CN101758336A - Repair welding process for ZL205A casting and matched special cracking resistant welding wire thereof - Google Patents
Repair welding process for ZL205A casting and matched special cracking resistant welding wire thereof Download PDFInfo
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- CN101758336A CN101758336A CN 200810230079 CN200810230079A CN101758336A CN 101758336 A CN101758336 A CN 101758336A CN 200810230079 CN200810230079 CN 200810230079 CN 200810230079 A CN200810230079 A CN 200810230079A CN 101758336 A CN101758336 A CN 101758336A
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Abstract
The invention relates to a repair welding process for a ZL205A casting, which adopts a welding material having consistent components with a welding body. The invention also demands for protecting a matched special cracking resistant welding wire of the repair welding process for a ZL205A casting. The welding wire material comprises the following components in percentage by weight: 4.6-5.3 percent of Cu, 0.3-0.5 percent of Mn, 0.15-0.35 percent of Ti, 0.15-0.25 percent of Cd, 0.05-0.3 percent of V, 0.05-0.2 percent of Zr, 0.005-0.06 percent of B, 0.001-1 percent of M and the balance of Al. M is concretely one or any combination of Ce, La and Y. The invention overcomes the defect of heat cracks of the repair welding of the ZL205A alloy casting and effectively solves the problem of easy heat cracking of the repair welding of high-toughness ZL205A alloy concretely by microalloying through adding trace rare-earth elements.
Description
Technical field
The present invention relates to metal solder welding wire field, a kind of ZL205A repair welding of casting welding procedure and matched special cracking resistant welding wire thereof are provided especially.
Background technology
According to Fig. 1 and Fig. 2 as can be known, Al～Cu alloy Cu content is in solid fusing point 5.65%, hot cracking tendency maximum from the principle.But this is under the ideal conditions, and liquidoid is to be offset slightly to left down in the actual production.ZL205A cupric 4.6～5.3% is in the more serious scope of hot cracking tendency.
Therefore foundry goods is when repair welding, and the repair welding welding zone easily produces the fire check defective, and its macro morphology such as Fig. 3 illustrate.The general requirement of technical conditions, definitely can not there be the fire check defective in foundry goods, because fire check can cause parts fracture or the like many serious engineering problems.
Now, the research of relevant repair welding of casting is less, does not see the report of this aspect.The inventor had once carried out a series of tests of welding procedure aspect, as adopted different welding method (argon arc welding, wire feed weldering), different technological parameters, different groove processing etc.All do not obtain obvious improvement.Tracing it to its cause, is that the hot tearing sensitiveness of this material own is too strong, can not address this problem by the repair welding adjustment, and can only be to try every possible means to reduce its hot tearing sensitiveness.
People catch at technique effect better the special cracking resistant welding wire and the process matched therewith thereof that are used to eliminate ZL205A alloy-steel casting repair welding fire check defective of low hot tearing sensitiveness.Therefore the inventor has carried out the further investigation of this respect on this basis, and then wishes crack resistance type welding wire and process matched therewith that exploitation is special-purpose.
Summary of the invention
The purpose of this invention is to provide a kind of ZL205A repair welding of casting welding procedure and matched special cracking resistant welding wire thereof that can be used to eliminate ZL205A alloy-steel casting repair welding fire check defective.
The present invention be directed to aforementioned ZL205A alloy-steel casting repair welding fire check problem, in conjunction with casting associated hot rift opinion, adopt hot tearing ring method, a kind of new welding process and supporting special welding wire thereof have been developed, adopt this welding wire and cooperate corresponding welding procedure, can reach the purpose of eliminating or reducing ZL205A alloy-steel casting repair welding fire check, obviously be better than prior art.
ZL205A repair welding of casting welding procedure of the present invention, it is characterized in that: described ZL205A repair welding of casting welding procedure specifically: adopt and weld the consistent welding material of body composition, wherein except Al, also include each following constituent of quality percentage composition: Cu:4.6～5.3%, Mn:0.3～0.5%, Ti:0.15～0.35%, Cd:0.15～0.25%, V:0.05～0.3%, Zr:0.05～0.2%, B:0.005～0.06%.
The preferred content of ZL205A repair welding of casting welding procedure of the present invention is: the solder wire material that satisfies following compositions and the requirement of quality percentage composition is used in described ZL205A repair welding of casting welding: Cu:4.6～5.3%, Mn:0.3～0.5%, Ti:0.15～0.35%, Cd:0.15～0.25%, V:0.05～0.3%, Zr:0.05～0.2%, B:0.005～0.06%, M:0.001～1%, surplus are Al; Described M is specially Ce, La, Y thrin or its any combination.
The further preferred content of ZL205A repair welding of casting welding procedure of the present invention is:
The solder wire material that satisfies following compositions and the requirement of quality percentage composition is used in described ZL205A repair welding of casting welding: Cu:4.6～5.3%, Mn:0.3～0.5%, Ti:0.15～0.35%, Cd:0.15～0.25%, V:0.05～0.3%, Zr:0.05～0.2%, B:0.005～0.06%, M:0.1～0.25%, surplus are Al; Described M is specially Ce, La, Y thrin or its any combination.
The matched special cracking resistant welding wire of the also claimed ZL205A as mentioned above of the present invention repair welding of casting welding procedure, it is characterized in that: the solder wire material that satisfies following compositions and the requirement of quality percentage composition is used in described ZL205A repair welding of casting welding: Cu:4.6～5.3%, Mn:0.3～0.5%, Ti:0.15～0.35%, Cd:0.15～0.25%, V:0.05～0.3%, Zr:0.05～0.2%, B:0.005～0.06%, M:0.001～1%, surplus is Al; Described M is specially Ce, La, Y thrin or its any combination.
The further preferred content of matched special cracking resistant welding wire of ZL205A repair welding of casting welding procedure of the present invention is: the solder wire material that satisfies following compositions and the requirement of quality percentage composition is used in described ZL205A repair welding of casting welding: Cu:4.6～5.3%, Mn:0.3～0.5%, Ti:0.15～0.35%, Cd:0.15～0.25%, V:0.05～0.3%, Zr:0.05～0.2%, B:0.005～0.06%, M:0.1～0.25%, surplus are Al.Described M is specially Ce, La, Y thrin or its any combination.
Wherein:
1) when M content is: in the time of 0.001～0.1%,, to reducing the alloy hot tearing certain effect is arranged, but effect is not too obvious because content is lower;
2) when M content be: in the time of 0.1～0.25%, be more excellent component content, can reach this moment neither reduces alloy mechanical performance, and significant reduction alloy hot tearing effect is arranged again;
3) when M content be: in the time of 0.25～1%, content is higher, though significant reduction alloy hot tearing effect is arranged, reduces alloy mechanical performance;
The described welding wire that is used to eliminate ZL205A alloy-steel casting repair welding fire check defective is bar silk and parcel.
When reality was used, strip silk specification was diameter of phi 2.0mm, Φ 3.0mm, and Φ 3.5mm, Φ 4.0mm does not wait, and common length is that 1m is long.
The specification of plate-like silk can be selected for use as required, the most common preferred a kind ofly is: Φ 1.6mm, Φ 2.0mm, length 400m.
Use the concrete preferred operations process introduction of welding wire that is used for ZL205A alloy-steel casting repair welding fire check defective of the present invention as follows:
Rationally offer groove according to the foundry goods genetic defects, guarantee the wall light, no burr, greasy dirt, dirt etc.Adopt acetone that welding zone is cleaned up before the weldering, and carry out preheating according to conditions such as foundry goods shape, wall thickness.Welding wire is washed, and baking is done.As adopt argon arc welding, need to be equipped with run-on tab, wait arc stability after, continue to add welding wire, should slowly receive arc, prevent to produce and receive the burst check line.As adopt the wire feed weldering, directly welding gets final product.As be multilayer welding, should control the temperature difference between every layer about 80 ℃, carry out lower floor's welding again.
Principle analysis:
According to the liquid film theory, the formation of fire check is because foundry goods exists liquid film and foundry goods to be subjected to the coefficient result of tension in process of setting solidifying the latter stage intergranular, promptly be cooled to below the liquidus curve after certain temperature when alloy, dendrite contacts with each other, and is linked to be skeleton, and constantly is crowded together, there is liquid phase in intergranular but seldom, the liquid flow difficulty can not feeding, cracks under action of pulling stress.The tension that liquid film bore is:
p＝-σ/r
In the formula: σ is the surface tension of liquid film; R is the radius of curvature of liquid film concave surface.
R is determined that by thickness of liquid film thin more then r is more little for liquid film, and p is big more, and promptly the tension that can bear latter stage of alloy graining is big more.Comparison diagram 5-7, black are low melting point mutually, that is to say the liquid film that solidifies latter stage, the obvious attenuation of liquid film as can be seen, and therefore having improved the alloy heat resistanceheat resistant splits ability.If consider the surface tension of σ-liquid film, rare earth element is an active element, may reduce liquid film interfacial tension σ after the interpolation to a certain extent, increases the alloy hot cracking tendency, but compares reducing of thickness of liquid film, and liquid film interfacial tension σ is a secondary cause.
The present invention is directed to ZL205A alloy-steel casting repair welding fire check defective.It adds trace rare-earth element specifically by microalloying, has solved the easy hot tearing problem of high tough ZL205A alloy.Under equality strength, effectively prevented casting thermal fragmentation line generation of defects, its technique effect is fine, has tangible economic worth.
Description of drawings
The present invention is further detailed explanation below in conjunction with drawings and the embodiments:
Fig. 1 is the Al-Cu binary alloy phase diagram;
Fig. 2 is effective crystallization temperature interval and hot tearing relation;
Fig. 3 is a repair welding of casting district fire check defective macro morphology;
Fig. 4 is the welding wire photo;
Fig. 5 is the ZL205A alloy microscopic structure;
Fig. 6 is for adding the ZL205A alloy microscopic structure of 0.1%Y;
Fig. 7 is for adding the ZL205A alloy microscopic structure of 0.2%Y.
The specific embodiment
Embodiment 1 one kinds of ZL205A repair welding of casting welding procedure and matched special cracking resistant welding wire thereof
Described ZL205A repair welding of casting welding procedure is specifically: adopt and weld the consistent welding material of body composition, wherein except Al, also include each following constituent of quality percentage composition: Cu:5.0%, Mn:0.4%, Ti:0.20%, Cd:0.21%, V:0.18%, Zr:0.14%, B:0.03%, Y:0.175%.
The matched special cracking resistant welding wire of ZL205A repair welding of casting welding procedure as mentioned above, the solder wire material of following compositions and the requirement of quality percentage composition: Cu:5.0% is satisfied in use, Mn:0.4%, Ti:0.20%, Cd:0.21%, V:0.18%, Zr:0.14%, B:0.03%, Y:0.175%.
The described welding wire that is used to eliminate ZL205A alloy-steel casting repair welding fire check defective is bar silk and parcel.When reality was used, strip silk specification was diameter of phi 2.0mm, Φ 3.0mm, and Φ 3.5mm, Φ 4.0mm does not wait, and common length is that 1m is long.The specification of plate-like silk is: Φ 1.6mm, Φ 2.0mm, length 400m.
Above-mentioned ZL205A repair welding of casting welding procedure and matched special cracking resistant welding wire thereof are applied in the following concrete engineering practice:
Certain cabin body foundry goods, repair welding place wall thickness 17mm, groove size: 40 * 30 * 10mm.At first adopt argon arc welding, the welding of ultimate constituent welding wire produces the repair welding fire check.Adopt this patent composition welding wire when reprocessing, concrete operations: offer groove again in former repair welding zone, the fire check defective is removed clean, groove wall surface-brightening, apparent metallic luster, no burr, groove size: 45 * 35 * 12mm, with acetone groove is cleaned up, no dirt, greasy dirt are with repair welding of casting place local heat, remain on 60～80 ℃, adopt argon arc welding, gage of wire is Φ 1.6mm, welding current: 110～160A, speed of welding: 20～25m/h, the tungsten electrode diameter: Φ 3.2mm, argon flow amount: 14～20L/min divides three layers of repair welding to finish.Postwelding is through detecting a flaw the no fire check defective in repair welding zone.
Embodiment 2 one kinds of ZL205A repair welding of casting welding procedure and matched special cracking resistant welding wire thereof
Described ZL205A repair welding of casting welding procedure is specifically: adopt and weld the consistent welding material of body composition, wherein except Al, also include each following constituent of quality percentage composition: Cu:4.6%, Mn:0.3%, Ti:0.15%, Cd:0.15%, V:0.3%, Zr:0.2%, B:0.06%, Y:1%.
The matched special cracking resistant welding wire of ZL205A repair welding of casting welding procedure uses the solder wire material that satisfies following compositions and the requirement of quality percentage composition: Cu:4.6%, Mn:0.3% as mentioned above, Ti:0.15%, Cd:0.15%, V:0.3%, Zr:0.2%, B:0.06%, Y:1%.
The described welding wire that is used to eliminate ZL205A alloy-steel casting repair welding fire check defective is bar silk and parcel.When reality was used, strip silk specification was diameter of phi 2.0mm, Φ 3.0mm, and Φ 3.5mm, Φ 4.0mm does not wait, and common length is that 1m is long.The specification of plate-like silk is: Φ 1.6mm, Φ 2.0mm, length 400m.
Above-mentioned ZL205A repair welding of casting welding procedure and matched special cracking resistant welding wire thereof are applied in the following concrete engineering practice:
Certain shell casting, repair welding place wall thickness 40mm, groove size: 65 * 45 * 25mm.Directly adopt this patent composition welding wire, concrete operations: the polishing groove makes and wall surface-brightening, apparent metallic luster, no burr groove is cleaned up with acetone, no dirt, greasy dirt, with repair welding of casting place local heat, remain on 90～110 ℃, adopt argon arc welding, gage of wire is Φ 3mm, welding current: 200～250A, speed of welding: 15～18m/h, tungsten electrode diameter: Φ 4.8mm, argon flow amount: 24～28L/min divides three layers of repair welding to finish.Postwelding is through flaw detection, and the no fire check defective in repair welding zone exists.
Embodiment 3 one kinds of ZL205A repair welding of casting welding procedure and matched special cracking resistant welding wire thereof
The present embodiment content is substantially the same manner as Example 1, and its difference mainly is:
Except Al, also include each following constituent of quality percentage composition in the welding material of the welding body composition unanimity that it adopted: Cu:5.3%, Mn:0.5%, Ti:0.35%, Cd:0.25%, V:0.05%, Zr:0.05%, B:0.005%, Y:0.001%.
The matched special cracking resistant welding wire of ZL205A repair welding of casting welding procedure as mentioned above, the solder wire material of following compositions and the requirement of quality percentage composition: Cu:5.3% is satisfied in use, Mn:0.5%, Ti:0.35%, Cd:0.25%, V:0.05%, Zr:0.05%, B:0.005%, Y:0.001%.。
The described welding wire that is used to eliminate ZL205A alloy-steel casting repair welding fire check defective is bar silk and parcel.When reality was used, strip silk specification was diameter of phi 2.0mm, Φ 3.0mm, and Φ 3.5mm, Φ 4.0mm does not wait, and common length is that 1m is long.The specification of plate-like silk is: Φ 1.6mm, Φ 2.0mm, length 400m.
Above-mentioned ZL205A repair welding of casting welding procedure and matched special cracking resistant welding wire thereof are applied in the following concrete engineering practice:
Certain shell casting, repair welding place wall thickness 60mm, groove size: 55 * 35 * 32mm.The weldering of employing wire feed, this patent composition welding wire, concrete operations: the polishing groove makes and wall surface-brightening, apparent metallic luster, no burr groove is cleaned up with acetone, no dirt, greasy dirt, with repair welding of casting place local heat, remain on 120～140 ℃, the gage of wire of employing is Φ 2mm, welding current: 270～320A, speed of welding: 12～15m/h, argon flow amount: 80～90L/min divides three layers of repair welding to finish.Postwelding is through flaw detection, and the no fire check defective in repair welding zone exists.
Embodiment 4
Except Al, also include each following constituent of quality percentage composition: Cu:5.0% in the welding material of the welding body composition unanimity that it adopted, Mn:0.38%, Ti:0.24%, Cd:0.21%, V:0.05%, Zr:0.01%, B:0.03%, Ce:0.001%, La:0.002%, Y:0.001%.
Above-mentioned ZL205A repair welding of casting welding procedure and matched special cracking resistant welding wire thereof are applied in the following concrete engineering practice:
Certain box casting, repair welding place wall thickness 80mm, groove size: 70 * 55 * 41mm.The weldering of employing wire feed, this patent composition welding wire.Concrete operations: the polishing groove make the wall surface-brightening, show metallic luster, no burr, with acetone groove is cleaned up, no dirt, greasy dirt, with repair welding of casting place local heat, remain on 130～150 ℃, the gage of wire of employing is Φ 2mm, welding current: 270～320A, speed of welding: 12～15m/h, argon flow amount: 100～110L/min divides four layers of repair welding to finish.Postwelding is through flaw detection, and the no fire check defective in repair welding zone exists.
Present embodiment uses one of them welding material of embodiment 1～4;
Above-mentioned ZL205A repair welding of casting welding procedure and matched special cracking resistant welding wire thereof are applied in the following concrete engineering practice:
Certain tapered foundry goods, repair welding place wall thickness 90mm, groove size: 102 * 67 * 52mm.The weldering of employing wire feed, this patent composition welding wire.Concrete operations: the polishing groove make the wall surface-brightening, show metallic luster, no burr, with acetone groove is cleaned up, no dirt, greasy dirt, with repair welding of casting place local heat, remain on 140～160 ℃, the gage of wire of employing is Φ 2mm, welding current: 320～380A, speed of welding: 8～10m/h, argon flow amount: 80～90L/min divides five layers of repair welding to finish.Postwelding is through flaw detection, and the no fire check in repair welding zone exists.
More than, now used nearly 1 year, can effectively eliminate ZL205A alloy-steel casting repair welding fire check defective really by facts have proved this welding wire for some examples in producing.
Embodiment 6
Present embodiment content and embodiment 1～4 are basic identical, and its difference mainly is:
Described is that the composition and the content of high-toughness casting aluminium copper of the low hot tearing sensitiveness of bulk material satisfies following scope: Cu:4.6-5.3% with ZL205A, Mn:0.3-0.5%, Ti:0.15-0.35%, Cd:0.15-0.25%, V:0.05-0.3%, Zr:0.05-0.2%, B:0.005-0.06%, M:0.1～0.25%, surplus are Al; Wherein: M is specially any combination of Ce, La thrin or Ce, La, Y three.
Claims (5)
1.ZL205A repair welding of casting welding procedure, it is characterized in that: described ZL205A repair welding of casting welding procedure specifically: adopt and weld the consistent welding material of body composition, wherein except Al, also include each following constituent of quality percentage composition: Cu:4.6～5.3%, Mn:0.3～0.5%, Ti:0.15～0.35%, Cd:0.15～0.25%, V:0.05～0.3%, Zr:0.05～0.2%, B:0.005～0.06%.
2. according to the described ZL205A repair welding of casting of claim 1 welding procedure, it is characterized in that:
The solder wire material that satisfies following compositions and the requirement of quality percentage composition is used in described ZL205A repair welding of casting welding: Cu:4.6～5.3%, Mn:0.3～0.5%, Ti:0.15～0.35%, Cd:0.15～0.25%, V:0.05～0.3%, Zr:0.05～0.2%, B:0.005～0.06%, M:0.001～1%, surplus are Al; Described M is specially Ce, La, Y thrin or its any combination.
3. according to the described ZL205A repair welding of casting of claim 2 welding procedure, it is characterized in that:
The solder wire material that satisfies following compositions and the requirement of quality percentage composition is used in described ZL205A repair welding of casting welding: Cu:4.6～5.3%, Mn:0.3～0.5%, Ti:0.15～0.35%, Cd:0.15～0.25%, V:0.05～0.3%, Zr:0.05～0.2%, B:0.005～0.06%, M:0.1～0.25%, surplus are Al.
4. the matched special cracking resistant welding wire of ZL205A repair welding of casting welding procedure according to claim 1, it is characterized in that: the solder wire material that satisfies following compositions and the requirement of quality percentage composition is used in described ZL205A repair welding of casting welding: Cu:4.6～5.3%, Mn:0.3～0.5%, Ti:0.15～0.35%, Cd:0.15～0.25%, V:0.05～0.3%, Zr:0.05～0.2%, B:0.005～0.06%, M:0.001～1%, surplus is Al; Described M is specially Ce, La, Y thrin or its any combination.
5. according to the matched special cracking resistant welding wire of the described ZL205A repair welding of casting of claim 4 welding procedure, it is characterized in that: the solder wire material that satisfies following compositions and the requirement of quality percentage composition is used in described ZL205A repair welding of casting welding: Cu:4.6～5.3%, Mn:0.3～0.5%, Ti:0.15～0.35%, Cd:0.15～0.25%, V:0.05～0.3%, Zr:0.05～0.2%, B:0.005～0.06%, M:0.1～0.25%, surplus is Al.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102079019A (en) * | 2011-01-19 | 2011-06-01 | 浙江银宇焊接新材料科技有限公司 | Multi-element compounded micro-alloyed Al-Mg-Sc series welding wire and preparation method thereof |
| CN111015013A (en) * | 2019-12-19 | 2020-04-17 | 北京工业大学 | Flux-cored wire for 2A12 high-strength aluminum alloy non-consumable electrode inert gas shielded welding |
| CN113245744A (en) * | 2021-07-05 | 2021-08-13 | 西安鑫红石科技有限责任公司 | Aluminum-copper alloy casting repair material and repair method |
-
2008
- 2008-12-24 CN CN 200810230079 patent/CN101758336A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102079019A (en) * | 2011-01-19 | 2011-06-01 | 浙江银宇焊接新材料科技有限公司 | Multi-element compounded micro-alloyed Al-Mg-Sc series welding wire and preparation method thereof |
| CN111015013A (en) * | 2019-12-19 | 2020-04-17 | 北京工业大学 | Flux-cored wire for 2A12 high-strength aluminum alloy non-consumable electrode inert gas shielded welding |
| CN113245744A (en) * | 2021-07-05 | 2021-08-13 | 西安鑫红石科技有限责任公司 | Aluminum-copper alloy casting repair material and repair method |
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Application publication date: 20100630 |