode sheath drug material, and the binder of adding 25% of the total weight of the powder raw material is potassium sodium water gl...

Embodiment 3

[0065] The mass percent of the solder core composition of this embodiment is shown in the following table:

[0066] element C Si mn P S Cr W co Nb V Cu N B Fe wt.% 0.09 0.1 0.5 0.004 0.001 9.5 3.1 3.3 0.07 0.24 0.85 0.008 0.014 Remain

[0067] where B / N=1.75.

[0068] The percentage by weight of each component in the drug skin is shown in the following table:

[0069] Raw material name weight percentage Raw material name weight percentage marble 45 Electrolytic manganese 1 fluorite 21 iron powder 6 rutile 5 soda ash 0.8 barium carbonate 10 carboxymethyl cellulose 0.8 ferro-titanium 9 Metal chrome powder 1.4

[0070] Among them marble / fluorite=2.14;

[0071] The above-mentioned proportioning is mixed into the electrode sheath medicinal material, and the binder of adding powder raw material gross weight 16% is potassium sodium water glass (potassium sodium rati...

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Abstract

The invention discloses a welding rod for welding of martensite heat-resistant steel and belongs to the technical field of welding materials. The welding rod consists of a core wire and a coating, wherein the core wire is prepared from components in percentage by weight as follows: 0.07%-0.10% of C, less than or equal to 0.3% of Si, 0.3%-0.7% of Mn, less than or equal to 0.004% of P, less than or equal to 0.002% of S, 8.5%-9.5% of Cr, 2.8%-3.3% of W, 2.8%-3.5% of Co, 0.04%-0.08% of Nb, 0.15%-0.25% of V, 0.8%-1.0% of Cu, 0.007%-0.011% of N, 0.011%-0.020% of B and the balance of Fe; the coating is prepared from components as follows: 30%-45% of marble, 18%-25% of fluorite, 5%-10% of rutile, 10%-16% of barium carbonate, 5%-10% of ferrotitanium, 1.5%-3% of electrolytic manganese, 5%-10% of iron powder, 0.4%-0.8% of sodium carbonate, 0.4%-0.8% of carboxymethyl cellulose and 0.8%-3% of chromium metal powder. The welding rod has the advantages that the arc is stable during welding, few splashes are caused, the all-position operability is good, the slag detachability is good, formed welds are attractive in appearance, and deposited metal after welding has high strength and high toughness close to that of a parent metal, higher endurance strength and excellent crack sensitivity.

Description

technical field [0001] The invention belongs to the technical field of welding materials, in particular to a welding rod for martensitic heat-resistant steel welding. The welding rod is used for the welding of martensitic heat-resistant steel G115. During welding, the arc is stable, less spatter, good all-position operability, good slag removal, beautiful weld shape and high strength of deposited metal after welding. , High toughness, high durable strength, excellent resistance to crack sensitivity. Background technique [0002] Improving the steam temperature parameters of thermal power units is the most important measure to improve the thermal efficiency of the unit and realize coal saving and emission reduction. [0003] At present, several large electric power units in my country are actively preparing to build the world's first 630°C ultra-supercritical coal-fired demonstration power station; entrusted by the National Energy Administration, the General Electric Power P...

Claims

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Application Information

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IPC IPC(8): B23K35/30B23K35/36B23K35/40
CPCB23K35/3086B23K35/3602B23K35/406
Inventor 刘正东陈正宗马龙腾包汉生干勇杨钢
Owner CENT IRON & STEEL RES INST
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