A matching welding rod for low temperature steel containing ni

Abstract

The invention provides a welding rod containing low temperature steel containing Ni. A coating of the welding rod at least comprises, by mass, 40-50% of marble, 18-25% of fluorite, 2-5% of barium carbonate, 2-5% of silica powder, 0.5-1.0% of lithium carbonate, 0.5-1.0% of rare earth fluoride, 0.5-1.0% of borax, 2-5% of manganese metal, 2-5% of atomized silicon iron, 2-4% of rare earth silicon iron, 3-6% of ferrotitanium, 0.5-1.0% of aluminum magnesium alloy, 9-11% of nickel powder and 0.4-1.0% of sodium alga acid. Sodium potassium silicate is added into the coating of the welding rod formed by mixing the components according to the ratio, an H04E welding core is coated with the coating through a welding rod coating machine, an electric welding rod is dried by a drier and set, the deposited metal diffusible hydrogen content of the electric welding rod is effectively controlled, the deposited metal diffusible hydrogen content is 3.5ml / 100g, and the standard requirement for an ultralow hydrogen welding rod is met.

Description

technical field

[0001] The invention relates to a welding rod matched with Ni-containing low-temperature steel, which belongs to the field of welding materials. Background technique

[0002] The 3.5Ni low-temperature pressure vessel steel (ASME grade SA203E) used at -100°C is a commonly used steel in foreign countries. The United States, Japan and Germany have already used it for -80°C and -101°C vessels. China used to rely entirely on imports of this steel . Only in 1978, combined with the ethylene project with an annual output of 115,000 tons, a semi-industrial test of 3.5Ni steel was carried out by Taiyuan Iron and Steel Company. In 1984, in the "coal gasification project" project of the national major technical equipment scientific and technological breakthrough, the low-temperature 3.5Ni steel application project was determined. In 1986, the localization of 3.5Ni steel was included in the "Seventh Five-Year Plan" research project of the Ministry of Metallurgy. The 3.5...

Examples

Embodiment 1

[0026] Embodiment 1: the percentage by weight of each component in the drug skin is shown in the following table:

[0027] Raw material name

weight percentage

Raw material name

weight percentage

marble

40

manganese metal

4.5

Fluorite

25

Atomized ferrosilicon

5

barium carbonate

5

Rare earth ferrosilicon

2

Silica powder

2

ferro-titanium

4

lithium carbonate

0.5

Aluminum-magnesium alloy

0.5

Rare earth fluoride

1

nickel powder

9

Borax

0.5

sodium alginate

1

[0028] The deposited metal composition of the electrode prepared according to the above ratio is shown in the following table:

[0029]

[0030] The mechanical properties of the deposited metal of the electrode prepared according to the above ratio are shown in the following table:

[0031]

[0032] The hydrogen content of the deposited metal in the electrode pre...

Embodiment 2

[0034] Embodiment 2: the percentage by weight of each component in the drug skin is shown in the following table:

[0035] Raw material name

[0036] The deposited metal composition of the electrode prepared according to the above ratio is shown in the following table:

[0037]

[0038]The mechanical properties of the deposited metal of the electrode prepared according to the above ratio are shown in the following table:

[0039]

[0040] The hydrogen content of the deposited metal of the electrode prepared according to the above ratio (mercury method ml / 100g) is shown in the following table:

[0041] sample

[0042] content

Embodiment 3

[0043] Embodiment 3: the percentage by weight of each component in the drug skin is shown in the following table:

[0044] Raw material name

weight percentage

Raw material name

weight percentage

marble

44

manganese metal

2

Fluorite

21

Atomized ferrosilicon

3.6

barium carbonate

3.5

Rare earth ferrosilicon

3

Silica powder

3.5

ferro-titanium

4.5

lithium carbonate

0.7

Aluminum-magnesium alloy

0.7

Rare earth fluoride

1

nickel powder

11

Borax

0.8

sodium alginate

0.7

[0045] The deposited metal composition of the electrode prepared according to the above ratio is shown in the following table:

[0046]

[0047] The mechanical properties of the deposited metal of the electrode prepared according to the above ratio are shown in the following table:

[0048]

[0049] The hydrogen content of the deposited metal of the elec...

technical field

[0001] The invention relates to a welding rod matched with Ni-containing low-temperature steel, which belongs to the field of welding materials. Background technique

[0002] The 3.5Ni low-temperature pressure vessel steel (ASME grade SA203E) used at -100°C is a commonly used steel in foreign countries. The United States, Japan and Germany have already used it for -80°C and -101°C vessels. China used to rely entirely on imports of this steel . Only in 1978, combined with the ethylene project with an annual output of 115,000 tons, a semi-industrial test of 3.5Ni steel was carried out by Taiyuan Iron and Steel Company. In 1984, in the "coal gasification project" project of the national major technical equipment scientific and technological breakthrough, the low-temperature 3.5Ni steel application project was determined. In 1986, the localization of 3.5Ni steel was included in the "Seventh Five-Year Plan" research project of the Ministry of Metallurgy. The 3.5...

Examples

Embodiment 1

[0026] Embodiment 1: the percentage by weight of each component in the drug skin is shown in the following table:

[0027] Raw material name

weight percentage

Raw material name

weight percentage

marble

40

manganese metal

4.5

Fluorite

25

Atomized ferrosilicon

5

barium carbonate

5

Rare earth ferrosilicon

2

Silica powder

2

ferro-titanium

4

lithium carbonate

0.5

Aluminum-magnesium alloy

0.5

Rare earth fluoride

1

nickel powder

9

Borax

0.5

sodium alginate

1

[0028] The deposited metal composition of the electrode prepared according to the above ratio is shown in the following table:

[0029]

[0030] The mechanical properties of the deposited metal of the electrode prepared according to the above ratio are shown in the following table:

[0031]

[0032] The hydrogen content of the deposited metal in the electrode pre...

Embodiment 2

[0034] Embodiment 2: the percentage by weight of each component in the drug skin is shown in the following table:

[0035] Raw material name

[0036] The deposited metal composition of the electrode prepared according to the above ratio is shown in the following table:

[0037]

[0038]The mechanical properties of the deposited metal of the electrode prepared according to the above ratio are shown in the following table:

[0039]

[0040] The hydrogen content of the deposited metal of the electrode prepared according to the above ratio (mercury method ml / 100g) is shown in the following table:

[0041] sample

[0042] content

Embodiment 3

[0043] Embodiment 3: the percentage by weight of each component in the drug skin is shown in the following table:

[0044] Raw material name

weight percentage

Raw material name

weight percentage

marble

44

manganese metal

2

Fluorite

21

Atomized ferrosilicon

3.6

barium carbonate

3.5

Rare earth ferrosilicon

3

Silica powder

3.5

ferro-titanium

4.5

lithium carbonate

0.7

Aluminum-magnesium alloy

0.7

Rare earth fluoride

1

nickel powder

11

Borax

0.8

sodium alginate

0.7

[0045] The deposited metal composition of the electrode prepared according to the above ratio is shown in the following table:

[0046]

[0047] The mechanical properties of the deposited metal of the electrode prepared according to the above ratio are shown in the following table:

[0048]

[0049] The hydrogen content of the deposited metal of the elec...

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