DE1433162A1 - Electrode for arc welding as well as for melting high-strength cast iron and gray cast iron - Google Patents

Description

ZU JlN jR ΡΛΐ, NTAHSLiLDMG Zentralnyi Nautschno-issledowatelskij Institute technologic. i maschinostrojenija

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ZUR LiailTBOGSNiJ: HKBIßSUMG SOWIS ZUM AUSJHMKLZBN VOH HoaüiasTaä guuusibsn uni> gray cast iron

01 Lichtb * ^ enschwöi5 = 8unf5 of high-strength cast iron and gray cast iron without preheating ("cold welding) as well as smelting is» to a considerable extent, due to the high Carbon content in the cast core made more difficult.

As a result, the technology of XaItschwelosung | in the arc and the smelting of cast iron - mainly based on this - reduce the negative influence of carbon on the metal of the seam and on the smelting zone during smoldering or melting. This is accomplished in the following two ways; 1) by decarburizing the metal in the seam from carbon (by Use of steel electrodes with an oxidizing coating or by performing the welding process under an oxidizing flux). 2) By forming a on the cast iron melted metal, in which practically no iron carblings are formed (by using of Elsen-Nickel- Copper-Nickel- or Sisen- Bäipferelektoroden) or by creating conditions that prevent the formation of such carbides (by using cast iron electrodes or steel electrodes with gray coating).

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However, all of the above methods can be electrical 'Welding and melting of high-strength cast iron and gray cast iron as well as the electrodes used ensure a high value and plasticity of the melted iiieball in the area of thermal vvirking

The present lirfindun »proposes a new ugly trode for welding high-strength cast iron and gray gas without Preheating, which offers the possibility of a new one Way the harmful influence of that contained in cast iron Carbon on the quality of the molten metal.

The advantage of this new electrode is that in their composition such alloying elements as Titanium, Vanadium, Wiot ^ nthalfcen are, which when welding * or melting with carbon • form corbids of the MenSt type »

It is acknowledged that by adding or introducing titanium, vanadium and itfiob in JC j hl en s to ff steel durability can be considerably reduced or even completely eliminated. '^ - - ■■ -...- - - ^; ·

This is due to the fact that iitan. Vanadin and Uiob, -'eiche only unrelated carbides bit out the carbon lead out of the solid laisen solution and thereby reduce the ability of the steel to metastable iVandiungen. to a complete bond of carbon with titanium, vanadium or he is mob; required, däys of litan, vanadium or for the mineral content is like 4s7, or 7il,

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* Jpi the hardness fee dco etahle completely au eli rcn, the titanium =, Vnn .-. vlin, oCer I.'lotogchalt can thus be reduced Unoc the dissolved carbon in iron is not 0.30-0.35 exceeds

c / Will in the Guißccchtnolsene, about 0, C-IjJ? / <? carbon

contains metal tins, vanadium or niobium "and their grains bination introduced, so kurui die dur chhürt barke it der Unwanted madnesses are eliminated.

^ s has shown -sioh, dnc also at the Dersohvrelcsung or the Aufechmeluung τοη ameeiTcn Cusceisenteilen seams obtained with a Hrinell hardness of 180-190 units (H ^) will know which ones can be easily edited with epannbo

When welding τοη GuCwlsen without preheating affects the presence of lumpy elbows such as titanium and vanadium and Niob la Metnil der Uaht also favored the reduction the deterred Sohloht In the Itoht neighboring zones from what is likely to result from the diffusion of the carbon from the Sohuelzzone in the Hahtmetall is connected.

A net-logistic analysis can be used to wise, adoss when inscribed on the Guoteisen of first layer by means of electrodes, which ILnrbidblldende Bleuente contained, In the Schoelaaone no senentite awlscbe layer, but rather 1 «essentially a Marteneit-in-between- acliicht is formed, which without deletion

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lay a second layer is annealed

Zementitst, Ilen, used as edging of graphite appear, are mainly present in the base metal outside of the melting zone, but they influence, as a result Its small dimensions and intermittent nature is very poor: the machinability of the welded joint

The alloying elements can be found in the material which the electrode rod is made or in the composition of the layer enveloping the electrode or, of course, in the material of the rod as well as in the material of the envelope are introduced.

The composition of the 31-ectords can be any contain one of the karbade-urld end elements, i.e. iitan, Vanadium or niobium, or any two of the three approached Elements also contain all three, i.e. titanium, vanadium or jiob.

To a complete binding of the carbon by.! tan, vanadium or niobium, as already mentioned above mentioned, requires that the ratio of the content of these elements in the electrode to the carbon content in the ratio of 4: 1 »7: 1, 8: 1.

if the ka ^ bifi- ^ forming elements in the unhousing If the electrode layer is inserted, it must be the same be composed as follows: 60-70J & ierrovanadine or ferroniobium, or 40-50 ^ titanium powder, 6-18 # marble or

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BAD ORiSINAL

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U33162

Dolomite, 6-18Jl ilußepat üdar ierrotitsji, 1-10% ferroslliciua odor feldspar 1-1OJt Pott & sohe dder potash nitrate, 2O- * OJS Wa33ürgla3 voia The weight of all components.

