CN101838727B - Heat treatment method for carbide blade base - Google Patents
Heat treatment method for carbide blade base Download PDFInfo
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- CN101838727B CN101838727B CN201010181078XA CN201010181078A CN101838727B CN 101838727 B CN101838727 B CN 101838727B CN 201010181078X A CN201010181078X A CN 201010181078XA CN 201010181078 A CN201010181078 A CN 201010181078A CN 101838727 B CN101838727 B CN 101838727B
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Abstract
The invention discloses a heat treatment method for a carbide blade base. The heat treatment method comprises the following steps of: firstly, performing vacuum heating on the carbide blade before coating to the temperature of between 1,050 and 1,400 DEG C; secondly, maintaining the temperature for 10 to 120 minutes, introducing 2 to 20 bar of cooling gas to quickly cool the carbide blade base to the temperature of between 700 and 900 DEG C; and finally, maintaining the atmosphere in the furnace so as to slowly cool to room temperature. The heat treatment method has the advantages of simplified process flow, simple operation, high efficiency, environmental protection, improvement of the binding force between the base and the coating, and the like.
Description
Technical field
The present invention relates to a kind of processing and treating method, relate in particular to a kind of heat treating method carbide chip to wimet.
Background technology
Coated cemented carbide insert has been widely used in the metal cutting manufacture field at present.Wimet is in the man-hour that adds of the tool die material that is used as industries such as machinery, mine, electronics, standardized component; Though have high firmness, premium properties such as wear-resisting, corrosion-resistant; But the time as metal cutting tool; Then there is the defective that causes tipping, brittle failure and premature wear to lose efficacy because of poor toughness, seriously limited the use range of carbide chip; Particularly in by the impact load occasion, not only require wimet to have high firmness, high-wearing feature, importantly it also need have the good whole obdurability.
Early stage wimet thermal treatment is to adopt the tempering of oil quenching final vacuum, has all introduced the method that adopts vacuum quenching oil that probing, rock drilling are heat-treated with wimet and brazing sheet of hard alloy in low cobalt as CN1827828A number with CN101050511A Chinese patent document.If carbide cutting blade also adopts oil quenching to heat-treat, then will have following problem: 1) surface and oil contaminant is difficult to clean, influences follow-up coating quality; 2) speed of cooling is too fast, causes corresponding thermal stresses and thermal distortion too big, thereby is difficult to guarantee the dimensional precision of blade.Therefore, coated cemented carbide insert should not adopt oil quenching to handle.CN101481783A Chinese patent document adopts high pressure gas quenching technology with increase wimet solid solution strengthening effect, thereby improves hardness of alloy and bending strength, but this technology must be carried out low-temperaturetempering after quenching.
Summary of the invention
Technical problem to be solved by this invention is the deficiency that overcomes prior art, the heat treating method of the carbide blade base that propose that a kind of technical process is simplified, simple to operate, efficient, environmental protection and helping improves matrix and coating bonding force.
For solving the problems of the technologies described above; The technical scheme that the present invention proposes is a kind of heat treating method of carbide blade base, and this heat treating method may further comprise the steps: at first, the carbide blade base heating under vacuum before the coating is warmed up to 1050 ℃～1400 ℃; Be incubated 10min～120min then; Insulation finishes the cooling gas that the back feeds 2bar～20bar, makes said carbide blade base be cooled fast to 700 ℃～900 ℃, keeps furnace atmosphere to slowly cool to room temperature then.
In the heat treating method of above-mentioned carbide blade base, said cooling gas is preferably N
2, Ar, H
2Or He.
In the heat treating method of above-mentioned carbide blade base, the quick colling stages of said carbide blade base, the pressure of cooling gas is controlled at 5bar～10bar.Cold gas physical efficiency under this preferred pressure is controlled chilling speed better.
In the heat treating method of above-mentioned carbide blade base, preferably be controlled at 1150 ℃～1250 ℃ between said heat preservation zone.
In the heat treating method of above-mentioned carbide blade base, said soaking time preferably is controlled at 20min～60min.
Above-mentioned preferred thermal treatment temp and soaking time can be controlled the solubleness of WC better, thereby make the strengthening effect of hard alloy substrate and alloy property reach good balance.
In the heat treating method of above-mentioned carbide blade base, the average cooling rate of said quick colling stages preferably is controlled at 200 ℃/min～500 ℃/min; The average cooling rate of said slow colling stages preferably be controlled at 10 ℃/below the min.
In the heat treating method of above-mentioned carbide blade base, the heat-up rate in said heat temperature raising stage preferably is controlled at 1 ℃/min～10 ℃/min.
Compared with prior art; Heat treating method of the present invention is, to feed high pressure gas carbide blade base is forced cooling after the stage at heating under vacuum, vacuum heat-preserving, owing to be to adopt high pressure gas to cool off; And colling stages is divided into earlier colling stages and the slow colling stages in back fast; Through the process for cooling in these two stages, the internal stress that thermal treatment is produced drops to minimum level, eliminates thermal stresses to such an extent as to need not follow-up tempering process; Replace traditional quenching-tempering process with primary quenching technology, technical process obtains simplifying.Contriver of the present invention has done further optimization through experiment repeatedly to the key processing parameter of the each item in the whole heat treating method, makes the present invention reach best level to the thermal effectiveness of carbide blade base.In addition, because the present invention adopts heating under vacuum-high pressure gas type of cooling, carbide blade base surface C o distributes than more even before the thermal treatment, and surface clearness improves, thereby more helps improving carbide blade base and the bonding force that is coated with interlayer.Through thermal treatment of the present invention, also improved the wear resistance and the fracture toughness property of hard alloy substrate greatly, be a kind of thermal treatment process of efficient, environmental protection.
Embodiment
Embodiment 1
A kind of model is the carbide blade base of APMT1135PDR, and its composition comprises the Co of 10wt.% and the WC of 90wt.%, and the mean particle size of WC is 0.8 μ m.This carbide blade base is after 1410 ℃ of following sintering are accomplished; Adopt heat treating method of the present invention that it is handled: to be placed on earlier in the vacuum high-pressure heat treatment furnace; And be heated to 1200 ℃ and be incubated 30min with the heat-up rate of 8 ℃/min, in stove, feed the high-purity N of 8bar subsequently
2Make carbide blade base be quickly cooled to 800 ℃; The average cooling rate of colling stages reaches 295 ℃/min fast; Continue then to keep this furnace atmosphere and pressure to make carbide blade base slowly cool to 50 ℃, slowly the average cooling rate of colling stages is 7.5 ℃/min, and slowly whole heat treatment process is accomplished in the cooling back.
Adopt the PVD method to be coated with the TiAlN coating of a layer thickness 2 μ m～5 μ m on this carbide blade base after the thermal treatment.
The carbide blade base of present embodiment is as shown in table 1 below through the forward and backward performance index of the inventive method thermal treatment:
Carbide blade base is in the forward and backward performance comparison of thermal treatment among table 1: the embodiment 1
Visible by last table 1, the fracture toughness property of the carbide blade base after bakingout process obviously improves.
Embodiment 2
A kind of model is the carbide blade base of SEKR1204AZ-YM, and its composition comprises the Co of 10wt.% and the WC of 90wt.%, and the mean particle size of WC is 2.6 μ m.This carbide blade base is after 1440 ℃ of following sintering are accomplished; Adopt heat treating method of the present invention that it is handled: to be placed on earlier in the vacuum high-pressure heat treatment furnace; And be heated to 1200 ℃ and be incubated 40min with the heat-up rate of 8 ℃/min, in stove, feed the high-purity N of 10bar subsequently
2Make carbide blade base be quickly cooled to 800 ℃; The average cooling rate of colling stages reaches 328 ℃/min fast; Continue then to keep this furnace atmosphere and pressure to make carbide blade base slowly cool to 50 ℃, slowly the average cooling rate of colling stages is 8.5 ℃/min, and slowly whole heat treatment process is accomplished in the cooling back.
Adopt the PVD method to be coated with the TiAlN coating of a layer thickness 2 μ m～5 μ m on this carbide blade base after the thermal treatment.
