CN1030381C - Special cast iron electric welding rod - Google Patents
Special cast iron electric welding rod Download PDFInfo
- Publication number
- CN1030381C CN1030381C CN 92106202 CN92106202A CN1030381C CN 1030381 C CN1030381 C CN 1030381C CN 92106202 CN92106202 CN 92106202 CN 92106202 A CN92106202 A CN 92106202A CN 1030381 C CN1030381 C CN 1030381C
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- cast iron
- welding rod
- welding
- carbon
- electric welding
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Abstract
The present invention relates to a low-alloy steel welding rod for welding cast iron, which has the chemical components by the weight percentage as at most 0.15% of C, at most 0.70% of Si, at most 0.50 to 1.50 of Mn, at most 1% to 3 % of Ni, at most 0.2 % to 0.5 %of Nd, at most 0.5 % to 1.0% of Nd, at most 0.03% of P and S, and Fe as the rest. The welding rod can be suitable for recovering the defect of the cast iron, and can be used for welding low-carbon steel, medium-carbon steel, high-carbon steel, alloy steel and steel with the cast iron.
Description
The invention belongs to the cast iron welding material.
Welding cast iron mostly adopts electrode for cast iron both at home and abroad at present.These welding materials mostly are to contain the high element silicon of high-carbon, and as the welding rod that Russian Patent 757284 is introduced, carbon content is between 3%～4%, and silicone content is between 1～3.5%, and other can add molybdenum, nickel, copper, aluminum element as required.The welding rod chemical composition that Russian Patent 622608 is introduced, the content of carbon is between 3.4～3.8%, and the content of silicon is between 2.5～3.5%, and other can add alloying elements such as manganese, nickel, copper, magnesium as required.United States Patent (USP), U.S4054776 have also been introduced the technology and the electrode for cast iron of welding cast iron, and also between 2.30～3.0%, silicon is 2.64% to the content of the chemical composition carbon of its welding rod, and other alloying element is the manganese that adds as required, chromium, nickel, molybdenum etc.German patent DE 2819523 is introduced the chemical composition of electrode for cast iron, and carbon is 1～4%, and silicon is 1～5%, and nickel is 0.5～10%, and copper is 0.5～15%, and rare earth is 0.5～2%, and manganese is between 0.5～2%.Domestic and international also useful carbon steel welding cast iron spare, as the welding rod that United States Patent (USP) U.S.A4054777 introduces, its alloying element, carbon content is between 0.085～0.95%, silicone content is 2.5%, and other alloying element chromium, nickel, molybdenum, manganese equal size all are a spot of.
The welding rod of normal welding cast iron also has Z both at home and abroad
380And Z
408, the Ni-based element of the many employings of these two welding rods is main, as Z
380Welding rod nickel content is up to more than 90%, Z
408Welding rod nickel content is between 45～60%, and therefore costing an arm and a leg of this welding rod per tonly reaches 10～150,000 yuan, and is difficult for carrying out full position and large-area built-up welding.Also have both at home and abroad and adopt the mild steel arc welding electrode welding cast iron, as J
427Welding rod, its chemical composition (%) is: C≤0.12; Mn≤1.25; Si≤0.9, but the effect of welding can not be satisfactory.
The present invention seeks to design a kind of low-alloy welding rod and replace high-carbon high-silicon cast iron welding rod and nickel base alloy covered electrode, reduce the welding rod cost to reach, simplify welding procedure and realize good welding effect.