Among other things, at the Öchwöiesen of Ouaaeisen, using the fully lamellar electrodes on aeachaolaen «Metal belongs to your lerrit- ! Carbide class.

The iianbjd ^ bildendon filaments may be in the Hahtmatall also by using IiI θ kt rods, which make a rod have alloy steel *

may be »XUM difference from the one described an electrode can be used »whose rod fol- f

zuaittaenec bzun / j; Carbon has a maximum of 3%, silicon has a maximum of 1.0%, manganese has a maximum of 0.5 % sulfur and phosphorus has a maximum of 0.04%, vanadium or niobium 9-19% or titanium 4-1% The addition of the protective layer of the electrode is as follows:

1CH2O ^ fluorspar or 1-10 ^ ferrotltan, * errosilicon or 1-lOjS feldspar 1-lOjC carbon ar »en ferrontangsa» 1-1 OJt Potash or Kali-Saltpeter l-lüjL

up can sur Var'vendtin.? electrodes are also recommended

the "whose rod fnlgende composition has ι 1) carbon höchstena O, 2J (311 iciua höchatens 1.9 ^, Uangan most 3>, ^ 5, niobium 3-1955" 2) Carbon Not more than 0,2Jf. Silicon not more than 1%, manganese maximum 0.5%, titanium 4%

of the proposed electrodes i'Ur the Idchtbogen- ; and record! «s of cast iron without preheating, results in the following, chemical additive of the boomolated metal, all carbon at most 0.2%, silicate

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at most l »0? 8 | Manganese at most Oy ^ JfcI sulfur and phosphorus at most 0.04j £ f vanadium from 6 to 1 $? * »titanium 1,8-4, OJl or iiiob 7.0-10, OJil the remainder forms iron.

When »Melting solid cast iron parts with the proposed electrodes without preheating; is the The amount of molten metal measured 180-190 ring units. This melted metal .la * is easily torn by chip removal to edit.

Vanadium is one of the listed karbj-imaging elements preferable because it is better absorbed by the seam = metal vird, ala Iiban and none. «nn-? elntoff represents, like niobium.

The arbidlo-iorun "melted onto the cast iron with the front electrode. can enter one without any difficulty ^! .> For further melding with the use of various s ^ derle ^ ierun ^ en, among them also vernchleissfeater Le τ i ο round und'T'vorfon has been

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Claims (4)

1 »Electrode for arc detection and for melting high-strength cast iron and gray cast iron, thereby known that it is necessary to eliminate the influence of carbon on the flake metal and on the melt breathing in the course of the curvature or melting, in the material of the rod or in the composition of the covering of the stick, or in the material of the stick and in the composition of the. Enveloping elements are contained which form carbides of type Jen St in the iron carbonic lci ^ ierun ^ en. 2 · Electrode for arc welding and melting of high-strength dm iron and gray, us, 'jeraäeo funct 1, thereby ^ e'.tonnzeichncit, dane as carbide-forming elements in the junction electrode iitan "vanadium, niobium, isolated" or together or also in combinations of two elements contain bind " 3 · üiüktrode for arc welding as well as melting of high-strength Gu. iron and gray cast iron straight to points 1 and 2, characterized ^ indicates that for full bonding of the carbon it; in the pig to be porked or * to be melted Ju ^ scioen duu V ^ rhkltniu den Oehultea of -itan, VarTdin and niobium for the content of carbon in cast iron "easily selected according to 4: 1, 7» 1 and 8: 1 will· 4. JJle.ictrode zur LichtbogenschwuiRsuni ¹ ; as well as for melting high-strength lurseisen and jrau »uss gemfisB BATH OFUQINAL 809810/0609 Points 1-3 consisting of a steel rod and a slectronic characterized by this, in the electrode casing 60-70Ji ferrovanadine or ferroniobium or 40-50 ^ titanium powder, 6-18J & marble or dolomite «6-18 Ji fluäepat or Perrot it an, 1 to 10 ½ of ferrosilicon or feldspar, 1 to 10 ½ of potash or potassium nitrate, and 20 to 30 ½ of water glass of the total weight all components are included. 5 · Electrode for arc welding generally the points 1-3 characterized in that in the material of the electrode rod not more than O ₉ 2 ^ carbon not more than 1-3% silicon not more than 0.5% manganese not more than 0.04% sulfur 0.04Jf phosphorus. Vanadium or Mob 9-19 $ *, or 4-lOjt titanium, are contained and in the ßlektroden-Umhfillung 10-2OJ (fluorspar or l-lOJf ierrotitan, 1-lOJi ierrosilicon or feldspar, l-10J (ierromangan 1-lOjf potash or potassium eel are contained 809810/0609