The carbide blade base of present embodiment is as shown in table 2 below through the forward and backward performance index of the inventive method thermal treatment:
Carbide blade base is in the forward and backward performance comparison of thermal treatment among table 2: the embodiment 2
Visible by last table 2, the hardness and the fracture toughness property of the carbide blade base after bakingout process all are improved significantly.
The contrast experiment 1
The hard alloy coated blade that obtains at last with present embodiment respectively and without the heat treated common coated chip working steel products NAK80 of present embodiment; And carry out impact property and test; Concrete machined parameters is: cutting speed V=120mm/min, width of cut Ae=40mm, depth of cut Ap=1.5mm; Amount of feed Fz=0.2mm/z, processing effect is as shown in table 3 below:
The coated chip of table 3: embodiment 2 and the processing effect of common coated chip in contrast experiment 1
Visible by last table 3, the hard alloy coated blade after bakingout process, its cutting time obviously increases, and the life-span of blade is greatly improved.
Comparison example 2:
The hard alloy coated blade that obtains at last with present embodiment respectively and without the heat treated common coated chip working steel products 42CrMo of present embodiment; And carry out comprehensive performance test; Concrete machined parameters is cutting speed V=250mm/min, depth of cut Ap=2mm, width of cut Ae=50mm; Amount of feed Fz=0.15mm/z, processing effect is as shown in table 4 below:
The work efficiency fruit that the coated chip of table 4: embodiment 2 and common coated chip add in contrast experiment 2
Visible by last table 4, the hard alloy coated blade after bakingout process, its cutting time obviously increases, and the life-span of blade is improved.
Embodiment 3
A kind of model is the carbide blade base of SEET12T3-DM, and its composition comprises the Co of 10wt.% and the WC of 90wt.%, and the mean particle size of WC is 0.8 μ m.This carbide blade base is after 1410 ℃ of following sintering are accomplished; Adopt heat treating method of the present invention that it is handled: to be placed on earlier in the vacuum high-pressure heat treatment furnace; And be heated to 1200 ℃ and be incubated 30min with the heat-up rate of 8 ℃/min, in stove, feed the high-purity N of 10bar subsequently
2Make carbide blade base be quickly cooled to 800 ℃; The average cooling rate of colling stages reaches 328 ℃/min fast; Continue then to keep this furnace atmosphere and pressure to make carbide blade base slowly cool to 50 ℃, slowly the average cooling rate of colling stages is 8.5 ℃/min, and slowly whole heat treatment process is accomplished in the cooling back.
Adopt the PVD method to be coated with the TiAlN coating of a layer thickness 2 μ m～5 μ m on this carbide blade base after the thermal treatment.
The carbide blade base of present embodiment is as shown in table 5 below through the forward and backward performance index of the inventive method thermal treatment:
Carbide blade base is in the forward and backward performance comparison of thermal treatment among table 5: the embodiment 3
Visible by last table 5, the hardness and the fracture toughness property of the carbide blade base after bakingout process all are improved significantly.
The contrast experiment 3
The hard alloy coated blade that obtains at last with present embodiment respectively and without the heat treated common coated chip processing magnesium iron QT250 of present embodiment; And carry out wear resisting property and test; Concrete machined parameters is cutting speed V=250mm/min, depth of cut Ap=2mm, width of cut Ae=50mm; Amount of feed Fz=0.2mm/z, processing effect is as shown in table 6 below:
The coated chip of table 6: embodiment 3 and the processing effect of common coated chip in contrast experiment 3
Visible by last table 6, the hard alloy coated blade after bakingout process, its cutting time obviously increases, and the life-span of blade is improved, and abrasion loss reduces, and antiwear property also increases.