Welding rod slag system of the present invention is to adopt prior art low hydrogen type slag system, belongs to ultralow hydrogen type deposited metal hydrogen content H
2≤ 1ml/100g adds in coating and stops the carbon diffusion element, the strong carbide element and the nodulizer of strong desulfurization dehydrogenation material and fixed carbon.These measures can prevent the appearance of air chill and martensite hardened structure.The chemical composition of welding rod deposited metal of the present invention is as follows: (weight %) C=0.15; Si=0.70; Mn=0.50～1.50; P and S≤0.030; Ni=1.0～3.0; Nb=0.2～0.5; Nd=0.5～1.0; All the other are Fe.Because add strong carbide forming element niobium in this welding rod, this element can prevent carbon diffusion, and with nitrogen oxygen stronger affinity is arranged, and can reduce the gas content in the weld metal.This welding rod has also added rear earth element nd (Nd) in addition, this element also can reduce gas oxygen in the metal, hydrogen, ammonia content, as nodulizer, the form of carbon when it can improve welding cast iron, this element is also helpful to the sulphur phosphorus content of removing in the weld metal in addition.
Characteristics of the present invention adopt low-carbon and low-alloy exactly, contain niobium and rear earth element nd, and its high-carbon Silel cast iron welding rod different from the past also is different from alloy electrodes such as heavy alloyed Ni base and other cuprics.
The invention has the advantages that this welding rod is a kind of Special Casting Iron welding rod with obdurability, the cracking resistance of deposited metal is fine, combines smoothly with base material, is applicable to the reparation of multiple cast iron.
Be this inventive embodiment below.The Anshan iron and steel plant first power plant blast furnace blower reservoir, owing to after long-term the use wearing and tearing have taken place, the reservoir flange that has is because of the local jackknifing of accident.The welding rod that we have adopted us newly to develop has successfully carried out built-up welding to blast furnace blower reservoir (grey cast-iron) wearing part, and breaking portion has been carried out the butt joint repair welding, and maximum weld thickness is 100mm.Thereby a difficult problem that does not solve before having solved always.Welding not only for company has saved millions of first funds, but also has guaranteed the ordinary production of blast furnace after various detection quality is good.To the leak of cast iron pipe, adopted other electrode for cast irons and method all not to be resolved in the past in addition, the welding rod that adopts us newly to develop carries out soldering and has obtained success.
Claims (1)
1, a kind of extraordinary low-alloy welding rod of welding cast iron is characterized in that the chemical composition (percentage by weight) of this welding rod deposited metal is: C=0.15; Si=0.70; Mn=0.50～1.50; Ni=1.0～3.0; Nb=0.2～0.5; Nd=0.5～1.0; P and S≤0.030, all the other are Fe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92106202 CN1030381C (en) | 1992-05-21 | 1992-05-21 | Special cast iron electric welding rod |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92106202 CN1030381C (en) | 1992-05-21 | 1992-05-21 | Special cast iron electric welding rod |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1068767A CN1068767A (en) | 1993-02-10 |
| CN1030381C true CN1030381C (en) | 1995-11-29 |
Family
ID=4941894
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 92106202 Expired - Fee Related CN1030381C (en) | 1992-05-21 | 1992-05-21 | Special cast iron electric welding rod |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1030381C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1323799C (en) * | 2005-01-21 | 2007-07-04 | 中国船舶重工集团公司第七二五研究所 | Low alloy high-toughness electric welding rod containing copper |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100406191C (en) * | 2005-11-17 | 2008-07-30 | 西安理工大学 | Homogeneous electric welding rod/flame welding wire for welding gray cast iron and ductile cast-iron |
| CN101850478A (en) * | 2010-06-21 | 2010-10-06 | 西安理工大学 | Welding material for rapidly welding and repairing defects of large-scale grey iron casting and repairing method thereof |
| CN101850479A (en) * | 2010-06-21 | 2010-10-06 | 西安理工大学 | Welding material for rapidly welding and repairing defects of large-scale ductile iron castings and repairing method |
| CN104384756A (en) * | 2014-09-11 | 2015-03-04 | 湖南安化湘安钨业有限责任公司 | Method for improving welding performance of general carbon steel covered electrodes |
-
1992
- 1992-05-21 CN CN 92106202 patent/CN1030381C/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1323799C (en) * | 2005-01-21 | 2007-07-04 | 中国船舶重工集团公司第七二五研究所 | Low alloy high-toughness electric welding rod containing copper |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1068767A (en) | 1993-02-10 |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |