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Stainless steel welding electrode special for end socket and preparation method of stainless steel welding electrode

A stainless steel and welding rod technology, applied in welding equipment, welding media, manufacturing tools, etc., can solve the problems of poor welding process of alkaline stainless steel welding rods, troublesome cleaning of welding workers, hidden safety hazards in the head, etc., and achieve moderate arc blowing force , Stable arc and uniform slag coverage

Inactive Publication Date: 2018-04-13
TIANJIN BRIDGE WELDING MATERIALS GROUP +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The steel plate welded by the acidic stainless steel electrode is very easy to tear during the suspension process, and needs to be repaired repeatedly, so that there is a safety hazard in the use of the head
Welding with alkaline stainless steel electrodes, due to the poor welding process of alkaline stainless steel electrodes, the pollution to the welded steel plate is serious, and it is troublesome for welders to clean up

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0070] The preparation method of the above-mentioned special stainless steel welding rod for the head is to dry and mix the raw materials of the coating with a V-type mixer according to the proportion, add 19%-25% of the weight of the coating weight of water glass and mix evenly, and then send it into the hydraulic press The belly and welding core are baked at low, medium and high temperature, the low temperature baking temperature is 30℃-60℃, the medium temperature baking temperature is 80℃-150℃, and the high temperature baking temperature is 330℃-360℃.

[0071] The water glass is potassium sodium water glass with a concentration of 30-40 Be°.

[0072] Marble, dolomite: decomposed into CaO, MgO and CO under the action of arc heat 2 It is a commonly used slagging and gas generating material in the manufacture of welding rods, which can improve the alkalinity of slag.

[0073] Fluorite: A certain amount of fluorite can reduce the surface tension of liquid metal, improve the fluidity o...

Embodiment 1

[0085] Take the solder core composition (wt%): C: 0.04%, S: 0.010%, Mn: 1.98%, P: 0.018%, Si: 0.15%, Cr: 20.30%, Ni: 10.03%, Mo: 0.03%, Cu: 0.03%, N: 0.02%, the remainder is a chromium-nickel stainless steel core with Fe and impurities.

[0086] Take the medicine skin, the weight of each component in the medicine skin is as follows:

[0087] Contains CaCO 3 98% of marble 5Kg; containing CaCO 3 55%, MgCO 3 44% dolomite 11Kg; F 60% cryolite 3Kg; CaF 2 97.50% fluorite 1Kg; containing TiO 2 97.50% natural rutile 49Kg; containing K 2 O+Na 2 O16.50% potassium sodium titanate 2Kg; containing SiO 2 43.20%, Al 2 O 3 25.0% composite mica 4Kg; containing SiO 2 64.30%, Al 2 O 3 17.80%, K 2 O+Na 2 O14.0% feldspar powder 4Kg; containing Cr74.50% micro-carbon ferrochrome 10Kg; containing Mn 99.70% electrolytic manganese 3.7 Kg; containing Fe 3 O 4 96.90% ferroferric oxide 3.5Kg; Ti36% ferro-titanium 3Kg; CMC 0.8Kg.

[0088] After mixing the above powders evenly, add 16Kg of potassium sodium wa...

Embodiment 2

[0092] This example is the same as Example 1 except that the weight of each component in the drug skin is different.

[0093] The weight of each component in the medicine is as follows: Contains CaCO 3 98% marble 8.5Kg; containing CaCO 3 55%, MgCO 3 44% dolomite 15Kg; F 60% cryolite 4Kg; CaF 2 97.50% fluorite 3Kg; containing TiO 2 97.50% natural rutile 38Kg; containing K 2 O+Na 2 O 16.50% potassium sodium titanate 5Kg; containing SiO 2 43.20%, Al 2 O 3 25.0% composite mica 4Kg; containing SiO 2 64.30%, Al 2 O 3 17.80%, K 2 O+Na 2 O14.0% feldspar powder 5Kg; Cr74.50% micro-carbon ferrochrome 8Kg; Mn 99.70% electrolytic manganese 3.7Kg; Fe 3 O 4 96.90% ferroferric oxide 4Kg; Ti36% ferro-titanium 4Kg; CMC 0.8Kg.

[0094] The resultant head was subjected to a full melting value welding test with a stainless steel electrode. The deposited metal composition: Cr 19.30%%, Ni 9.27%, C 0.05%, Mn 1.31%, Si 0.38%, Mo 0.04%, Cu 0.02 %, S0.010%, P 0.025%, the balance is unavoidable impuritie...

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Abstract

The invention discloses a stainless steel welding electrode special for an end socket and a preparation method of the stainless steel welding electrode. The stainless steel welding electrode special for the end socket is composed of a core wire and a coating wrapping the surface of the core wire. The core wire is a stainless steel core with few Si, S and P, and the weight of the coating is 30%-45%of the weight of the adopted core wire. The coating comprises, by weight percent, components including 5.0%-9.0% of marble, 10.0%-15.0% of dolomite, 2.0%-5.0% of cryolite, 0%-2.0% of fluorite, 30.0%-50.0% of natural rutile, 1.0%-3.0% of sodium potassium titanate, 2.0%-5.0% of compound mica, 4.0%-5.0% of feldspar powder, 6.0%-10.0% of micro-carbon ferro chrome, 3.0%-4.0% of electrolytic manganese,3.0%-4.0% of ferroferric oxide, 2.0%-5.0% of ferrotitanium and 0.8%-1.0% of CMC. The stainless steel welding electrode is good in slag flowability during welding, stable in electric arc, moderate inelectric arc blowing force, uniform in slag covering, small in spattering and good in deslagging and all-position operability.

Description

Technical field [0001] The invention relates to the field of welding materials, in particular, to a special stainless steel welding electrode for a head without cracking in a suspension forming process after a stainless steel plate is welded and a preparation method thereof. Background technique [0002] The head is an indispensable and important part of pressure vessel equipment in many industries from petrochemical, atomic energy to food and pharmaceutical industries. [0003] The head is the end cap on the pressure vessel and is a main pressure-bearing part of the pressure vessel. The role played is the sealing effect. First, the upper and lower bottoms of the tank-shaped pressure vessel are made, and the second is that the pipe is at the end and is not going to extend forward. Then a head is used to seal the pipe in the form of welding. There are blind plates and caps that are similar to the functions of the head, but those two products are detachable. After the head is weld...

Claims

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Application Information

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IPC IPC(8): B23K35/365B23K35/40
Inventor 郑子行韩海舰李典钊乔良燕文进杨天文
Owner TIANJIN BRIDGE WELDING MATERIALS GROUP
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