The contrast experiment 4
The hard alloy coated blade that obtains at last with present embodiment respectively and without the heat treated common coated chip processing stainless steel QT250 of present embodiment; And carry out wear resisting property and test; Concrete machined parameters is cutting speed V=300mm/min, depth of cut Ap=1.5mm, width of cut Ae=50mm; Amount of feed Fz=0.15mm/z, processing effect is as shown in table 7 below:
The coated chip of table 7: embodiment 3 and the processing effect of common coated chip in contrast experiment 4
Visible by last table 7, the hard alloy coated blade after bakingout process, under identical situation of cutting time, abrasion loss reduces, and antiwear property obviously improves.
Claims (6)
1. the heat treating method of a carbide blade base; This heat treating method may further comprise the steps: at first; Carbide blade base heating under vacuum before the coating is warmed up to 1050 ℃～1400 ℃, is incubated 10min～120min then, insulation finishes the cooling gas that the back feeds 2bar～20bar; Make said carbide blade base be cooled fast to 700 ℃～900 ℃, keep furnace atmosphere to slowly cool to room temperature then;
The average cooling rate of said quick colling stages is controlled at 200 ℃/min～500 ℃/min; The average cooling rate of said slow colling stages be controlled at 10 ℃/below the min.
2. the heat treating method of carbide blade base according to claim 1, it is characterized in that: said cooling gas is N
2, Ar, H
2Or He.
3. the heat treating method of carbide blade base according to claim 1, it is characterized in that: the quick colling stages of said carbide blade base, the pressure of cooling gas is controlled at 5bar～10bar.
4. the heat treating method of carbide blade base according to claim 1 is characterized in that: be controlled at 1150 ℃～1250 ℃ between said heat preservation zone.
5. the heat treating method of carbide blade base according to claim 4, it is characterized in that: said soaking time is controlled at 20min～60min.
6. according to the heat treating method of each described carbide blade base in the claim 1～5, it is characterized in that: the heat-up rate in said heat temperature raising stage is controlled at 1 ℃/min～10 ℃/min.
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|---|---|---|---|
| CN201010181078XA CN101838727B (en) | 2010-05-24 | 2010-05-24 | Heat treatment method for carbide blade base |
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|---|---|---|---|
| CN201010181078XA CN101838727B (en) | 2010-05-24 | 2010-05-24 | Heat treatment method for carbide blade base |
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| CN101838727A CN101838727A (en) | 2010-09-22 |
| CN101838727B true CN101838727B (en) | 2012-11-28 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103469125B (en) * | 2013-09-10 | 2015-06-17 | 株洲硬质合金集团有限公司 | Heat treatment method of WC-Co-Ni3Al hard alloy |
| CN105695716A (en) * | 2016-01-29 | 2016-06-22 | 柳州市安龙机械设备有限公司 | Heat treatment method for hard alloy cutter |
| US11577303B2 (en) | 2016-07-28 | 2023-02-14 | Hangzhou Great Star Industrial Co., Ltd. | Manufacturing method of a cutting member |
| CN109385548A (en) * | 2018-10-25 | 2019-02-26 | 湖南工业大学 | A kind of hard alloy forming method cooling based on liquid nitrogen |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003001505A (en) * | 2001-04-05 | 2003-01-08 | Seco Tools Ab | Cemented carbide cutting tool insert for turning processing titanium alloy |
| CN101050511A (en) * | 2007-05-18 | 2007-10-10 | 自贡硬质合金有限责任公司 | Vacuum heat treatment method for brazing sheet of hard alloy in low cobalt |
| CN101056996A (en) * | 2004-11-10 | 2007-10-17 | 山特维克知识产权股份有限公司 | Cutting tool for metal working and method for producing it |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SE0700602L (en) * | 2007-03-13 | 2008-09-14 | Sandvik Intellectual Property | Carbide inserts and method of manufacturing the same |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003001505A (en) * | 2001-04-05 | 2003-01-08 | Seco Tools Ab | Cemented carbide cutting tool insert for turning processing titanium alloy |
| CN101056996A (en) * | 2004-11-10 | 2007-10-17 | 山特维克知识产权股份有限公司 | Cutting tool for metal working and method for producing it |
| CN101050511A (en) * | 2007-05-18 | 2007-10-10 | 自贡硬质合金有限责任公司 | Vacuum heat treatment method for brazing sheet of hard alloy in low cobalt |
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