CN1137433A - Wear-resistant surfacing welding tubular solder wire - Google Patents
Wear-resistant surfacing welding tubular solder wire Download PDFInfo
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- CN1137433A CN1137433A CN 96102760 CN96102760A CN1137433A CN 1137433 A CN1137433 A CN 1137433A CN 96102760 CN96102760 CN 96102760 CN 96102760 A CN96102760 A CN 96102760A CN 1137433 A CN1137433 A CN 1137433A
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- wear
- tungsten
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- carbon alloy
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Abstract
The present invention relates to a hardfacing flux-cored electrode, belonging to the field of hardfacing material. Said electrode tube shell is made of 0.8 steel, and its interior contains (wt%) 50-65% of granular tungsten-cobalt-carbon alloy, 30-45% of iron, 0.15-0.2% of carbon, 2.8-3.2% of chromium, 1.2-1.6% of nickel, 0.6-0.8% of manganese, 0.1-0.25% of silicon and 0.15-0.2% of boron. Said electrode is extensively applicable to hardfacing repair of worn parts in the fields of mining, metallurgy, power, building material, bridging engineering and underground construction, etc..
Description
The present invention relates to a kind of wear-resistant surfacing welding tubular solder wire, particularly contain the wear-resistant surfacing welding tubular solder wire of granular tungsten cobalt carbon alloy.
In colliery, metallurgy, electric power and capital construction, using machinery in a large number, exist the machine components wear problem, for expensive part, utilize build-up welding repair method usually with the abrading section reparation.For example, when boring basic hole with rig, when geology complex structure, condition of work and when abominable, just intensity, toughness and the wearability to cutting tool for drill reparation overlay cladding proposed very high requirement.Existing technology is to adopt the built-up welding flux cored wire that contains the antifriction alloy tungsten-carbide powder to carry out the built-up welding reparation of wear-out part; This resurfacing welding material is widely used, for example U.S. Pat 3291653 has been introduced and has been utilized AISI4320 steel pipe (chemical composition Ni1.65～2%, Cr0.4～0.6%, Mo0.2～0.3%) bead welding wire of dress tungsten-carbide powder in, adopt this to contain the flux cored wire of tungsten carbide, repair with the built-up welding of oxy-acetylene overlaying method, deposited metal hardness can reach HRc63.2; Above-mentioned is the welding wire of main wear-resisting phase with tungsten-carbide powder, when being used for built-up welding reparation wear part, though can improve the hardness of overlay cladding, but for the part of working under most evil bad operating mode, its repair layer still can not satisfy instructions for use, though promptly its hardness is higher, but because general tungsten carbide is more crisp, cause when working under long-time high shock conditions, peel off in the easy crack of overlay cladding, so its durability is poor.
The object of the invention provides a kind of more wear-resistant surfacing welding tubular solder wire of high tenacity and durability that has that is used for the deposited metal layer.
The present invention is achieved by the following technical solutions, and this flux cored wire is to be managed by mild steel (for example 08 steel) to be shell, and granular tungsten cobalt carbon alloy and other metal powder are housed in shell, contains (weight %) at whole flux cored wire:
Granular tungsten cobalt carbon alloy 50～65% silicon 0.1～0.25%
Iron 30～45% boron 0.15～0.2%
Carbon 0.15～0.2%
Chromium 2.8～3.2%
Nickel 1.2～1.6%
Manganese 0.6～0.8%
Contain in the above-mentioned granular tungsten cobalt carbon alloy (percentage by weight):
Tungsten 84.8～93.3%
Cobalt 3～11%
Carbon 3.7～4.2%
Its preparation method is earlier general tungsten carbide to be milled to powder, adds cobalt powder again, forms with the powder metallurgy process sintering.In order to obtain the optimum performance of hardfacing welding wire, this granular tungsten cobalt carbon alloy is pressed following proportioning (by weight percentage):
Granularity be 10～13 order/inches account for 50～65%
Granularity be 20～40 order/inches account for 20～30%
Granularity be 40～60 order/inches account for 10～20%
In above-mentioned prescription, granular tungsten cobalt carbon alloy is main wear-resisting phase, and total content accounts for 50～65%, to guarantee wear-resisting phase amount in the flux cored wire; All the other compositions are the parent metal of support and this granular tungsten cobalt carbon alloy that bonds, and parent metal itself also participates in wear-resisting process.In grain size proportion, higher as above-mentioned coarsegrain proportioning occupancy volume, make when built-up welding tungsten cobalt carbon alloy particle be difficult for being fallen by scaling loss.
The present invention adopts granular tungsten cobalt carbon alloy to replace tungsten-carbide powder in the flux cored wire in the past as wear-resisting phase, and as can be seen from Table 1, sintered tungsten cobalt carbon alloy is compared with general tungsten carbide, and compression strength and impact flexibility all are significantly improved; The present invention is except that using granular tungsten cobalt carbon alloy, and also the metallographic structure that improves base metal hardness and refinement parent metal of the way by the control composition improves its toughness.In the present invention's prescription, chromium, nickel, boron had not only been strengthened the wearability but also the malleableize matrix of matrix, the increase of nickel content can form more martensite, but nickel, silicon all helps graphited formation, so add more chromium separating out with control graphite, chromium is stronger carbide former, can form the different carbide of multiple crystal formation, when chromium carbon content within the specific limits the time, chromium content can make alloy keep higher chromium carbon ratio, carbide morphology is changed, and the carbide of a part of M3C form is replaced by the carbide of M7C3 form, forms more M7C3 carbide, the toughness of material is improved a lot, in addition, the hardness of M7C3 carbide is much larger than the hardness of M3C carbide, thereby wearability obviously improves; Adding a certain amount of silicon can make the mechanical performance of overlay cladding obviously improve, because the silicon solid solution is in austenite, chromium meltage in primary austenite is reduced, will there be more chromium to participate in during eutectic reaction in the liquation, improved the formation that the chromium carbon ratio causes the carbide of more M7C3 form.Manganese has molten admittedly reinforcement and improves the two aspect effects of metallic matrix toughness, is again good deoxidier, can protect the not oxidated scaling loss of other alloying element, and can increase the flowability in built-up welding molten bath; When boron and tungsten add fashionablely simultaneously, wearability greatly improves, and it is fashionable to have only a kind of composition of tungsten or boron to add, and the wearability of overlay cladding is all undesirable, and in the overlay cladding of tungstenic, with the increase of boron content, wearability obviously increases, but should control within limits.
In sum, wear-resistant surfacing welding tubular solder wire of the present invention is owing to adopt granular tungsten cobalt carbon alloy as wear-resisting phase, also done suitable allotment at grain size proportion with on matrix material, make this welding wire when coming built-up welding with the technology of oxy-acetylene argon arc-welding built-up welding or submerged arc overlay welding, the overlay cladding that is obtained is compared with the wear-resisting welding wire of the tubulose that used the general tungsten carbide powder in the past, when under intense impact, working, the toughness and the wearability of overlay cladding all are significantly improved, thereby have improved the durability that is repaired workpiece widely.
Introduce embodiment below.
Each listed embodiment of table 2 is my research institute five kinds of prescriptions by the RDW-CrNiB wear-resistant surfacing welding tubular solder wire by name of the present invention's development, among the embodiment 1 to 3, contain (weight %) tungsten 87% in the granular tungsten cobalt carbon alloy, cobalt 9.3%, carbon 3.7%, the method for production of granular tungsten cobalt carbon alloy is general tungsten carbide to be broken into 0.6 to 3.6 micron powder, with the cobalt is binding agent, with powder metallurgy process its sintering is formed, its grain size proportion (weight %) be 10～13 order/inches account for 60%, 20～40 order/inches account for 25%, 40～60 order/inches account for 15%; Among the embodiment 4 to 5, contain (weight %) tungsten 89%, cobalt 7% in the granular tungsten cobalt carbon alloy, carbon 4%, method for production is with embodiment 1, grain size proportion (weight %) be 10～13 order/inches account for 65%, 20～40 order/inches account for 20%, 40～60 order/inches account for 15%.The wear-resisting welding wire of various tubuloses that the listed prescription of employing table 2 is made is compared with the flux cored wire that prior art is equipped with the general tungsten carbide powder, the overlay cladding performance is significantly improved, for example: in wuhan yangtze river highway bridge Bridge Pier Construction, adopt 2.5 meters drilled piles of Φ, drilling depth is 27 meters in the rock stratum, because geological condition is very abominable, drill bit is unbalance stress in broken rock work, be under the intense impact, hobboing cutter wearing and tearing on the drill bit are very fast, and durability descends, and has a strong impact on construction speed.After adopting prior art tungsten carbide flux cored wire to come built-up welding to repair hobboing cutter, this hobboing cutter durability can drilling depth be 10～15 meters generally, and utilize the granular tungsten cobalt of the present invention carbon alloy flux cored wire is that the RDW-CrNiB wear-resistant surfacing welding tubular solder wire is when coming built-up welding to repair this hobboing cutter, each durability average out to of repairing the back hobboing cutter creeps into 30 meters degree of depth continuously, has accelerated construction speed widely.
