CN107470849A - Mould corrosion location renovation technique - Google Patents
Mould corrosion location renovation technique Download PDFInfo
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- CN107470849A CN107470849A CN201710691373.1A CN201710691373A CN107470849A CN 107470849 A CN107470849 A CN 107470849A CN 201710691373 A CN201710691373 A CN 201710691373A CN 107470849 A CN107470849 A CN 107470849A
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- mould
- soldering
- renovation technique
- corrosion location
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P6/00—Restoring or reconditioning objects
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/04—Welding for other purposes than joining, e.g. built-up welding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/16—Arc welding or cutting making use of shielding gas
- B23K9/173—Arc welding or cutting making use of shielding gas and of a consumable electrode
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Heat Treatment Of Articles (AREA)
Abstract
The invention provides a kind of mould corrosion location renovation technique, comprise the following steps：Step 1), remove the cast gate position being corroded in mould and form position to be processed；Step 2), the pre- hot mould of thermosetting is carried out to the mould；Step 3), soldering is carried out using precipitation hardening type wlding to the position to be processed in the hot mould and forms soldering position；Step 4), soldering position is finished, the soldering position is recovered to original moulding at the cast gate position；Step 5), the mould is heated, the wlding at soldering position is hardened by precipitation.By technical scheme, rear mold is repaired by using above-mentioned renovation technique, the anti-erosion life at cast gate position is brought up to more than 8000 moulds time from 2000 moulds.
Description
Technical field
The present invention relates to weld repair technique field, in particular to a kind of mould corrosion location renovation technique.
Background technology
The major part of low pressure casting die of aluminum alloy hub is process usually using hot die steel, in production process
In, the aluminum melt of (680~720) DEG C enters mold cavity from holding furnace by stalk and cast gate, fills after the completion of type to mould
Cooled down, start pressure release after casting solidification, stalk and poured the intraoral aluminum melt that do not solidify and be back to again in low-voltage temperature-keeping stove,
In the production process of circulation, cast gate position due to repeatedly fill type heating, cooling and pressure release, it is local equivalent to mould
It is tempered so that hardness, wearability and the corrosion resistance continuous decrease of mould steel, washed away back and forth through aluminum melt, mould is opened
Matched moulds and casting are stripped, and the coating on mould can wear in casting process to come off, and makes the hot die steel body and aluminium of cast gate
Liquation is directly contacted, and Fe-Al phase intermediate compounds can be formed between aluminum melt and iron, because it is very unstable, can further be added
Speed corrosion.For example, the hardness after the new die of H13 hot die steels production is quenched reaches (42~45) HRC, 1000 moulds of production
Hardness can drop to (30~35) HRC afterwards, and 2000 moulds have dropped down to (28~30) HRC, and hardness reduces rear mold cast gate side
It is easy to be corroded by aluminum melt at edge, corrosion, which reaches, to a certain degree can impact the moulding of casting, it is necessary to mould gate
Repaired.Present repair technology is welded using the welding rod of the trade mark identical with mold materials (such as H13 hot die steels)
Mend, then weld seam is machined, return to the original moulding of cast gate, after soldering, in order to eliminate welding stress, prevent from welding
Place's cracking, recovers hardness, anti-wear performance and the decay resistance of mould steel, it is necessary to be heat-treated again, but now mould sheet
Body has been finished product, and mould will deform when being quenched again, not only have impact on cast product precision and size, also to be increased
Cost is heat-treated, extension repairs a die the cycle.
The content of the invention
It is contemplated that at least solves one of technical problem present in prior art or correlation technique.
Therefore, it is an object of the invention to provide a kind of mould corrosion location renovation technique.
To achieve the above object, technical scheme provides a kind of mould corrosion location renovation technique, including with
Lower step：Step 1), remove the cast gate position being corroded in mould and form position to be processed；Step 2), the mould is carried out
The pre- hot mould of thermosetting；Step 3), the position to be processed in the hot mould is entered using precipitation hardening type wlding
Row soldering forms soldering position；Step 4), soldering position is finished, the soldering position is recovered to the cast gate position
Original moulding；Step 5), the mould is heated, the wlding at soldering position is hardened by precipitation.
In the technical scheme, rear mold is repaired by using above-mentioned renovation technique, the anti-erosion life at cast gate position from
2000 moulds are brought up to more than 8000 moulds time, in addition, the mould after repairing does not have to quench again, mould entirety deformation quantity is small, control
Deflection processed does not influence the precision and size of cast product within 0.1mm, reduces heat treatment cost, shortens repairing efficiency, together
When mould hardness can improve to 48HRC to 52HRC, reach requirement.
In addition, the mould corrosion location renovation technique in above-mentioned technical proposal provided by the invention can also be with following attached
Add technical characteristic：
In the above-mentioned technical solutions, it is preferable that in the step 3), the soldering position is using precipitation-hardening steel argon arc
Welding rod carries out soldering to the position to be processed and formed.
In the technical scheme, the removal on mould is corroded portion by using special precipitation-hardening steel argon arc welding rod
Position carries out soldering, have high cracking resistance, easy processing, higher tension stress, metallographic density it is high, to minute surface degree, corrosion-resistant, abrasion performance
The characteristics of with extraordinary effect.
In any of the above-described technical scheme, it is preferable that in the step 5), the mould is warming up to 480 DEG C extremely
550 DEG C, 1 to 2 hour is incubated, recovery to the cast gate position of original moulding is hardened by precipitation.
In the technical scheme, by being heated to the mould after finishing, and cast gate position is hardened by precipitation, without again
Quenching, it is only necessary to which low temperature is hardened by precipitation, and mould entirety deformation quantity is small, and control deflection does not influence cast product within 0.1mm
Precision and size, reduce heat treatment cost, shorten repairing efficiency, while the hardness of mould can be improved to 48HRC extremely
52HRC, reach requirement.
In any of the above-described technical scheme, it is preferable that in the step 2), preheating temperature is 330 DEG C to 380 DEG C, insulation 1
To 2 hours.
In the technical scheme, by being preheated to mould so that will not be because of the larger formation of the temperature difference when carrying out soldering
Larger cold and hot stress damaged to caused by mould, reduce the possibility that bursts of mould, increase the mold use life-span.
In any of the above-described technical scheme, it is preferable that in the step 1), remove the cast gate position being corroded in mould
Depth H is at least 3mm.
In the technical scheme, 3mm is not less than by the depth H for limiting cast gate position, carry out soldering for mould stops in advance
Enough welding positions, the welding stress between welding block and mould is reduced, prevents weld from ftractureing, the mould after soldering can be made to continue to make
With not producing peeling phenomenon, so as to improve the utilization rate of mould, reduce production cost.
In any of the above-described technical scheme, it is preferable that in the step 1), remove the cast gate position being corroded in mould
Width L is at least 5mm.
In the technical scheme, 5mm is not less than by the width L for limiting cast gate position, carry out soldering for mould stops in advance
Enough welding positions, the welding stress between welding block and mould is reduced, prevents weld from ftractureing, the mould after soldering can be made to continue to make
With not producing peeling phenomenon, so as to improve the utilization rate of mould, reduce production cost.
In any of the above-described technical scheme, it is preferable that in step 3), carry out soldering to the position to be processed and form weldering
After mending position, the mould is heated to 390 DEG C to 420 DEG C, is incubated 1 to 2 hour.
In the technical scheme, by being heated up to the mould after soldering, the welding reduced between welding block and mould should
Power, prevent weld from ftractureing, can be continuing with the mould after soldering, not produce peeling phenomenon, so as to improve the profit of mould
With rate, production cost is reduced.
In any of the above-described technical scheme, it is preferable that also include：Step 5), flaw detection inspection is carried out to other positions in mould
Look into；Step 6), abrasion or crackle caused by die surface are polishing to and expose mold base material；Step 7), in the mold base material
Surface soldering forms cushion；Step 8), soldering is carried out on the buffer layer and forms strengthening layer.
In the technical scheme, after other position defect detecting tests to mould, corresponding crackle or abrasion are carried out
Repair, reduce the removal part of mould, extend the mold use life-span, improve the anti-erosion life of mould.
In any of the above-described technical scheme, it is preferable that the strengthening layer is at least two layers.
In the technical scheme, strengthen the erosive wear resistance of die surface by strengthening layer, extend the mold use life-span,
The precision and size of cast product are not influenceed, while the hardness of mould can be improved to 48HRC to 52HRC, reach requirement.
In any of the above-described technical scheme, it is preferable that the thickness of every layer of strengthening layer is 3mm to 5mm.
In the technical scheme, by limiting the thickness of strengthening layer, the erosive wear resistance of die surface is further enhanced, is prolonged
In the long mold use life-span, the precision and size of cast product are not influenceed, while the hardness of mould can be improved to 48HRC extremely
52HRC, reach requirement.
The additional aspect and advantage of the present invention will become obvious in following description section, or the practice by the present invention
Recognize.
Brief description of the drawings
Fig. 1 shows the mould corrosion location renovation technique FB(flow block) according to the present invention；
Fig. 2 shows the sectional view at position to be processed in the mould corrosion location renovation technique according to the present invention；
Corresponding relation in Fig. 1 and Fig. 2 between reference and component names is：
10 positions to be processed.
Embodiment
It is below in conjunction with the accompanying drawings and specific real in order to be more clearly understood that the above objects, features and advantages of the present invention
Mode is applied the present invention is further described in detail.It should be noted that in the case where not conflicting, the implementation of the application
Feature in example and embodiment can be mutually combined.
Many details are elaborated in the following description to facilitate a thorough understanding of the present invention, still, the present invention may be used also
To be different from other modes described here using other to implement, therefore, protection scope of the present invention is not limited to following public affairs
The limitation for the specific embodiment opened.
Mould corrosion location renovation technique according to an embodiment of the invention is carried out specifically with reference to Fig. 1 and Fig. 2
It is bright.
As depicted in figs. 1 and 2, mould corrosion location renovation technique according to an embodiment of the invention, comprises the following steps：
Step 1), remove the cast gate position being corroded in mould and form position 10 to be processed；Step 2), preheating shape is carried out to the mould
Into hot mould；Step 3), the position 10 to be processed in the hot mould is welded using precipitation hardening type wlding
Benefit forms soldering position；Step 4), soldering position is finished, the soldering position is recovered original to the cast gate position
Moulding；Step 5), the mould is heated, the wlding at soldering position is hardened by precipitation.
In this embodiment, repair rear mold by using above-mentioned renovation technique, the anti-erosion life at cast gate position from
2000 moulds are brought up to more than 8000 moulds time, in addition, the mould after repairing does not have to quench again, mould entirety deformation quantity is small, control
Deflection processed does not influence the precision and size of cast product within 0.1mm, reduces heat treatment cost, shortens repairing efficiency, together
When mould hardness can improve to 48HRC to 52HRC, reach requirement.
Wherein, the processing modes such as gas cutting can be used by removing the position that is corroded of mould.
In the above embodiment, it is preferable that in the step 3), the soldering position is using precipitation-hardening steel argon arc welding
Bar carries out soldering to the position 10 to be processed and formed.
In this embodiment, the removal on mould is corroded position by using special precipitation-hardening steel argon arc welding rod
Soldering is carried out, there is high cracking resistance, easy processing, higher tension stress, metallographic density is high, has to minute surface degree, corrosion-resistant, abrasion performance
There is the characteristics of extraordinary effect.
In any of the above-described embodiment, it is preferable that in step 5), the mould is warming up into 480 DEG C to 550 DEG C, protected
Temperature 1 to 2 hour.
In this embodiment, by being heated to the mould after finishing, and cast gate position is hardened by precipitation, without quenching again
Fire, it is only necessary to which low temperature is hardened by precipitation, and mould entirety deformation quantity is small, and control deflection does not influence cast product within 0.1mm
Precision and size, heat treatment cost is reduced, shortens repairing efficiency, while the hardness of mould can be improved to 48HRC to 52HRC,
Reach requirement.
In any of the above-described embodiment, it is preferable that in the step 2), preheating temperature be 330 DEG C to 380 DEG C, insulation 1 to
2 hours.
In this embodiment, by being preheated to mould so that will not be because of the larger formation of the temperature difference when carrying out soldering
Larger cold and hot stress damages to caused by mould, reduces the possibility that mould is burst, and increases the mold use life-span.
Wherein, preheating is carried out to mould and uses Convective Heating mode, be heated evenly with mould, the spy of mould quick heating
Point, reduce the mould heat time, improve efficiency.
In any of the above-described embodiment, it is preferable that in the step 1), remove the depth at the cast gate position being corroded in mould
It is at least 3mm to spend H.
In this embodiment, it is not less than 3mm by limiting the depth H at cast gate position, it is reserved enough to carry out soldering for mould
Welding position, reduce the welding stress between welding block and mould, prevent weld from ftractureing, can be continuing with the mould after soldering,
Peeling phenomenon is not produced, so as to improve the utilization rate of mould, reduces production cost.
In any of the above-described embodiment, it is preferable that in the step 1), remove the width at the cast gate position being corroded in mould
It is at least 5mm to spend L.
In this embodiment, it is not less than 5mm by limiting the width L at cast gate position, it is reserved enough to carry out soldering for mould
Welding position, reduce the welding stress between welding block and mould, prevent weld from ftractureing, can be continuing with the mould after soldering,
Peeling phenomenon is not produced, so as to improve the utilization rate of mould, reduces production cost.
Wherein, the size of be corroded position width L and the depth H of removal can suitably be adjusted according to the extent of corrosion of mould
It is whole, it is not limited to above-mentioned size.
In any of the above-described embodiment, it is preferable that in step 3), carry out soldering to the position 10 to be processed and form weldering
After mending position, the mould is heated to 390 DEG C to 420 DEG C, is incubated 1 to 2 hour.
In this embodiment, by being heated up to the mould after soldering, the welding stress between reduction welding block and mould,
Prevent weld from ftractureing, can be continuing with the mould after soldering, not produce peeling phenomenon, so as to improve the utilization of mould
Rate, reduce production cost.
Wherein, before being finished to mould, can first by mould by air-cooled to being processed after normal temperature, can also
Hot mould is directly finished.
In any of the above-described embodiment, it is preferable that also include：Step 5), defect detecting test is carried out to other positions in mould；
Step 6), abrasion or crackle caused by die surface are polishing to and expose mold base material；Step 7), on the mold base material surface
Soldering forms cushion；Step 8), soldering is carried out on the buffer layer and forms strengthening layer.
In this embodiment, after by other position defect detecting tests to mould, corresponding crackle or abrasion are repaiied
It is multiple, the removal part of mould is reduced, extends the mold use life-span, improves the anti-erosion life of mould.
In any of the above-described embodiment, it is preferable that the strengthening layer is at least two layers.
In this embodiment, strengthen the erosive wear resistance of die surface by strengthening layer, extend the mold use life-span, no
The precision and size of cast product are influenceed, while the hardness of mould can be improved to 48HRC to 52HRC, reach requirement.
In any of the above-described embodiment, it is preferable that the thickness of every layer of strengthening layer is 3mm to 5mm.
In this embodiment, by limiting the thickness of strengthening layer, the erosive wear resistance of die surface is further enhanced, is extended
In the mold use life-span, the precision and size of cast product are not influenceed, while the hardness of mould can be improved to 48HRC extremely
52HRC, reach requirement.
Specific embodiment
A kind of mould corrosion location renovation technique, comprises the following steps：Step 1), remove the gate part being corroded in mould
Position forms position 10 to be processed, and the depth H for removing the cast gate position being corroded in mould is 3mm, width L is 5mm；Step 2),
The pre- hot mould of thermosetting is carried out to the mould, preheating temperature is 350 DEG C, is incubated 1 hour；Step 3), to the hot mould
The position 10 to be processed in tool carries out soldering and forms soldering position, after the completion of soldering, heats the mould to 400 DEG C, protects
Temperature 1 hour；Step 4), soldering position is finished, the soldering position is recovered to original moulding at the cast gate position, institute
It is to carry out soldering to the position 10 to be processed using precipitation-hardening steel argon arc welding rod to form to state soldering position, the soldering position
After the completion of finishing, the mould is warming up to 500 DEG C, 1 to 2 hour is incubated, makes recovery to the gate part of original moulding
Position precipitation-hardening；Step 5), defect detecting test is carried out to other positions in mould；Step 6), to caused by die surface abrasion or
Crackle, which is polishing to, exposes mold base material；Step 7), on the mold base material surface, soldering forms cushion；Step 8), buffering
Soldering is carried out on layer and forms two layers of reinforced material, the thickness of every layer of strengthening layer is 4mm.
Technical scheme is described in detail above in association with accompanying drawing, the invention provides a kind of mould corrosion location to repair
Return to work skill, repair rear mold by using above-mentioned renovation technique, the anti-erosion life at cast gate position is brought up to from 2000 moulds
More than 8000 moulds time, in addition, the mould after repairing does not have to quench again, mould entirety deformation quantity is small, and control deflection is in 0.1mm
Within, the precision and size of cast product are not influenceed, are reduced heat treatment cost, are shortened repairing efficiency, while the hardness of mould can
To improve to 48HRC to 52HRC, reach requirement.
In the description of this specification, the description of term " one embodiment ", " some embodiments ", " specific embodiment " etc.
Mean to combine at least one reality that specific features, structure, material or the feature that the embodiment or example describe are contained in the present invention
Apply in example or example.In this manual, identical implementation or example are not necessarily referring to the schematic representation of above-mentioned term.
Moreover, specific features, structure, material or the feature of description can be in any one or more embodiments or example with suitable
Mode combine.
The preferred embodiments of the present invention are these are only, are not intended to limit the invention, for those skilled in the art
For member, the present invention can have various modifications and variations.Any modification within the spirit and principles of the invention, being made,
Equivalent substitution, improvement etc., should be included in the scope of the protection.
Claims (10)
1. a kind of mould corrosion location renovation technique, it is characterised in that comprise the following steps：
Step 1), remove the cast gate position being corroded in mould and form position to be processed；
Step 2), the pre- hot mould of thermosetting is carried out to the mould；
Step 3), soldering is carried out using precipitation hardening type wlding to the position to be processed in the hot mould and forms soldering
Position；
Step 4), soldering position is finished, the soldering position is recovered to original moulding at the cast gate position；
Step 5), the mould is heated, the wlding at soldering position is hardened by precipitation.
2. mould corrosion location renovation technique according to claim 1, it is characterised in that in the step 3), the weldering
It is to carry out soldering to the position to be processed using precipitation-hardening steel argon arc welding rod to form to mend position.
3. mould corrosion location renovation technique according to claim 2, it is characterised in that in the step 5), by described in
Mould is warming up to 480 DEG C to 550 DEG C, is incubated 1 to 2 hour.
4. mould corrosion location renovation technique according to claim 1, it is characterised in that in the step 2), preheating temperature
Spend for 330 DEG C to 380 DEG C, be incubated 1 to 2 hour.
5. mould corrosion location renovation technique according to claim 1, it is characterised in that in the step 1), remove mould
The depth H at the cast gate position being corroded in tool is at least 3mm.
6. mould corrosion location renovation technique according to any one of claim 1 to 5, it is characterised in that the step
1) in, the width L for removing the cast gate position being corroded in mould is at least 5mm.
7. mould corrosion location renovation technique according to any one of claim 1 to 5, it is characterised in that in step 3)
In, after soldering formation soldering position is carried out to the position to be processed, the mould is heated to 390 DEG C to 420 DEG C, insulation 1 to 2
Hour.
8. mould corrosion location renovation technique according to any one of claim 1 to 5, it is characterised in that also include：
Step 5), defect detecting test is carried out to other positions in mould；
Step 6), abrasion or crackle caused by die surface are polishing to and expose mold base material；
Step 7), on the mold base material surface, soldering forms cushion；
Step 8), soldering is carried out on the buffer layer and forms strengthening layer.
9. mould corrosion location renovation technique according to claim 8, it is characterised in that the strengthening layer is at least two
Layer.
10. mould corrosion location renovation technique according to claim 9, it is characterised in that the thickness of every layer of strengthening layer
Spend for 3mm to 5mm.
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| CN201710691373.1A CN107470849A (en) | 2017-08-14 | 2017-08-14 | Mould corrosion location renovation technique |
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|---|---|---|---|
| CN201710691373.1A CN107470849A (en) | 2017-08-14 | 2017-08-14 | Mould corrosion location renovation technique |
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| CN107470849A true CN107470849A (en) | 2017-12-15 |
Family
ID=60600324
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| CN201710691373.1A Pending CN107470849A (en) | 2017-08-14 | 2017-08-14 | Mould corrosion location renovation technique |
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| CN108705180A (en) * | 2018-06-05 | 2018-10-26 | 西南交通大学 | A kind of online weldering repair renovation method of groove profile rail military service damage |
| CN109128683A (en) * | 2018-08-10 | 2019-01-04 | 上海清河机械有限公司 | A kind of fluid end clack box inner cavity and plunger end sealing hole restorative procedure |
| CN111633305A (en) * | 2020-05-25 | 2020-09-08 | 中国第一汽车股份有限公司 | H13 steel mould argon arc welding method |
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| CN109128683A (en) * | 2018-08-10 | 2019-01-04 | 上海清河机械有限公司 | A kind of fluid end clack box inner cavity and plunger end sealing hole restorative procedure |
| CN111633305A (en) * | 2020-05-25 | 2020-09-08 | 中国第一汽车股份有限公司 | H13 steel mould argon arc welding method |
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Application publication date: 20171215 |