The performance of the dissimilar wear-resisting phases of table 1
| Wear-resisting facies type | Compression strength Kg/mm2 | Impact flexibility KgM/cm2 |
| Sintered tungsten cobalt carbon alloy | 460 | 0.26 |
| General tungsten carbide | 156～162 | 0.1 |
The prescription (% by weight) of table 2 CrNiB wear-resistant surfacing welding tubular solder wire
| Embodiment | Granular tungsten cobalt carbon alloy | Iron | Carbon | Chromium | Nickel | Manganese | Silicon | Boron |
| 1 | 65 | 30 | 0.15 | 2.8 | 1.2 | 0.6 | 0.1 | 0.15 |
| 2 | 60 | 33.8 | 0.2 | 3.2 | 1.6 | 0.8 | 0.25 | 0.15 |
| 3 | 62 | 32.3 | 0.2 | 3 | 1.4 | 0.7 | 0.2 | 0.2 |
| 4 | 55 | 39.4 | 0.15 | 3.1 | 1.5 | 0.6 | 0.1 | 0.15 |
| 5 | 50 | 45 | 0.15 | 2.8 | 1.2 | 0.6 | 0.1 | 0.15 |
Claims (3)
1, wear-resistant surfacing welding tubular solder wire is characterized in that: contain (percentage by weight) at this flux cored wire:
Granular tungsten cobalt carbon alloy 50～65% manganese 0.6～0.8%
Iron 30～45% silicon 0.1～0.25%
Carbon 0.15～0.2% boron 0.15～0.2%
Chromium 2.8～3.2%
Nickel 1.2～1.6%
2, wear-resistant surfacing welding tubular solder wire according to claim 1 is characterized in that: contain in the described granular tungsten cobalt carbon alloy (percentage by weight):
Tungsten 84.8～93.3%
Cobalt 3～11%
Carbon 3.7～4.2%
3, wear-resistant surfacing welding tubular solder wire according to claim 1 is characterized in that: the grain size proportion (percentage by weight) of described granular tungsten cobalt carbon alloy is:
Granularity 10～13 orders/inch 50～65%
Granularity 20～40 orders/in2 0～30%
Granularity 40～60 orders/inch 10～20%
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN96102760A CN1053134C (en) | 1996-03-27 | 1996-03-27 | Wear-resistant surfacing welding tubular solder wire |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN96102760A CN1053134C (en) | 1996-03-27 | 1996-03-27 | Wear-resistant surfacing welding tubular solder wire |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1137433A true CN1137433A (en) | 1996-12-11 |
| CN1053134C CN1053134C (en) | 2000-06-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN96102760A Expired - Fee Related CN1053134C (en) | 1996-03-27 | 1996-03-27 | Wear-resistant surfacing welding tubular solder wire |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101380698B (en) * | 2008-10-09 | 2011-08-10 | 苏州新锐硬质合金有限公司 | Novel tubular hard surfacing material |
| CN102223982A (en) * | 2008-11-21 | 2011-10-19 | 卡特彼勒公司 | Abrasion resistant composition |
| US9475154B2 (en) | 2013-05-30 | 2016-10-25 | Lincoln Global, Inc. | High boron hardfacing electrode |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2280223A (en) * | 1939-03-10 | 1942-04-21 | Dumpelmann Richard | Coated electrode and welding rod |
| GB1034421A (en) * | 1962-01-26 | 1966-06-29 | Erling Jensen | Improvements in tube making machines |
| US3291653A (en) * | 1964-01-30 | 1966-12-13 | Paper Calmenson & Co | Hard facing treatment of steel bodies |
| US3329487A (en) * | 1965-02-15 | 1967-07-04 | Firth Sterling Inc | Sintered three-phase welding alloy of fe3w3c, wc, and fe |
-
1996
- 1996-03-27 CN CN96102760A patent/CN1053134C/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101380698B (en) * | 2008-10-09 | 2011-08-10 | 苏州新锐硬质合金有限公司 | Novel tubular hard surfacing material |
| CN102223982A (en) * | 2008-11-21 | 2011-10-19 | 卡特彼勒公司 | Abrasion resistant composition |
| US8721761B2 (en) | 2008-11-21 | 2014-05-13 | Caterpillar Inc. | Abrasion resistant composition |
| AU2009318054B2 (en) * | 2008-11-21 | 2015-03-26 | Caterpillar Inc. | Abrasion resistant composition |
| CN102223982B (en) * | 2008-11-21 | 2015-04-15 | 卡特彼勒公司 | Abrasion resistant composition |
| US9475154B2 (en) | 2013-05-30 | 2016-10-25 | Lincoln Global, Inc. | High boron hardfacing electrode |
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| Publication number | Publication date |
|---|---|
| CN1053134C (en) | 2000-06-07 |
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